Overview

overview

9

Static

static

3

c63790aa50...b2.exe

windows7-x64

9

c63790aa50...b2.exe

windows10-2004-x64

9

Analysis

  • max time kernel
    143s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-04-2024 02:41

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General

  • Target

    c63790aa506d9ce3119b82414a0b1afd1f8cfbc2887bbdf987dea1d19205f5b2.exe

  • Size

    210KB

  • MD5

    dc49b618cc414c7bb8eb51d83cff719d

  • SHA1

    47c7bb2c52be285a9f764a0478d86479c635fe3d

  • SHA256

    c63790aa506d9ce3119b82414a0b1afd1f8cfbc2887bbdf987dea1d19205f5b2

  • SHA512

    b11385906a482fdd923a0f788190ca6b164964aec86d7db068f2978d64bbab301884c81820542520b9e9b3dc280373892f5e3091de565940fdd172bab8c032ad

  • SSDEEP

    6144:uVtV0QPQCnSQsTEWYChnUnPJuHC3vcWY:ubVQk1wnGACvc

Score
9/10
bootkitpersistencespywarestealer

Malware Config

Signatures

  • Detects executables containing base64 encoded User Agent 2 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 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
  • Drops file in Program Files directory 4 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 4 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\c63790aa506d9ce3119b82414a0b1afd1f8cfbc2887bbdf987dea1d19205f5b2.exe
    "C:\Users\Admin\AppData\Local\Temp\c63790aa506d9ce3119b82414a0b1afd1f8cfbc2887bbdf987dea1d19205f5b2.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3684
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yiioc.exe "C:\Users\Admin\AppData\Local\Temp\c63790aa506d9ce3119b82414a0b1afd1f8cfbc2887bbdf987dea1d19205f5b2.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3360
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:4940
      • C:\Users\Admin\AppData\Local\Temp\yiioc.exe
        C:\Users\Admin\AppData\Local\Temp\\yiioc.exe "C:\Users\Admin\AppData\Local\Temp\c63790aa506d9ce3119b82414a0b1afd1f8cfbc2887bbdf987dea1d19205f5b2.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1124
        • \??\c:\Program Files\aftni\ybntbtmr.exe
          "c:\Program Files\aftni\ybntbtmr.exe" "c:\Program Files\aftni\ybntbtmr.dll",Group C:\Users\Admin\AppData\Local\Temp\yiioc.exe
          4⤵
          • Executes dropped EXE
          • 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
          PID:2088

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files\aftni\ybntbtmr.exe
    Filesize

    60KB

    MD5

    889b99c52a60dd49227c5e485a016679

    SHA1

    8fa889e456aa646a4d0a4349977430ce5fa5e2d7

    SHA256

    6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

    SHA512

    08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

    Download Submit
  • C:\Users\Admin\AppData\Local\Temp\yiioc.exe
    Filesize

    210KB

    MD5

    a51cc526901012b6d9310593b89c8939

    SHA1

    cd7ccca5154e411296054ec8c77eea17694de8b5

    SHA256

    8e2c98d6a98015f50347f9d7d389735bbfd86466be6fdc10c03678b6f1c9f218

    SHA512

    eea3621b71447c301e199a775d94e21bf4b91848ea9b3e3fddf0df12761ed4f2ab872abec068686d63543705a8a29a3dbda627046d77496b32721d1cf1ad5985

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  • \??\c:\Program Files\aftni\ybntbtmr.dll
    Filesize

    148KB

    MD5

    c3f4597482d058d171cc1dcc4a951b33

    SHA1

    91b3920ffe039a3eec558272e44689821c440309

    SHA256

    2c7ff0da67f79c5dee3edbceb32737e1a0cc6a641f715b0a9c07eda56db92ef2

    SHA512

    ce6cd6d55982dca4fbc50c257ed187c33150605f21ca0f0cc36c1622c4f9ee55bd8e9481ce67fb2ba16b572f9b80bb62d4781eed836fcbfd8adb79f01ccce27e

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  • memory/1124-6-0x0000000000400000-0x0000000000479D2E-memory.dmp
    Filesize

    487KB

    Download
  • memory/1124-11-0x0000000000400000-0x0000000000479D2E-memory.dmp
    Filesize

    487KB

    Download
  • memory/2088-15-0x0000000010000000-0x0000000010054000-memory.dmp
    Filesize

    336KB

    Download
  • memory/2088-16-0x0000000010000000-0x0000000010054000-memory.dmp
    Filesize

    336KB

    Download
  • memory/2088-18-0x0000000010000000-0x0000000010054000-memory.dmp
    Filesize

    336KB

    Download
  • memory/3684-0-0x0000000000400000-0x0000000000479D2E-memory.dmp
    Filesize

    487KB

    Download
  • memory/3684-2-0x0000000000400000-0x0000000000479D2E-memory.dmp
    Filesize

    487KB

    Download