General

  • Target

    SecuriteInfo.com.Exploit.Rtf.Obfuscated.32.15559.24662.rtf

  • Size

    33KB

  • Sample

    221205-t38s4agb75

  • MD5

    b37b91e94861e4515bf3d78328f73ba5

  • SHA1

    688fb6633a4c08529231e69d5e7ec331f5bbbddd

  • SHA256

    6a5116dae3e3873885e1a98b06af60d65ff2da2e7971eedcff92ab965b7f74a0

  • SHA512

    eb01c892c4f17936818ec7017e195368a032740e447cd1417d39707bc9e06b2b8e0afc38b099363fa477685fbfb426f546539f9c322c27131dc066a83c2a2fa2

  • SSDEEP

    768:nFx0XaIsnPRIa4fwJMBq9atgaqkvoLCMN5rHBMNBy1x3:nf0Xvx3EMEkyaqsaCMb+By1x3

Malware Config

Extracted

Credentials

  • Protocol:
    ftp
  • Host:
    ftp.valvulasthermovalve.cl
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    LILKOOLL14!!

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.valvulasthermovalve.cl/
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    LILKOOLL14!!

Targets

    • Target

      SecuriteInfo.com.Exploit.Rtf.Obfuscated.32.15559.24662.rtf

    • Size

      33KB

    • MD5

      b37b91e94861e4515bf3d78328f73ba5

    • SHA1

      688fb6633a4c08529231e69d5e7ec331f5bbbddd

    • SHA256

      6a5116dae3e3873885e1a98b06af60d65ff2da2e7971eedcff92ab965b7f74a0

    • SHA512

      eb01c892c4f17936818ec7017e195368a032740e447cd1417d39707bc9e06b2b8e0afc38b099363fa477685fbfb426f546539f9c322c27131dc066a83c2a2fa2

    • SSDEEP

      768:nFx0XaIsnPRIa4fwJMBq9atgaqkvoLCMN5rHBMNBy1x3:nf0Xvx3EMEkyaqsaCMb+By1x3

    • AgentTesla

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

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Exploitation for Client Execution

1
T1203

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks