General

  • Target

    109408dcfe0784adfeea32943d88f40a21a1439057026372bda3e1a0ba2c4618

  • Size

    754KB

  • Sample

    220520-2nrv2afff4

  • MD5

    79c3fed794f20f92040c608c31eb8a30

  • SHA1

    1a37d5b43e95dc5e60ab5f18e3b3b535b9c99dd6

  • SHA256

    109408dcfe0784adfeea32943d88f40a21a1439057026372bda3e1a0ba2c4618

  • SHA512

    521d53aa12b8bc0c001dfd7d4457f9edb05f297249e7f8383de7e87759b5c90230b2bba295d373998987517685e1cb22bb0dc4a1dcbe217d3142b3da5cfa2073

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.nabf.com.au
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    r%cd3=De!F8)?Q.VuK

Targets

    • Target

      TNT Shipping Documents_pdf.exe

    • Size

      862KB

    • MD5

      5a95e13acb71d2050f346aacdbd31a06

    • SHA1

      503dc0640ea73f76f4bfb776ecd03da6148e2077

    • SHA256

      38fcb333238cb4390662b70073f768dd5928d7995b77747add4f2acc8dff4db0

    • SHA512

      ec98e63d65e87a4ffd4a9d5791e42300969d11523a1edacc24b6c328306ad4625da3e5bef2fd36488fe0515528f2f7acfe31092ff0f0ecd6a11b7b735b039b1e

    • AgentTesla

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

    • 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.

    • Checks computer location settings

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

    • 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.

    • Accesses Microsoft Outlook profiles

    • 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

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks