Analysis

  • max time kernel
    142s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220310-en
  • submitted
    26-03-2022 16:24

General

  • Target

    f9548d4c7723aa9facd483bfd30b520961db98087ac08fd7ddb7550410b5d691.exe

  • Size

    578KB

  • MD5

    db4be1a01dfea46c07083a9162281c61

  • SHA1

    f4d2a061df53b905850e1aecb2c007d200e38751

  • SHA256

    f9548d4c7723aa9facd483bfd30b520961db98087ac08fd7ddb7550410b5d691

  • SHA512

    fb92b2ce23378497d0b2b820e1029248bf8a669fcf02ed5e1d14e98ff14991a57ab3ddf41cbe40d4fc3fc083429f73a644ea7231f5b079e2e6831c10aad604cb

Malware Config

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 42 IoCs
  • Adds Run key to start application 2 TTPs 1 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 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f9548d4c7723aa9facd483bfd30b520961db98087ac08fd7ddb7550410b5d691.exe
    "C:\Users\Admin\AppData\Local\Temp\f9548d4c7723aa9facd483bfd30b520961db98087ac08fd7ddb7550410b5d691.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:836
    • C:\Users\Admin\AppData\Local\Temp\f9548d4c7723aa9facd483bfd30b520961db98087ac08fd7ddb7550410b5d691.exe
      "C:\Users\Admin\AppData\Local\Temp\f9548d4c7723aa9facd483bfd30b520961db98087ac08fd7ddb7550410b5d691.exe"
      2⤵
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:2792

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\f9548d4c7723aa9facd483bfd30b520961db98087ac08fd7ddb7550410b5d691.exe.log

    Filesize

    1KB

    MD5

    7ebe314bf617dc3e48b995a6c352740c

    SHA1

    538f643b7b30f9231a3035c448607f767527a870

    SHA256

    48178f884b8a4dd96e330b210b0530667d9473a7629fc6b4ad12b614bf438ee8

    SHA512

    0ba9d8f4244c15285e254d27b4bff7c49344ff845c48bc0bf0d8563072fab4d6f7a6abe6b6742e8375a08e9a3b3e5d5dc4937ab428dbe2dd8e62892fda04507e

  • memory/836-134-0x0000000000380000-0x0000000000416000-memory.dmp

    Filesize

    600KB

  • memory/836-135-0x0000000005520000-0x0000000005AC4000-memory.dmp

    Filesize

    5.6MB

  • memory/836-136-0x0000000004E20000-0x0000000004EB2000-memory.dmp

    Filesize

    584KB

  • memory/836-137-0x0000000004DC0000-0x0000000004DCA000-memory.dmp

    Filesize

    40KB

  • memory/2792-139-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/2792-141-0x00000000065B0000-0x0000000006616000-memory.dmp

    Filesize

    408KB

  • memory/2792-142-0x0000000006F60000-0x0000000006FB0000-memory.dmp

    Filesize

    320KB

  • memory/2792-143-0x0000000007050000-0x00000000070EC000-memory.dmp

    Filesize

    624KB

  • memory/2792-144-0x00000000054B3000-0x00000000054B5000-memory.dmp

    Filesize

    8KB