Overview

overview

10

Static

static

10

RBF.exe

windows7-x64

10

RBF.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    01-09-2024 14:59

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General

  • Target

    RBF.exe

  • Size

    41KB

  • MD5

    09d12c328c88bfdfef9dcc0927dca671

  • SHA1

    4f61a36bc05dbd9229b56db5ead4ea3d37e4308a

  • SHA256

    64e772d1da472d9da1dde4d9b070c1d9acf98d9819ec04058a0161f020022e49

  • SHA512

    4774119f1eb6f3f712fc29f7c7cceb31a67c62c01a6b7f09ccf17a85a4d78b3fed4f3a9532c353490f9058aae5db58d305a92a65a8e8039e7c123f48e73d1d51

  • SSDEEP

    768:escGoAxWdPN+wauZLePWTjZKZKfgm3Ehpe:tcVdPN9ePWTVF7Ebe

Score
10/10
mercurialgrabberevasionspywarestealer

Malware Config

Extracted

Family

mercurialgrabber

C2

https://discord.com/api/webhooks/975244014364270683/FZnH_sfT1E7Axl_7pfCffp86xK6BWVM_UXXb74CN2p4kpHxH_6kuQsuzlglxNPVfnIm6

Signatures

  • Mercurial Grabber Stealer

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

    stealermercurialgrabber
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
    evasion
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
    evasion
  • 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.

    spywarestealer
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • 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.

  • 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 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RBF.exe
    "C:\Users\Admin\AppData\Local\Temp\RBF.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
    • Suspicious use of WriteProcessMemory
    PID:2248
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2248 -s 1336
      2⤵
        PID:2544

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2248-0-0x000007FEF6273000-0x000007FEF6274000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2248-1-0x0000000000060000-0x0000000000070000-memory.dmp

      Filesize

      64KB

      Download

    • memory/2248-2-0x000007FEF6270000-0x000007FEF6C5C000-memory.dmp

      Filesize

      9.9MB

      Download

    • memory/2248-3-0x000007FEF6273000-0x000007FEF6274000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2248-4-0x000007FEF6270000-0x000007FEF6C5C000-memory.dmp

      Filesize

      9.9MB

      Download