Resubmissions

05/03/2024, 13:26

240305-qpl6dsfg8y

04/03/2024, 20:28

240304-y89d2acd8w10

Analysis

  • max time kernel
    299s
  • max time network
    299s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/03/2024, 20:28

General

  • Target
    XClient.exe
  • Size 38KB
  • Sample240304-y89d2acd8w
  • SHA256 f3f68266726abc9e9fe6c2e9f2170721343c8359d44b169ebd8818cd60eaad14
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

Version
  • 5.0

C2
  • 16.ip.gl.ply.gg:52773

Mutex
  • MYba773WdMHAeUFl

Attributes
  • Install_directory

    %AppData%

  • install_file

    taskhost.exe

aes.plain

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 9 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.

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of WriteProcessMemory 21 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⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3248
    • 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⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1464
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3460
    • 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\taskhost.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1116
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'taskhost.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3376
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "taskhost" /tr "C:\Users\Admin\AppData\Roaming\taskhost.exe"
      2⤵
      • Creates scheduled task(s)
      PID:4568
    • C:\Users\Admin\AppData\Local\Temp\vwkpdd.exe
      "C:\Users\Admin\AppData\Local\Temp\vwkpdd.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3496
      • C:\Users\Admin\AppData\Local\Temp\crazyinvers.exe
        "C:\Users\Admin\AppData\Local\Temp\crazyinvers.exe"
        3⤵
        • Executes dropped EXE
        PID:3012
      • C:\Users\Admin\AppData\Local\Temp\TEXT.exe
        "C:\Users\Admin\AppData\Local\Temp\TEXT.exe"
        3⤵
        • Executes dropped EXE
        PID:3788
      • C:\Users\Admin\AppData\Local\Temp\OOPS.exe
        "C:\Users\Admin\AppData\Local\Temp\OOPS.exe"
        3⤵
        • Executes dropped EXE
        PID:4356
  • C:\Users\Admin\AppData\Roaming\taskhost.exe
    C:\Users\Admin\AppData\Roaming\taskhost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4768
  • C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\DIE_4.txt
    1⤵
    • Opens file in notepad (likely ransom note)
    PID:2996
  • C:\Users\Admin\AppData\Roaming\taskhost.exe
    C:\Users\Admin\AppData\Roaming\taskhost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4700
  • C:\Users\Admin\AppData\Roaming\taskhost.exe
    C:\Users\Admin\AppData\Roaming\taskhost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3172
  • C:\Users\Admin\AppData\Roaming\taskhost.exe
    C:\Users\Admin\AppData\Roaming\taskhost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3560
  • C:\Users\Admin\AppData\Roaming\taskhost.exe
    C:\Users\Admin\AppData\Roaming\taskhost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2536

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        DIE_5.exe

        • Path C:\DIE_5.exe
        • Size 640KB
        • SHA256 ff6335069b6e140eb47149d847aea80bf7e2b06bd80ae9708aa382efb3ae21ee
        • MD5 SHA1 SHA512 SSDEEP

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 2KB
        • SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
        • MD5 SHA1 SHA512

        taskhost.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\taskhost.exe.log
        • Size 654B
        • SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 2987e99ec7fa17bd4ab7de3cb4dc62645e1052012a5a357904d6fc6db9054147
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 d02e76fb112f578e455d6eb4fef7904cc1b318f4c554441eac5b68a62ae58bc4
        • MD5 SHA1 SHA512

        OOPS.exe

        • Path C:\Users\Admin\AppData\Local\Temp\OOPS.exe
        • Size 5KB
        • SHA256 40293703c2c00b2c9ccb6d28933756c995186ceefb786ea7aa504b5f89ac920d
        • MD5 SHA1 SHA512 SSDEEP

        TEXT.exe

        • Path C:\Users\Admin\AppData\Local\Temp\TEXT.exe
        • Size 5KB
        • SHA256 cda81c2a0f08bfd2bcf6c11a126bcc28c1286a6fdc1368a6f1df9f09b44812d2
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_s5pnpxyk.chy.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_s5pnpxyk.chy.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        crazyinvers.exe

