General

  • Target

    f4becb408d750ad2afbf21c109bf3b47_JaffaCakes118

  • Size

    823KB

  • Sample

    240417-brfztsbc3y

  • MD5

    f4becb408d750ad2afbf21c109bf3b47

  • SHA1

    8ac72cb52d1a7b5e898bb4af2116002da9ee917b

  • SHA256

    d018a7658d8dcb21b5a371e6df3207b14d97a1d9c564565f923d5941894624d0

  • SHA512

    8ecfbbf42329b0373540d7cfc7e53c54f9aae6a50a0958952195e31f046503bfee544d13cbd7d252a47a6026706eacd1135bddbe4d1175984b0a028268499a71

  • SSDEEP

    12288:nS2y7gqyVknlb8uYhkOH7eNcHqIucsgHs1KPzx50+xT/qR:nAnyVklb853hnugMqd50+o

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.privateemail.com
  • Port:
    587
  • Username:
    aammorris@askoblue.com
  • Password:
    office12#

Targets

    • Target

      f4becb408d750ad2afbf21c109bf3b47_JaffaCakes118

    • Size

      823KB

    • MD5

      f4becb408d750ad2afbf21c109bf3b47

    • SHA1

      8ac72cb52d1a7b5e898bb4af2116002da9ee917b

    • SHA256

      d018a7658d8dcb21b5a371e6df3207b14d97a1d9c564565f923d5941894624d0

    • SHA512

      8ecfbbf42329b0373540d7cfc7e53c54f9aae6a50a0958952195e31f046503bfee544d13cbd7d252a47a6026706eacd1135bddbe4d1175984b0a028268499a71

    • SSDEEP

      12288:nS2y7gqyVknlb8uYhkOH7eNcHqIucsgHs1KPzx50+xT/qR:nAnyVklb853hnugMqd50+o

    • 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

    • 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