Analysis

  • max time kernel
    126s
  • max time network
    115s
  • platform
    windows10-1703_x64
  • resource
    win10-20240221-en
  • resource tags

    arch:x64arch:x86image:win10-20240221-enlocale:en-usos:windows10-1703-x64system
  • submitted
    29-03-2024 09:03

General

  • Target

    working key/working key/working key.exe

  • Size

    42KB

  • MD5

    ff14bb3b31fee2eab5895bf147692528

  • SHA1

    2ee91155e0d48944c7bfc2345b0989d321d3b51e

  • SHA256

    ad2dc3e2cf9bbcff6fca8645731850e33d9f5dd19a2e864aa611c7e5cf50639b

  • SHA512

    ba5daf2fb2de19bbc2b0f038d32e720297e7b3ccd3ddea30b023ea77bec97705e949c0590d8568865e27001e7be27c9d2cd8bdc42aa4e1029bac36fd4a6f2d14

  • SSDEEP

    768:iuA5Ehi4//4MbuZAuL5vTjtKZKfgm3EhgZ:wE0aDsL5vTJF7EeZ

Malware Config

Extracted

Family

mercurialgrabber

C2

https://discord.com/api/webhooks/1223007453780775012/RmQhlmaS6I4pA1jXRQPJVPP5zpVjnzimQ1bM_90lRDIoExo4TSHsD7rxDV2WS0GJ9Ema

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 4 IoCs
  • 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.

  • 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
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\working key\working key\working key.exe
    "C:\Users\Admin\AppData\Local\Temp\working key\working key\working key.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
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    PID:816
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:820

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/816-0-0x0000000000BD0000-0x0000000000BE0000-memory.dmp

      Filesize

      64KB

    • memory/816-1-0x00007FFAB2650000-0x00007FFAB303C000-memory.dmp

      Filesize

      9.9MB

    • memory/816-2-0x0000000001360000-0x0000000001370000-memory.dmp

      Filesize

      64KB

    • memory/816-5-0x00007FFAB2650000-0x00007FFAB303C000-memory.dmp

      Filesize

      9.9MB

    • memory/816-6-0x0000000001360000-0x0000000001370000-memory.dmp

      Filesize

      64KB