General

  • Target

    b1d833987e962980bfddb58f3f40d044ad3d248e6e4a1c9cd00df8b3c13af0b5

  • Size

    239KB

  • Sample

    240430-b4zmpshb9x

  • MD5

    601172b7aaaacf005837b8125f68d5d3

  • SHA1

    93c0c3687e60c5ad3143ec98bec80a100d89ec2a

  • SHA256

    b1d833987e962980bfddb58f3f40d044ad3d248e6e4a1c9cd00df8b3c13af0b5

  • SHA512

    a2f3eb8a470b1fbfbc07b31ca6ee0883938acb52e38b6891010d40c00061815f4a36e500ccef9b9f1cbbc0c6bc3cf5b4c579c85c3f9e0be4f0a2d5aa1c0920c0

  • SSDEEP

    6144:Id4UcLe0JOqPQZR8MDdATCR3tSv0W8Fo8+FeKCT6:DUP/qPQZR8MxAm/S8W8FocKCT

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot7109324415:AAEtV_HPY0H5mFN38xCDvDx9wl-kKb9q3qg/

Targets

    • Target

      b1d833987e962980bfddb58f3f40d044ad3d248e6e4a1c9cd00df8b3c13af0b5

    • Size

      239KB

    • MD5

      601172b7aaaacf005837b8125f68d5d3

    • SHA1

      93c0c3687e60c5ad3143ec98bec80a100d89ec2a

    • SHA256

      b1d833987e962980bfddb58f3f40d044ad3d248e6e4a1c9cd00df8b3c13af0b5

    • SHA512

      a2f3eb8a470b1fbfbc07b31ca6ee0883938acb52e38b6891010d40c00061815f4a36e500ccef9b9f1cbbc0c6bc3cf5b4c579c85c3f9e0be4f0a2d5aa1c0920c0

    • SSDEEP

      6144:Id4UcLe0JOqPQZR8MDdATCR3tSv0W8Fo8+FeKCT6:DUP/qPQZR8MxAm/S8W8FocKCT

    • AgentTesla

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

    • Blocklisted process makes network request

    • Abuses OpenXML format to download file from external location

    • 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.

    • Adds Run key to start application

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Exploitation for Client Execution

1
T1203

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

2
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

3
T1552.001

Credentials in Registry

1
T1552.002

Discovery

Query Registry

4
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

4
T1082

Collection

Data from Local System

4
T1005

Tasks