Resubmissions

21-01-2025 17:35

250121-v5yxcavmay 10

21-01-2025 17:33

250121-v5a6aavqhm 10

Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20250113-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20250113-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    21-01-2025 17:33

General

  • Target

    Test7000.exe

  • Size

    39KB

  • MD5

    ec823d617d239ce10f01656b18c5d0e4

  • SHA1

    8f17296536c4096ec178aeea963d620210e6d3d2

  • SHA256

    fdc5bfbfef816556a6538fc3a59163a2ff77aedc3fc146285612067ce5cacdca

  • SHA512

    635a8f2ae11899e91a7a46b5ec87ee5efab98878fe8b3fc22e9d8d20e7a3d88e0cd75ce190f1503ad1ac1c331944086b639e2657aabd55055e6fe3dc7eed2bf1

  • SSDEEP

    768:yftYec/H/fCfTvQ5hxx3CAFWPG9EW6OOwhWQmO6i:yftYecXKf2RFv9EW6OOwY5Od

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

BFonurWjZ07Ruqo3

Attributes
  • Install_directory

    %AppData%

  • install_file

    svchost.exe

  • pastebin_url

    https://pastebin.com/raw/F9G6bgDh

aes.plain

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • 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 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 44 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 37 IoCs
  • Suspicious use of SendNotifyMessage 37 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\Test7000.exe
    "C:\Users\Admin\AppData\Local\Temp\Test7000.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3292
    • 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\Test7000.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2724
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Test7000.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3276
    • 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\svchost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3972
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:3908
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4224
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:4348
  • C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    1⤵
    • Executes dropped EXE
    PID:4700
  • C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    1⤵
    • Executes dropped EXE
    PID:3032

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

    3KB

    MD5

    3eb3833f769dd890afc295b977eab4b4

    SHA1

    e857649b037939602c72ad003e5d3698695f436f

    SHA256

    c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

    SHA512

    c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

    Filesize

    654B

    MD5

    11c6e74f0561678d2cf7fc075a6cc00c

    SHA1

    535ee79ba978554abcb98c566235805e7ea18490

    SHA256

    d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

    SHA512

    32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

    Filesize

    1KB

    MD5

    60b3262c3163ee3d466199160b9ed07d

    SHA1

    994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

    SHA256

    e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

    SHA512

    081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

    Filesize

    1KB

    MD5

    ddfe00947873a3379f5a54112681a8b6

    SHA1

    c18b3a9a337b6378c05df10031bce0c140afe9cb

    SHA256

    6f85f6463e8abdb2b4022736efd008fc1c4ef65af598ba0d5f8539cd97ccd443

    SHA512

    4cff096866ad9d7078375267f9e16f5d9e7d46b59a7d2e9a86a3fdd3b42099a4ee1e36da722075ab76e05acfdf2108de80e9f65b296266d8109bedced3d3db6d

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

    Filesize

    1KB

    MD5

    34a048275e971e9356b1ace4d6e861af

    SHA1

    7b78ad270a07d55b6801727958244ae4c5f65d8b

    SHA256

    5852881c67d7b92d0a79eba756d4ea1e883ca0753af9207a44978fc45cbe9b43

    SHA512

    e918134552d8c5202c6aa58099b26900e604d7f661d7fab8fb26ae39cd98fedc4a44f99e1f0ad8c15a143b3991ab582cf8f13732bcd61be2c0ede443b56ad17e

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_thfp2ptc.wlq.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk

    Filesize

    771B

    MD5

    3d9e3dc89823c4c0b6724cc4e4e6b467

    SHA1

    56380f3f2ef27daaf9d809d833bc63873198f56d

    SHA256

    041917a3fc9cbcd4d5fa066eae1ea170a139bea5153e06a4b5830cd3d7de1a76

    SHA512

    55c1e4842b9bd8579f63822e3757cdd029a8592abd60a0f6fdc9c4dea6ab60508bca09af5f306480bf0db1a70904bd7e12a2d99e93cee3dd19632cd8b391acc3

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

    Filesize

    39KB

    MD5

    ec823d617d239ce10f01656b18c5d0e4

    SHA1

    8f17296536c4096ec178aeea963d620210e6d3d2

    SHA256

    fdc5bfbfef816556a6538fc3a59163a2ff77aedc3fc146285612067ce5cacdca

    SHA512

    635a8f2ae11899e91a7a46b5ec87ee5efab98878fe8b3fc22e9d8d20e7a3d88e0cd75ce190f1503ad1ac1c331944086b639e2657aabd55055e6fe3dc7eed2bf1

  • memory/2724-15-0x00007FFB3DE70000-0x00007FFB3E932000-memory.dmp

    Filesize

    10.8MB

  • memory/2724-12-0x00007FFB3DE70000-0x00007FFB3E932000-memory.dmp

    Filesize

    10.8MB

  • memory/2724-16-0x00007FFB3DE70000-0x00007FFB3E932000-memory.dmp

    Filesize

    10.8MB

  • memory/2724-14-0x00007FFB3DE70000-0x00007FFB3E932000-memory.dmp

    Filesize

    10.8MB

  • memory/2724-13-0x00007FFB3DE70000-0x00007FFB3E932000-memory.dmp

    Filesize

    10.8MB

  • memory/2724-19-0x00007FFB3DE70000-0x00007FFB3E932000-memory.dmp

    Filesize

    10.8MB

  • memory/2724-2-0x000002672D570000-0x000002672D592000-memory.dmp

    Filesize

    136KB

  • memory/3292-0-0x00007FFB3DE73000-0x00007FFB3DE75000-memory.dmp

    Filesize

    8KB

  • memory/3292-31-0x00007FFB3DE73000-0x00007FFB3DE75000-memory.dmp

    Filesize

    8KB

  • memory/3292-60-0x00007FFB3DE70000-0x00007FFB3E932000-memory.dmp

    Filesize

    10.8MB

  • memory/3292-61-0x00007FFB3DE70000-0x00007FFB3E932000-memory.dmp

    Filesize

    10.8MB

  • memory/3292-1-0x0000000000970000-0x0000000000980000-memory.dmp

    Filesize

    64KB

  • memory/3908-55-0x0000028C66E70000-0x0000028C6708D000-memory.dmp

    Filesize

    2.1MB

  • memory/4348-63-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-74-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-73-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-72-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-71-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-70-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-69-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-68-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-62-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB

  • memory/4348-64-0x00000147F0990000-0x00000147F0991000-memory.dmp

    Filesize

    4KB