Overview

overview

10

Static

static

Documents.pdf.exe

windows7_x64

10

Documents.pdf.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    152s
  • max time network
    168s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21/05/2022, 01:54

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General

  • Target
    Documents.pdf.exe
  • Size 842KB
  • Sample220521-cbjapadef4
  • SHA256 44a9da622295549820b1eb9645b524cc0a54b3c91832be3ba44630866a179607
  • MD5 SHA1 SHA512
Score
10/10
massloggerransomwarespywarestealer

Malware Config

Extracted

Path

  • C:\Users\Admin\AppData\Local\Temp\F95B724EDE\Log.txt

  • masslogger

Ransom Note
  • ################################################################# MassLogger v1.3.7.0 ################################################################# ### Logger Details ### User Name: Admin IP: 127.0.0.1 Location: United States Windows OS: Microsoft Windows 10 Pro64bit Windows Serial Key: W269N-WFGWX-YVC9B-4J6C9-T83GX CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 4:54:22 AM MassLogger Started: 5/21/2022 4:53:24 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Documents.pdf.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Signatures

  • MassLogger

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

    stealerspywaremasslogger
  • MassLogger Main Payload 1 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • 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 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Documents.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Documents.pdf.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2736
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OmZtCG" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB3EE.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:5072
    • C:\Users\Admin\AppData\Local\Temp\Documents.pdf.exe
      "{path}"
      2⤵
        PID:2304
      • C:\Users\Admin\AppData\Local\Temp\Documents.pdf.exe
        "{path}"
        2⤵
        • Checks computer location settings
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:2236

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          tmpB3EE.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\tmpB3EE.tmp
          • Size 1KB
          • SHA256 5a6ca3b3748109f1ee3656a821c82775b50c8fa35f7dbfe0ee48fbcff9489080
          • MD5 SHA1 SHA512
          Submit Download

          memory/2236-139-0x0000000000400000-0x00000000004A8000-memory.dmp
          Download

          memory/2236-140-0x0000000005940000-0x00000000059A6000-memory.dmp
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          memory/2236-141-0x0000000007250000-0x000000000725A000-memory.dmp
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          memory/2736-131-0x0000000000F50000-0x0000000001028000-memory.dmp
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          memory/2736-132-0x0000000005890000-0x000000000592C000-memory.dmp
          Download

          memory/2736-133-0x0000000005A40000-0x0000000005AD2000-memory.dmp
          Download

          memory/2736-134-0x0000000007970000-0x0000000007F14000-memory.dmp
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