General

  • Target

    CryptoFactory.exe

  • Size

    5.9MB

  • Sample

    240702-rsnztswgnf

  • MD5

    1794529e9ab95420902212d29533f2e5

  • SHA1

    3c6b517092407bd0027d76b03bc15b3e81f2b7d1

  • SHA256

    c978fbdd5ce89e672a624c74e03fa89e0865b20e8bc84b0a882eb327abb96064

  • SHA512

    e6a0f2b1d037def332ac11f5d1462434427857e2adfd50c29f25adb5aa2b8b21b867de971e35c628033a08679c4f4259e9119ff3a72f2feed4203c9cc9481285

  • SSDEEP

    98304:wJGOYln80EisK9yJND14r0Uhmkl1qa1Egu2Wh/X9Tm0OXcPwQESF/IKc6:aFqnPEZZzeJmkl1qHd2i/9TjElH8QKc

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot6082381502:AAEEe5dVvSMdEf-_fKUh7iRqcNun3Q5DzxM/sendMessage?chat_id=5795480469

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Targets

    • Target

      CryptoFactory.exe

    • Size

      5.9MB

    • MD5

      1794529e9ab95420902212d29533f2e5

    • SHA1

      3c6b517092407bd0027d76b03bc15b3e81f2b7d1

    • SHA256

      c978fbdd5ce89e672a624c74e03fa89e0865b20e8bc84b0a882eb327abb96064

    • SHA512

      e6a0f2b1d037def332ac11f5d1462434427857e2adfd50c29f25adb5aa2b8b21b867de971e35c628033a08679c4f4259e9119ff3a72f2feed4203c9cc9481285

    • SSDEEP

      98304:wJGOYln80EisK9yJND14r0Uhmkl1qa1Egu2Wh/X9Tm0OXcPwQESF/IKc6:aFqnPEZZzeJmkl1qHd2i/9TjElH8QKc

    • AsyncRat

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

    • StormKitty

      StormKitty is an open source info stealer written in C#.

    • StormKitty payload

    • Async RAT payload

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks