Analysis

  • max time kernel
    130s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-11-2024 02:10

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 17 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 9 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:2460
  • 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:2344
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding AD8551CFD75E2215C74527BA277603BB
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:1032
    • C:\Windows\Installer\MSI2C82.tmp
      "C:\Windows\Installer\MSI2C82.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:2872
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2992
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "00000000000002F4" "00000000000005D8"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:2708
  • 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:1436
    • 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:1988

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Config.Msi\f772244.rbs

    Filesize

    1KB

    MD5

    e3064e4f3381e47cc44590566ab86a95

    SHA1

    4c490dafbf852012e19f4a4622f2128a922f57a4

    SHA256

    b537a1b2f5dee8263d9d5cd77c51a738e0850f5630002e4a2552dbebff02443e

    SHA512

    35493585f7b6aeca7c1a2f034ab357238f22eef93c7250f24e370cd775b163946ddbe49c96c88188c4c196d0733da73ca4c4ec13bde334a85eba622087ee5f7f

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

    Filesize

    666KB

    MD5

    877c8b214d984656143d7576f832d935

    SHA1

    26bedae9e05afbff75ede2efc7777a376e362b6a

    SHA256

    28f5e949ecad3606c430cea5a34d0f3e7218f239bcfa758a834dceb649e78abc

    SHA512

    f07ac6795f4d8de38ac7f92a5ae308d2bdc30e29cebdf93b7fdee958c04bb83b1a28c4e6ac4e6a770b6d207af2a886cc93028b26e8850327f55391118f2d621a

  • C:\Windows\Installer\MSI2349.tmp

    Filesize

    436KB

    MD5

    475d20c0ea477a35660e3f67ecf0a1df

    SHA1

    67340739f51e1134ae8f0ffc5ae9dd710e8e3a08

    SHA256

    426e6cf199a8268e8a7763ec3a4dd7add982b28c51d89ebea90ca792cbae14dd

    SHA512

    99525aaab2ab608134b5d66b5313e7fc3c2e2877395c5c171897d7a6c66efb26b606de1a4cb01118c2738ea4b6542e4eb4983e631231b3f340bf85e509a9589e

  • C:\Windows\Installer\MSI2C82.tmp

    Filesize

    389KB

    MD5

    b9545ed17695a32face8c3408a6a3553

    SHA1

    f6c31c9cd832ae2aebcd88e7b2fa6803ae93fc83

    SHA256

    1e0e63b446eecf6c9781c7d1cae1f46a3bb31654a70612f71f31538fb4f4729a

    SHA512

    f6d6dc40dcba5ff091452d7cc257427dcb7ce2a21816b4fec2ee249e63246b64667f5c4095220623533243103876433ef8c12c9b612c0e95fdfffe41d1504e04

  • memory/1988-58-0x0000000001FC0000-0x000000000200C000-memory.dmp

    Filesize

    304KB

  • memory/1988-49-0x0000000001EC0000-0x0000000001EFE000-memory.dmp

    Filesize

    248KB

  • memory/1988-52-0x0000000077480000-0x0000000077629000-memory.dmp

    Filesize

    1.7MB

  • memory/1988-48-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/1988-51-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/1988-56-0x000007FEFD5F0000-0x000007FEFD65C000-memory.dmp

    Filesize

    432KB

  • memory/1988-55-0x0000000077260000-0x000000007737F000-memory.dmp

    Filesize

    1.1MB

  • memory/1988-67-0x0000000273F40000-0x0000000273F8A000-memory.dmp

    Filesize

    296KB

  • memory/1988-68-0x0000000001FC0000-0x000000000200C000-memory.dmp

    Filesize

    304KB

  • memory/2872-36-0x0000000000260000-0x0000000000262000-memory.dmp

    Filesize

    8KB