General

  • Target

    Purchase Order nr53781.doc

  • Size

    310KB

  • Sample

    210128-844z4tljgx

  • MD5

    abf61590ceeb774adc2ecf02f799735b

  • SHA1

    a336b3ba62e428c8eaa7d283ff029180dd77921c

  • SHA256

    07f36154cb584be7679faa22398bf9f79ee95639964a73b1f31c0fec6883b842

  • SHA512

    3f16dc8201eb065176d757b46ff0346dbeede8c28a33535ca09bdd87ece7ae3f95d4c10c21ac1f646ada5e4d4d697986bd478c9707059244fb3227038b3db3d8

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    polar.argondns.net
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    ]4&w8LUz9*LT

Targets

    • Target

      Purchase Order nr53781.doc

    • Size

      310KB

    • MD5

      abf61590ceeb774adc2ecf02f799735b

    • SHA1

      a336b3ba62e428c8eaa7d283ff029180dd77921c

    • SHA256

      07f36154cb584be7679faa22398bf9f79ee95639964a73b1f31c0fec6883b842

    • SHA512

      3f16dc8201eb065176d757b46ff0346dbeede8c28a33535ca09bdd87ece7ae3f95d4c10c21ac1f646ada5e4d4d697986bd478c9707059244fb3227038b3db3d8

    • AgentTesla

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

    • AgentTesla Payload

    • Blocklisted process makes network request

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Exploitation for Client Execution

1
T1203

Defense Evasion

Modify Registry

1
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

Tasks