General

  • Target

    RNSM00386.7z

  • Size

    8.4MB

  • Sample

    241103-1vjmkawajh

  • MD5

    a31afb786fd93be121f890a82bebdc9c

  • SHA1

    8528f8f9141eda1a4940172f0adef6e9c05ffba7

  • SHA256

    3de5223ca74c4b449c7d4da7e586077e014ee421689f37e2e96505800ccd9f73

  • SHA512

    5a117fc7c3418c3090ef80582bf10bf097289949688503152bef07f3b5e2adb730d1aa2c51a3e862f44842bc6c7a5b9234b4846fe413332b33532975b589e267

  • SSDEEP

    196608:f+FZZP/1r1bGN0JNhKex/2wUwTdNHI05qp3Q2cl:qZZHd1gMNUg2wJboOq1C

Malware Config

Extracted

Family

azorult

C2

http://boec.ubksg.ru/index.php

Targets

    • Target

      RNSM00386.7z

    • Size

      8.4MB

    • MD5

      a31afb786fd93be121f890a82bebdc9c

    • SHA1

      8528f8f9141eda1a4940172f0adef6e9c05ffba7

    • SHA256

      3de5223ca74c4b449c7d4da7e586077e014ee421689f37e2e96505800ccd9f73

    • SHA512

      5a117fc7c3418c3090ef80582bf10bf097289949688503152bef07f3b5e2adb730d1aa2c51a3e862f44842bc6c7a5b9234b4846fe413332b33532975b589e267

    • SSDEEP

      196608:f+FZZP/1r1bGN0JNhKex/2wUwTdNHI05qp3Q2cl:qZZHd1gMNUg2wJboOq1C

    • Azorult

      An information stealer that was first discovered in 2016, targeting browsing history and passwords.

    • Azorult family

    • Jigsaw Ransomware

      Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.

    • Jigsaw family

    • Troldesh family

    • Troldesh, Shade, Encoder.858

      Troldesh is a ransomware spread by malspam.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Renames multiple (109) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Modifies Windows Firewall

    • Checks BIOS information in registry

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

    • Checks computer location settings

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

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Drops startup file

    • Executes dropped EXE

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • Impair Defenses: Safe Mode Boot

    • 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

    • Checks installed software on the system

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

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Indicator Removal: File Deletion

      Adversaries may delete files left behind by the actions of their intrusion activity.

    • Legitimate hosting services abused for malware hosting/C2

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

MITRE ATT&CK Enterprise v15

Tasks