Analysis

  • max time kernel
    453s
  • max time network
    1172s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-06-2024 17:49

General

  • Target

    portmap.exe

  • Size

    37KB

  • MD5

    65bdfee5e4d9099b10d35fd68a9b44cb

  • SHA1

    20f380d3064186587069464becedadae24ad305a

  • SHA256

    39ca4ba8dd7b0324302767752719eb5198b5cc52dcb14d05a3dbd0756fc543f9

  • SHA512

    69350a193ab4c9d2ba6629f2265fff4f3e21e074ec3b02b5a972c9af21724af12aad669834677c7b9ae6d4c96a74044f04e95570643393cda80130febbc09186

  • SSDEEP

    768:k5gTXwbLsAheofRhOUOe9tLFyc9PwO/h4Dy0I:k5gTgUAhHLOSF39PwO/T0I

Malware Config

Extracted

Family

xworm

Version

5.0

C2

Jamalhacker-53065.portmap.io:53065

Mutex

aJRZ58IZ9NkkHbDV

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    USB.exe

aes.plain

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 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).

  • Delays execution with timeout.exe 1 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 use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 8 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\portmap.exe
    "C:\Users\Admin\AppData\Local\Temp\portmap.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4840
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows backup" /tr "C:\Users\Admin\Windows backup"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2440
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /delete /f /tn "Windows backup"
      2⤵
        PID:1188
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAF5A.tmp.bat""
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2940
        • C:\Windows\system32\timeout.exe
          timeout 3
          3⤵
          • Delays execution with timeout.exe
          PID:2836
    • C:\Users\Admin\Windows backup
      "C:\Users\Admin\Windows backup"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1516

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpAF5A.tmp.bat

      Filesize

      159B

      MD5

      d869ea8606472ff08137ad940a234bbc

      SHA1

      6c02da5e608465ed5015a84cb9f6bef45df6f5f0

      SHA256

      ca587e9b3bea722e3f839b691f8f3dd817fc59f450aaf1af73097f2b09c4a66c

      SHA512

      806110fbb79b5d762cc2e740e16ca56ba5fcca58760d2bd084a4c598c59f2176308e4f173853deacad232b2c6aa6db528c2f32e957eb9169d6512bf7cd7011a4

    • C:\Users\Admin\Windows backup

      Filesize

      37KB

      MD5

      65bdfee5e4d9099b10d35fd68a9b44cb

      SHA1

      20f380d3064186587069464becedadae24ad305a

      SHA256

      39ca4ba8dd7b0324302767752719eb5198b5cc52dcb14d05a3dbd0756fc543f9

      SHA512

      69350a193ab4c9d2ba6629f2265fff4f3e21e074ec3b02b5a972c9af21724af12aad669834677c7b9ae6d4c96a74044f04e95570643393cda80130febbc09186

    • memory/1516-8-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp

      Filesize

      10.8MB

    • memory/1516-10-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp

      Filesize

      10.8MB

    • memory/4840-0-0x00007FFB728F3000-0x00007FFB728F5000-memory.dmp

      Filesize

      8KB

    • memory/4840-1-0x00000000003C0000-0x00000000003D0000-memory.dmp

      Filesize

      64KB

    • memory/4840-2-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp

      Filesize

      10.8MB

    • memory/4840-11-0x000000001C160000-0x000000001C16C000-memory.dmp

      Filesize

      48KB

    • memory/4840-12-0x00007FFB728F3000-0x00007FFB728F5000-memory.dmp

      Filesize

      8KB

    • memory/4840-18-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp

      Filesize

      10.8MB