General

  • Target

    2ac2d91af826847f3e2544b2420a814d

  • Size

    819KB

  • Sample

    210915-hqya2saad4

  • MD5

    2ac2d91af826847f3e2544b2420a814d

  • SHA1

    79101b95f1d8171e6e5c4ce4e9d9372466a6259d

  • SHA256

    3e3bf2b2439b584bb039f072d969a4b31f5eb4c03fd8033fec911ff3ed5c1878

  • SHA512

    9785737408c6345e35d4ebe9f438bd2647f2b9e230b53592a5d3eebfc70b1969d4e1d614bbe44d7579803af51211f84d2060f558b9052875169f55f91195b4fc

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    mailjege@yandex.com
  • Password:
    recovery111

Targets

    • Target

      2ac2d91af826847f3e2544b2420a814d

    • Size

      819KB

    • MD5

      2ac2d91af826847f3e2544b2420a814d

    • SHA1

      79101b95f1d8171e6e5c4ce4e9d9372466a6259d

    • SHA256

      3e3bf2b2439b584bb039f072d969a4b31f5eb4c03fd8033fec911ff3ed5c1878

    • SHA512

      9785737408c6345e35d4ebe9f438bd2647f2b9e230b53592a5d3eebfc70b1969d4e1d614bbe44d7579803af51211f84d2060f558b9052875169f55f91195b4fc

    • AgentTesla

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

    • Modifies Windows Defender Real-time Protection settings

    • Turns off Windows Defender SpyNet reporting

    • UAC bypass

    • Windows security bypass

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • Nirsoft

    • Executes dropped EXE

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Drops startup file

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Modify Registry

7
T1112

Disabling Security Tools

5
T1089

Bypass User Account Control

1
T1088

Virtualization/Sandbox Evasion

2
T1497

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Tasks