Overview

overview

10

Static

static

10

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    125s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2024 06:13

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General

  • Target

    1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe

  • Size

    75KB

  • MD5

    84db43a164ce3f375e38430aa3c817c5

  • SHA1

    7e65f3e57b37f3b184666277df75f645d3a7cc19

  • SHA256

    1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a

  • SHA512

    82f4c2a54a06cd00c47f19d55e9a6f09b2ce0047b9a861f1bb3b9f7272b29504fa98f385b3fc1dc7f1aaef90755ee1990aa0cf38b956db5504301cf72927212e

  • SSDEEP

    1536:mgK9CZq03G5aXCTMu+oCAhb92SyPYKAOSLgqiOhABeuvXMMTy7O:xC2q03GtorMb92OOSgqiOoe2wO

Score
10/10
xwormpersistencerattrojan

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %AppData%

  • install_file

    taskhostw.exe

  • pastebin_url

    https://pastebin.com/raw/Xuc6dzua

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • 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
    persistence
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 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).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.exe
    "C:\Users\Admin\AppData\Local\Temp\1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a.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:1688
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "taskhostw" /tr "C:\Users\Admin\AppData\Roaming\taskhostw.exe"
      2⤵
      • Creates scheduled task(s)
      PID:5008
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4208,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=4088 /prefetch:8
    1⤵
      PID:2740
    • C:\Users\Admin\AppData\Roaming\taskhostw.exe
      C:\Users\Admin\AppData\Roaming\taskhostw.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2440
    • C:\Users\Admin\AppData\Roaming\taskhostw.exe
      C:\Users\Admin\AppData\Roaming\taskhostw.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1476

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads

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

      654B

      MD5

      2ff39f6c7249774be85fd60a8f9a245e

      SHA1

      684ff36b31aedc1e587c8496c02722c6698c1c4e

      SHA256

      e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

      SHA512

      1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

      Download Submit

    • C:\Users\Admin\AppData\Roaming\taskhostw.exe
      Filesize

      75KB

      MD5

      84db43a164ce3f375e38430aa3c817c5

      SHA1

      7e65f3e57b37f3b184666277df75f645d3a7cc19

      SHA256

      1b2fee364fcde4a8e05a7f7a08f6fa68141e5ee6492a0ff23328d6e94a87925a

      SHA512

      82f4c2a54a06cd00c47f19d55e9a6f09b2ce0047b9a861f1bb3b9f7272b29504fa98f385b3fc1dc7f1aaef90755ee1990aa0cf38b956db5504301cf72927212e

      Download Submit

    • memory/1688-0-0x00007FFC065C3000-0x00007FFC065C5000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1688-1-0x0000000000430000-0x0000000000448000-memory.dmp

      Filesize

      96KB

      Download

    • memory/1688-2-0x00007FFC065C0000-0x00007FFC07081000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/1688-7-0x00007FFC065C3000-0x00007FFC065C5000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1688-8-0x00007FFC065C0000-0x00007FFC07081000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/2440-11-0x00007FFC065C0000-0x00007FFC07081000-memory.dmp

      Filesize

      10.8MB

      Download

    • memory/2440-13-0x00007FFC065C0000-0x00007FFC07081000-memory.dmp

      Filesize

      10.8MB

      Download