Analysis

  • max time kernel
    132s
  • max time network
    167s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/10/2023, 22:24

General

  • Target
    file.exe
  • Size 167KB
  • Sample231028-2bb9tafd54
  • SHA256 a85528d4fcbc101d6c0fc37aad3e1859ad6e8a2556883900627f5e5f455f4f0d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4476
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & del "C:\ProgramData\*.dll"" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4428
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:2872
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4476 -s 2656
      2⤵
      • Program crash
      PID:3696
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4476 -ip 4476
    1⤵
      PID:4004

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          Are.docx

          • Path C:\ProgramData\Are.docx
          • Size 11KB
          • SHA256 5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
          • MD5 SHA1 SHA512 SSDEEP

          mozglue.dll

          • Path C:\ProgramData\mozglue.dll
          • Size 593KB
          • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
          • MD5 SHA1 SHA512 SSDEEP

          mozglue.dll

          • Path C:\ProgramData\mozglue.dll
          • Size 593KB
          • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
          • MD5 SHA1 SHA512 SSDEEP

          nss3.dll

          • Path C:\ProgramData\nss3.dll
          • Size 2.0MB
          • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
          • MD5 SHA1 SHA512 SSDEEP

          memory/4476-1-0x0000000000900000-0x0000000000A00000-memory.dmp

          memory/4476-2-0x0000000000400000-0x00000000007B2000-memory.dmp

          memory/4476-3-0x0000000002500000-0x000000000251B000-memory.dmp

          memory/4476-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

          memory/4476-51-0x0000000000400000-0x00000000007B2000-memory.dmp

          memory/4476-52-0x0000000000900000-0x0000000000A00000-memory.dmp

          memory/4476-89-0x0000000000400000-0x00000000007B2000-memory.dmp

          memory/4476-90-0x0000000000400000-0x00000000007B2000-memory.dmp