Resubmissions

17-04-2023 11:35

230417-nqbpyadh76 10

23-02-2023 15:13

230223-slr9caab3w 10

General

  • Target

    tmp

  • Size

    25KB

  • Sample

    230223-slr9caab3w

  • MD5

    30b5426ee9183f43fba9a8a6b6b32b97

  • SHA1

    d0b8cde6d8c38e294ce6275b0f935677b07d2202

  • SHA256

    e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0

  • SHA512

    adef79c0748b1e8c274f93879c1c068e0d54b88de94fbb01d4d51bd222a6493f8d2cc68f53adab5407bd59249dfa2fdbc8f511bbec3613772591b0ea4d79afaf

  • SSDEEP

    96:jFQgbeIBVLyrgoJ/sTfNILBevmXR5MMRWnwLoLEk8LfjNiRB4e3T3ew5tvEzNt:jFhyIaUo/sTfNILwEfdRTLat8LLGTvu

Malware Config

Extracted

Family

purecrypter

C2

http://argentum.com.br/well-known/acme-challenge/k/h/d/g/Pjogwzrhh.bmp

http://argentum.com.br/well-known/acme-challenge/k/h/d/g/Xzcrd.png

Targets

    • Target

      tmp

    • Size

      25KB

    • MD5

      30b5426ee9183f43fba9a8a6b6b32b97

    • SHA1

      d0b8cde6d8c38e294ce6275b0f935677b07d2202

    • SHA256

      e18cf6502122b168dac6c932cd89739e313154ee9b73d6ddd692d4ad990aceb0

    • SHA512

      adef79c0748b1e8c274f93879c1c068e0d54b88de94fbb01d4d51bd222a6493f8d2cc68f53adab5407bd59249dfa2fdbc8f511bbec3613772591b0ea4d79afaf

    • SSDEEP

      96:jFQgbeIBVLyrgoJ/sTfNILBevmXR5MMRWnwLoLEk8LfjNiRB4e3T3ew5tvEzNt:jFhyIaUo/sTfNILwEfdRTLat8LLGTvu

    • AgentTesla

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

    • Detects Smokeloader packer

    • PureCrypter

      PureCrypter is a .NET malware loader first seen in early 2021.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks