General

  • Target

    b20a52eb7cff0171a3465aa4cd406d3787ec9fe04ffc1553fed9f42e3f3491f2

  • Size

    370KB

  • Sample

    220521-crg3kahdek

  • MD5

    e8ae1055bd396e80f64063d6b74b1eba

  • SHA1

    d1f02538f8290b46a63496a84e555eee1303ee1e

  • SHA256

    b20a52eb7cff0171a3465aa4cd406d3787ec9fe04ffc1553fed9f42e3f3491f2

  • SHA512

    2a3b7e7cbf36d11c5a17b445e80585888e172d7755c9126e3226f277d17197f78793674369d32525f96f30b520fcd103ffbd2445ae3b8dfe0ddbecb87b667e09

Malware Config

Extracted

Family

matiex

C2

https://api.telegram.org/bot1328029504:AAGKFzQ1tJdWqJzQg7lW0DK-JgG0_8hFEEk/sendMessage?chat_id=1072388187

Targets

    • Target

      DHL_AWB #1008936572891_pdf.exe

    • Size

      1.5MB

    • MD5

      4aef48d3cbbaaf5e04c061d9e2b7a43e

    • SHA1

      beb448364273779feee179e0802ab2e4d0c320db

    • SHA256

      19dd4bf0d6b8777c37e1e6959519b46a9b2755cb80c6ae95572c2e8d48991405

    • SHA512

      d11a63b4488a39aa4e73e63f0b48aad7c5cb82ca647b5c5447ce7a6c5c5a53db5b426209d58c58ad336f5e887bc870b58296170ea96543b90711abd1b6252d62

    • AgentTesla

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

    • Matiex

      Matiex is a keylogger and infostealer first seen in July 2020.

    • Matiex Main Payload

    • AgentTesla Payload

    • Executes dropped EXE

    • Checks computer location settings

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

    • Drops startup file

    • Loads dropped DLL

    • 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

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks