General

  • Target

    1c35b8422e6ad13accb39e4e6a0b00fc_JaffaCakes118

  • Size

    895KB

  • Sample

    240506-m9afjsdb38

  • MD5

    1c35b8422e6ad13accb39e4e6a0b00fc

  • SHA1

    ef1abf8e26b28de0c3d2f17e554dd3b1edbf0253

  • SHA256

    8d4a01b04439bd4ea04fca05aa078367da91aefea6dbe7b317c3fa16ca9d3354

  • SHA512

    c4f9400b62bd977828f058acd52e7be13a2138dad81f767badf91b6060927f9b04cf08f64197475f5a1cb4bfd9f0046f6fffe035cfa700659774766c23d9d596

  • SSDEEP

    12288:CYS1QbvgWK5WpLxieT8n7vSbbiHktlSFyg82MIM+C0q5xQ8w:CxQbvxaW7ijn7vSbb7IQIes

Malware Config

Targets

    • Target

      1c35b8422e6ad13accb39e4e6a0b00fc_JaffaCakes118

    • Size

      895KB

    • MD5

      1c35b8422e6ad13accb39e4e6a0b00fc

    • SHA1

      ef1abf8e26b28de0c3d2f17e554dd3b1edbf0253

    • SHA256

      8d4a01b04439bd4ea04fca05aa078367da91aefea6dbe7b317c3fa16ca9d3354

    • SHA512

      c4f9400b62bd977828f058acd52e7be13a2138dad81f767badf91b6060927f9b04cf08f64197475f5a1cb4bfd9f0046f6fffe035cfa700659774766c23d9d596

    • SSDEEP

      12288:CYS1QbvgWK5WpLxieT8n7vSbbiHktlSFyg82MIM+C0q5xQ8w:CxQbvxaW7ijn7vSbb7IQIes

    • AgentTesla

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

    • AgentTesla payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • 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 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.

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

3
T1552.001

Credentials in Registry

1
T1552.002

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

4
T1005

Email Collection

1
T1114

Tasks