Analysis

  • max time kernel
    146s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 02:08

General

  • Target

    No42113-No42114.exe

  • Size

    922KB

  • MD5

    f199ca0e897812a4218b91a293a7656b

  • SHA1

    0c9ea2d1c5c0254a278940c3b5ca7c25942b50fb

  • SHA256

    9300260a0aa311aa5e53e3c015ba7c63bb52ccb40c9841d4f566a6019143257d

  • SHA512

    3dd1ba3483ac0ce0d4202ebcf400ed0abd7a17f5e5e595fbff9f08606a72d21a3f752b3fff72e91c966a6db1edd44a0807681ec6e901927275a2f3441d2464d5

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\8236ADF044\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.7.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 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 5:18:10 AM MassLogger Started: 5/21/2022 5:18:06 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\No42113-No42114.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.

  • 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.

  • 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 18 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
  • 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.

  • 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 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\No42113-No42114.exe
    "C:\Users\Admin\AppData\Local\Temp\No42113-No42114.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2704
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\qgklKc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEFCE.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4504
    • C:\Users\Admin\AppData\Local\Temp\No42113-No42114.exe
      "{path}"
      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:4580

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpEFCE.tmp

    Filesize

    1KB

    MD5

    34651b2e636629d65d77f1ad98cfe600

    SHA1

    4b4570e904e90c0368b5c906fdb035db5ae11da8

    SHA256

    06fdef00e709e8b9aabb90b1dd11a884d32d6a40098196062bdd1f1fbd54d3f2

    SHA512

    865b345c540f77c0f6f0f315f3366a0352ca93679c390a052a5e1258b22b11cef0f7dd242711cea20f543ad9fbbbd1f907da0a7b5c4fdf32167227ad98a3ba90

  • memory/2704-130-0x00000000009F0000-0x0000000000ADC000-memory.dmp

    Filesize

    944KB

  • memory/2704-131-0x00000000081B0000-0x0000000008754000-memory.dmp

    Filesize

    5.6MB

  • memory/2704-132-0x0000000007CE0000-0x0000000007D72000-memory.dmp

    Filesize

    584KB

  • memory/2704-133-0x0000000007E20000-0x0000000007EBC000-memory.dmp

    Filesize

    624KB

  • memory/4504-134-0x0000000000000000-mapping.dmp

  • memory/4580-136-0x0000000000000000-mapping.dmp

  • memory/4580-137-0x0000000000400000-0x00000000004A8000-memory.dmp

    Filesize

    672KB

  • memory/4580-138-0x0000000005500000-0x0000000005566000-memory.dmp

    Filesize

    408KB

  • memory/4580-139-0x00000000065D0000-0x00000000065DA000-memory.dmp

    Filesize

    40KB

  • memory/4580-140-0x00000000081D0000-0x0000000008220000-memory.dmp

    Filesize

    320KB