General

  • Target

    2978b788d747c1dfe75e273d6fdff0dab0ac85e589a8f953786fa23d899276c5

  • Size

    1014KB

  • Sample

    220521-dtpqvsbcfr

  • MD5

    6dfe3c728249f76e9f7cde258a005ce1

  • SHA1

    ba244f3771b75379869805f80a0f2a2a641a9560

  • SHA256

    2978b788d747c1dfe75e273d6fdff0dab0ac85e589a8f953786fa23d899276c5

  • SHA512

    79835795b46127b0febebac2cedb732fa1f86092b6543d0ec88504a0e955d62e215492f97d6e66e618ae8e955e4fc934bd871fcfd43f7681e5c566c6c6c6a598

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\8506BBE7FF\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.6.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.13 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 6:53:35 AM MassLogger Started: 5/21/2022 6:53:17 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Circulator 27643.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.itdone.cz
  • Port:
    587
  • Username:
    testovaci@itdone.cz
  • Password:
    viObavejMa

Targets

    • Target

      Circulator 27643.exe

    • Size

      953KB

    • MD5

      048b39faaf884a5eae0a72e2325a6fb0

    • SHA1

      fcade786c16cd0af8b5699e57b54a30a7ce08f09

    • SHA256

      7f2a8610931a1f5ff9793dcb854ca01aaa6410fb5b4dc287753c558f1b60eee1

    • SHA512

      b360b817f6df4ac7303df3c8ee4657805780b9660823bbc1cd78ce24df8e6af48d914e3aa06215064f217d903311f6ab52e9cd80e1b2fb83d02ef0439d12d464

    • 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.

    • ReZer0 packer

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

    • Checks computer location settings

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

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook profiles

    • 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 Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Tasks