General

  • Target

    Infected.exe

  • Size

    63KB

  • Sample

    250228-vrmbdstk17

  • MD5

    4283bcbe5bea251f8568efc572d431dd

  • SHA1

    dee1cb4e0519ebcf092161ff125902aca428a4f1

  • SHA256

    cfcc492a4c21493b0a1ca52ed0a0552f3388dabb40bfa1db94061269fe3afa4f

  • SHA512

    2270742d31151236ff0a80b9a371a63bfe6bac8e8622a498324c9956711e31292ec61b95714a9f91f5dd9178eb1c22d43a82a7a81e8e0675a4b8bfee1e1296b4

  • SSDEEP

    768:iqWcYBjjj78ZIC8A+X0iazcBRL5JTk1+T4KSBGHmDbD/ph0oXhpwq5vNlSuwdpqM:MZjLXdSJYUbdh9/DvKuwdpqKmY7

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

6.tcp.ngrok.io:17720

Attributes
  • delay

    1

  • install

    true

  • install_file

    sigma.exe

  • install_folder

    %AppData%

aes.plain

Targets

    • Target

      Infected.exe

    • Size

      63KB

    • MD5

      4283bcbe5bea251f8568efc572d431dd

    • SHA1

      dee1cb4e0519ebcf092161ff125902aca428a4f1

    • SHA256

      cfcc492a4c21493b0a1ca52ed0a0552f3388dabb40bfa1db94061269fe3afa4f

    • SHA512

      2270742d31151236ff0a80b9a371a63bfe6bac8e8622a498324c9956711e31292ec61b95714a9f91f5dd9178eb1c22d43a82a7a81e8e0675a4b8bfee1e1296b4

    • SSDEEP

      768:iqWcYBjjj78ZIC8A+X0iazcBRL5JTk1+T4KSBGHmDbD/ph0oXhpwq5vNlSuwdpqM:MZjLXdSJYUbdh9/DvKuwdpqKmY7

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Asyncrat family

    • Stealerium

      An open source info stealer written in C# first seen in May 2022.

    • Stealerium family

    • Async RAT payload

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses Microsoft Outlook profiles

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Looks up geolocation information via web service

      Uses a legitimate geolocation service to find the infected system's geolocation info.

    • Network Service Discovery

      Attempt to gather information on host's network.

    • Enumerates processes with tasklist

MITRE ATT&CK Enterprise v15

Tasks