General

  • Target

    Doc20230126.bin.zip

  • Size

    110KB

  • Sample

    230126-w3mxqsgb3s

  • MD5

    2f7a4783691d82821d0049d486676fdd

  • SHA1

    1abf4c0e13a934dae942a8b0c06887299ab263bc

  • SHA256

    ab77697c50f92371f998ef36a853fa791b188f56722c0aa64bcf39f9d9808b5a

  • SHA512

    71949c0dc62850d3ccdcb36d185e4e6bd87cee0f4d982b1857cf8c9e4f54459455f3163084237d70d4feb90cf61af70b8f16e02813d8998b095c69683e05642d

  • SSDEEP

    3072:e2WgxFbwQB0aH1SbZ4x1F9dGsJbZ//s/zl8lY5O21OjJVEj:enKKQB09bZ49dGsJbZ//sLlWpD6

Malware Config

Targets

    • Target

      Doc20230126.bin

    • Size

      477KB

    • MD5

      447f1d5a645314beb0b1d6b0f2f5119f

    • SHA1

      23ee744fa24aaada6ab0a81166c2f5466d29d502

    • SHA256

      850f818aca36188fff35a492275cd63ba81f6e48263faa669fb5e192165f2f92

    • SHA512

      2a4ed5f9a933ef0330c81672c17623143ee0c3693d6c56c85632c0bac2b7a8fb049bae0af904a1bd2a16db8ac338d78d0928e0edc7f5d866170d25c19407e752

    • SSDEEP

      3072:N36LY3qIwBzFyIR+DSbhsR2OsHas+8yqB1LuiCx8V8rIiJzQvstptE8z0N:N36hWsHtlLv8EiFES0

    • Detect PureCrypter injector

    • PureCrypter

      PureCrypter is a .NET malware loader first seen in early 2021.

    • Checks computer location settings

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

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • 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 Matrix ATT&CK v6

Execution

Command-Line Interface

1
T1059

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks