General

  • Target

    invoice.xls

  • Size

    1.3MB

  • Sample

    230328-g15mfahc87

  • MD5

    ccd88bef786f8ea5476f550b4bf3328a

  • SHA1

    eb36320094269ca0e3c7ebcb8405b2d41ec35bf2

  • SHA256

    77f0075657d4275615fc35fa3008ed59f05a0b4e6fb785af1fd236b3abc0d1b4

  • SHA512

    8cddfd64a141365c9d13b2d0ed329bc4fc21a2d2c623d51b7c29b62c7eb2e9233bc0129df8603f9c1b3a8a0ee6965e84f3100edefcff9f15639ff0d721f66242

  • SSDEEP

    24576:WLK+WQmmav30xMSSMMednErP6bvdXXXXXXXXXXXXUXXXXXXXXXXXXXXXXXpSSMM5:WLKzQmmQ30uMM6uMsR6lr3DGbP

Malware Config

Targets

    • Target

      invoice.xls

    • Size

      1.3MB

    • MD5

      ccd88bef786f8ea5476f550b4bf3328a

    • SHA1

      eb36320094269ca0e3c7ebcb8405b2d41ec35bf2

    • SHA256

      77f0075657d4275615fc35fa3008ed59f05a0b4e6fb785af1fd236b3abc0d1b4

    • SHA512

      8cddfd64a141365c9d13b2d0ed329bc4fc21a2d2c623d51b7c29b62c7eb2e9233bc0129df8603f9c1b3a8a0ee6965e84f3100edefcff9f15639ff0d721f66242

    • SSDEEP

      24576:WLK+WQmmav30xMSSMMednErP6bvdXXXXXXXXXXXXUXXXXXXXXXXXXXXXXXpSSMM5:WLKzQmmQ30uMM6uMsR6lr3DGbP

    • Snake Keylogger

      Keylogger and Infostealer first seen in November 2020.

    • Snake Keylogger payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • 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.

    • Uses the VBS compiler for execution

    • 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

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Defense Evasion

Scripting

1
T1064

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

3
T1082

Query Registry

3
T1012

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks