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Analysis

  • max time kernel
    150s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/09/2022, 10:50

General

  • Target

    sample.exe

  • Size

    1.0MB

  • MD5

    82a1be67742da347df519c0c0b75ed87

  • SHA1

    163e5d1758c7be66a6a3a35d2f9973d209383567

  • SHA256

    02a1835ea805bb1a6ca8d1706fa5a811279ec3fcb1524eb83cfa60f0314cf0dd

  • SHA512

    d2051aa0284e0ab9151417d05eafc037695c32d6bf67512b2c8155ecc303774bdc950c24a658fb88787c4f1c3f6ae8bb0bba2017d90129afcbf484f40baaa4a7

  • SSDEEP

    12288:I5bIINzS9JAJgapke+yoaYRy6Wrq2vElGv9W:qbNzoJ0gakNy9cjWm2UGv

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5415235188:AAGqakDD6FZcw5LLX6hH5qVayV-1OGURlEo/sendMessage?chat_id=1372472614

Signatures

  • BluStealer

    A Modular information stealer written in Visual Basic.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 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.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\sample.exe
    "C:\Users\Admin\AppData\Local\Temp\sample.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:628
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fjuIjtcpvLma.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2256
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fjuIjtcpvLma" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBBFD.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2460
    • C:\Users\Admin\AppData\Local\Temp\sample.exe
      "C:\Users\Admin\AppData\Local\Temp\sample.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:764
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        3⤵
        • Accesses Microsoft Outlook profiles
        • Checks processor information in registry
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1500

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpBBFD.tmp

    Filesize

    1KB

    MD5

    c94f62ce2e7a2b7d1e86d06235530c94

    SHA1

    f3e8865709d028052062677528f1a3f41c3bfcf6

    SHA256

    ee67e67421115016a376bb60d3ee9960940210089f755d87f679bed6c5477541

    SHA512

    21ee8f3ea83a6cf3901344b28a70880b6aeac9af91d89175f99cc8cd25f993ab251db846920ec6e78286b225b06c8d8314cef55a3bf20d743349325ad1d614d6

  • memory/628-135-0x0000000004F60000-0x0000000004F6A000-memory.dmp

    Filesize

    40KB

  • memory/628-134-0x0000000005010000-0x00000000050A2000-memory.dmp

    Filesize

    584KB

  • memory/628-136-0x0000000008BC0000-0x0000000008C5C000-memory.dmp

    Filesize

    624KB

  • memory/628-137-0x0000000000E40000-0x0000000000EA6000-memory.dmp

    Filesize

    408KB

  • memory/628-133-0x00000000055C0000-0x0000000005B64000-memory.dmp

    Filesize

    5.6MB

  • memory/628-132-0x00000000004C0000-0x00000000005CE000-memory.dmp

    Filesize

    1.1MB

  • memory/764-146-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/764-164-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/764-144-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1500-158-0x00000000005B0000-0x00000000005CA000-memory.dmp

    Filesize

    104KB

  • memory/2256-156-0x0000000007040000-0x000000000705A000-memory.dmp

    Filesize

    104KB

  • memory/2256-140-0x0000000002410000-0x0000000002446000-memory.dmp

    Filesize

    216KB

  • memory/2256-150-0x0000000005010000-0x0000000005076000-memory.dmp

    Filesize

    408KB

  • memory/2256-151-0x0000000005D20000-0x0000000005D3E000-memory.dmp

    Filesize

    120KB

  • memory/2256-152-0x0000000006D30000-0x0000000006D62000-memory.dmp

    Filesize

    200KB

  • memory/2256-153-0x00000000718D0000-0x000000007191C000-memory.dmp

    Filesize

    304KB

  • memory/2256-154-0x00000000062D0000-0x00000000062EE000-memory.dmp

    Filesize

    120KB

  • memory/2256-155-0x00000000076A0000-0x0000000007D1A000-memory.dmp

    Filesize

    6.5MB

  • memory/2256-143-0x0000000005110000-0x0000000005738000-memory.dmp

    Filesize

    6.2MB

  • memory/2256-149-0x0000000004F70000-0x0000000004F92000-memory.dmp

    Filesize

    136KB

  • memory/2256-159-0x00000000070A0000-0x00000000070AA000-memory.dmp

    Filesize

    40KB

  • memory/2256-160-0x00000000072B0000-0x0000000007346000-memory.dmp

    Filesize

    600KB

  • memory/2256-161-0x0000000007260000-0x000000000726E000-memory.dmp

    Filesize

    56KB

  • memory/2256-162-0x0000000007370000-0x000000000738A000-memory.dmp

    Filesize

    104KB

  • memory/2256-163-0x0000000007350000-0x0000000007358000-memory.dmp

    Filesize

    32KB