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Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/04/2024, 03:08

General

  • Target

    z842jxn2/z872jxn2.exe

  • Size

    69KB

  • MD5

    96d20619f6fca9f8ce04ee826bd49a1a

  • SHA1

    bbbb18c9c4a38dad5ce8cdc4dfc7bced7fa545e7

  • SHA256

    8df2b4dae2428156b659ae3e080ee5bbb71ef51c26eb90341b23ebce1217ac48

  • SHA512

    e21ef50bb1a94005ad42047c4f4ecafc5eaf56ff0ca682d79acaa885ed1f50cd1666ac98e7f111ab8879e8957ca982d2143613a12ae554308287cea901da8dca

  • SSDEEP

    1536:4piY3bmV6IfVQitW8n8aWPbQ40UqlSIgg6vgaOgy6x3c:uV3bmrfVQitX0bQ43IgROgy65c

Malware Config

Extracted

Family

xworm

C2

195.35.2.168:7000

86.29.59.189:7000

72.59.79.119:7000

52.12.52.167:7000

16.39.62.122:7000

Attributes
  • Install_directory

    %Public%

  • install_file

    USB.exe

  • telegram

    https://api.telegram.org/bot7082635030:AAGxz6qjNlJ3WqLSL0ZicFOCA9YHE32yRzQ/sendMessage?chat_id=6484754327

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • 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
  • 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 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\z842jxn2\z872jxn2.exe
    "C:\Users\Admin\AppData\Local\Temp\z842jxn2\z872jxn2.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3600
    • 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\z842jxn2\z872jxn2.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3968
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'z872jxn2.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4112
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\FileExplore'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1032
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'FileExplore'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4900
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "FileExplore" /tr "C:\Users\Public\FileExplore"
      2⤵
      • Creates scheduled task(s)
      PID:3512
  • C:\Users\Public\FileExplore
    C:\Users\Public\FileExplore
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3112
  • C:\Users\Public\FileExplore
    C:\Users\Public\FileExplore
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3800

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    654B

    MD5

    2ff39f6c7249774be85fd60a8f9a245e

    SHA1

    684ff36b31aedc1e587c8496c02722c6698c1c4e

    SHA256

    e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

    SHA512

    1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

  • 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

    731e9e4becec0b1ef9caad4b3562d4b4

    SHA1

    6dffb77aba4e92ad5bd4b7c02fdee6f328bcd457

    SHA256

    71c7eca538938fa4d5b470fee41cfe43734e9beb9ae409d5b41111fa1a15c2d5

    SHA512

    841cf559ae5b0feec4be43018717641399b3602a553112e98b07d498f1a44169924466abc7e2313b8e8cf1c0fdc1bb7635e2818aab8269b0ef349a0ba0cd6ae5

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

    Filesize

    944B

    MD5

    eb1ad317bd25b55b2bbdce8a28a74a94

    SHA1

    98a3978be4d10d62e7411946474579ee5bdc5ea6

    SHA256

    9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

    SHA512

    d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

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

    Filesize

    944B

    MD5

    4e9501355f9b9c29f3e513dd16bccd0f

    SHA1

    aafec5955d615aebe241e9f4103ead5cbc213b57

    SHA256

    febe8c795e0d64ebcc0f2d2394e58ce20c30a23991c8196c65b604581b5d2fa4

    SHA512

    06d9a546a6a250e86d689fb46c46a6f5df374caab0ad8b7914186b696a8891ba2c0dd4f0e67fdd7f60b539d8b20a44df5fecf792bc15f5e05ebb3d5604afa7ca

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_c1ra0cl4.shi.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Public\FileExplore

    Filesize

    69KB

    MD5

    96d20619f6fca9f8ce04ee826bd49a1a

    SHA1

    bbbb18c9c4a38dad5ce8cdc4dfc7bced7fa545e7

    SHA256

    8df2b4dae2428156b659ae3e080ee5bbb71ef51c26eb90341b23ebce1217ac48

    SHA512

    e21ef50bb1a94005ad42047c4f4ecafc5eaf56ff0ca682d79acaa885ed1f50cd1666ac98e7f111ab8879e8957ca982d2143613a12ae554308287cea901da8dca

  • memory/1032-51-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/1032-50-0x000002341F4D0000-0x000002341F6EC000-memory.dmp

    Filesize

    2.1MB

  • memory/1032-48-0x0000023406EC0000-0x0000023406ED0000-memory.dmp

    Filesize

    64KB

  • memory/1032-47-0x0000023406EC0000-0x0000023406ED0000-memory.dmp

    Filesize

    64KB

  • memory/1032-46-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3112-76-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3112-74-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3600-2-0x000000001B890000-0x000000001B8A0000-memory.dmp

    Filesize

    64KB

  • memory/3600-70-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3600-1-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3600-71-0x000000001B890000-0x000000001B8A0000-memory.dmp

    Filesize

    64KB

  • memory/3600-0-0x0000000000C40000-0x0000000000C58000-memory.dmp

    Filesize

    96KB

  • memory/3800-81-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3800-80-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3968-18-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3968-17-0x000001C899BC0000-0x000001C899DDC000-memory.dmp

    Filesize

    2.1MB

  • memory/3968-3-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/3968-4-0x000001C899B40000-0x000001C899B50000-memory.dmp

    Filesize

    64KB

  • memory/3968-5-0x000001C8FFD60000-0x000001C8FFD82000-memory.dmp

    Filesize

    136KB

  • memory/4112-35-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/4112-34-0x0000025F67980000-0x0000025F67B9C000-memory.dmp

    Filesize

    2.1MB

  • memory/4112-31-0x0000025F4F210000-0x0000025F4F220000-memory.dmp

    Filesize

    64KB

  • memory/4112-20-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/4112-21-0x0000025F4F210000-0x0000025F4F220000-memory.dmp

    Filesize

    64KB

  • memory/4900-66-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/4900-57-0x00007FFDCDD80000-0x00007FFDCE841000-memory.dmp

    Filesize

    10.8MB

  • memory/4900-63-0x0000022576470000-0x0000022576480000-memory.dmp

    Filesize

    64KB

  • memory/4900-62-0x0000022576470000-0x0000022576480000-memory.dmp

    Filesize

    64KB