Techniques
Sample rules
Windows Ldifde Directory Object Behavior
- source: splunk
- technicques:
- T1105
- T1069.002
Description
The following analytic identifies the use of Ldifde.exe, which provides the ability to create, modify, or delete LDAP directory objects. Natively, the binary is only installed on a domain controller. However, adversaries or administrators may install the Windows Remote Server Admin Tools for ldifde.exe. Ldifde.exe is a Microsoft Windows command-line utility used to import or export LDAP directory entries. LDAP stands for Lightweight Directory Access Protocol, which is a protocol used for accessing and managing directory information services over an IP network. LDIF, on the other hand, stands for LDAP Data Interchange Format, a standard plain-text data interchange format for representing LDAP directory entries. -i This is a flag used with Ldifde.exe to denote import mode. In import mode, Ldifde.exe takes an LDIF file and imports its contents into the LDAP directory. The data in the LDIF file might include new objects to be created, or modifications or deletions to existing objects. -f This flag is used to specify the filename of the LDIF file that Ldifde.exe will import from (in the case of the -i flag) or export to (without the -i flag). For example, if you wanted to import data from a file called data.ldif, you would use the command ldifde -i -f data.ldif. Keep in mind that while the use of Ldifde.exe is legitimate in many contexts, it can also be used maliciously. For instance, an attacker who has gained access to a domain controller could potentially use Ldifde.exe to export sensitive data or make unauthorized changes to the directory. Therefore, it’s important to monitor for unusual or unauthorized use of this tool.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_name=ldifde.exe Processes.process IN ("*-i *", "*-f *") by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.original_file_name Processes.process Processes.process_id Processes.parent_process_id
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_ldifde_directory_object_behavior_filter`
Linux Make Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
The Linux make command is used to build and maintain groups of programs and files from the source code. In Linux, it is one of the most frequently used commands by the developers. It assists developers to install and compile many utilities from the terminal. If sudo right is given to make utility for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*make*-s*" AND Processes.process="*--eval*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_make_privilege_escalation_filter`
Linux c99 Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
The c99 utility is an interface to the standard C compilation system; it shall accept source code conforming to the ISO C standard. The system conceptually consists of a compiler and link editor. If sudo right is given to ruby application for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*c99*" AND Processes.process="*-wrapper*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_c99_privilege_escalation_filter`
Linux Emacs Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
EMACS is a family of text editors that are characterized by their extensibility. The manual for the most widely used variant, GNU Emacs, describes it as “the extensible, customizable, self-documenting, real-time display editor”. If sudo right is given to EMACS tool for the user, then the user can run special commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*emacs*" AND Processes.process="*--eval*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_emacs_privilege_escalation_filter`
Linux Octave Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
GNU Octave is a high-level programming language primarily intended for scientific computing and numerical computation. Octave helps in solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with MATLAB. If sudo right is given to the application for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*octave-cli*" AND Processes.process="*--eval*" AND Processes.process="*system*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_octave_privilege_escalation_filter`
Linux Csvtool Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
csvtool is an easy to use command-line tool to work with .CSV files. If sudo right is given to the tool for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*csvtool*" AND Processes.process="*call*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_csvtool_privilege_escalation_filter`
Linux pkexec Privilege Escalation
- source: splunk
- technicques:
- T1068
Description
The following analytic identifies pkexec spawning with no command-line arguments. A vulnerability in Polkit’s pkexec component identified as CVE-2021-4034 (PwnKit) which is present in the default configuration of all major Linux distributions and can be exploited to gain full root privileges on the system.
Detection logic
| tstats `security_content_summariesonly` count FROM datamodel=Endpoint.Processes where Processes.process_name=pkexec by _time Processes.dest Processes.user Processes.process_id Processes.parent_process_name Processes.process_name Processes.process Processes.process_path
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| regex process="(^.{1}$)"
| `linux_pkexec_privilege_escalation_filter`
Linux GNU Awk Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
gawk command in Linux is used for pattern scanning and processing language. The awk command requires no compiling and allows the user to use variables, numeric functions, string functions, and logical operators. It is a utility that enables programmers to write tiny and effective programs in the form of statements that define text patterns that are to be searched for, in a text document and the action that is to be taken when a match is found within a line. If sudo right is given to gawk tool for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*gawk*" AND Processes.process="*BEGIN*{system*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `linux_gnu_awk_privilege_escalation_filter`
Windows Snake Malware Kernel Driver Comadmin
- source: splunk
- technicques:
- T1547.006
Description
The following analytic identifies the comadmin.dat file written to disk, which is related to Snake Malware. From the report, Snakes installer drops the kernel driver and a custom DLL which is used to load the driver into a single AES encrypted file on disk. Typically, this file is named comadmin.dat and is stored in the %windows%\system32\Com directory.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Filesystem where Filesystem.file_path="*\\windows\\system32\\com\\*" AND Filesystem.file_name="comadmin.dat" by Filesystem.file_create_time Filesystem.process_id Filesystem.file_name Filesystem.file_path Filesystem.dest
| `drop_dm_object_name(Filesystem)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_snake_malware_kernel_driver_comadmin_filter`
Linux Gem Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing Ruby programs and libraries (in a self-contained format called a “gem”), a tool designed to easily manage the installation of gems, and a server for distributing them. If sudo right is given to GEM utility for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*gem*open*-e*" AND Processes.process="*-c*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_gem_privilege_escalation_filter`
Linux OpenVPN Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
OpenVPN is a virtual private network system that implements techniques to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. It implements both client and server applications. If sudo right is given to the OpenVPN application for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*openvpn*" AND Processes.process="*--dev*" AND Processes.process="*--script-security*" AND Processes.process="*--up*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_openvpn_privilege_escalation_filter`
Linux apt-get Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
The apt-get is a command line tool for interacting with the Advanced Package Tool (APT) library (a package management system for Linux distributions). It allows you to search for, install, manage, update, and remove software. The tool does not build software from the source code. If sudo right is given to the tool for user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*apt-get*" AND Processes.process="*APT::Update::Pre-Invoke::*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_apt_get_privilege_escalation_filter`
Linux PHP Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
PHP is a general-purpose scripting language geared toward web development. It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1994. The PHP reference implementation is now produced by The PHP Group. If sudo right is given to php application for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*php*-r*" AND Processes.process="*system*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_php_privilege_escalation_filter`
Linux Sqlite3 Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
sqlite3 is a terminal-based front-end to the SQLite library that can evaluate queries interactively and display the results in multiple formats. sqlite3 can also be used within shell scripts and other applications to provide batch processing features. If sudo right is given to this application for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*sqlite3*" AND Processes.process="*.shell*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_sqlite3_privilege_escalation_filter`
Linux Puppet Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
In computing, Puppet is a software configuration management tool which includes its own declarative language to describe system configuration. It is a model-driven solution that requires limited programming knowledge to use. If sudo right is given to the tool for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*puppet*" AND Processes.process="*apply*" AND Processes.process="*-e*" AND Processes.process="*exec*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_puppet_privilege_escalation_filter`
Linux Composer Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
Composer is a tool for dependency management in PHP. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you. If sudo right is given to tool for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*composer*" AND Processes.process="*run-script*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_composer_privilege_escalation_filter`
Linux GDB Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
GDB is the acronym for GNU Debugger. This tool helps to debug the programs written in C, C++, Ada, Fortran, etc. The console can be opened using the gdb command on terminal. If sudo right is given to GDB tool for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*gdb*" AND Processes.process="*-nx*" AND Processes.process="*-ex*!*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_gdb_privilege_escalation_filter`
Linux Busybox Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It provides minimalist replacements for most of the utilities you usually find in GNU coreutils, util-linux, etc. If sudo right is given to BusyBox application for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*busybox*" AND Processes.process="*sh*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_busybox_privilege_escalation_filter`
Linux Cpulimit Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
cpulimit is a simple program which attempts to limit the cpu usage of a process (expressed in percentage, not in cpu time). This is useful to control batch jobs, when you don’t want them to eat too much cpu. If sudo right is given to the program for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*cpulimit*" AND Processes.process="*-l*" AND Processes.process="*-f*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_cpulimit_privilege_escalation_filter`
Linux c89 Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
The c89 and cc commands compile, assemble, and link-edit C programs; the cxx or c++ command does the same for C++ programs. The c89 command should be used when compiling C programs that are written according to Standard C. If sudo right is given to c89 application for the user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*c89*" AND Processes.process="*-wrapper*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_c89_privilege_escalation_filter`
Linux APT Privilege Escalation
- source: splunk
- technicques:
- T1548.003
- T1548
Description
Advanced Package Tool, more commonly known as APT, is a collection of tools used to install, update, remove, and otherwise manage software packages on Debian and its derivative operating systems, including Ubuntu and Linux Mint. If sudo right is given to the tool for user, then the user can run system commands as root and possibly get a root shell.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*apt*" AND Processes.process="*APT::Update::Pre-Invoke::*" AND Processes.process="*sudo*" by Processes.dest Processes.user Processes.parent_process_name Processes.process_name Processes.process Processes.process_id Processes.parent_process_id Processes.process_guid
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `linux_apt_privilege_escalation_filter`
PaperCut NG Remote Web Access Attempt
- source: splunk
- technicques:
- T1190
- T1133
Description
The following analytic is designed to detect potential exploitation attempts on publicly accessible PaperCut NG servers. It identifies connections from public IP addresses to the server and specifically monitors for URI paths commonly found in proof-of-concept (POC) scripts for exploiting PaperCut NG vulnerabilities. These URI paths have been observed in both Metasploit modules and standalone scripts used for attacking PaperCut NG servers. When a public IP address is detected accessing one or more of these suspicious URI paths, an alert may be generated to notify the security team of the potential threat. The team can then investigate the source IP address, the targeted PaperCut NG server, and any other relevant information to determine the nature of the activity and take appropriate actions to mitigate the risk.
Detection logic
| tstats count from datamodel=Web where Web.url IN ("/app?service=page/SetupCompleted", "/app", "/app?service=page/PrinterList", "/app?service=direct/1/PrinterList/selectPrinter&sp=*", "/app?service=direct/1/PrinterDetails/printerOptionsTab.tab") NOT (src IN ("10.*.*.*","172.16.*.*", "192.168.*.*", "169.254.*.*", "127.*.*.*", "fc00::*", "fd00::*", "fe80::*")) by Web.http_user_agent Web.http_method, Web.url,Web.url_length Web.src, Web.dest Web.dest_port sourcetype
| `drop_dm_object_name("Web")`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `papercut_ng_remote_web_access_attempt_filter`