General

  • Target

    f8af8abbc8f548cdafd52141da22837e08037ce08bed6fe73d06b8d0db179170

  • Size

    389KB

  • Sample

    220521-b84gfsgebn

  • MD5

    b2ba3f49bbfb9ac0beb0b08ff27412f3

  • SHA1

    1e3f32a26981bc7e8f37a959a091aec3b47abda8

  • SHA256

    f8af8abbc8f548cdafd52141da22837e08037ce08bed6fe73d06b8d0db179170

  • SHA512

    846e573efbd8b206c3271c8873ea9a266bdc88cca5e1306b0afb768df8b2cb657acc5ce96c50ca82e966e1035edd51557bf0765bdc158104d88d51a4c4c34405

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Qazxsw@123

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Qazxsw@123

Targets

    • Target

      Swift copy1.exe

    • Size

      455KB

    • MD5

      4adc219c3c2aad7ea21285ec668371f4

    • SHA1

      beb65fd7b3f5794c2c3d145a2628d8eef8550372

    • SHA256

      64b28b68cc4d6eefe5d4aa2067b0fc9465ec964138c2b199cb8b235a8988bc55

    • SHA512

      8448afe32f1d23e7c591170aabe37cffdc972d079a4299108ab3e1706d6032fbc7aec7e958ba66a09c31a784feec857d5e4621d262bd7aaec588403baa5cbbec

    • 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

    • Adds Run key to start application

    • 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

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

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