General

  • Target

    2022-5-1-0-3-7-8.doc

  • Size

    29KB

  • Sample

    221206-hr3xxsgf6w

  • MD5

    43357457f8c6d490b71c157ca62dd6bd

  • SHA1

    1f341aafd5f24377a7a9621cb3675a87cde401e7

  • SHA256

    120ed575fbbc691ab3686f423e6f0274805d17a7763b618fa507f17467c808cd

  • SHA512

    82ce3b374d6581e5e2d32b24a4dfff1e3ba4f5ed4a0fcffd95feb87b47e21873914492a5ff34ad79b50aca3baf4798508a24f95fef6caec54169d68cd33d6dfc

  • SSDEEP

    768:zFx0XaIsnPRIa4fwJMSNvxx+zI8jfrH2GT8hxG:zf0Xvx3EMGv06GTCxG

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      2022-5-1-0-3-7-8.doc

    • Size

      29KB

    • MD5

      43357457f8c6d490b71c157ca62dd6bd

    • SHA1

      1f341aafd5f24377a7a9621cb3675a87cde401e7

    • SHA256

      120ed575fbbc691ab3686f423e6f0274805d17a7763b618fa507f17467c808cd

    • SHA512

      82ce3b374d6581e5e2d32b24a4dfff1e3ba4f5ed4a0fcffd95feb87b47e21873914492a5ff34ad79b50aca3baf4798508a24f95fef6caec54169d68cd33d6dfc

    • SSDEEP

      768:zFx0XaIsnPRIa4fwJMSNvxx+zI8jfrH2GT8hxG:zf0Xvx3EMGv06GTCxG

    • AgentTesla

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

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • 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

    • 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

Exploitation for Client Execution

1
T1203

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks