General

  • Target

    2909694b162fb67f8b7d6f01bdb086d23216280a1f84565a13a4406ac46147c3

  • Size

    673KB

  • Sample

    220520-2zx67abcdq

  • MD5

    2fb78b099edc88207a4dbcfa8b6a44e0

  • SHA1

    4c7a556c5d7373bee762c51c716a548d6f6a4974

  • SHA256

    2909694b162fb67f8b7d6f01bdb086d23216280a1f84565a13a4406ac46147c3

  • SHA512

    01569acb98ebf4aa45b8a79362501d1d6fcb4b7baf29b4b9e9eed1166228b73cc68ffadc83730f2921d836153141eddc9ff8c04d9152512c0943eeca5d68488c

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.6.0 ################################################################# ### 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 1:14:39 AM MassLogger Started: 5/21/2022 1:14:28 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: Name:WerFault, Title:Z/z8qH7&G(y2x4)YLm

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\F293CD6622\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.6.0 ################################################################# ### 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 1:15:18 AM MassLogger Started: 5/21/2022 1:15:11 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Targets

    • Target

      doc000643665764.exe

    • Size

      1.4MB

    • MD5

      e04ea3820e1699eb0cce1ddb55b91327

    • SHA1

      736ab206d9bba71557069b42b05b7615b28e5b0f

    • SHA256

      367c31b38577406fec107ed639cc6503710de53d8326b92504fd3919105ffce9

    • SHA512

      64926a6671e9b90a69ffb64f61ae48d59fc61834a5083ae1ad119af711ef04923dfc607ace4bdd4ab2c06e495ee1b84f0399dc0df54b847d201d6770c864167c

    • MassLogger

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

    • MassLogger Main Payload

    • MassLogger log file

      Detects a log file produced by MassLogger.

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks