Analysis

  • max time kernel
    46s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    26-01-2023 22:08

General

  • Target

    tmp780A.tmp.exe

  • Size

    4.0MB

  • MD5

    58f86d3f8a1f981a7c7bf541c3bc787b

  • SHA1

    a6b43c84c1b79551b39fc7c589deec969de84227

  • SHA256

    5ec2cb39e7538c4c2eaedcd2c2ce1ea79665260e14ff5b6579e33829c06c0235

  • SHA512

    88dd8807bbc2ad6f93eacc729489d4a859edf310becfafb788c69de80b716780dde739604d53656be8cbec160c940392d24344d2737ff9d25e064f29989b7719

  • SSDEEP

    98304:j5p0FLvYwv0qdE+T/6dBVeAhy5zhLaHtZO3jB9L0l3nHQvvw4:j5KpvNJHj6dXEnLuZOr0Znw

Malware Config

Extracted

Family

aurora

C2

79.137.133.225:8081

Signatures

  • Aurora

    Aurora is a crypto wallet stealer written in Golang.

  • Detect PureCrypter injector 1 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • 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
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp780A.tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp780A.tmp.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1764
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2036
    • C:\Users\Admin\AppData\Local\Temp\tmp780A.tmp.exe
      C:\Users\Admin\AppData\Local\Temp\tmp780A.tmp.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:680
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1200
      • C:\Windows\SysWOW64\cmd.exe
        cmd /C "wmic path win32_VideoController get name"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1056
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic path win32_VideoController get name
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1540
      • C:\Windows\SysWOW64\cmd.exe
        cmd /C "wmic cpu get name"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1616
        • C:\Windows\SysWOW64\Wbem\WMIC.exe
          wmic cpu get name
          4⤵
            PID:1532

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Credential Access

    Credentials in Files

    2
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    2
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/680-78-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-74-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-70-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-84-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-71-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-77-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-73-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-63-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-64-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-66-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-68-0x0000000000400000-0x0000000000876000-memory.dmp
      Filesize

      4.5MB

    • memory/680-75-0x0000000000466710-mapping.dmp
    • memory/1056-80-0x0000000000000000-mapping.dmp
    • memory/1200-79-0x0000000000000000-mapping.dmp
    • memory/1532-83-0x0000000000000000-mapping.dmp
    • memory/1540-81-0x0000000000000000-mapping.dmp
    • memory/1616-82-0x0000000000000000-mapping.dmp
    • memory/1764-62-0x00000000060A0000-0x0000000006292000-memory.dmp
      Filesize

      1.9MB

    • memory/1764-56-0x0000000075E81000-0x0000000075E83000-memory.dmp
      Filesize

      8KB

    • memory/1764-54-0x00000000010E0000-0x00000000014E6000-memory.dmp
      Filesize

      4.0MB

    • memory/1764-55-0x0000000004E30000-0x0000000005234000-memory.dmp
      Filesize

      4.0MB

    • memory/2036-59-0x000000006F560000-0x000000006FB0B000-memory.dmp
      Filesize

      5.7MB

    • memory/2036-61-0x000000006F560000-0x000000006FB0B000-memory.dmp
      Filesize

      5.7MB

    • memory/2036-60-0x000000006F560000-0x000000006FB0B000-memory.dmp
      Filesize

      5.7MB

    • memory/2036-57-0x0000000000000000-mapping.dmp