General

  • Target

    49de80d921b1b300f98b33bcd37b92e8b271e2d8dc8e27d6990d66aa21b5fb8d

  • Size

    821KB

  • Sample

    220516-q5kbqsfefp

  • MD5

    43971b982d0d0019c55f59c52254eee0

  • SHA1

    567a0266c45f2759a7eb95b392a2052ccc00c066

  • SHA256

    49de80d921b1b300f98b33bcd37b92e8b271e2d8dc8e27d6990d66aa21b5fb8d

  • SHA512

    05ee55860bfde7b59d1f22695a12fcd4794dc5053cf76c598b11c20e2c2b9fc1fb1142c70488f94657f02e36ce38c2335274b778f3070eec7d3207448de23d59

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\3B8E3C2477\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.7.1 ################################################################# ### Logger Details ### User Name: Admin IP: 127.0.0.1 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: 5/16/2022 4:59:35 PM MassLogger Started: 5/16/2022 4:59:15 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\49de80d921b1b300f98b33bcd37b92e8b271e2d8dc8e27d6990d66aa21b5fb8d.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\0F48153F20\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.7.1 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 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: 5/16/2022 2:57:17 PM MassLogger Started: 5/16/2022 2:57:13 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\49de80d921b1b300f98b33bcd37b92e8b271e2d8dc8e27d6990d66aa21b5fb8d.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Targets

    • Target

      49de80d921b1b300f98b33bcd37b92e8b271e2d8dc8e27d6990d66aa21b5fb8d

    • Size

      821KB

    • MD5

      43971b982d0d0019c55f59c52254eee0

    • SHA1

      567a0266c45f2759a7eb95b392a2052ccc00c066

    • SHA256

      49de80d921b1b300f98b33bcd37b92e8b271e2d8dc8e27d6990d66aa21b5fb8d

    • SHA512

      05ee55860bfde7b59d1f22695a12fcd4794dc5053cf76c598b11c20e2c2b9fc1fb1142c70488f94657f02e36ce38c2335274b778f3070eec7d3207448de23d59

    • 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

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