General

  • Target

    5ef9e2b5300d9ffdd59ca9dda061e9f1555741ada91734ac323aaa3d09c55871

  • Size

    1.6MB

  • Sample

    220521-n6xbksega6

  • MD5

    875e991e811b4c56cafee4ad615644be

  • SHA1

    02b56e273d941b9973312431b3d20e2f52acf395

  • SHA256

    5ef9e2b5300d9ffdd59ca9dda061e9f1555741ada91734ac323aaa3d09c55871

  • SHA512

    d3bfc7a11c939e062c2837b0da801c1aa9d1341cacd00f4861bb1a9d08eac4e8338bf9330cb145dea3bd7451f3fc20be01bc2a6c77f2cfd5cadf69d7b1e72d14

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: 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: 5/21/2022 2:54:27 PM MassLogger Started: 5/21/2022 2:54:09 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\PO__1003.exe MassLogger Melt: true MassLogger Exit after delivery: false As Administrator: True Processes:

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 2:54:33 PM MassLogger Started: 5/21/2022 2:54:26 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\PO__1003.exe MassLogger Melt: true MassLogger Exit after delivery: false As Administrator: True Processes:

Targets

    • Target

      PO__1003.EXE

    • Size

      1.0MB

    • MD5

      47d10c95e38be0cfbd670a1b378c26a2

    • SHA1

      ad33ec21b4d327c036f207e62c59e85258a57502

    • SHA256

      34fd5c49f828705b2f744802f7f11c4fea6715817906c331e6052d09bedf62fa

    • SHA512

      094345c9b41e3516248cf507ec616b663615b73dd73a9b7253f69cc774aad5ccc268586de24f887c3924ac0ebbcc776f5e033d17a9975783439249f3c372afb7

    • 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.

    • Deletes itself

    • 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

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Tasks