Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-05-2024 02:32

General

  • Target

    c1130543ef2f5093477fc0f719d889445cbddf096494122a64f268aeb9a2d783.exe

  • Size

    276KB

  • MD5

    9f14aa0555e80190fe99817d0b3ae058

  • SHA1

    d5b77274a0d5cb8a3b17d12b26e8fb48914c6d98

  • SHA256

    c1130543ef2f5093477fc0f719d889445cbddf096494122a64f268aeb9a2d783

  • SHA512

    88ea107c23eb017d8dae25d57402a11ccc2660d4860259f40820676aebeef1df920e25d1280eeca5cc24a249d8f654211c752c7ed64399f5d07ef160c6c238e7

  • SSDEEP

    6144:zrMRFSb7IdaHvbp/yYtgE6dWltqvMJAF0tWcTPEt8:HMrSbcdgd6YtgP0iU78

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

  • pastebin_url

    https://pastebin.com/raw/819HpC9S

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Detects Windows executables referencing non-Windows User-Agents 2 IoCs
  • 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.

  • 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 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 5 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: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 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\c1130543ef2f5093477fc0f719d889445cbddf096494122a64f268aeb9a2d783.exe
    "C:\Users\Admin\AppData\Local\Temp\c1130543ef2f5093477fc0f719d889445cbddf096494122a64f268aeb9a2d783.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:5012
    • 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\c1130543ef2f5093477fc0f719d889445cbddf096494122a64f268aeb9a2d783.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3268
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'c1130543ef2f5093477fc0f719d889445cbddf096494122a64f268aeb9a2d783.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4848
    • 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\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2796
    • 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:4012
    • 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\Roaming\XClient.exe"
      2⤵
      • Creates scheduled task(s)
      PID:4140
  • C:\Users\Admin\AppData\Roaming\XClient.exe
    C:\Users\Admin\AppData\Roaming\XClient.exe
    1⤵
    • Executes dropped EXE
    PID:3804
  • C:\Users\Admin\AppData\Roaming\XClient.exe
    C:\Users\Admin\AppData\Roaming\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1560
  • C:\Users\Admin\AppData\Roaming\XClient.exe
    C:\Users\Admin\AppData\Roaming\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:392

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

    d85ba6ff808d9e5444a4b369f5bc2730

    SHA1

    31aa9d96590fff6981b315e0b391b575e4c0804a

    SHA256

    84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

    SHA512

    8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

    Filesize

    944B

    MD5

    6d3e9c29fe44e90aae6ed30ccf799ca8

    SHA1

    c7974ef72264bbdf13a2793ccf1aed11bc565dce

    SHA256

    2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

    SHA512

    60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

    Filesize

    944B

    MD5

    51cf8df21f531e31f7740b4ec487a48a

    SHA1

    40c6a73b22d71625a62df109aefc92a5f9b9d13e

    SHA256

    263d9b98a897d1d66da4832af640c4bf5ab0ae91125ba12243453dfe714f3d0d

    SHA512

    57a85461f6ea96b26a8b53d3a9cca18543e4ddbe996e8f412fc4cf7cf6e9ffe558c96da7b322a42f18bef62020e65aee119bed6102f75e2f605df09b02ec6368

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

    Filesize

    944B

    MD5

    be67063c62a242565760a02a642a9f02

    SHA1

    d1043a892b44d6676f71b568f578fff947266a19

    SHA256

    56f158298dc5f781d6636a0b15d040f9cffb1d46cd11079aa40a26b662217f48

    SHA512

    90d2cbd882ff8043412ad25e74df0cf6b71d6f3fbdfa6f1efa0efc8eed86a925606c7d2e967f112a34d3f0e04f01a396898508571400dcf7e6fd69e78f406638

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ydkrwjhz.uj4.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    276KB

    MD5

    9f14aa0555e80190fe99817d0b3ae058

    SHA1

    d5b77274a0d5cb8a3b17d12b26e8fb48914c6d98

    SHA256

    c1130543ef2f5093477fc0f719d889445cbddf096494122a64f268aeb9a2d783

    SHA512

    88ea107c23eb017d8dae25d57402a11ccc2660d4860259f40820676aebeef1df920e25d1280eeca5cc24a249d8f654211c752c7ed64399f5d07ef160c6c238e7

  • memory/3268-10-0x00007FFA22850000-0x00007FFA23311000-memory.dmp

    Filesize

    10.8MB

  • memory/3268-15-0x00007FFA22850000-0x00007FFA23311000-memory.dmp

    Filesize

    10.8MB

  • memory/3268-18-0x00007FFA22850000-0x00007FFA23311000-memory.dmp

    Filesize

    10.8MB

  • memory/3268-9-0x000001D8DAA80000-0x000001D8DAAA2000-memory.dmp

    Filesize

    136KB

  • memory/3268-3-0x00007FFA22850000-0x00007FFA23311000-memory.dmp

    Filesize

    10.8MB

  • memory/5012-0-0x00007FFA22853000-0x00007FFA22855000-memory.dmp

    Filesize

    8KB

  • memory/5012-2-0x00007FFA22850000-0x00007FFA23311000-memory.dmp

    Filesize

    10.8MB

  • memory/5012-1-0x0000000000570000-0x00000000005BA000-memory.dmp

    Filesize

    296KB

  • memory/5012-58-0x00007FFA22853000-0x00007FFA22855000-memory.dmp

    Filesize

    8KB

  • memory/5012-59-0x00007FFA22850000-0x00007FFA23311000-memory.dmp

    Filesize

    10.8MB