General

  • Target

    DR1.exe

  • Size

    15KB

  • Sample

    210120-nck2yxrq8e

  • MD5

    67698483a208b58241acfcdbe9682f90

  • SHA1

    2358b113a5a47d70e78b939156f2cdf7049fc39b

  • SHA256

    8f8198fc76f32f907c255e1715f44deaabd4677f4cc708ecfd6afb1a50d9bcfc

  • SHA512

    726181cf74d4adc26888d5454e66e76ca8887de3956d5a509fd015ae49f83683ad452d4f7a474bcdf3929e5192eb1e87e32636c515755739aef7ad136001b2ce

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.privateemail.com
  • Port:
    587
  • Username:
    max.mccanna@metaltek.me
  • Password:
    @Mexico1.,

Targets

    • Target

      DR1.exe

    • Size

      15KB

    • MD5

      67698483a208b58241acfcdbe9682f90

    • SHA1

      2358b113a5a47d70e78b939156f2cdf7049fc39b

    • SHA256

      8f8198fc76f32f907c255e1715f44deaabd4677f4cc708ecfd6afb1a50d9bcfc

    • SHA512

      726181cf74d4adc26888d5454e66e76ca8887de3956d5a509fd015ae49f83683ad452d4f7a474bcdf3929e5192eb1e87e32636c515755739aef7ad136001b2ce

    • AgentTesla

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

    • Modifies WinLogon for persistence

    • Modifies Windows Defender Real-time Protection settings

    • Turns off Windows Defender SpyNet reporting

    • Windows security bypass

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • 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

    • 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

    • Legitimate hosting services abused for malware hosting/C2

    • Maps connected drives based on registry

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

6
T1112

Disabling Security Tools

4
T1089

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Command and Control

Web Service

1
T1102

Tasks