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Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    26/02/2025, 18:04

General

  • Target

    WinWord.exe

  • Size

    6.9MB

  • MD5

    389390bf696737deedaaf10a90d407d1

  • SHA1

    87758da2fe832f302032e904eb13994c70023825

  • SHA256

    d3f31c512033046c4209c5af1352f3ce36d1af39f84946c22ca3e25da6539734

  • SHA512

    4b1ff3b939a22250222afc6ded49e636b76cc602ea67a587a70dac2deafabf5446f1eb27feb688b3d7759b9b4bcd46f016c8f98b42cba29920045031da6551b0

  • SSDEEP

    196608:I/9sLB5t3JJQGR2nroh1L9cDIw4v6N+ED6JwtPnoDAMzvaqx/D:u6tdJ2rIcIw4vjbJCfoF+KD

Malware Config

Extracted

Family

stealerium

C2

https://discord.com/api/webhooks/1038709348303650857/DLQdA51dlH2mWOgr-jjNC0jvu25-oWapgKwxpsqsFwOSYLm4gQOEdFE6XXg7_sReK0AB

Signatures

  • DarkTrack

    DarkTrack is a remote administration tool written in delphi.

  • DarkTrack payload 10 IoCs
  • Darktrack family
  • Stealerium

    An open source info stealer written in C# first seen in May 2022.

  • Stealerium family
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 3 IoCs
  • Checks BIOS information in registry 2 TTPs 6 IoCs

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

  • Executes dropped EXE 8 IoCs
  • Identifies Wine through registry keys 2 TTPs 3 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Loads dropped DLL 8 IoCs
  • Modifies file permissions 1 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 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.

  • Writes to the Master Boot Record (MBR) 1 TTPs 3 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 17 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\WinWord.exe
    "C:\Users\Admin\AppData\Local\Temp\WinWord.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Loads dropped DLL
    • Checks whether UAC is enabled
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2756
    • C:\Users\Admin\AppData\Local\Temp\Hgmuvfd.exe
      "C:\Users\Admin\AppData\Local\Temp\Hgmuvfd.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Identifies Wine through registry keys
      • Loads dropped DLL
      • Checks whether UAC is enabled
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2652
      • C:\Users\Admin\AppData\Local\Temp\Hgmuvfd.exe
        "C:\Users\Admin\AppData\Local\Temp\Hgmuvfd.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2880
    • C:\Users\Admin\AppData\Local\Temp\Djejga.exe
      "C:\Users\Admin\AppData\Local\Temp\Djejga.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2628
      • C:\Users\Admin\AppData\Local\Temp\Djejga.exe
        "C:\Users\Admin\AppData\Local\Temp\Djejga.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2856
        • C:\Users\Admin\AppData\Roaming\ctfmon.exe
          "C:\Users\Admin\AppData\Roaming\ctfmon.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:2828
          • C:\Users\Admin\AppData\Roaming\ctfmon.exe
            "C:\Users\Admin\AppData\Roaming\ctfmon.exe"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:2740
    • C:\Users\Admin\AppData\Local\Temp\Kgnzgrpvr.exe
      "C:\Users\Admin\AppData\Local\Temp\Kgnzgrpvr.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2180
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c icacls "C:\Users\Admin\AppData\Roaming\Certificates" /inheritance:e /deny "*S-1-1-0:(R,REA,RA,RD)" & icacls "C:\Users\Admin\AppData\Roaming\Certificates" /inheritance:e /deny "*S-1-5-7:(R,REA,RA,RD)" & icacls "C:\Users\Admin\AppData\Roaming\Certificates" /inheritance:e /deny "Admin:(R,REA,RA,RD)"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2444
        • C:\Windows\SysWOW64\icacls.exe
          icacls "C:\Users\Admin\AppData\Roaming\Certificates" /inheritance:e /deny "*S-1-1-0:(R,REA,RA,RD)"
          4⤵
          • Modifies file permissions
          • System Location Discovery: System Language Discovery
          PID:2268
        • C:\Windows\SysWOW64\icacls.exe
          icacls "C:\Users\Admin\AppData\Roaming\Certificates" /inheritance:e /deny "*S-1-5-7:(R,REA,RA,RD)"
          4⤵
          • Modifies file permissions
          • System Location Discovery: System Language Discovery
          PID:1092
        • C:\Windows\SysWOW64\icacls.exe
          icacls "C:\Users\Admin\AppData\Roaming\Certificates" /inheritance:e /deny "Admin:(R,REA,RA,RD)"
          4⤵
          • Modifies file permissions
          • System Location Discovery: System Language Discovery
          PID:1176
    • C:\Users\Admin\AppData\Local\Temp\Lmfekeldirxz.exe
      "C:\Users\Admin\AppData\Local\Temp\Lmfekeldirxz.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Executes dropped EXE
      • Identifies Wine through registry keys
      • Checks whether UAC is enabled
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:536
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpBAE6.tmp.bat
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1996
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:892
        • C:\Windows\SysWOW64\taskkill.exe
          TaskKill /F /IM 536
          4⤵
          • System Location Discovery: System Language Discovery
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:876
        • C:\Windows\SysWOW64\timeout.exe
          Timeout /T 2 /Nobreak
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:1588
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {5A8D14C0-6CE5-4E6B-BEC4-A62F93D9085C} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
    1⤵
      PID:2472

