Analysis

  • max time kernel
    130s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20220414-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\3B8E3C2477\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 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 5:17:31 AM MassLogger Started: 5/21/2022 5:17:16 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 6 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • ReZer0 packer 1 IoCs

    Detects ReZer0, a packer with multiple versions used in various campaigns.

  • 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 15 IoCs
  • Looks up external IP address via web service 2 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 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⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1016
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\qgklKc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp79F1.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1768
    • 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:1800

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp79F1.tmp

    Filesize

    1KB

    MD5

    7043da73a82b1a0094e11be19b3bcd47

    SHA1

    0e212a3ac9766a88e93bcc4788aed488c2808dec

    SHA256

    23cf477b2348bcaf804e26593ef2d408161b064399415e0b43277e9be3588833

    SHA512

    9fd2383ed6a59922e546cc69a98b98e372c3a52dcd2907d2cf9d3caa7896e671dd3f8e2480c865592ac7f1af2932a1f7ec92d9a565b9e44a2201f69c5717a64b

  • memory/1016-54-0x0000000000F50000-0x000000000103C000-memory.dmp

    Filesize

    944KB

  • memory/1016-55-0x0000000000390000-0x00000000003A4000-memory.dmp

    Filesize

    80KB

  • memory/1016-56-0x00000000077B0000-0x000000000785E000-memory.dmp

    Filesize

    696KB

  • memory/1768-57-0x0000000000000000-mapping.dmp

  • memory/1800-63-0x0000000000400000-0x00000000004A8000-memory.dmp

    Filesize

    672KB

  • memory/1800-60-0x0000000000400000-0x00000000004A8000-memory.dmp

    Filesize

    672KB

  • memory/1800-62-0x0000000000400000-0x00000000004A8000-memory.dmp

    Filesize

    672KB

  • memory/1800-59-0x0000000000400000-0x00000000004A8000-memory.dmp

    Filesize

    672KB

  • memory/1800-64-0x0000000000400000-0x00000000004A8000-memory.dmp

    Filesize

    672KB

  • memory/1800-65-0x00000000004A2DBE-mapping.dmp

  • memory/1800-67-0x0000000000400000-0x00000000004A8000-memory.dmp

    Filesize

    672KB

  • memory/1800-69-0x0000000000400000-0x00000000004A8000-memory.dmp

    Filesize

    672KB

  • memory/1800-70-0x0000000000500000-0x0000000000544000-memory.dmp

    Filesize

    272KB

  • memory/1800-71-0x0000000075F61000-0x0000000075F63000-memory.dmp

    Filesize

    8KB

  • memory/1800-72-0x0000000000F05000-0x0000000000F16000-memory.dmp

    Filesize

    68KB