Analysis

  • max time kernel
    137s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    16-05-2024 14:46

General

  • Target

    4b9d9e8512113210558953f19c7e6c2a_JaffaCakes118.exe

  • Size

    709KB

  • MD5

    4b9d9e8512113210558953f19c7e6c2a

  • SHA1

    a79f5b32c87cce6413c36741810dcc859ce42cac

  • SHA256

    6ca5561637075df7fc371638c56e9ecd3ba4967979e396619d5b9dfb69a10743

  • SHA512

    317244156c931561f2fe22999571a524cbf1050756d9584d0dba9aeb82ad76f8572dbc96447a100c9bc76d31adbcdfaaf4d5dd0c26e8efbabe2b984161709f87

  • SSDEEP

    12288:rkcj3Ez4oa3NX7ebbUxvFwSxTk+MRH8Sn9vTUpAYT2MHCTX:5oeabONwwTOHp9KAYi04

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

svhost

C2

myconect.ddns.net:6606

Mutex

VNM_MUTEX_ND6PULLW5ZVLwo1nwR

Attributes
  • encryption_key

    yaa63tXY4j55os5llHHd

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Signatures

  • Contains code to disable Windows Defender 3 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 IoCs
  • VenomRAT

    VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b9d9e8512113210558953f19c7e6c2a_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\4b9d9e8512113210558953f19c7e6c2a_JaffaCakes118.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2364
    • C:\Users\Admin\AppData\Roaming\$77-Venom.exe
      "C:\Users\Admin\AppData\Roaming\$77-Venom.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2620
    • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Roaming\null (2).docx"
      2⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2280
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
          PID:2020

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

      Filesize

      20KB

      MD5

      94888bc6df4781787960157bd54a1994

      SHA1

      ba662f5b09304f0e0145090f7082e4c057637eb8

      SHA256

      fc4c78b21100791bcf3012d13654ab5ebdda2f8520ca42885fe8cc408a9e9388

      SHA512

      2eb4fcca660c57ec7410c66a5bc6baa001f5ed5f36cf62880745de82fd097c8f0ebe529c58c8e4fd9ab51b6b38ac7923a2ca1733a1781e72ecd1584d3a94434e

    • C:\Users\Admin\AppData\Roaming\Microsoft\UProof\ExcludeDictionaryEN0409.lex

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • C:\Users\Admin\AppData\Roaming\null (2).docx

      Filesize

      2KB

      MD5

      b73ace90e3fbada0e8baa0d47b2cbd6f

      SHA1

      2147bfa5d92cb0c3fd296e7c90befa08564240a6

      SHA256

      94f271283b679ee024724d1aee0f4ead90ce56fb67813b5e0cbc082091fbe364

      SHA512

      d1a9d73fca25a73782bd0170937225afdb402a354a7fb6ea308114e276aed7f77ef211c458dd03292d2e90cd1d61976340396540ac410d452bda363f6d2ee157

    • \Users\Admin\AppData\Roaming\$77-Venom.exe

      Filesize

      534KB

      MD5

      84c1dc6b428904cc2a6746653849df0f

      SHA1

      5cce4078427481f4d7456b5a4f3930ae6e706fb4

      SHA256

      bc24e3c5408fea0b6f9aa0deb56a4636a8d0b9a6054ff1033efa6ccfe04ba44a

      SHA512

      3b7a7607c3409b5ded563f2e1fcc0fa489c4465ab764d14a647b474968a025a95fa8ceb549fc70482b7b1dd935f66a41ada7b4910059786aafc870c5847a9245

    • memory/2280-13-0x000000002FDD1000-0x000000002FDD2000-memory.dmp

      Filesize

      4KB

    • memory/2280-47-0x000000006C98D000-0x000000006C998000-memory.dmp

      Filesize

      44KB

    • memory/2280-67-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2280-16-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2280-17-0x000000006C98D000-0x000000006C998000-memory.dmp

      Filesize

      44KB

    • memory/2364-0-0x0000000074611000-0x0000000074612000-memory.dmp

      Filesize

      4KB

    • memory/2364-14-0x0000000074610000-0x0000000074BBB000-memory.dmp

      Filesize

      5.7MB

    • memory/2364-2-0x0000000074610000-0x0000000074BBB000-memory.dmp

      Filesize

      5.7MB

    • memory/2364-1-0x0000000074610000-0x0000000074BBB000-memory.dmp

      Filesize

      5.7MB

    • memory/2620-11-0x00000000722FE000-0x00000000722FF000-memory.dmp

      Filesize

      4KB

    • memory/2620-46-0x0000000004AD0000-0x0000000004B10000-memory.dmp

      Filesize

      256KB

    • memory/2620-45-0x00000000722FE000-0x00000000722FF000-memory.dmp

      Filesize

      4KB

    • memory/2620-15-0x0000000004AD0000-0x0000000004B10000-memory.dmp

      Filesize

      256KB

    • memory/2620-12-0x0000000001060000-0x00000000010EC000-memory.dmp

      Filesize

      560KB