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\mntemp

      Filesize

      16B

      MD5

      636613c40c1b5affc836b6d8608c78f4

      SHA1

      93b49a30a30fe5d44bc2682fa1cd611459fd99db

      SHA256

      d00a935f81c1a3ff358c7cef5783bbbe380287b5ed8a7e87097418bf48eb3be2

      SHA512

      1705d9d593e4c6f173a5f617246fe94bbf44de02e6a940492b60adbb7abec1c32086744440827d6a508bd7baec87f653d59561b4d79a22c1554e686302ba7c68

    • C:\Users\Admin\AppData\Local\Temp\Djejga.exe

      Filesize

      224KB

      MD5

      14bc123a8209f7c21aacea4cd179fbec

      SHA1

      e602df06e8f03dfa99d5234544e93c63f45ab97b

      SHA256

      eeb5a75e3231ee95a2340be3767ca41c3aec92c2d46b90f1d67fdfec0d254f7e

      SHA512

      63b71f24b5876432d80de7eff3a78d40d308baf208566945f6a331f4254aff886a18763d6becc503dda02bfd251588221c9a10a59fd96d495ed4e205d06ad6dd

    • C:\Users\Admin\AppData\Local\Temp\tmpBAE6.tmp.bat

      Filesize

      56B

      MD5

      b57d7c9cc4f2add16780a8503ef17d13

      SHA1

      5b5b436b17e50f485b29d73538637a918625b557

      SHA256

      b5c48fe1a2566eedc56d691330702a338ece96a43a996c3fc566924ab10856aa

      SHA512

      088de4cacba806e00d875c914a652cdd164f8c9a62525a9eab1a374f57aefc599ee841164e1380000971ed5745c14608ad2470868ba491039b7dca04b0df7617

    • \Users\Admin\AppData\Local\Temp\Hgmuvfd.exe

      Filesize

      2.1MB

      MD5

      78d3152616dedb9801ce61015324ae8a

      SHA1

      e8a31f392db771e8ca7759c11de53519a48e0fc0

      SHA256

      98d8fec346fc1865dc8b620f74826f484fe9c0c705dc9d58c5f44df934a01208

      SHA512

      20ab9c27d1b1774859adf5304f10118e63c43db978d6d884aa1deb5c53b1884d5529350a3f0d8fd66b0d99dc19653c431d5f508b0ebc718783bd16083f52daf3

    • \Users\Admin\AppData\Local\Temp\Kgnzgrpvr.exe

      Filesize

      652KB

      MD5

      f9a67d8b903d4c3b27b55d1bfdd5c70c

      SHA1

      d78b8da5b3ffdd55bd30912a36c69d5a5752fa95

      SHA256

      e8b943f45cc37ddc9e594eb3ccc7057820f54939bd9b38b1b3703a14da52e01f

      SHA512

      63d762e4f0fb7302c1731e8e907f2efb207be5ea7f57aa29aad2a34e7c09d0d1976ef429e1668bd0869d2f9c341ac5c1da953725c3cd83cf655875a8cdab90e3

    • \Users\Admin\AppData\Local\Temp\Lmfekeldirxz.exe

      Filesize

      3.0MB

      MD5

      0372cb4f806947727400d1937f3e8063

      SHA1

      89aee134a5226e103f702f434a059c601eebf336

      SHA256

      5f2b46e3cfb853b3be645309ea8378f6535bf7128e0794ff9ab2ef0972554e8a

      SHA512

      b92f743d4fd4101bee6e6a8becba6be698f36ac83a18b0913bf0bc22d8a0ca57ea1bf659936a9398f729ed6b0f323bb437e6a67b4e0d5a79efba0baadf093fe1

    • memory/536-85-0x0000000000B80000-0x0000000001092000-memory.dmp

      Filesize

      5.1MB

    • memory/536-98-0x0000000000B80000-0x0000000001092000-memory.dmp

      Filesize

      5.1MB

    • memory/536-84-0x0000000000B80000-0x0000000001092000-memory.dmp

      Filesize

      5.1MB

    • memory/536-92-0x0000000000B80000-0x0000000001092000-memory.dmp

      Filesize

      5.1MB

    • memory/536-37-0x0000000000B80000-0x0000000001092000-memory.dmp

      Filesize

      5.1MB

    • memory/2180-29-0x0000000000400000-0x0000000000541000-memory.dmp

      Filesize

      1.3MB

    • memory/2180-89-0x0000000000400000-0x0000000000541000-memory.dmp

      Filesize

      1.3MB

    • memory/2628-44-0x00000000005E0000-0x00000000005E8000-memory.dmp

      Filesize

      32KB

    • memory/2628-22-0x00000000011D0000-0x000000000120E000-memory.dmp

      Filesize

      248KB

    • memory/2652-41-0x0000000001220000-0x000000000163E000-memory.dmp

      Filesize

      4.1MB

    • memory/2652-13-0x0000000001220000-0x000000000163E000-memory.dmp

      Filesize

      4.1MB

    • memory/2652-40-0x0000000001220000-0x000000000163E000-memory.dmp

      Filesize

      4.1MB

    • memory/2652-87-0x0000000001220000-0x000000000163E000-memory.dmp

      Filesize

      4.1MB

    • memory/2740-118-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2756-11-0x000000000B050000-0x000000000B46E000-memory.dmp

      Filesize

      4.1MB

    • memory/2756-4-0x0000000000400000-0x0000000000CE0000-memory.dmp

      Filesize

      8.9MB

    • memory/2756-27-0x000000000AA30000-0x000000000AB71000-memory.dmp

      Filesize

      1.3MB

    • memory/2756-1-0x0000000077AF0000-0x0000000077AF2000-memory.dmp

      Filesize

      8KB

    • memory/2756-0-0x0000000000400000-0x0000000000CE0000-memory.dmp

      Filesize

      8.9MB

    • memory/2756-35-0x000000000B050000-0x000000000B562000-memory.dmp

      Filesize

      5.1MB

    • memory/2756-3-0x0000000000402000-0x0000000000986000-memory.dmp

      Filesize

      5.5MB

    • memory/2756-5-0x0000000000400000-0x0000000000CE0000-memory.dmp

      Filesize

      8.9MB

    • memory/2756-43-0x0000000000400000-0x0000000000CE0000-memory.dmp

      Filesize

      8.9MB

    • memory/2828-106-0x0000000000D80000-0x0000000000DBE000-memory.dmp

      Filesize

      248KB

    • memory/2856-77-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2856-73-0x0000000000400000-0x0000000000416000-memory.dmp

      Filesize

      88KB

    • memory/2856-71-0x0000000000400000-0x0000000000416000-memory.dmp

      Filesize

      88KB

    • memory/2856-69-0x0000000000400000-0x0000000000416000-memory.dmp

      Filesize

      88KB

    • memory/2856-67-0x0000000000400000-0x0000000000416000-memory.dmp

      Filesize

      88KB

    • memory/2856-78-0x0000000000400000-0x0000000000416000-memory.dmp

      Filesize

      88KB

    • memory/2856-80-0x0000000000400000-0x0000000000416000-memory.dmp

      Filesize

      88KB

    • memory/2856-75-0x0000000000400000-0x0000000000416000-memory.dmp

      Filesize

      88KB

    • memory/2880-82-0x0000000001220000-0x000000000163E000-memory.dmp

      Filesize

      4.1MB

    • memory/2880-90-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-91-0x0000000001220000-0x000000000163E000-memory.dmp

      Filesize

      4.1MB

    • memory/2880-62-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-60-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-58-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-56-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-54-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-52-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-50-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-64-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2880-65-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-83-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-81-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB

    • memory/2880-48-0x0000000000400000-0x00000000004A8000-memory.dmp

      Filesize

      672KB