Analysis

  • max time kernel
    89s
  • max time network
    186s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    15-04-2022 12:29

General

  • Target

    4198f9d245bc2d91af9fc0827799db85794cbdbc2c958bead60492b3d7c629f9.exe

  • Size

    618KB

  • MD5

    4f484e9f3f248052e2ce87a917e9bffb

  • SHA1

    0a21d661233cb696535225e4fc6eb35e13515873

  • SHA256

    4198f9d245bc2d91af9fc0827799db85794cbdbc2c958bead60492b3d7c629f9

  • SHA512

    7104037adab0c6470ce7eec964677a1f9755724db54008c9a20c0cdd69d1578d18d1dde13dedcf9a3d1a2b23d193aa40b63eaffb9d4afe4d141f6e96952e86e6

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 4 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\4198f9d245bc2d91af9fc0827799db85794cbdbc2c958bead60492b3d7c629f9.exe
    "C:\Users\Admin\AppData\Local\Temp\4198f9d245bc2d91af9fc0827799db85794cbdbc2c958bead60492b3d7c629f9.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1880
    • C:\Users\Admin\AppData\Local\Temp\4198f9d245bc2d91af9fc0827799db85794cbdbc2c958bead60492b3d7c629f9.exe
      "C:\Users\Admin\AppData\Local\Temp\4198f9d245bc2d91af9fc0827799db85794cbdbc2c958bead60492b3d7c629f9.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:2836

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\4198f9d245bc2d91af9fc0827799db85794cbdbc2c958bead60492b3d7c629f9.exe.log

    Filesize

    1KB

    MD5

    7ebe314bf617dc3e48b995a6c352740c

    SHA1

    538f643b7b30f9231a3035c448607f767527a870

    SHA256

    48178f884b8a4dd96e330b210b0530667d9473a7629fc6b4ad12b614bf438ee8

    SHA512

    0ba9d8f4244c15285e254d27b4bff7c49344ff845c48bc0bf0d8563072fab4d6f7a6abe6b6742e8375a08e9a3b3e5d5dc4937ab428dbe2dd8e62892fda04507e

  • memory/1880-130-0x0000000000980000-0x0000000000A20000-memory.dmp

    Filesize

    640KB

  • memory/1880-131-0x0000000009EB0000-0x000000000A454000-memory.dmp

    Filesize

    5.6MB

  • memory/1880-132-0x0000000005520000-0x00000000055B2000-memory.dmp

    Filesize

    584KB

  • memory/1880-133-0x00000000055C0000-0x00000000055CA000-memory.dmp

    Filesize

    40KB

  • memory/2836-134-0x0000000000000000-mapping.dmp

  • memory/2836-135-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/2836-137-0x00000000065E0000-0x0000000006646000-memory.dmp

    Filesize

    408KB

  • memory/2836-138-0x0000000006F70000-0x0000000006FC0000-memory.dmp

    Filesize

    320KB

  • memory/2836-139-0x0000000007080000-0x000000000711C000-memory.dmp

    Filesize

    624KB

  • memory/2836-140-0x0000000005273000-0x0000000005275000-memory.dmp

    Filesize

    8KB