General

  • Target

    Halkbank_Ekstre_202106017_080203_744632.exe

  • Size

    1.1MB

  • Sample

    210617-5flksvdt9a

  • MD5

    b5a1c74a7bc0340d92d5d5e75ee21673

  • SHA1

    047014d069b1d0567c46a5b32f176778d15f9cbf

  • SHA256

    55da32fe4aedb4496414bc49241f166d72819b08dc27e6ce96b551a66ec1c1fb

  • SHA512

    aff0929b60c43e024aacffe26bf556168e2a948a7d6373e717dfd5ad369a27c52f64d39b48ecb21e40686c9d25c0aa38bfb355b8d8b871ebd4e4c2a72a047b43

Malware Config

Extracted

Family

snakekeylogger

Credentials

  • Protocol:
    smtp
  • Host:
    mail.jpentertainment.com.sg
  • Port:
    587
  • Username:
    info@jpentertainment.com.sg
  • Password:
    Esi@jpe3

Targets

    • Target

      Halkbank_Ekstre_202106017_080203_744632.exe

    • Size

      1.1MB

    • MD5

      b5a1c74a7bc0340d92d5d5e75ee21673

    • SHA1

      047014d069b1d0567c46a5b32f176778d15f9cbf

    • SHA256

      55da32fe4aedb4496414bc49241f166d72819b08dc27e6ce96b551a66ec1c1fb

    • SHA512

      aff0929b60c43e024aacffe26bf556168e2a948a7d6373e717dfd5ad369a27c52f64d39b48ecb21e40686c9d25c0aa38bfb355b8d8b871ebd4e4c2a72a047b43

    • Modifies WinLogon for persistence

    • Snake Keylogger

      Keylogger and Infostealer first seen in November 2020.

    • Snake Keylogger Payload

    • Executes dropped EXE

    • Drops startup file

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • 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.

    • 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

Persistence

Winlogon Helper DLL

1
T1004

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Tasks