General

  • Target

    IMG_61772.doc

  • Size

    698KB

  • Sample

    210126-tyyw1pkllj

  • MD5

    15dc5d9fd98a43b9ea77fafe035f110c

  • SHA1

    10edf340c57e6e7bff0ca11692693fede01f7386

  • SHA256

    e3e53818ce691ec1e92f29e93a51eb3e8dc2b213db7b451e61db472938cf7681

  • SHA512

    0f4d775d33e59bce9f256c3ad757fec77826be82dd43c4a5279416a4c01b59844485debd26ff2ecc38592cc92804beef11b35dff36458ebc1bf163193a9f8132

Malware Config

Targets

    • Target

      IMG_61772.doc

    • Size

      698KB

    • MD5

      15dc5d9fd98a43b9ea77fafe035f110c

    • SHA1

      10edf340c57e6e7bff0ca11692693fede01f7386

    • SHA256

      e3e53818ce691ec1e92f29e93a51eb3e8dc2b213db7b451e61db472938cf7681

    • SHA512

      0f4d775d33e59bce9f256c3ad757fec77826be82dd43c4a5279416a4c01b59844485debd26ff2ecc38592cc92804beef11b35dff36458ebc1bf163193a9f8132

    • Snake Keylogger

      Keylogger and Infostealer first seen in November 2020.

    • Snake Keylogger Payload

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Loads dropped DLL

    • 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.

    • 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.

    • Enumerates physical storage devices

      Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Exploitation for Client Execution

1
T1203

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

3
T1082

Query Registry

2
T1012

Collection

Data from Local System

3
T1005

Tasks