General

  • Target

    05438e3d5f2c2fb2f260405f1d483325d74e21ef7e6a9f59535e72e45caad5ba

  • Size

    716KB

  • Sample

    240427-bykatsgc44

  • MD5

    18b9f67364daef9baabd76428debcfd9

  • SHA1

    c21249f8121d6700f84fb9a571e3f35ae94b12fe

  • SHA256

    05438e3d5f2c2fb2f260405f1d483325d74e21ef7e6a9f59535e72e45caad5ba

  • SHA512

    915ea3e10954140233232f6256388c283001a69eac075de9c3360b5c98b8f58d7da737aa961075ae495c9949da2a7ad3cd299c172834cda216977dd3ee120a93

  • SSDEEP

    12288:zWYIPXjxannnHg2x7ZdRv/7Frn78nnnHA+tbHrkQyF2t2r0NASvh75A+9QIGJPLd:zWYIPFannnHg2FRv/7Frn72nnHA+tMQm

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot6898096162:AAFzf90ZkuQ80ZmTP6HPUBE8_1lQzS4JyCI/

Targets

    • Target

      05438e3d5f2c2fb2f260405f1d483325d74e21ef7e6a9f59535e72e45caad5ba

    • Size

      716KB

    • MD5

      18b9f67364daef9baabd76428debcfd9

    • SHA1

      c21249f8121d6700f84fb9a571e3f35ae94b12fe

    • SHA256

      05438e3d5f2c2fb2f260405f1d483325d74e21ef7e6a9f59535e72e45caad5ba

    • SHA512

      915ea3e10954140233232f6256388c283001a69eac075de9c3360b5c98b8f58d7da737aa961075ae495c9949da2a7ad3cd299c172834cda216977dd3ee120a93

    • SSDEEP

      12288:zWYIPXjxannnHg2x7ZdRv/7Frn78nnnHA+tbHrkQyF2t2r0NASvh75A+9QIGJPLd:zWYIPFannnHg2FRv/7Frn72nnHA+tMQm

    • 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 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

    • 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 v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

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

Tasks