Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    03-11-2024 09:05

General

  • Target

    29549b75a198ad3aee4f8b9ea328bc9a73eb0e0d07e36775438bbe7268d453f9.msi

  • Size

    1.6MB

  • MD5

    9775cb36162fab5d8dbe372cd5910ba7

  • SHA1

    a06d73422ecb931b6b6ae9f2af5f08f50b3d52dc

  • SHA256

    29549b75a198ad3aee4f8b9ea328bc9a73eb0e0d07e36775438bbe7268d453f9

  • SHA512

    42cc3d3746fc416097b7de340cf1782febe957ee45e17b5c368f6509bb5112cfdd808d223283ef424b5ee1aab0dddc78562a778f196f7962c3f27839f4f60564

  • SSDEEP

    49152:gfj3YhW8zBQSc0ZnSKSZKumZr7AlFBBdtM:cYY0ZnQK/AlprM

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 64 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 23 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\29549b75a198ad3aee4f8b9ea328bc9a73eb0e0d07e36775438bbe7268d453f9.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2520
  • 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:2404
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 56B2D0DF86A45115275E172299491CC0
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:2924
    • C:\Windows\Installer\MSIE381.tmp
      "C:\Windows\Installer\MSIE381.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:2224
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2244
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "00000000000005D8" "0000000000000310"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:2576
  • 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:1584
    • 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:1616

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Config.Msi\f76db75.rbs

    Filesize

    1KB

    MD5

    2fe79578cf987d2c54768257e91be68f

    SHA1

    447e3c7bb6690ca913d066388205dc794a539ffa

    SHA256

    c5b12a5323bffb6e4ee167641a4f07f24be5021ed91b8acc69e5e564638f6209

    SHA512

    581ee1aec1cf852feb5036a03030488ea55934ce73712acefcf2dac90442740721a5cd8ef8f5be5a6b76b6d9f4e691aa2230357f0581acab438b7c2ad63b7407

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

    Filesize

    666KB

    MD5

    877c8b214d984656143d7576f832d935

    SHA1

    26bedae9e05afbff75ede2efc7777a376e362b6a

    SHA256

    28f5e949ecad3606c430cea5a34d0f3e7218f239bcfa758a834dceb649e78abc

    SHA512

    f07ac6795f4d8de38ac7f92a5ae308d2bdc30e29cebdf93b7fdee958c04bb83b1a28c4e6ac4e6a770b6d207af2a886cc93028b26e8850327f55391118f2d621a

  • C:\Windows\Installer\MSIDC1C.tmp

    Filesize

    436KB

    MD5

    475d20c0ea477a35660e3f67ecf0a1df

    SHA1

    67340739f51e1134ae8f0ffc5ae9dd710e8e3a08

    SHA256

    426e6cf199a8268e8a7763ec3a4dd7add982b28c51d89ebea90ca792cbae14dd

    SHA512

    99525aaab2ab608134b5d66b5313e7fc3c2e2877395c5c171897d7a6c66efb26b606de1a4cb01118c2738ea4b6542e4eb4983e631231b3f340bf85e509a9589e

  • C:\Windows\Installer\MSIE381.tmp

    Filesize

    389KB

    MD5

    b9545ed17695a32face8c3408a6a3553

    SHA1

    f6c31c9cd832ae2aebcd88e7b2fa6803ae93fc83

    SHA256

    1e0e63b446eecf6c9781c7d1cae1f46a3bb31654a70612f71f31538fb4f4729a

    SHA512

    f6d6dc40dcba5ff091452d7cc257427dcb7ce2a21816b4fec2ee249e63246b64667f5c4095220623533243103876433ef8c12c9b612c0e95fdfffe41d1504e04

  • memory/1616-49-0x0000000001F30000-0x0000000001F6E000-memory.dmp

    Filesize

    248KB

  • memory/1616-51-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/1616-54-0x0000000077600000-0x000000007771F000-memory.dmp

    Filesize

    1.1MB

  • memory/1616-58-0x0000000001F70000-0x0000000001FBC000-memory.dmp

    Filesize

    304KB

  • memory/1616-56-0x000007FEFD6A0000-0x000007FEFD70C000-memory.dmp

    Filesize

    432KB

  • memory/1616-48-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/1616-52-0x0000000077820000-0x00000000779C9000-memory.dmp

    Filesize

    1.7MB

  • memory/1616-67-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/1616-68-0x0000000001F70000-0x0000000001FBC000-memory.dmp

    Filesize

    304KB

  • memory/2224-36-0x0000000000160000-0x0000000000162000-memory.dmp

    Filesize

    8KB