Analysis

  • max time kernel
    50s
  • max time network
    59s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25-09-2024 07:30

Errors

Reason
Machine shutdown

General

  • Target

    RustAnticheat.exe

  • Size

    1.1MB

  • MD5

    0d0d79a916d356823c4742f3253aa6aa

  • SHA1

    5e267d313557b5dbf6c216e79190b20fb5ab8177

  • SHA256

    20868115f180702553380c551df502535b8aa01c3ef630d408edd849896e631a

  • SHA512

    9bbc72f3b647885dee27a27f5e30e2c845f5eb395bcf545ba7c75d65a0386f9c97dab4348a946fd693a90f4994550fda41a0528072cfeb8106ab603232573365

  • SSDEEP

    24576:drAsHOi4ltSzmSEPGUSa/D3mIaCmo/NE1a1pvRQrhWgJbavyRAh79c0ih:5Lu1tSzmhR/nCo/K0pZQrE2RAh79Lih

Malware Config

Extracted

Family

xworm

C2

web-amend.gl.at.ply.gg:59501

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    USB.exe

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1288399761308782603/dBc32ufL91AjkI32Qso8IT_vaA0Frj3MP9_ivfjpfIEs4tXDc5SB89aA7LHc09xTZHZv

Signatures

  • Detect Umbral payload 2 IoCs
  • Detect Xworm Payload 2 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 1 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 15 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\RustAnticheat.exe
    "C:\Users\Admin\AppData\Local\Temp\RustAnticheat.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2584
    • C:\Users\Admin\AppData\Roaming\Loader (1).exe
      "C:\Users\Admin\AppData\Roaming\Loader (1).exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:2784
    • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
      "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2740
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3856
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:2868
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\RuntimeBroker'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:4924
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:4120
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RuntimeBroker" /tr "C:\Users\Admin\RuntimeBroker"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:912
      • C:\Windows\SYSTEM32\shutdown.exe
        shutdown.exe /f /s /t 0
        3⤵
          PID:4004
      • C:\Users\Admin\AppData\Roaming\Litvin.exe
        "C:\Users\Admin\AppData\Roaming\Litvin.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1668
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic.exe" csproduct get uuid
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3640
    • C:\Users\Admin\RuntimeBroker
      C:\Users\Admin\RuntimeBroker
      1⤵
      • Executes dropped EXE
      PID:4472
    • C:\Windows\system32\LogonUI.exe
      "LogonUI.exe" /flags:0x0 /state0:0xa3aeb055 /state1:0x41c64e6d
      1⤵
      • Modifies data under HKEY_USERS
      • Suspicious use of SetWindowsHookEx
      PID:440

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

      Filesize

      3KB

      MD5

      8592ba100a78835a6b94d5949e13dfc1

      SHA1

      63e901200ab9a57c7dd4c078d7f75dcd3b357020

      SHA256

      fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c

      SHA512

      87f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      1KB

      MD5

      4fa9983ced8cd7cb9a973933e8383640

      SHA1

      ca8e417db2d550b6394a98202e45b5e62d981e46

      SHA256

      142e5386fdc4c0ee8bbb6aadba00215dcabfa239a9513877dccbd521fc398611

      SHA512

      bd58e2a1472ff86339cbdcdbc4f46f21e8c47e46095ff2c30a38dcd3afe6bb87cf04acdbfcc788912b812e1b1d6ef9d2d7d617e8247c4dbbf4ee954a466cb5ca

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      1KB

      MD5

      6c7f8cf7a5090a174fd3d27f8106f68c

      SHA1

      2779a57b81a805b238d2319661ede25c378df839

      SHA256

      b492c2e2b1f540dc2275365254e5056ba3acde2f3bc01db5e60671e63297ad66

      SHA512

      9607467667ed511caeb3abd40cb4f7341ef4170df274d6d89a04a860cf756b187e4e7545d4d7f8fb4cf61616353cc67223899b0f3fa61e0db218f6253d5ca828

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      1KB

      MD5

      79b8f5d126b4605a95898850857354d0

      SHA1

      420a2a767f1945a0efec6d67f80e900b5602486e

      SHA256

      c935fdd0fd0bf5e55e3944f47f15b77d686a61d3a4e5958f77b3117d477dda87

      SHA512

      031fa1883198a4fd2c5d8de52af960a9131f8ff94a3fd60ac4c0fb12bffb96d9b0b911b20410ca00300eb9dd74da2301e59a2694df8ea7f0ea014bdc050422ba

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bgrsvplq.0f3.ps1

      Filesize

      1B

      MD5

      c4ca4238a0b923820dcc509a6f75849b

      SHA1

      356a192b7913b04c54574d18c28d46e6395428ab

      SHA256

      6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

      SHA512

      4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

    • C:\Users\Admin\AppData\Roaming\Litvin.exe

      Filesize

      229KB

      MD5

      259101ea3a8a1c36a8ebe30f28deb851

      SHA1

      b5302bb4383bfa6e1f8a074182d1eecd79cd0caf

      SHA256

      91fd2cdc10b62a3aa10837c50c9dd2958f58a7c6feb6a5d29f73c5edca033999

      SHA512

      14c266cd69408d3cca1fa8dfeb0e9abedce87985b93bf6190b6436f74f122e06264c49c713d259eaa9f393180e3bef42462cb851686c2f32882cf03942e6dde3

    • C:\Users\Admin\AppData\Roaming\Loader (1).exe

      Filesize

      827KB

      MD5

      eefb801774c5ccb44153268a9357f5f1

      SHA1

      b1906b22e14edd142c52808ab3e5ba9346b85de5

      SHA256

      677aeb1981c58cba41a5d53ccbbf5b471e62dc49dc326570767da940560d840d

      SHA512

      1cf162fe6184d68dca514059d2de1123e80d0faac401765a54224aa5a987c9454bc92263fbec566835aa7b402f1f63ba59bb425ccc139e0a7391e66991f270b7

    • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe

      Filesize

      77KB

      MD5

      7c4f97717ce74232ede2fc0b48956636

      SHA1

      d7dd219805af9fb9251214d598badc3d4d1b7bf8

      SHA256

      f84e5ceb6d0c53993bf5139e7e58dcc06c8cc7d6bc1e5e97171445f6fe01109d

      SHA512

      ad1963a20fc98927239eb1aaa6f881913ac5884c28c00b59637e4fd51dbafd376150e1e6a5cf8634f6a5610bd2286dc185b3f14362c06a613dfe40db528cea26

    • memory/1668-19-0x0000021655B00000-0x0000021655B40000-memory.dmp

      Filesize

      256KB

    • memory/2584-0-0x00007FFD204C3000-0x00007FFD204C4000-memory.dmp

      Filesize

      4KB

    • memory/2584-1-0x0000000000010000-0x0000000000134000-memory.dmp

      Filesize

      1.1MB

    • memory/2740-15-0x00000000004A0000-0x00000000004BA000-memory.dmp

      Filesize

      104KB

    • memory/2740-20-0x00007FFD204C0000-0x00007FFD20EAC000-memory.dmp

      Filesize

      9.9MB

    • memory/2740-203-0x00007FFD204C0000-0x00007FFD20EAC000-memory.dmp

      Filesize

      9.9MB

    • memory/2740-207-0x00007FFD204C0000-0x00007FFD20EAC000-memory.dmp

      Filesize

      9.9MB

    • memory/2784-24-0x0000000008840000-0x0000000008878000-memory.dmp

      Filesize

      224KB

    • memory/2784-21-0x0000000000340000-0x0000000000416000-memory.dmp

      Filesize

      856KB

    • memory/3856-29-0x000002BE44EE0000-0x000002BE44F02000-memory.dmp

      Filesize

      136KB

    • memory/3856-32-0x000002BE45090000-0x000002BE45106000-memory.dmp

      Filesize

      472KB