Analysis

  • max time kernel
    131s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    10-11-2024 12:11

General

  • Target

    ea1792f689bfe5ad3597c7f877b66f9fcf80d732e5233293d52d374d50cab991.msi

  • Size

    1.6MB

  • MD5

    3cb6b99b20930ac0dbadc10899dc511e

  • SHA1

    570c4ab78cf4bb22b78aac215a4a79189d4fa9ed

  • SHA256

    ea1792f689bfe5ad3597c7f877b66f9fcf80d732e5233293d52d374d50cab991

  • SHA512

    aedf58ea01d59cce191cb9c0f83dbdbf7e3e8f049c764b577d6a957cb5229c50dda7ec6760ca43ad4dbdb085ae02b07bc818f69ca08373243019af6683e4931c

  • SSDEEP

    49152:5Sj3YhW8zBQSc0ZnSKSZKumZr7A+zafUWM1q:oYY0ZnQK/A7fQ

Malware Config

Signatures

  • Brute Ratel C4

    A customized command and control framework for red teaming and adversary simulation.

  • Bruteratel family
  • Detect BruteRatel badger 3 IoCs
  • Blocklisted process makes network request 56 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 13 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 11 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 43 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\ea1792f689bfe5ad3597c7f877b66f9fcf80d732e5233293d52d374d50cab991.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2872
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1288
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 5653031849D7C18127471786DC2024A7
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:2760
    • C:\Windows\Installer\MSIA691.tmp
      "C:\Windows\Installer\MSIA691.tmp" /DontWait C:/Windows/SysWOW64/rundll32.exe C:\Users\Admin\AppData\Roaming\vierm_soft_x64.dll, GetDeepDVCState
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:2564
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2876
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "0000000000000590" "00000000000005A4"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:2232
  • C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\SysWOW64\rundll32.exe" C:\Users\Admin\AppData\Roaming\vierm_soft_x64.dll, GetDeepDVCState
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1148
    • C:\Windows\system32\rundll32.exe
      "C:\Windows\SysWOW64\rundll32.exe" C:\Users\Admin\AppData\Roaming\vierm_soft_x64.dll, GetDeepDVCState
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      PID:2308

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Config.Msi\f76a3f1.rbs

    Filesize

    1KB

    MD5

    9b83b7004bcf380dd7655d95136feaef

    SHA1

    2f56e726bc7f6f105d525a046b8f18ca3030d0f1

    SHA256

    298f835b8063702a013a80e1214fd4c1d978fed56cdefc9b05887fc4bb263d33

    SHA512

    fca1feab1b98ddd87e5bcee719bbeb0f3f7ce4720401763d4c77c94b5d785487a7212935654e2602defab41b722d959c37935cb364601e694578a6f5d394555d

  • C:\Users\Admin\AppData\Roaming\vierm_soft_x64.dll

    Filesize

    749KB

    MD5

    b1ca25f5bb4edd293b3711c77eb99a6f

    SHA1

    178bba8686ea329b884a652fe0f8a0ae0c53d367

    SHA256

    97a6331239d451d7dfe15bfe17de8b419df741ae68bacd440808f8b8d3f99b8a

    SHA512

    d5a282a8f81e117b79616c44a260d89c7fee06f4ac1387675bc79c3bd7599a5d49fbe3d8fb3d4d42eea81a17564abc2d42288bc2dc468d1b16ed633ba421b32d

  • C:\Windows\Installer\MSIA41C.tmp

    Filesize

    436KB

    MD5

    475d20c0ea477a35660e3f67ecf0a1df

    SHA1

    67340739f51e1134ae8f0ffc5ae9dd710e8e3a08

    SHA256

    426e6cf199a8268e8a7763ec3a4dd7add982b28c51d89ebea90ca792cbae14dd

    SHA512

    99525aaab2ab608134b5d66b5313e7fc3c2e2877395c5c171897d7a6c66efb26b606de1a4cb01118c2738ea4b6542e4eb4983e631231b3f340bf85e509a9589e

  • C:\Windows\Installer\MSIA691.tmp

    Filesize

    389KB

    MD5

    b9545ed17695a32face8c3408a6a3553

    SHA1

    f6c31c9cd832ae2aebcd88e7b2fa6803ae93fc83

    SHA256

    1e0e63b446eecf6c9781c7d1cae1f46a3bb31654a70612f71f31538fb4f4729a

    SHA512

    f6d6dc40dcba5ff091452d7cc257427dcb7ce2a21816b4fec2ee249e63246b64667f5c4095220623533243103876433ef8c12c9b612c0e95fdfffe41d1504e04

  • memory/2308-56-0x000007FEFD290000-0x000007FEFD2FC000-memory.dmp

    Filesize

    432KB

  • memory/2308-49-0x0000000001DD0000-0x0000000001E0E000-memory.dmp

    Filesize

    248KB

  • memory/2308-48-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/2308-51-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/2308-58-0x0000000001E10000-0x0000000001E5C000-memory.dmp

    Filesize

    304KB

  • memory/2308-54-0x00000000770D0000-0x00000000771EF000-memory.dmp

    Filesize

    1.1MB

  • memory/2308-52-0x00000000771F0000-0x0000000077399000-memory.dmp

    Filesize

    1.7MB

  • memory/2308-67-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/2308-68-0x0000000001E10000-0x0000000001E5C000-memory.dmp

    Filesize

    304KB

  • memory/2564-38-0x0000000000160000-0x0000000000162000-memory.dmp

    Filesize

    8KB