Resubmissions

31-05-2024 08:26

240531-kb5gxscc8t 10

30-05-2024 13:27

240530-qp8dmaab3y 10

30-05-2024 11:10

240530-m9qgrsfb9x 10

Analysis

  • max time kernel
    107s
  • max time network
    103s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    30-05-2024 13:27

General

  • Target

    XClient.exe

  • Size

    62KB

  • MD5

    3f171ed4261c46329a1bcc62ebb19519

  • SHA1

    06768df330b8012ee3d0cb22723408636ba7c17a

  • SHA256

    3c096dc60917ae1e47a754fd578882f1286ee9114ff5c6558b4f84f0be69076f

  • SHA512

    81e90ab476967a8ca6b88f8060fe72b56450dae6300adfbcef346dfb4c523e054da05d192209ff53771a8b49ad6a6922151d905a5a6bbc8decfe551ab757a06d

  • SSDEEP

    1536:1RE9Nr0ZWB8lQkagw9DC1oTnNbSkoRek+OUpS:1RE9NQZWB8XaguCWNbSHwk+OUE

Malware Config

Extracted

Family

xworm

Version

3.0

C2

scamov-48667.portmap.host:48667

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    Cheat.exe

  • telegram

    https://api.telegram.org/bot6992734078:AAE3Znug3pzwyvwxKrzRk75x1dHIdnYHy4Q/sendMessage?chat_id=6790913039

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • 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).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 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\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4472
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Local\XClient.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2252
  • C:\Users\Admin\AppData\Local\XClient.exe
    C:\Users\Admin\AppData\Local\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4868
  • C:\Users\Admin\AppData\Local\XClient.exe
    C:\Users\Admin\AppData\Local\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4644

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    654B

    MD5

    16c5fce5f7230eea11598ec11ed42862

    SHA1

    75392d4824706090f5e8907eee1059349c927600

    SHA256

    87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151

    SHA512

    153edd6da59beea6cc411ed7383c32916425d6ebb65f04c65aab7c1d6b25443d143aa8449aa92149de0ad8a975f6ecaa60f9f7574536eec6b38fe5fd3a6c6adc

  • C:\Users\Admin\AppData\Local\XClient.exe

    Filesize

    62KB

    MD5

    3f171ed4261c46329a1bcc62ebb19519

    SHA1

    06768df330b8012ee3d0cb22723408636ba7c17a

    SHA256

    3c096dc60917ae1e47a754fd578882f1286ee9114ff5c6558b4f84f0be69076f

    SHA512

    81e90ab476967a8ca6b88f8060fe72b56450dae6300adfbcef346dfb4c523e054da05d192209ff53771a8b49ad6a6922151d905a5a6bbc8decfe551ab757a06d

  • memory/4472-0-0x00007FFC74E63000-0x00007FFC74E64000-memory.dmp

    Filesize

    4KB

  • memory/4472-1-0x00000000004C0000-0x00000000004D6000-memory.dmp

    Filesize

    88KB

  • memory/4472-2-0x00007FFC74E60000-0x00007FFC7584C000-memory.dmp

    Filesize

    9.9MB

  • memory/4472-11-0x00007FFC74E63000-0x00007FFC74E64000-memory.dmp

    Filesize

    4KB

  • memory/4472-12-0x00007FFC74E60000-0x00007FFC7584C000-memory.dmp

    Filesize

    9.9MB

  • memory/4868-15-0x00007FFC74E60000-0x00007FFC7584C000-memory.dmp

    Filesize

    9.9MB

  • memory/4868-17-0x00007FFC74E60000-0x00007FFC7584C000-memory.dmp

    Filesize

    9.9MB