        • Path C:\Users\Admin\AppData\Local\Temp\crazyinvers.exe
        • Size 2.3MB
        • SHA256 47f0e9a90d45b193e81d3e60b7a43e5a4550a07a3dd1f7c98110fde12265d999
        • MD5 SHA1 SHA512 SSDEEP

        vwkpdd.exe

        • Path C:\Users\Admin\AppData\Local\Temp\vwkpdd.exe
        • Size 706KB
        • SHA256 c4be02ebea91f47eb66c4c247347b1fdea520b3210b56c619b9128b5a996fcdd
        • MD5 SHA1 SHA512 SSDEEP

        taskhost.exe

        • Path C:\Users\Admin\AppData\Roaming\taskhost.exe
        • Size 38KB
        • SHA256 f3f68266726abc9e9fe6c2e9f2170721343c8359d44b169ebd8818cd60eaad14
        • MD5 SHA1 SHA512 SSDEEP

        DIE_5.txt

        • Path C:\Users\Admin\Desktop\DIE_5.txt
        • Size 26B
        • SHA256 1c746f23a9ae7e24d8bad9b1814aea9a2379985dd954e42b91b10de1c1115e04
        • MD5 SHA1 SHA512

        memory/1116-44-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/1116-48-0x00000201F3B10000-0x00000201F3B20000-memory.dmp

        memory/1116-49-0x00000201F3B10000-0x00000201F3B20000-memory.dmp

        memory/1116-51-0x00000201F3B10000-0x00000201F3B20000-memory.dmp

        memory/1116-53-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/1464-14-0x000001C0DB8E0000-0x000001C0DB8F0000-memory.dmp

        memory/1464-12-0x000001C0C3350000-0x000001C0C3372000-memory.dmp

        memory/1464-13-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/1464-19-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/1464-16-0x000001C0DB8E0000-0x000001C0DB8F0000-memory.dmp

        memory/1464-15-0x000001C0DB8E0000-0x000001C0DB8F0000-memory.dmp

        memory/2536-6662-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/2536-6642-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3012-536-0x0000000000400000-0x0000000000582000-memory.dmp

        memory/3172-3364-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3172-3529-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3248-0-0x0000000000A10000-0x0000000000A20000-memory.dmp

        memory/3248-37-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3248-2-0x000000001B7A0000-0x000000001B7B0000-memory.dmp

        memory/3248-1-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3376-68-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3376-65-0x00000297A92C0000-0x00000297A92D0000-memory.dmp

        memory/3376-64-0x00000297A92C0000-0x00000297A92D0000-memory.dmp

        memory/3376-63-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3460-34-0x00000245DA340000-0x00000245DA350000-memory.dmp

        memory/3460-21-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3460-22-0x00000245DA340000-0x00000245DA350000-memory.dmp

        memory/3460-23-0x00000245DA340000-0x00000245DA350000-memory.dmp

        memory/3460-36-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3496-89-0x0000000000D20000-0x0000000000DD6000-memory.dmp

        memory/3496-124-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3496-91-0x000000001BDF0000-0x000000001BE00000-memory.dmp

        memory/3496-90-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3560-4974-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3560-5400-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/3788-353-0x0000000074530000-0x0000000074CE0000-memory.dmp

        memory/3788-128-0x0000000074530000-0x0000000074CE0000-memory.dmp

        memory/3788-126-0x0000000000640000-0x0000000000648000-memory.dmp

        memory/4356-1259-0x0000000074530000-0x0000000074CE0000-memory.dmp

        memory/4356-134-0x0000000074530000-0x0000000074CE0000-memory.dmp

        memory/4356-127-0x00000000004F0000-0x00000000004F8000-memory.dmp

        memory/4356-6660-0x0000000074530000-0x0000000074CE0000-memory.dmp

        memory/4700-1392-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/4700-1545-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/4768-77-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp

        memory/4768-75-0x00007FFD55430000-0x00007FFD55EF1000-memory.dmp