Analysis

  • max time kernel
    150s
  • max time network
    94s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    17-11-2024 17:23

General

  • Target

    tmpfile-main/Exterm.exe

  • Size

    830KB

  • MD5

    4b1fba57411e2fb9756f44a84bd74b43

  • SHA1

    06305226e1d4e4fcca12d83d72dc8a4fe9f4d9ed

  • SHA256

    4001b4e8a309eb8949f827d0b3ef572c79c1b21d96aa4c35436b0930bea8eec1

  • SHA512

    ce491f3fcea8d270351825f0ac8e48994866d728db121b954c0fa2d16d7999d0f898c99b969f75521c5c827bc5437221e707f78e3fb68e70c8a6abd91775f113

  • SSDEEP

    24576:75bRMyb2OEpAoC0HJ0EWRVW4ICikaZo8M:NbRMyb5YP0ny4xiNZoB

Malware Config

Extracted

Family

bdaejec

C2

ddos.dnsnb8.net

Signatures

  • Bdaejec

    Bdaejec is a backdoor written in C++.

  • Bdaejec family
  • Detects Bdaejec Backdoor. 1 IoCs

    Bdaejec is backdoor written in C++.

  • Stops running service(s) 4 TTPs
  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Executes dropped EXE 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Launches sc.exe 4 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpfile-main\Exterm.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpfile-main\Exterm.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1920
    • C:\Users\Admin\AppData\Local\Temp\MontanaInject.exe
      "C:\Users\Admin\AppData\Local\Temp\MontanaInject.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5064
      • C:\Users\Admin\AppData\Local\Temp\OUsJaT.exe
        C:\Users\Admin\AppData\Local\Temp\OUsJaT.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2304
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7a580052.bat" "
          4⤵
          • System Location Discovery: System Language Discovery
          PID:544
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c sc stop FairplayKD >nul
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4464
        • C:\Windows\SysWOW64\sc.exe
          sc stop FairplayKD
          4⤵
          • Launches sc.exe
          • System Location Discovery: System Language Discovery
          PID:2896
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c sc delete FairplayKD >nul
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1092
        • C:\Windows\SysWOW64\sc.exe
          sc delete FairplayKD
          4⤵
          • Launches sc.exe
          • System Location Discovery: System Language Discovery
          PID:4108
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c sc stop FairplayKD1 >nul
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4800
        • C:\Windows\SysWOW64\sc.exe
          sc stop FairplayKD1
          4⤵
          • Launches sc.exe
          • System Location Discovery: System Language Discovery
          PID:4664
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c sc delete FairplayKD1 >nul
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2908
        • C:\Windows\SysWOW64\sc.exe
          sc delete FairplayKD1
          4⤵
          • Launches sc.exe
          • System Location Discovery: System Language Discovery
          PID:2936

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\QQKXRHN9\k2[1].rar

    Filesize

    4B

    MD5

    d3b07384d113edec49eaa6238ad5ff00

    SHA1

    f1d2d2f924e986ac86fdf7b36c94bcdf32beec15

    SHA256

    b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c

    SHA512

    0cf9180a764aba863a67b6d72f0918bc131c6772642cb2dce5a34f0a702f9470ddc2bf125c12198b1995c233c34b4afd346c54a2334c350a948a51b6e8b4e6b6

  • C:\Users\Admin\AppData\Local\Temp\019204FE.exe

    Filesize

    4B

    MD5

    20879c987e2f9a916e578386d499f629

    SHA1

    c7b33ddcc42361fdb847036fc07e880b81935d5d

    SHA256

    9f2981a7cc4d40a2a409dc895de64253acd819d7c0011c8e80b86fe899464e31

    SHA512

    bcdde1625364dd6dd143b45bdcec8d59cf8982aff33790d390b839f3869e0e815684568b14b555a596d616252aeeaa98dac2e6e551c9095ea11a575ff25ff84f

  • C:\Users\Admin\AppData\Local\Temp\7a580052.bat

    Filesize

    187B

    MD5

    0ee1d93aef912b7eac3f64ba44410716

    SHA1

    9edca799ffe75ce1831f467b787772e96d9c294c

    SHA256

    e8af15e17d9b77da8f3037fc87eebc1266248ac721895e91da39f9a67b4f910d

    SHA512

    0f0e72bc3c283d6d4c8e85d94c1fd86467ccb938ea79c6a79909b6ace2999878a41b3b92fb5ed9419ee327c2da9bd06c58f9cdddbe44804857e9f7b1e2e035f5

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

    Filesize

    79KB

    MD5

    16d4eec72ee69f6acae5a362488dcac7

    SHA1

    014d4b32236bc6dc648aeddf6819e1e0e62718d8

    SHA256

    d2d80e8ba8030df48bd0c485ec83b5bdf3c500cb84cdaca664e9fb6b1b4b6c9f

    SHA512

    1f320a07d98ce30f693429869830341e789c6ca2dc95d6fc148f5ddb141793cc877ad8cab9459af2caac1919a1ae245c12ce0f1ee2bed0f01c06eddb734cc61c

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

    Filesize

    15KB

    MD5

    56b2c3810dba2e939a8bb9fa36d3cf96

    SHA1

    99ee31cd4b0d6a4b62779da36e0eeecdd80589fc

    SHA256

    4354970ccc7cd6bb16318f132c34f6a1b3d5c2ea7ff53e1c9271905527f2db07

    SHA512

    27812a9a034d7bd2ca73b337ae9e0b6dc79c38cfd1a2c6ac9d125d3cc8fa563c401a40d22155811d5054e5baa8cf8c8e7e03925f25fa856a9ba9dea708d15b4e

  • memory/1920-9-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

    Filesize

    10.8MB

  • memory/1920-14-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

    Filesize

    10.8MB

  • memory/1920-0-0x00007FFE1C583000-0x00007FFE1C585000-memory.dmp

    Filesize

    8KB

  • memory/1920-1-0x00000000004D0000-0x00000000005A6000-memory.dmp

    Filesize

    856KB

  • memory/2304-19-0x0000000000710000-0x0000000000719000-memory.dmp

    Filesize

    36KB

  • memory/2304-36-0x0000000000710000-0x0000000000719000-memory.dmp

    Filesize

    36KB

  • memory/5064-13-0x00000000005D0000-0x00000000005E9000-memory.dmp

    Filesize

    100KB

  • memory/5064-35-0x00000000005D0000-0x00000000005E9000-memory.dmp

    Filesize

    100KB