Analysis

  • max time kernel
    158s
  • max time network
    169s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-03-2023 14:47

General

  • Target

    4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

  • Size

    66KB

  • MD5

    8682c4dc2e3ae57079e9ada0943b813d

  • SHA1

    d855ac963756f24d67297c1c9b94b86d6e5350ba

  • SHA256

    4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

  • SHA512

    a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

  • SSDEEP

    1536:Yd077VI2kTksimD7A9sb0sBmaOu8EJSRK:Z9kT5imD7Osb0umaOuxGK

Malware Config

Signatures

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 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\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
    "C:\Users\Admin\AppData\Local\Temp\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2444
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22" /tr "C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2880
  • C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
    C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2476
  • C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
    C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:216

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe.log

    Filesize

    654B

    MD5

    2ff39f6c7249774be85fd60a8f9a245e

    SHA1

    684ff36b31aedc1e587c8496c02722c6698c1c4e

    SHA256

    e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

    SHA512

    1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

  • C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

    Filesize

    66KB

    MD5

    8682c4dc2e3ae57079e9ada0943b813d

    SHA1

    d855ac963756f24d67297c1c9b94b86d6e5350ba

    SHA256

    4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

    SHA512

    a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

  • C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

    Filesize

    66KB

    MD5

    8682c4dc2e3ae57079e9ada0943b813d

    SHA1

    d855ac963756f24d67297c1c9b94b86d6e5350ba

    SHA256

    4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

    SHA512

    a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

  • C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

    Filesize

    66KB

    MD5

    8682c4dc2e3ae57079e9ada0943b813d

    SHA1

    d855ac963756f24d67297c1c9b94b86d6e5350ba

    SHA256

    4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

    SHA512

    a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

  • C:\Users\Admin\AppData\Roaming\4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22.exe

    Filesize

    66KB

    MD5

    8682c4dc2e3ae57079e9ada0943b813d

    SHA1

    d855ac963756f24d67297c1c9b94b86d6e5350ba

    SHA256

    4b9d11ad0a32fd2d76d4d8e9256f13df37b7628df9eb50b21dd11016d0a4ca22

    SHA512

    a7eb2a5db32d0b96e0bc761454bf9bc40bde24ff8a6eab52c799d6438c2e64d1b0fb914a75b34256e488f76b9ec7423eea82537a772f599b8e02e8199c8e5ace

  • memory/2444-133-0x0000000000B40000-0x0000000000B56000-memory.dmp

    Filesize

    88KB

  • memory/2444-134-0x000000001B810000-0x000000001B820000-memory.dmp

    Filesize

    64KB

  • memory/2444-143-0x000000001B810000-0x000000001B820000-memory.dmp

    Filesize

    64KB