Analysis

  • max time kernel
    92s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-12-2023 13:15

General

  • Target

    b1604839b3dace254776abbfbc9502a3.exe

  • Size

    328KB

  • MD5

    b1604839b3dace254776abbfbc9502a3

  • SHA1

    ab057d68f800f597305b61980faf1c495b27588c

  • SHA256

    57e2778ab304e430ef5d6dd3d61f0dc26517cb6f0ea50f8eef0205fe6d6f4704

  • SHA512

    79db1e113d7ff7372b697677e545f837d7b1f7fea7a11600ecd8d8a071034add642adf58675ea200926c22e35b39ce874414f11bf73b64cab4594f3066388a51

  • SSDEEP

    6144:ajT5Zh17eWxoG/+ov/2OIQ4wW3OBsCeAW32X+t4RbUn+KqB7:aRZ+IoG/n9IQxW3OBsee2X+t4RbU+HB7

Malware Config

Extracted

Family

mercurialgrabber

C2

https://discord.com/api/webhooks/868559352003457034/dTdMLqh4_IpORTEPiHVx21-wA3YbOpblaXGNdGfU4SRujvYBPDaL2uE4H_TU8o2uW1KU

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 1 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 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.

  • Enumerates physical storage devices 1 TTPs

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

  • 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
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b1604839b3dace254776abbfbc9502a3.exe
    "C:\Users\Admin\AppData\Local\Temp\b1604839b3dace254776abbfbc9502a3.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4932
    • C:\Users\Admin\AppData\Local\Temp\Image Logger.exe
      "C:\Users\Admin\AppData\Local\Temp\Image Logger.exe"
      2⤵
      • 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)
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious use of AdjustPrivilegeToken
      PID:1492

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Image Logger.exe

    Filesize

    41KB

    MD5

    b9eefe47446164d047d1d5e1da6899cd

    SHA1

    54c21fc33ca44c2fcbb431c3aad30b49ef947be9

    SHA256

    145ce805304271d9e11ba8c5aac53a92c2bd956cc5055f4e2edf028a4822b731

    SHA512

    83ee4b48bc72ce23453d564a9b083029a60ab351b601e254cd3fd1bce2b4cde21677d273ff449f1fd703ce3f736c0bfdee3bb4b2f5b5d0c82101222631997b07

  • memory/1492-14-0x0000000000390000-0x00000000003A0000-memory.dmp

    Filesize

    64KB

  • memory/1492-15-0x00007FF85FF70000-0x00007FF860A31000-memory.dmp

    Filesize

    10.8MB

  • memory/1492-16-0x000000001B080000-0x000000001B090000-memory.dmp

    Filesize

    64KB

  • memory/1492-17-0x00007FF85FF70000-0x00007FF860A31000-memory.dmp

    Filesize

    10.8MB

  • memory/1492-21-0x000000001B080000-0x000000001B090000-memory.dmp

    Filesize

    64KB

  • memory/1492-22-0x00007FF85FF70000-0x00007FF860A31000-memory.dmp

    Filesize

    10.8MB