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Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/08/2022, 08:53

General

  • Target

    Halkbank,.pdf.exe

  • Size

    628KB

  • MD5

    a63e6e9c58e82cce53442ebacb9fb399

  • SHA1

    b82363c41eea39a1db51c2ac9bff713dfac171e7

  • SHA256

    ec8fddcd3c310a14168754ee1965cfb5c7d7c86360a146c1da4c042afb551dda

  • SHA512

    a69cb143ca04b34657421ccc366eb70a752d13e8cc363398486ec6f1abefa8032c156b7abfb38f7a9cc885f8410c835f9f945b515d75384325a7d1e800e7adc7

Malware Config

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
  • 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.

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4428
    • C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1244
      • 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:3608

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1244-145-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/1244-144-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/1244-139-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/1244-137-0x0000000000400000-0x0000000000421000-memory.dmp

    Filesize

    132KB

  • memory/3608-143-0x0000000000D60000-0x0000000000D7A000-memory.dmp

    Filesize

    104KB

  • memory/4428-135-0x000000000B2A0000-0x000000000B306000-memory.dmp

    Filesize

    408KB

  • memory/4428-134-0x000000000AF80000-0x000000000B01C000-memory.dmp

    Filesize

    624KB

  • memory/4428-133-0x0000000004FE0000-0x0000000004FEA000-memory.dmp

    Filesize

    40KB

  • memory/4428-130-0x00000000005A0000-0x0000000000644000-memory.dmp

    Filesize

    656KB

  • memory/4428-132-0x0000000005030000-0x00000000050C2000-memory.dmp

    Filesize

    584KB

  • memory/4428-131-0x00000000055E0000-0x0000000005B84000-memory.dmp

    Filesize

    5.6MB