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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
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 10 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 6 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 19 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:1908
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pssip.exe "C:\Users\Admin\AppData\Local\Temp\b4b9776e34e04128c8b6dc9687c5df2d4f516812d49208a5f62fb2812caa3da1.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2992
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:2596
      • C:\Users\Admin\AppData\Local\Temp\pssip.exe
        C:\Users\Admin\AppData\Local\Temp\\pssip.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:2996
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\Program Files\vrzoz\fkehdnsin.dll",Verify C:\Users\Admin\AppData\Local\Temp\pssip.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:2832

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \??\c:\Program Files\vrzoz\fkehdnsin.dll
    Filesize

    228KB

    MD5

    d6487e40aa9185c79dcf42a92980c750

    SHA1

    58e143e89ca54aeab27fb5b2a81a917e4d578364

    SHA256

    c62072533273204a23c16d59cef5f27e2628128b42984a3f5400e4cda188593c

    SHA512

    0b52f55718a82e49ed324da6164495acda28ff54c2e025b2cdba7089bb94a1fbea691e2df5c332c8fa31c368ec57a5eaeca8260ce3b4d9d67e56918d4d7dcb33

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  • \Users\Admin\AppData\Local\Temp\pssip.exe
    Filesize

    404KB

    MD5

    8c9be231b1358a4a4675bd06488753c3

    SHA1

    6b6880977a9b54c1e541705f8a7a1ded27999de1

    SHA256

    b292dbd6331a5c755ec4048039a5d2d7686b0e752e107fafd4740852e4d1f94a

    SHA512

    c6904581fd463e16c1b0e1c805c2eb94a130f450b099d7b4df0d7b600a92c9250cf4708cf56e7c0d103481def3bac8d042930262a3e320d2d43a6d670991196e

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  • memory/1908-0-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download

  • memory/1908-2-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download

  • memory/2832-17-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

    Download

  • memory/2832-18-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

    Download

  • memory/2832-20-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

    Download

  • memory/2992-7-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download

  • memory/2992-8-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download

  • memory/2996-9-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download

  • memory/2996-11-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

    Download