Analysis

  • max time kernel
    135s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/12/2023, 18:40

General

  • Target
    850b194b11c33c595a84f1e29c2f771f.exe
  • Size 411KB
  • Sample231226-xbpspahbcp
  • SHA256 30a0e860e5edadad6650b561ab332d13b68bfe296c10871820cdc64b42c70f3e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • mercurialgrabber

C2
  • https://discord.com/api/webhooks/870291367530737705/kitCWvdskV4mesZN15sftPzdN9h7p-Y0ANa240mBlgWkIh9632aLpUK7C0zdv_guqyVv

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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • 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.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 1 IoCs
  • 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
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\850b194b11c33c595a84f1e29c2f771f.exe
    "C:\Users\Admin\AppData\Local\Temp\850b194b11c33c595a84f1e29c2f771f.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2432
    • C:\Windows\system32\cmd.exe
      "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\E3E8.tmp\E456.tmp\E457.bat C:\Users\Admin\AppData\Local\Temp\850b194b11c33c595a84f1e29c2f771f.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4340
      • C:\Users\Admin\AppData\Local\Temp\E3E8.tmp\hook.exe
        hook.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:5064
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 5064 -s 1692
          4⤵
          • Program crash
          PID:4420
      • C:\Users\Admin\AppData\Local\Temp\E3E8.tmp\hook_old.exe
        hook_old.exe
        3⤵
        • Looks for VirtualBox Guest Additions in registry
        • Looks for VMWare Tools registry key
        • Checks BIOS information in registry
        • Executes dropped EXE
        • Maps connected drives based on registry
        • Checks SCSI registry key(s)
        • Enumerates system info in registry
        • Modifies system certificate store
        • Suspicious use of AdjustPrivilegeToken
        PID:2600
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 5064 -ip 5064
    1⤵
      PID:4320

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          E457.bat

          • Path C:\Users\Admin\AppData\Local\Temp\E3E8.tmp\E456.tmp\E457.bat
          • Size 86B
          • SHA256 f2b6508bab8c37969349a11b4dbb420e5d9c59596baab57892f8ced115e44a9c
          • MD5 SHA1 SHA512

          hook.exe

          • Path C:\Users\Admin\AppData\Local\Temp\E3E8.tmp\hook.exe
          • Size 8KB
          • SHA256 d4151d291326af4254a3ce4dad5f4e05b31891bf7bb2a7ca4a0102a768c07a24
          • MD5 SHA1 SHA512 SSDEEP

          hook_old.exe

          • Path C:\Users\Admin\AppData\Local\Temp\E3E8.tmp\hook_old.exe
          • Size 139KB
          • SHA256 5893f1da289eff760f03e44b79d224203ab284956e2d4bf8f36250ad0b82ffd7
          • MD5 SHA1 SHA512 SSDEEP

          memory/2600-27-0x00007FFB4AAF0000-0x00007FFB4B5B1000-memory.dmp

          memory/2600-17-0x00007FFB4AAF0000-0x00007FFB4B5B1000-memory.dmp

          memory/2600-18-0x000000001B610000-0x000000001B620000-memory.dmp

          memory/2600-15-0x00000000009D0000-0x00000000009F8000-memory.dmp

          memory/2600-28-0x00007FFB4AAF0000-0x00007FFB4B5B1000-memory.dmp

          memory/5064-19-0x00000000749E0000-0x0000000075190000-memory.dmp

          memory/5064-20-0x0000000000570000-0x0000000000578000-memory.dmp

          memory/5064-26-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

          memory/5064-29-0x00000000749E0000-0x0000000075190000-memory.dmp

          memory/5064-30-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

          memory/5064-31-0x00000000749E0000-0x0000000075190000-memory.dmp