General

  • Target

    proxy.txt

  • Size

    491KB

  • Sample

    230311-1jlmsabd46

  • MD5

    2cd54c149b6b96b1c52c36982b6545b9

  • SHA1

    c39a3b7b55dfb66abb02999f64cae3d8f9db7a83

  • SHA256

    c22543e8c5c5dcdc21b7f410526f9dbec9de61c7ce3a2f24087c7ccfbbfdf65a

  • SHA512

    9e7611d9c8c0137d17374cdffe74a22deeeff057dc110555df67dfc98d0f3b6509cdbc39d87ce5159f9e8de98c7d47b100a97ab06598d828dedf526114d4ac44

  • SSDEEP

    3072:eHIJE87YlnkAgSbavgiQzrRyTbooKj4HSxaocRGDiOCRgk4:EVvevgtztWK8SxrRD+gd

Malware Config

Targets

    • Target

      proxy.txt

    • Size

      491KB

    • MD5

      2cd54c149b6b96b1c52c36982b6545b9

    • SHA1

      c39a3b7b55dfb66abb02999f64cae3d8f9db7a83

    • SHA256

      c22543e8c5c5dcdc21b7f410526f9dbec9de61c7ce3a2f24087c7ccfbbfdf65a

    • SHA512

      9e7611d9c8c0137d17374cdffe74a22deeeff057dc110555df67dfc98d0f3b6509cdbc39d87ce5159f9e8de98c7d47b100a97ab06598d828dedf526114d4ac44

    • SSDEEP

      3072:eHIJE87YlnkAgSbavgiQzrRyTbooKj4HSxaocRGDiOCRgk4:EVvevgtztWK8SxrRD+gd

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Downloads MZ/PE file

    • Modifies Installed Components in the registry

    • Sets file execution options in registry

    • Checks computer location settings

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

    • 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.

    • Registers COM server for autorun

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Drops desktop.ini file(s)

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Legitimate hosting services abused for malware hosting/C2

    • Checks system information in the registry

      System information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

4
T1060

Browser Extensions

1
T1176

Defense Evasion

Modify Registry

6
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

5
T1012

System Information Discovery

6
T1082

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks