Analysis

  • max time kernel
    44s
  • max time network
    100s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    24-05-2022 14:28

General

  • Target

    86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c.exe

  • Size

    215KB

  • MD5

    e3149d988edfdabe27e8a4902a784d2a

  • SHA1

    ab259a9c37c60698a2544297671b39235df1aaae

  • SHA256

    86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c

  • SHA512

    865e5f67cab098860ac2598831c564691e90966d015080279eac1fac5ee4c73cc85975498da61833a74f0ea03020418c354aa7b96312ca53eed7e331cf658878

Score
10/10

Malware Config

Extracted

Family

buer

C2

https://217.8.117.20:4443/

http://217.8.117.20:8080/

Signatures

  • Buer

    Buer is a new modular loader first seen in August 2019.

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Buer Loader 3 IoCs

    Detects Buer loader in memory or disk.

  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c.exe
    "C:\Users\Admin\AppData\Local\Temp\86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\ProgramData\UBlockPlugin\plugin.exe
      C:\ProgramData\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c.exe" ensgJJ
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Deletes itself
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1152
      • C:\Windows\SysWOW64\secinit.exe
        C:\ProgramData\UBlockPlugin\plugin.exe
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:832
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 832 -s 136
          4⤵
          • Program crash
          PID:1872

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\UBlockPlugin\plugin.exe

    Filesize

    215KB

    MD5

    e3149d988edfdabe27e8a4902a784d2a

    SHA1

    ab259a9c37c60698a2544297671b39235df1aaae

    SHA256

    86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c

    SHA512

    865e5f67cab098860ac2598831c564691e90966d015080279eac1fac5ee4c73cc85975498da61833a74f0ea03020418c354aa7b96312ca53eed7e331cf658878

  • C:\ProgramData\UBlockPlugin\plugin.exe

    Filesize

    215KB

    MD5

    e3149d988edfdabe27e8a4902a784d2a

    SHA1

    ab259a9c37c60698a2544297671b39235df1aaae

    SHA256

    86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c

    SHA512

    865e5f67cab098860ac2598831c564691e90966d015080279eac1fac5ee4c73cc85975498da61833a74f0ea03020418c354aa7b96312ca53eed7e331cf658878

  • \ProgramData\UBlockPlugin\plugin.exe

    Filesize

    215KB

    MD5

    e3149d988edfdabe27e8a4902a784d2a

    SHA1

    ab259a9c37c60698a2544297671b39235df1aaae

    SHA256

    86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c

    SHA512

    865e5f67cab098860ac2598831c564691e90966d015080279eac1fac5ee4c73cc85975498da61833a74f0ea03020418c354aa7b96312ca53eed7e331cf658878

  • \ProgramData\UBlockPlugin\plugin.exe

    Filesize

    215KB

    MD5

    e3149d988edfdabe27e8a4902a784d2a

    SHA1

    ab259a9c37c60698a2544297671b39235df1aaae

    SHA256

    86ff58151ec691f3072cdf6226c7b356537022a2d1b7a73e63aeee639346933c

    SHA512

    865e5f67cab098860ac2598831c564691e90966d015080279eac1fac5ee4c73cc85975498da61833a74f0ea03020418c354aa7b96312ca53eed7e331cf658878

  • memory/832-71-0x0000000000080000-0x00000000000E6000-memory.dmp

    Filesize

    408KB

  • memory/832-73-0x0000000000080000-0x00000000000E6000-memory.dmp

    Filesize

    408KB

  • memory/832-81-0x0000000000080000-0x00000000000E6000-memory.dmp

    Filesize

    408KB

  • memory/832-77-0x00000000000F0000-0x00000000000F1000-memory.dmp

    Filesize

    4KB

  • memory/832-65-0x0000000000080000-0x00000000000E6000-memory.dmp

    Filesize

    408KB

  • memory/832-64-0x0000000000080000-0x00000000000E6000-memory.dmp

    Filesize

    408KB

  • memory/832-68-0x0000000000080000-0x00000000000E6000-memory.dmp

    Filesize

    408KB

  • memory/1152-70-0x0000000040000000-0x0000000040066000-memory.dmp

    Filesize

    408KB

  • memory/1152-67-0x000000000058A000-0x0000000000591000-memory.dmp

    Filesize

    28KB

  • memory/1972-59-0x000000000040A000-0x0000000000411000-memory.dmp

    Filesize

    28KB

  • memory/1972-54-0x0000000075BD1000-0x0000000075BD3000-memory.dmp

    Filesize

    8KB

  • memory/1972-61-0x0000000040000000-0x0000000040066000-memory.dmp

    Filesize

    408KB

  • memory/1972-60-0x0000000000020000-0x000000000002A000-memory.dmp

    Filesize

    40KB