General

  • Target

    MSK872314.exe

  • Size

    630KB

  • Sample

    240611-w52tnswgrh

  • MD5

    397c71ddf48527dc363407c2dc6382fd

  • SHA1

    8d309abbd3842e15778dad790e3bb36371060eab

  • SHA256

    fd2ed2817b36ad04fda64c952b1a38e9a4cee86a247d0a7e9dfea5bab81b2e82

  • SHA512

    a5b4bf00e115c99a2433ebf7f91ea7fc12e6c5a6f06d049d89b9027b29bba769ec51d3ace6a1671595d685db7e74e458cb75e39fe8c1abb9533ae19d0c308a46

  • SSDEEP

    12288:jgSUrka1W50Dt/RtlieB6TxOL0w83/ImkT4bdxrVZ4PBiFeAUVABi+ksSj:hfaQ50DljNNow83gkbTBSYUK/ksSj

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.gmail.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    oadc jzrw bmvr klnl

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      MSK872314.exe

    • Size

      630KB

    • MD5

      397c71ddf48527dc363407c2dc6382fd

    • SHA1

      8d309abbd3842e15778dad790e3bb36371060eab

    • SHA256

      fd2ed2817b36ad04fda64c952b1a38e9a4cee86a247d0a7e9dfea5bab81b2e82

    • SHA512

      a5b4bf00e115c99a2433ebf7f91ea7fc12e6c5a6f06d049d89b9027b29bba769ec51d3ace6a1671595d685db7e74e458cb75e39fe8c1abb9533ae19d0c308a46

    • SSDEEP

      12288:jgSUrka1W50Dt/RtlieB6TxOL0w83/ImkT4bdxrVZ4PBiFeAUVABi+ksSj:hfaQ50DljNNow83gkbTBSYUK/ksSj

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • 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 NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

3
T1552.001

Credentials in Registry

1
T1552.002

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

4
T1005

Tasks