Overview

overview

8

Static

static

3

b4b9776e34...a1.exe

windows7-x64

8

b4b9776e34...a1.exe

windows10-2004-x64

8

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-04-2024 16:18

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General

  • Target

    b4b9776e34e04128c8b6dc9687c5df2d4f516812d49208a5f62fb2812caa3da1.exe

  • Size

    403KB

  • MD5

    baf16c2c158fbdd477d7f56dd15a28e8

  • SHA1

    11c539c452866e09a4bdb56aa102d8b69d99ab15

  • SHA256

    b4b9776e34e04128c8b6dc9687c5df2d4f516812d49208a5f62fb2812caa3da1

  • SHA512

    82c91d7c4c2163061fc04b3700718c64b088493057033e7f5d34bf156b0cd11e702030cc5d1546506d3592e720e6afb574b7544bcb87ff367430ebf785fa03f4

  • SSDEEP

    6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse

Score
8/10
bootkitpersistencespywarestealer

Malware Config

Signatures

  • 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.

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • 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.

    bootkitpersistence
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b4b9776e34e04128c8b6dc9687c5df2d4f516812d49208a5f62fb2812caa3da1.exe
    "C:\Users\Admin\AppData\Local\Temp\b4b9776e34e04128c8b6dc9687c5df2d4f516812d49208a5f62fb2812caa3da1.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:308
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bjsel.exe "C:\Users\Admin\AppData\Local\Temp\b4b9776e34e04128c8b6dc9687c5df2d4f516812d49208a5f62fb2812caa3da1.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2516
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:1512
      • C:\Users\Admin\AppData\Local\Temp\bjsel.exe
        C:\Users\Admin\AppData\Local\Temp\\bjsel.exe "C:\Users\Admin\AppData\Local\Temp\b4b9776e34e04128c8b6dc9687c5df2d4f516812d49208a5f62fb2812caa3da1.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4372
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\Program Files\eplqf\naqvodecj.dll",Verify C:\Users\Admin\AppData\Local\Temp\bjsel.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)
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3532

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\bjsel.exe
    Filesize

    404KB

    MD5

    a4ace48caa23f98724f41dedc45a9078

    SHA1

    7a9de58b92a27b160c631cfad134c8c34c46a525

    SHA256

    0b1a2e3dded90449d318f6f8055347f5794c7483ebc572e7c27f573eac835282

    SHA512

    565fe5527c41ff116d3326cf7405590edc40db7f1a7dab298bf9a7d730b0af5119810334bfcd27827c8a28dc5e828ae93438fa36cfa73b46198baa68a95ba40a

    Download Submit

  • \??\c:\Program Files\eplqf\naqvodecj.dll
    Filesize

    228KB

    MD5

    c05353ca101d384d604739fa69d649f0

    SHA1

    563da21a0fa5dca1e550153b4bb9320b0eed4183

    SHA256

    cb826ac3dadcb3c243f6bfb89f876059e4e39d46c3b8ee5d192cfe2ad99ca894

    SHA512

    91a7daf12a635e2f1d26006e9e3e0f2bfae7c1f78d63facf41f5fd69cc57d1022d64973120c6afbad2443a68b5a698d48e14d29224777b008c541e53e462c5d6

    Download Submit

  • memory/308-0-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download

  • memory/308-2-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download

  • memory/3532-12-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

    Download

  • memory/3532-11-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

    Download

  • memory/3532-14-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

    Download

  • memory/4372-6-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download

  • memory/4372-8-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download