General

  • Target

    vbc.exe

  • Size

    790KB

  • Sample

    230328-lfggbsab55

  • MD5

    425124613fb9b4daa38460652fd75e38

  • SHA1

    542aaee07bd064ec6384685fa9ce9299915fb680

  • SHA256

    e867bb597f0b2dc98057b12a90fcef9eca9e78ae1081370f89593f0d210a5acb

  • SHA512

    915a482bd97fa5ac8e388b46bb89e011742595a56902c65fbba0edb1b218a1b600a31c7bf3cc2735c02f3f9b6d59995ebf9203e2701ad8cd03c7a2316e1208dd

  • SSDEEP

    24576:ImVZ9mZojJlboENPVbI/4WgyJMLpLJwK:93sojkEP1LWTep+K

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot5663632223:AAG5KHZDs7KWoaqTYx3lSyFlOdfD9vGegQo/

Targets

    • Target

      vbc.exe

    • Size

      790KB

    • MD5

      425124613fb9b4daa38460652fd75e38

    • SHA1

      542aaee07bd064ec6384685fa9ce9299915fb680

    • SHA256

      e867bb597f0b2dc98057b12a90fcef9eca9e78ae1081370f89593f0d210a5acb

    • SHA512

      915a482bd97fa5ac8e388b46bb89e011742595a56902c65fbba0edb1b218a1b600a31c7bf3cc2735c02f3f9b6d59995ebf9203e2701ad8cd03c7a2316e1208dd

    • SSDEEP

      24576:ImVZ9mZojJlboENPVbI/4WgyJMLpLJwK:93sojkEP1LWTep+K

    • AgentTesla

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

    • Checks computer location settings

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

    • 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

    • Adds Run key to start application

    • 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

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Scripting

1
T1064

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks