Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-11-2024 20:03

General

  • Target

    Output.exe

  • Size

    3.3MB

  • MD5

    631c497597c5c12304d528b24ccc31df

  • SHA1

    9da881cd6797e4e8646de4df60eea73ae45c3133

  • SHA256

    239584ed2b45abd89565c75968a8ca7d0624b2df851463f80a485e1efc04d9e4

  • SHA512

    35a6bb13ff373aebb2a6fc080ea0f69e968fbef3441ce7f69604e5f97645ae9e6feb95bad1058fa58f8e652dcc2befd6464d9f62d707d8115c743c57a912957e

  • SSDEEP

    98304:gm7q1K/hJp6SjJjtPzGhHzKIfx+ceJpTYZ:x7q1Irp9jltPahVfx+ceJtYZ

Malware Config

Extracted

Family

xworm

Version

5.0

C2

testarosa.duckdns.org:7119

Mutex

Ljk1RFh4f0rbZvhE

Attributes
  • Install_directory

    %Temp%

  • install_file

    Realtec.exe

aes.plain

Extracted

Family

xworm

C2

147.185.221.23:25808

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    Realtek HD Audio Universal Service.exe

Signatures

  • Detect Xworm Payload 4 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 8 IoCs

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

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 6 IoCs
  • Adds Run key to start application 2 TTPs 2 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).

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • NSIS installer 2 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • 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 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 13 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 27 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\Output.exe
    "C:\Users\Admin\AppData\Local\Temp\Output.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1932
    • C:\Users\Admin\AppData\Roaming\SAM X222C#.exe
      "C:\Users\Admin\AppData\Roaming\SAM X222C#.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4848
      • C:\Users\Admin\AppData\Local\Temp\Realtek HD Audio Universal Service.exe
        "C:\Users\Admin\AppData\Local\Temp\Realtek HD Audio Universal Service.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3212
        • 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\Realtek HD Audio Universal Service.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4100
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Realtek HD Audio Universal Service.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3924
        • 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\Realtek HD Audio Universal Service.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4280
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Realtek HD Audio Universal Service.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2784
      • C:\Users\Admin\AppData\Local\Temp\SAM X222C#.exe
        "C:\Users\Admin\AppData\Local\Temp\SAM X222C#.exe"
        3⤵
        • Executes dropped EXE
        • Enumerates system info in registry
        • Suspicious use of AdjustPrivilegeToken
        PID:628
    • C:\Users\Admin\AppData\Roaming\Realtek.exe
      "C:\Users\Admin\AppData\Roaming\Realtek.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3452
      • 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\Realtek.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:224
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Realtek.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:544
      • 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\Realtec.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3976
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Realtec.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3312
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Realtec" /tr "C:\Users\Admin\AppData\Local\Temp\Realtec.exe"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1056
  • C:\Users\Admin\AppData\Local\Temp\Realtec.exe
    C:\Users\Admin\AppData\Local\Temp\Realtec.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4344
  • C:\Users\Admin\AppData\Local\Temp\Realtec.exe
    C:\Users\Admin\AppData\Local\Temp\Realtec.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3952

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    04114c0529b116bf66d764ff6a5a8fe3

    SHA1

    0caeff17d1b2190f76c9bf539105f6c40c92bd14

    SHA256

    fd7092b4e273314186bad6ce71aa4cd69450736b6ec6cc746868997ff82a7532

    SHA512

    6a718c330824346606ef24f71cca6be0bfafc626b1d2b060b36e919ab07f3d6a345f56cace8a5a84ffbe2183976eb197842c9fd2f3e3b8c8dd307057d59d6f26

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

    Filesize

    944B

    MD5

    da5c82b0e070047f7377042d08093ff4

    SHA1

    89d05987cd60828cca516c5c40c18935c35e8bd3

    SHA256

    77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

    SHA512

    7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

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

    Filesize

    944B

    MD5

    77d622bb1a5b250869a3238b9bc1402b

    SHA1

    d47f4003c2554b9dfc4c16f22460b331886b191b

    SHA256

    f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

    SHA512

    d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

    Filesize

    944B

    MD5

    b51dc9e5ec3c97f72b4ca9488bbb4462

    SHA1

    5c1e8c0b728cd124edcacefb399bbd5e25b21bd3

    SHA256

    976f9534aa2976c85c2455bdde786a3f55d63aefdd40942eba1223c4c93590db

    SHA512

    0e5aa6cf64c535aefb833e5757b68e1094c87424abe2615a7d7d26b1b31eff358d12e36e75ca57fd690a9919b776600bf4c5c0e5a5df55366ba62238bdf3f280

