Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-07-2024 11:57

General

  • Target

    1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe

  • Size

    240KB

  • MD5

    9ad0e9c3ba18150e9bb1176cd3cc5cfb

  • SHA1

    ca69a444c9bdb2b80411cd9ba8a3be06a87053c2

  • SHA256

    69b22d283fd4a6ce1c9f69f610449b016fdbb7ac1f8c23e199b3c72d7f75c61d

  • SHA512

    78af683bfb37d139a1cb3e3050b1a7075443197fec209d376aafdaa0694590de1a9103dd82725649dd4b35d7485e5b7a92f74d59a531ebe06fef513e15f3650b

  • SSDEEP

    1536:YzlKjIgWITA+dAGkDEQqrj0OzgFx3wyU0SyvmQm3ZH459VSypXoDzjD7GCq2iW7z:OlKjIbAUFzU0Scm13259VSypXAv/GCH

Malware Config

Extracted

Family

systembc

C2

31.44.185.6:4001

31.44.185.11:4001

Signatures

  • SystemBC

    SystemBC is a proxy and remote administration tool first seen in 2019.

  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe
    "C:\Users\Admin\AppData\Local\Temp\1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4584
    • C:\Users\Admin\AppData\Local\Temp\CaEsb.exe
      C:\Users\Admin\AppData\Local\Temp\CaEsb.exe
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4516
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\72b660fc.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2196
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 492
      2⤵
      • Program crash
      PID:1724
  • C:\ProgramData\kandcrh\beavn.exe
    C:\ProgramData\kandcrh\beavn.exe start
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3760
    • C:\Windows\TEMP\CaEsb.exe
      C:\Windows\TEMP\CaEsb.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      • Suspicious use of WriteProcessMemory
      PID:4512
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Windows\TEMP\378a5943.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        PID:4888
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4584 -ip 4584
    1⤵
      PID:1484

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\kandcrh\beavn.exe

      Filesize

      240KB

      MD5

      9ad0e9c3ba18150e9bb1176cd3cc5cfb

      SHA1

      ca69a444c9bdb2b80411cd9ba8a3be06a87053c2

      SHA256

      69b22d283fd4a6ce1c9f69f610449b016fdbb7ac1f8c23e199b3c72d7f75c61d

      SHA512

      78af683bfb37d139a1cb3e3050b1a7075443197fec209d376aafdaa0694590de1a9103dd82725649dd4b35d7485e5b7a92f74d59a531ebe06fef513e15f3650b

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\MDMHN06X\k2[1].rar

      Filesize

      4B

      MD5

      d3b07384d113edec49eaa6238ad5ff00

      SHA1

      f1d2d2f924e986ac86fdf7b36c94bcdf32beec15

      SHA256

      b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c

      SHA512

      0cf9180a764aba863a67b6d72f0918bc131c6772642cb2dce5a34f0a702f9470ddc2bf125c12198b1995c233c34b4afd346c54a2334c350a948a51b6e8b4e6b6

    • C:\Users\Admin\AppData\Local\Temp\48554294.exe

      Filesize

      4B

      MD5

      20879c987e2f9a916e578386d499f629

      SHA1

      c7b33ddcc42361fdb847036fc07e880b81935d5d

      SHA256

      9f2981a7cc4d40a2a409dc895de64253acd819d7c0011c8e80b86fe899464e31

      SHA512

      bcdde1625364dd6dd143b45bdcec8d59cf8982aff33790d390b839f3869e0e815684568b14b555a596d616252aeeaa98dac2e6e551c9095ea11a575ff25ff84f

    • C:\Users\Admin\AppData\Local\Temp\72b660fc.bat

      Filesize

      185B

      MD5

      82b8afde9b404b242ec7d096c46184df

      SHA1

      b8c1b3d00dd6038cfb07cbf2917545a988aa50ad

      SHA256

      c64e13ea88ca65d59a9493ef75459f4420abc4da07218139717d83703a695ee9

      SHA512

      b089742a4c670d7744284220ad46be69654f41ae9300882755f5be23cca540fdd6a9393e75a02598a881b584c47663355c0cb3822d39c9d6dd9638e19dedbf58

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

      Filesize

      15KB

      MD5

      f7d21de5c4e81341eccd280c11ddcc9a

      SHA1

      d4e9ef10d7685d491583c6fa93ae5d9105d815bd

      SHA256

      4485df22c627fa0bb899d79aa6ff29bc5be1dbc3caa2b7a490809338d54b7794

      SHA512

      e4553b86b083996038bacfb979ad0b86f578f95185d8efac34a77f6cc73e491d4f70e1449bbc9eb1d62f430800c1574101b270e1cb0eeed43a83049a79b636a3

    • C:\Windows\TEMP\378a5943.bat

      Filesize

      131B

      MD5

      78f1c8381f370dc7462fc1ad87b97bc6

      SHA1

      dd787a4547403d2bc7f2c303aa10950256cd205e

      SHA256

      8315054f3f12561f53a6a224e97281e63aea324fbfce236124429492f45ea19e

      SHA512

      b067e017e79ae81c448a21f910be0a8da406c2713d57a728f5ef5b498c13aa2e8cdf97d1ead8555cc6ae787e315708c98c44d1049c72c0a851010d29ddb709f2

    • memory/3760-59-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/3760-72-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/4512-62-0x0000000000A20000-0x0000000000A29000-memory.dmp

      Filesize

      36KB

    • memory/4512-67-0x0000000000A20000-0x0000000000A29000-memory.dmp

      Filesize

      36KB

    • memory/4516-46-0x0000000000C90000-0x0000000000C99000-memory.dmp

      Filesize

      36KB

    • memory/4516-5-0x0000000000C90000-0x0000000000C99000-memory.dmp

      Filesize

      36KB

    • memory/4584-51-0x0000000000400000-0x000000000040B000-memory.dmp

      Filesize

      44KB

    • memory/4584-50-0x00000000005E0000-0x00000000005E9000-memory.dmp

      Filesize

      36KB

    • memory/4584-49-0x0000000000620000-0x0000000000720000-memory.dmp

      Filesize

      1024KB

    • memory/4584-52-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/4584-0-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/4584-70-0x0000000000620000-0x0000000000720000-memory.dmp

      Filesize

      1024KB