General

  • Target

    66e196c15ec46d1e7526b1c48da1b72a.bin

  • Size

    599KB

  • Sample

    240327-cywvasaf36

  • MD5

    798acc91e570f68ae4ea81711c5ed66a

  • SHA1

    3328293816e1daf60d49ef2fbdd386b98c0c3116

  • SHA256

    0a41f627f74d812289dcaf44378a03d7802e179c5cfb12bcf270b8070285e6fc

  • SHA512

    cf87f2dd353823a87c81b44d2e5ddd352f129651b90011486ea3134c202eb19af518830c3f08f49f7150e27e9bef8c29bec17890a43f2b2e608e532ed681039f

  • SSDEEP

    12288:t/NkI/ErpFhM/642UShka15WQXX3f626QoTrSkrLC5fHPyz9LlmfH5ez6aNqq0/M:tl/srpF+/53+dXv62DSrlW5fvmvmBSpD

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      8c5c6b99a06119e1064bfcf3f53cc66150751c0969dc37dc3603eef5535a8af9.exe

    • Size

      610KB

    • MD5

      66e196c15ec46d1e7526b1c48da1b72a

    • SHA1

      f9b2dc950a21c296aaf57a013c3f4e93f8ebbad2

    • SHA256

      8c5c6b99a06119e1064bfcf3f53cc66150751c0969dc37dc3603eef5535a8af9

    • SHA512

      f8d8241d5af76033ba83caff888d325285110356b8e35175260a912cf416670465d218d7c550b9f15cc969bc2f53381cb8e41dd4f9a859cae65e4df600b6f851

    • SSDEEP

      12288:yRfHhxVzsP5wzyNwv5gs3MjeNPq0wKrCHrT3GQzRVPUYvV3L2dXEg:yXxU5wzaktc4PEWCHfGQzbPfvFydXEg

    • AgentTesla

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

    • UAC bypass

    • Windows security bypass

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • 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.

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • 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

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

3
T1562

Disable or Modify Tools

3
T1562.001

Modify Registry

5
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

3
T1552.001

Credentials in Registry

1
T1552.002

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks