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Analysis

  • max time kernel
    42s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    10/03/2023, 14:53

General

  • Target

    SALARY RECEIPT.exe

  • Size

    3.3MB

  • MD5

    bc9e97f5f18b18824f0d7d4b57603f8d

  • SHA1

    a4f93b7a36b7584fe7ef3bc8e5f5e171a57933d5

  • SHA256

    ed9b8b2727090a9a786fd014f3716eda74f0943e02c215c04c07613c3f271de9

  • SHA512

    5a8bbf32d1a7f3301133c0466b7af051fa6c9c92d33cab5636a3788aa703eb998f0992c89125f0978c2ced43992ad46bd9d6346557ccb8189c74b024ceeb2204

  • SSDEEP

    49152:3YlX8PHUEni17exKgyLiTJVr3SEUnbMXS+q3C:3YlX8P

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5813496253:AAF4hamIx4-mNmFF1DwsqdJ4F9vUBmFqLo/sendMessage?chat_id=1105271645

Signatures

  • BluStealer

    A Modular information stealer written in Visual Basic.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 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 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SALARY RECEIPT.exe
    "C:\Users\Admin\AppData\Local\Temp\SALARY RECEIPT.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2036
    • 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:1732
    • C:\Users\Admin\AppData\Local\Temp\SALARY RECEIPT.exe
      "C:\Users\Admin\AppData\Local\Temp\SALARY RECEIPT.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:572
      • 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
        • outlook_office_path
        • outlook_win_path
        PID:1000

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/572-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/572-81-0x0000000000400000-0x0000000000472000-memory.dmp

    Filesize

    456KB

  • memory/572-72-0x0000000000400000-0x0000000000472000-memory.dmp

    Filesize

    456KB

  • memory/572-69-0x0000000000400000-0x0000000000472000-memory.dmp

    Filesize

    456KB

  • memory/572-67-0x0000000000400000-0x0000000000472000-memory.dmp

    Filesize

    456KB

  • memory/572-62-0x0000000000400000-0x0000000000472000-memory.dmp

    Filesize

    456KB

  • memory/572-63-0x0000000000400000-0x0000000000472000-memory.dmp

    Filesize

    456KB

  • memory/572-64-0x0000000000400000-0x0000000000472000-memory.dmp

    Filesize

    456KB

  • memory/1000-73-0x0000000000090000-0x00000000000F6000-memory.dmp

    Filesize

    408KB

  • memory/1000-74-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

    Filesize

    4KB

  • memory/1000-75-0x0000000000090000-0x00000000000F6000-memory.dmp

    Filesize

    408KB

  • memory/1000-77-0x0000000000090000-0x00000000000F6000-memory.dmp

    Filesize

    408KB

  • memory/1000-79-0x0000000000090000-0x00000000000F6000-memory.dmp

    Filesize

    408KB

  • memory/1000-80-0x0000000004BD0000-0x0000000004C8C000-memory.dmp

    Filesize

    752KB

  • memory/1732-60-0x0000000002650000-0x0000000002690000-memory.dmp

    Filesize

    256KB

  • memory/2036-57-0x0000000000A00000-0x0000000000A92000-memory.dmp

    Filesize

    584KB

  • memory/2036-56-0x0000000004DB0000-0x0000000004DF0000-memory.dmp

    Filesize

    256KB

  • memory/2036-54-0x0000000000FF0000-0x000000000134C000-memory.dmp

    Filesize

    3.4MB

  • memory/2036-55-0x0000000004C00000-0x0000000004DA2000-memory.dmp

    Filesize

    1.6MB