General

  • Target

    7897e911d239da273fe44e59a835380795e52ce59e96bda1740c3ae7d63aae9c

  • Size

    417KB

  • Sample

    220521-all38adchn

  • MD5

    30c298f2c2a4b19e29544fc435be5c70

  • SHA1

    56457d9a1572eab1cc38074fd107db8b1ca0578f

  • SHA256

    7897e911d239da273fe44e59a835380795e52ce59e96bda1740c3ae7d63aae9c

  • SHA512

    52ae2dececa92ad34329d4d32a4a0b29785ea581e01b380076131a702ed5ac6cfc02822d195dbf296098d6769cb45920f212d20502d8b6e9a5cd5571b341d16a

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.rajalakshmi.co.in
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    009_DESign1*

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.rajalakshmi.co.in
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    009_DESign1*

Targets

    • Target

      yUJ6pfrBT92ChKS.exe

    • Size

      529KB

    • MD5

      8c32f596fbd2f52b34d1c891a0559493

    • SHA1

      67b0750eef95d840137b274a0c486c7cb63a0601

    • SHA256

      25387e5ca0782bee6e0d9aa279453187cbee9d86bfa0fca6246725ff20f45f92

    • SHA512

      9b627e1377bb4ef33de88ab2ab62de22222f53e625793cdff218526afe78e105b140fc997de06639a26b85fc57852a0d3fcd7481ae4d838a42cc5b1dbb7625c0

    • AgentTesla

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

    • suricata: ET MALWARE AgentTesla Exfil Via SMTP

      suricata: ET MALWARE AgentTesla Exfil Via SMTP

    • 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