Analysis

  • max time kernel
    59s
  • max time network
    64s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-07-2022 04:57

General

  • Target

    Advanced Nitro API.exe

  • Size

    47KB

  • MD5

    aae7abf715b5b8ee8a08a521516d66e6

  • SHA1

    a831f039ff85dc6262160d9a720c6ac2eb908f0d

  • SHA256

    0832d0859690aaba144ae8236e2d1691a75c70014b5e6fc334b4454b9bd21da0

  • SHA512

    b20b3cdf6224059b5c583b49f9d8b56088a321da7fb7037341c2b66fc8e00cb4d78829eba91b5b0290d749bfd96457045d591128a1cdb5003b1325ccae8aed78

Malware Config

Extracted

Family

mercurialgrabber

C2

https://discord.com/api/webhooks/997479196320346172/o8wW7M05djH9Rng6qbMt92uJUrOQgwKkrXi1BoNdLsfdvPAteHRGLJfhIda5f5KEIS5l

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.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 3 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.

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

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor 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\Advanced Nitro API.exe
    "C:\Users\Admin\AppData\Local\Temp\Advanced Nitro API.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)
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious use of AdjustPrivilegeToken
    PID:2920
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2920 -s 2148
      2⤵
      • Program crash
      PID:3120
  • C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -pss -s 452 -p 2920 -ip 2920
    1⤵
      PID:4060

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2920-130-0x0000000000A60000-0x0000000000A70000-memory.dmp

      Filesize

      64KB

    • memory/2920-131-0x00007FF842D30000-0x00007FF8437F1000-memory.dmp

      Filesize

      10.8MB

    • memory/2920-132-0x00007FF842D30000-0x00007FF8437F1000-memory.dmp

      Filesize

      10.8MB