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PLUGX: make more restrictive to fix FP #843

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merged 3 commits into from
Nov 15, 2023
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PLUGX: make more restrictive to fix FP #843

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PLUGX: make more restrictive to fix FP
williballenthin Nov 13, 2023
5d53af0
Update match-known-plugx-module.yml
williballenthin Nov 14, 2023
60b3981
Update malware-family/plugx/match-known-plugx-module.yml
williballenthin Nov 15, 2023
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131 changes: 69 additions & 62 deletions malware-family/plugx/match-known-plugx-module.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -6,73 +6,80 @@ rule:
authors:
- [email protected]
description: the sample references known PlugX watermarks (hexified YYYYMMDD + command opcode)
scope: function
scope: basic block
references:
- https://circl.lu/assets/files/tr-12/tr-12-circl-plugx-analysis-v1.pdf
- https://www.fireeye.com/blog/threat-research/2014/07/pacific-ring-of-fire-plugx-kaba.html
- https://www.avira.com/en/blog/new-wave-of-plugx-targets-hong-kong
examples:
- 64E9F62840DB2F65FC717CFAF99081F9:0x10024950
- 64E9F62840DB2F65FC717CFAF99081F9:0x10024BCB
features:
- and:
- or:
- instruction:
- description: module timestamp
- number: 0x20120225
- number: 0x20120324
- number: 0x20121107
- number: 0x20190301
- number: 0x20190520
- number: 0x20200208
- number: 0x88888888 # scrubbed timestamp
- or:
- number: 0x1001 = get system information
- number: 0x1002 = start pipe comms
- number: 0x1003 = echo input
- number: 0x1005 = restart self
- number: 0x2000 = lock workstation
- number: 0x2001 = shutdown workstation (forced)
- number: 0x2002 = reboot workstation
- number: 0x2003 = shutdown workstation (graceful)
- number: 0x2005 = show messagebox
- number: 0x3000 = get disk information
- number: 0x3001 = search directory for files
- number: 0x3004 = read file
- number: 0x3007 = write file
- number: 0x300A = create directory
- number: 0x300B = check if file exists
- number: 0x300C = create a new Windows desktop
- number: 0x300D = PerformSH_FileOperation
- number: 0x300E = ExpandEnvironmentVariable
- number: 0x300F = get current PlugX module directory
- number: 0x4000 = create remote desktop thread
- number: 0x4004 = send mouse event
- number: 0x4005 = send keyboard event
- number: 0x4006 = send CTRL-Alt-Delete
- number: 0x4100 = take screenshot
- number: 0x5000 = create process
- number: 0x5001 = enumerate processes
- number: 0x5002 = kill process
- number: 0x6000 = query service config
- number: 0x6001 = change service config (forced)
- number: 0x6002 = start service
- number: 0x6003 = control service
- number: 0x6004 = delete service
- number: 0x7002 = create remote shell
- number: 0x7100 = create telnet server
- number: 0x9000 = enumerate registry keys
- number: 0x9001 = create registry key
- number: 0x9002 = delete registry key
- number: 0x9003 = copy registry key
- number: 0x9004 = enumerate registry values
- number: 0x9005 = set registry value
- number: 0x9006 = delete registry value
- number: 0x9007 = get registry value
- number: 0xA000 = enumerate network resources
- number: 0xB000 = start port mapping
- number: 0xC000 = get sql data source information
- number: 0xC001 = get sql driver description
- number: 0xC002 = execute sql statement
- number: 0xD000 = get TCP table
- number: 0xD001 = get UDP table
- number: 0xD002 = set TCP entry
- number: 0xE000 = start keylogger thread
- mnemonic: mov
- operand[0].offset: 0
- or:
- operand[1].number: 0x20120225
- operand[1].number: 0x20120324
- operand[1].number: 0x20121107
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- operand[1].number: 0x20190301
- operand[1].number: 0x20190520
- operand[1].number: 0x20200208
- operand[1].number: 0x88888888 # scrubbed timestamp
- instruction:
- description: command id
- mnemonic: mov
- operand[0].offset: 4
- or:
- operand[1].number: 0x1001 = get system information
- operand[1].number: 0x1002 = start pipe comms
- operand[1].number: 0x1003 = echo input
- operand[1].number: 0x1005 = restart self
- operand[1].number: 0x2000 = lock workstation
- operand[1].number: 0x2001 = shutdown workstation (forced)
- operand[1].number: 0x2002 = reboot workstation
- operand[1].number: 0x2003 = shutdown workstation (graceful)
- operand[1].number: 0x2005 = show messagebox
- operand[1].number: 0x3000 = get disk information
- operand[1].number: 0x3001 = search directory for files
- operand[1].number: 0x3004 = read file
- operand[1].number: 0x3007 = write file
- operand[1].number: 0x300A = create directory
- operand[1].number: 0x300B = check if file exists
- operand[1].number: 0x300C = create a new Windows desktop
- operand[1].number: 0x300D = PerformSH_FileOperation
- operand[1].number: 0x300E = ExpandEnvironmentVariable
- operand[1].number: 0x300F = get current PlugX module directory
- operand[1].number: 0x4000 = create remote desktop thread
- operand[1].number: 0x4004 = send mouse event
- operand[1].number: 0x4005 = send keyboard event
- operand[1].number: 0x4006 = send CTRL-Alt-Delete
- operand[1].number: 0x4100 = take screenshot
- operand[1].number: 0x5000 = create process
- operand[1].number: 0x5001 = enumerate processes
- operand[1].number: 0x5002 = kill process
- operand[1].number: 0x6000 = query service config
- operand[1].number: 0x6001 = change service config (forced)
- operand[1].number: 0x6002 = start service
- operand[1].number: 0x6003 = control service
- operand[1].number: 0x6004 = delete service
- operand[1].number: 0x7002 = create remote shell
- operand[1].number: 0x7100 = create telnet server
- operand[1].number: 0x9000 = enumerate registry keys
- operand[1].number: 0x9001 = create registry key
- operand[1].number: 0x9002 = delete registry key
- operand[1].number: 0x9003 = copy registry key
- operand[1].number: 0x9004 = enumerate registry values
- operand[1].number: 0x9005 = set registry value
- operand[1].number: 0x9006 = delete registry value
- operand[1].number: 0x9007 = get registry value
- operand[1].number: 0xA000 = enumerate network resources
- operand[1].number: 0xB000 = start port mapping
- operand[1].number: 0xC000 = get sql data source information
- operand[1].number: 0xC001 = get sql driver description
- operand[1].number: 0xC002 = execute sql statement
- operand[1].number: 0xD000 = get TCP table
- operand[1].number: 0xD001 = get UDP table
- operand[1].number: 0xD002 = set TCP entry
- operand[1].number: 0xE000 = start keylogger thread
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