General

  • Target

    Signed PO.exe

  • Size

    688KB

  • Sample

    201125-qkvk5dvvge

  • MD5

    35427a284ae978c86b7eba2738564545

  • SHA1

    6b1156236111f3af9754bfea4e61afb42be7d59f

  • SHA256

    0096dc44d88cb2dc617a69d3b9fef566a848c661f00bee5a85afcb205a33aba9

  • SHA512

    d8e02ab6b6e513de4225bbb0211a1a04957760bc409a0fd6cc94a1297242d1625e81fcbbc23c1feceba481f6380ca15de77891f2b7bbd903fb53fe70093b3435

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.shirdilog.com
  • Port:
    587
  • Username:
    cs.maa@shirdilog.com
  • Password:
    SL094521

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.shirdilog.com
  • Port:
    587
  • Username:
    cs.maa@shirdilog.com
  • Password:
    SL094521

Targets

    • Target

      Signed PO.exe

    • Size

      688KB

    • MD5

      35427a284ae978c86b7eba2738564545

    • SHA1

      6b1156236111f3af9754bfea4e61afb42be7d59f

    • SHA256

      0096dc44d88cb2dc617a69d3b9fef566a848c661f00bee5a85afcb205a33aba9

    • SHA512

      d8e02ab6b6e513de4225bbb0211a1a04957760bc409a0fd6cc94a1297242d1625e81fcbbc23c1feceba481f6380ca15de77891f2b7bbd903fb53fe70093b3435

    • 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.

    • 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.

    • 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

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Tasks