General

  • Target

    RFQ for the supply of materialsservices for P.O. No. - 4700001838.exe

  • Size

    2.2MB

  • Sample

    210125-nw26e54mvn

  • MD5

    5ff5bbb9fd1f1d3a586ad9bea10a9773

  • SHA1

    1426737ae0a2039a85e9683aad4e1fc6b2d5a27b

  • SHA256

    a12c65ad23f195521f525ed905373f22fe0853c1e1fcfb317056d81051e6e532

  • SHA512

    aa21b5424ff194d35552e25a64a96d29c50229bc2281964a62c82069f38e956592d4099e99e682c859d9ab36165c80bf63b26dac11e9c7d1ca1ec63c84a547fe

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.newviking.com.my
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    {&SgX:^(7m

Targets

    • Target

      RFQ for the supply of materialsservices for P.O. No. - 4700001838.exe

    • Size

      2.2MB

    • MD5

      5ff5bbb9fd1f1d3a586ad9bea10a9773

    • SHA1

      1426737ae0a2039a85e9683aad4e1fc6b2d5a27b

    • SHA256

      a12c65ad23f195521f525ed905373f22fe0853c1e1fcfb317056d81051e6e532

    • SHA512

      aa21b5424ff194d35552e25a64a96d29c50229bc2281964a62c82069f38e956592d4099e99e682c859d9ab36165c80bf63b26dac11e9c7d1ca1ec63c84a547fe

    • AgentTesla

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

    • Modifies WinLogon for persistence

    • Modifies Windows Defender Real-time Protection settings

    • Turns off Windows Defender SpyNet reporting

    • Windows security bypass

    • 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.

    • Drops startup file

    • 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.

    • Windows security modification

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

6
T1112

Disabling Security Tools

4
T1089

Virtualization/Sandbox Evasion

2
T1497

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

Command and Control

Web Service

1
T1102

Tasks