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

    Filesize

    944B

    MD5

    5420c3e24f5090ed2c6388377410d8bc

    SHA1

    036328774b9b4b81ed954615c2045000b3281ae5

    SHA256

    45acb58181e9bcf1529ebe7436a69e29ed5571c6ebe6f33f1062a208f83f6a4f

    SHA512

    b043dfa14daf331e0e77c570131e3d00b5cf0db6375b6ba5cce836cfe7259d1c02d0897d9b438cde515bb0400d2b9107ddf8843554d6e4703d5f59def2ffc3df

  • C:\Users\Admin\AppData\Local\Temp\Realtek HD Audio Universal Service.exe

    Filesize

    79KB

    MD5

    066d90fb1d671648842a3b46622eb7ce

    SHA1

    6d0949bd4f494c9f8d80b705a79cfa9038c80e51

    SHA256

    8d2cf02c3005fb4bb7058df1f3a2e24b98077a8c5a8aab5c8184f4aa9ed951d8

    SHA512

    b22c8910e501de5fcb8e6197552396285366c9b43c4c6df4387b95a28830bf13a6ce634aadbf79e71b83879d19132c63414da5c5059edaa33be6bb71cee32745

  • C:\Users\Admin\AppData\Local\Temp\SAM X222C#.exe

    Filesize

    3.7MB

    MD5

    ad991add5af431b8d808cf9035a5cd46

    SHA1

    d7ac382fa834529219db1b76e4d928ff24f1245b

    SHA256

    a1dfdf32f2a82156bb3007896a9672fa05aba8ce4c668c3f4dce449a1a811a19

    SHA512

    b876e8380ab97dade3f875a7e0cee2dc598ba55143921bdd1f1d9d2d5be55c25d62b12aaef424227e1450f6ddf67a4e04e3f4fc846182abb842c4c821997cbbd

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gfr0ef4e.kfi.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    39KB

    MD5

    27794afa5d5c5cf091e80de14bdb218a

    SHA1

    ec07edcd5c705ae72a7d477f0ffeb867ea7eb5db

    SHA256

    502c51b32b810e755b91cfd9a11230f6e0bf3baceda87f527f4ccc555aac9946

    SHA512

    667de7a923e39214db1f40175984832098b4a75869c145888536e21ec1fa6a36777e5c0b6d89669611377b19b04b8c818fdb05a2db1c94ab135bc796167a2491

  • C:\Users\Admin\AppData\Roaming\SAM X222C#.exe

    Filesize

    3.3MB

    MD5

    918951c4657e9cdf39ac1b275bfd2e95

    SHA1

    7323e59b2c4d60b6639bfcba11f4c02bcb94e347

    SHA256

    b50d25c24ba5f1f096e883b3a9970d2c080afb37dfe2f55a25a1c7ed3ca36505

    SHA512

    438c7554d8b72db63d598085b2c6fae9bfa1895154ebbaf96a5d2a498459b9a3516611613515f04dbc198edb8b2d7ce2ce63975064f28af63f3efa1e50e3e0d7

  • memory/224-55-0x000002A272570000-0x000002A272592000-memory.dmp

    Filesize

    136KB

  • memory/628-48-0x000001A0DF890000-0x000001A0DF8A2000-memory.dmp

    Filesize

    72KB

  • memory/628-49-0x000001A0F8380000-0x000001A0F8594000-memory.dmp

    Filesize

    2.1MB

  • memory/628-74-0x000001A0F8FA0000-0x000001A0F8FDC000-memory.dmp

    Filesize

    240KB

  • memory/628-47-0x000001A0DD930000-0x000001A0DDCF4000-memory.dmp

    Filesize

    3.8MB

  • memory/1932-0-0x00007FFFD21D3000-0x00007FFFD21D5000-memory.dmp

    Filesize

    8KB

  • memory/1932-1-0x00000000000C0000-0x000000000041C000-memory.dmp

    Filesize

    3.4MB

  • memory/3212-45-0x0000000000DB0000-0x0000000000DCA000-memory.dmp

    Filesize

    104KB

  • memory/3452-25-0x00007FFFD21D0000-0x00007FFFD2C91000-memory.dmp

    Filesize

    10.8MB

  • memory/3452-24-0x00000000007B0000-0x00000000007C0000-memory.dmp

    Filesize

    64KB

  • memory/3452-146-0x00007FFFD21D0000-0x00007FFFD2C91000-memory.dmp

    Filesize

    10.8MB