Analysis

  • max time kernel
    14s
  • max time network
    19s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-08-2022 22:52

General

  • Target

    arkrillia.exe

  • Size

    205KB

  • MD5

    66aff825cf20a4a56cbb6fe58813f109

  • SHA1

    a4080cb5ce0548ce62f48c05d2cbad30cc42c632

  • SHA256

    a132009149d0fb7b4ba7819bead8513632c20cb4a60714fc48c0a540b151023d

  • SHA512

    0028aaec3fda2a42d980e60a4519d1df106b865c465a2a20b75ac1173162f6911fa774978326eed5143d36c68694c60d395c3297ad800e54fed7e2c17e48b9d6

Malware Config

Extracted

Family

mercurialgrabber

C2

https://discord.com/api/webhooks/1007016849067737268/1_b8HSIrgq2JeCOH3L_DfjnxZdYrRclgRzadvbl_NmT5qaXgL7nX2ZYCcPjoGqVeN791

Signatures

  • Mercurial Grabber Stealer

    Mercurial Grabber is an open source stealer targeting Chrome, Discord and some game clients as well as generic system information.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 1 IoCs

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

  • Looks up external IP address via web service 2 IoCs

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Checks SCSI registry key(s) 3 TTPs 1 IoCs

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

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\arkrillia.exe
    "C:\Users\Admin\AppData\Local\Temp\arkrillia.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Checks SCSI registry key(s)
    • Enumerates system info in registry
    • Suspicious use of AdjustPrivilegeToken
    PID:4556

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/4556-130-0x00000000007A0000-0x00000000007D8000-memory.dmp

    Filesize

    224KB

  • memory/4556-131-0x00007FFE88E10000-0x00007FFE898D1000-memory.dmp

    Filesize

    10.8MB