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Resubmissions

02/09/2024, 04:11

240902-erx5ws1ekl 10

31/08/2024, 15:44

240831-s6y8dssajf 10

31/08/2024, 15:41

240831-s4ytva1gph 10

31/08/2024, 15:35

240831-s1fh4a1fjk 10

Analysis

  • max time kernel
    433s
  • max time network
    441s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    31/08/2024, 15:41

General

  • Target

    XClient.exe

  • Size

    84KB

  • MD5

    13f12b20731a141144d59aef56828f78

  • SHA1

    2aef63a0f584914b022ea7d039bd431fa99520b3

  • SHA256

    28041fc75ea0dd89b4cfa6338ff7dd3ef053bf5e49eca14f6d8e4acc003c9c6b

  • SHA512

    19f9aeb3ceed2cd0ab93e0f449174de9f07afba41f38c620a1480b052c18ce898d52b9c90f3cfe83611064b4b6cf7444041a4b1d52de214811436975802bcbaa

  • SSDEEP

    1536:E4VFkamGxes+ESPmWnz5fH0hgThsipZR8beJKNlG8V6f7/7zOD5gfRJoBP:E4VNxedPmWt04/UbeSly7/vOD5c4V

Malware Config

Extracted

Family

xworm

C2

178.215.236.68:7000

Attributes
  • install_file

    USB.exe

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

  • 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).

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1972
    • 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\Local\Temp\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3144
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4656
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp250E.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2472
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2KB

    MD5

    627073ee3ca9676911bee35548eff2b8

    SHA1

    4c4b68c65e2cab9864b51167d710aa29ebdcff2e

    SHA256

    85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

    SHA512

    3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

    Filesize

    944B

    MD5

    2e8eb51096d6f6781456fef7df731d97

    SHA1

    ec2aaf851a618fb43c3d040a13a71997c25bda43

    SHA256

    96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864

    SHA512

    0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pr0rikmm.wh0.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp250E.tmp.bat

    Filesize

    159B

    MD5

    e8a96f5a32cf6ffc0b7af511951a5c31

    SHA1

    4140d75f650564428ef7072965bee0b6acba8df6

    SHA256

    ded13ba93f4082c63e7d4c2b90cfdd1303606076d55c4339eb635e886dba779f

    SHA512

    691d6e0e3a034bc5ac8a945ae6b39779c25adf36104de08eb92cc51162db6dd0921d3dd3d632f77fdba38f3b7678e1bd5bc0cd317eb22b037e276fb2befb8641

  • memory/1972-2-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/1972-0-0x00007FFE024B3000-0x00007FFE024B5000-memory.dmp

    Filesize

    8KB

  • memory/1972-37-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/1972-32-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/1972-31-0x00007FFE024B3000-0x00007FFE024B5000-memory.dmp

    Filesize

    8KB

  • memory/1972-1-0x00000000005A0000-0x00000000005BC000-memory.dmp

    Filesize

    112KB

  • memory/3144-13-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/3144-19-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/3144-16-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/3144-15-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/3144-14-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/3144-3-0x00007FFE024B0000-0x00007FFE02F72000-memory.dmp

    Filesize

    10.8MB

  • memory/3144-12-0x00000132BCC20000-0x00000132BCC42000-memory.dmp

    Filesize

    136KB