General

  • Target

    0844c77fb975dd66016a3ce678094610256dc597740a46fce219cafcf5d21435

  • Size

    398KB

  • Sample

    220521-d34w5sgge3

  • MD5

    767dc5889e48e284acc9b53689c8e2ee

  • SHA1

    bd221edff72a0a2226d971af3f2703c815573d98

  • SHA256

    0844c77fb975dd66016a3ce678094610256dc597740a46fce219cafcf5d21435

  • SHA512

    8b2a88a079aafc8e723927821cd9fc2b8379690d2eb4320fa5943fd087810549ef4e90a3925a5d3c80d970de7d13bd68d21500550517db6f069269e529169529

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    vps36800.inmotionhosting.com
  • Port:
    587
  • Username:
    server-me@exclusivecommunities-primary.com
  • Password:
    ;D^nHzqV0,Md

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    vps36800.inmotionhosting.com
  • Port:
    587
  • Username:
    server-me@exclusivecommunities-primary.com
  • Password:
    ;D^nHzqV0,Md

Targets

    • Target

      PO.202315...pdf.exe

    • Size

      453KB

    • MD5

      7703f61f033db10e51eab07ec941b1b1

    • SHA1

      98fd781134413d6b86c5321e86152a2a524c7e30

    • SHA256

      d58a3fea3dec563fd6c1f2d7c159b25d7d161c2b7c298f9b0226953e3ccb4e36

    • SHA512

      68485c0b61de7d4d5295818db4eff9e0dd13ac0511a8ef9a04f8c70c6afd34de98548b321f3264e0c7f3a833d853a9a128779962ee524acb105d9f87783af419

    • 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.

    • suricata: ET MALWARE AgentTesla Exfil Via SMTP

      suricata: ET MALWARE AgentTesla Exfil Via SMTP

    • AgentTesla Payload

    • ReZer0 packer

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

    • 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

    • 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

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks