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Analysis

  • max time kernel
    142s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/06/2024, 00:02

General

  • Target

    8572a8f4e9f1b4d6655a12f761558adf04ec5086d8d5304052cc9aa041186d32.exe

  • Size

    92KB

  • MD5

    984add71480cf5c831bc05a06e650f18

  • SHA1

    f1efb5c08c2d43aefcc0bfe5535eea6ba3821b63

  • SHA256

    8572a8f4e9f1b4d6655a12f761558adf04ec5086d8d5304052cc9aa041186d32

  • SHA512

    b644cf72c7f8ee18d81fdaa4b3088d30658e03931d26b28ec468c33067324671eb1347aea2125aaabfaf5fa7846797848877dcb667af438a493de63b81578cf7

  • SSDEEP

    1536:1MIPgEm56wnbkKC2ZyBJU066lwLCRVEB+nR/y8cmNrEIviCOzuajkrDl9HNSi:11PgEOng1d66jRVa+n4NmNNouukrD7HI

Malware Config

Signatures

  • Detects executables containing base64 encoded User Agent 4 IoCs
  • UPX dump on OEP (original entry point) 6 IoCs
  • Blocklisted process makes network request 8 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Kills process with taskkill 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8572a8f4e9f1b4d6655a12f761558adf04ec5086d8d5304052cc9aa041186d32.exe
    "C:\Users\Admin\AppData\Local\Temp\8572a8f4e9f1b4d6655a12f761558adf04ec5086d8d5304052cc9aa041186d32.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4856
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\tmjiubotb.exe "C:\Users\Admin\AppData\Local\Temp\8572a8f4e9f1b4d6655a12f761558adf04ec5086d8d5304052cc9aa041186d32.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2292
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:3884
      • C:\Users\Admin\AppData\Local\Temp\tmjiubotb.exe
        C:\Users\Admin\AppData\Local\Temp\\tmjiubotb.exe "C:\Users\Admin\AppData\Local\Temp\8572a8f4e9f1b4d6655a12f761558adf04ec5086d8d5304052cc9aa041186d32.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:324
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\lnonl\wboaa.baw",crc32 C:\Users\Admin\AppData\Local\Temp\tmjiubotb.exe
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2172
          • \??\c:\windows\SysWOW64\taskkill.exe
            taskkill /f /im attrib.exe
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:4556
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3804,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=4000 /prefetch:8
    1⤵
      PID:4856

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmjiubotb.exe

      Filesize

      92KB

      MD5

      b5496dd6ea7d9decc892866acdbd989a

      SHA1

      e250e7aa4af3f08ba9f81d48d91ea3659c047021

      SHA256

      6c3c136541edcb861345a783968d0d042352f0400b1890650ddac3e57720c458

      SHA512

      bee3117cd11adb1fd52f7bc737a1134cfef27a8a25a4dd79ada7eb9e460e7b34e0e07b818e9678e9148ad72ccbe2c10e3d3ca3ae9c76525dc061f2d01fb6aedc

    • \??\c:\lnonl\wboaa.baw

      Filesize

      57KB

      MD5

      2f53f49e01f09d6e6064871eec1955cd

      SHA1

      a6e1a6e5c2080d0fb2f7a872e3902a8a4a1a9b5f

      SHA256

      964e4dd2532d540bb61d3c7ccc833f2358d8cd6b2eabc3a2d51183a18b59f82d

      SHA512

      2cb98030c3df7417c04f796f78f23f96d381871d9c7ae4a14116764e915b2e2f56b9b3a6fb76fedc50a17788de9538fc7954a7b73bf17e4be43e1fc1a06bc218

    • memory/324-7-0x00000000006F0000-0x0000000000722000-memory.dmp

      Filesize

      200KB

    • memory/324-9-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB

    • memory/2172-12-0x0000000010000000-0x0000000010022000-memory.dmp

      Filesize

      136KB

    • memory/2172-13-0x0000000010000000-0x0000000010022000-memory.dmp

      Filesize

      136KB

    • memory/2172-15-0x0000000010000000-0x0000000010022000-memory.dmp

      Filesize

      136KB

    • memory/2172-17-0x0000000010000000-0x0000000010022000-memory.dmp

      Filesize

      136KB

    • memory/4856-0-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB

    • memory/4856-1-0x00000000005F0000-0x00000000005F1000-memory.dmp

      Filesize

      4KB

    • memory/4856-3-0x0000000000400000-0x0000000000428000-memory.dmp

      Filesize

      160KB