General

  • Target

    tmp/41c6f9cd-7d7d-4161-80c0-a3b961a113ba_vbc.exe

  • Size

    350KB

  • Sample

    211216-vtm1pscee3

  • MD5

    033304a9a935c4d0d64769245abfe3ae

  • SHA1

    ebe539aeb57b78a3ad8085fe61dcc5ce3bfb6fd9

  • SHA256

    6500927c19e228cc116484a103ba594fdeadccf06159332ead8cc9b3d9da83db

  • SHA512

    f9da9c01941b5694c46d9b8f1fb4d4710a025409b672eb62ca913979f0aa26fc1ac8eb922388c4c29c8f7405ad268a871221cd38b0494c18936612756af021c0

Malware Config

Targets

    • Target

      tmp/41c6f9cd-7d7d-4161-80c0-a3b961a113ba_vbc.exe

    • Size

      350KB

    • MD5

      033304a9a935c4d0d64769245abfe3ae

    • SHA1

      ebe539aeb57b78a3ad8085fe61dcc5ce3bfb6fd9

    • SHA256

      6500927c19e228cc116484a103ba594fdeadccf06159332ead8cc9b3d9da83db

    • SHA512

      f9da9c01941b5694c46d9b8f1fb4d4710a025409b672eb62ca913979f0aa26fc1ac8eb922388c4c29c8f7405ad268a871221cd38b0494c18936612756af021c0

    • AgentTesla

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

    • Modifies system executable filetype association

    • Neshta

      Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

    • AgentTesla Payload

    • Executes dropped EXE

    • Loads dropped DLL

    • 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

Change Default File Association

1
T1042

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks