General

  • Target

    248e524e42629178b3edef50dae4bf1017b41d919eb643c3b150092369a76d10

  • Size

    456KB

  • Sample

    220521-patfgsehf2

  • MD5

    23534078053fd963e4d4e2a0220e824a

  • SHA1

    686599ee3e5a6d81e2bdaffed3c2f55e130976e0

  • SHA256

    248e524e42629178b3edef50dae4bf1017b41d919eb643c3b150092369a76d10

  • SHA512

    45688d4c8fe720fd5e09d37ce5ea434917ab85f42b4b7931802e3ea80398f4c379216415ae875a47790245bcda2171bfa0770f77b2db793b894598c60dc6d061

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    polar.argondns.net
  • Port:
    587
  • Username:
    scarz@eilze.in
  • Password:
    r_z3nttsB1+u

Targets

    • Target

      Specification and order.bat

    • Size

      499KB

    • MD5

      0d325d81cf8915fd7e534b6f87e6e2ad

    • SHA1

      1aeac4348664caaa887ad423096e55e337addfa0

    • SHA256

      6e256e754b11daba33334ad414554983fccf5df3deec805e4d75c00a02265727

    • SHA512

      ebca2362e5d131cc8fd288680d95c72d88abb5dddf57bf788f0d8b259e3561cedf85cdb295e3c97645727a459ebf2dee58d8826f56cb765f15c0a226ab1eb809

    • AgentTesla

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

    • CoreEntity .NET Packer

      A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

    • AgentTesla Payload

    • ReZer0 packer

      Detects ReZer0, a packer with multiple versions used in various campaigns.

    • 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

    • 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

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