General

  • Target

    13deb1f9e3779ecdc3025f0252e22176

  • Size

    742KB

  • Sample

    210915-hts6haaae5

  • MD5

    13deb1f9e3779ecdc3025f0252e22176

  • SHA1

    fd7d53357ad66545b97a9333ad48186fb8ab41c8

  • SHA256

    7a9a395febca4d19f4aae40a2ea18dc819bf7475175cdc2b15e68cb2b5beaff8

  • SHA512

    c08652216e3e7734caebe23c6835f000044df5616ce1abed2ac4b13ccf303c5626ae74e45e17b3c2537f7026e1702ebd8447b504acd97688d28809afb9be81db

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.privateemail.com
  • Port:
    587
  • Username:
    e.werner@eccovacs-europe.com
  • Password:
    alibaba.com

Targets

    • Target

      13deb1f9e3779ecdc3025f0252e22176

    • Size

      742KB

    • MD5

      13deb1f9e3779ecdc3025f0252e22176

    • SHA1

      fd7d53357ad66545b97a9333ad48186fb8ab41c8

    • SHA256

      7a9a395febca4d19f4aae40a2ea18dc819bf7475175cdc2b15e68cb2b5beaff8

    • SHA512

      c08652216e3e7734caebe23c6835f000044df5616ce1abed2ac4b13ccf303c5626ae74e45e17b3c2537f7026e1702ebd8447b504acd97688d28809afb9be81db

    • 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

    • 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

    • 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

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

2
T1005

Tasks