Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-06-2024 16:48

General

  • Target

    SolararB5.1.exe

  • Size

    25.0MB

  • MD5

    dcff6f093bdaf3d7df4845f39834ea27

  • SHA1

    d304cbd44a432a8e7b756f4bc4da770cd4abba8a

  • SHA256

    199199951d5ec31ad1f699ee996d96524e5022a8af45797777d16488224424d5

  • SHA512

    842471ed4edcf6b1a9c5e6c4c06209a1ab8058619b5122b5b95c2917322f23f59004a275cce313dc1b44a831b42d2f77613cb79fb3ebaf94551e3d94b39a80cf

  • SSDEEP

    768:QY3reZFKghFchQVTqWnwz/1h3XE/blczxXSsvXxrjEtCdnl2pi1Rz4Rk3usGdpo3:Te/K6bTq8itNE2VhjEwzGi1dDKDogS

Malware Config

Signatures

  • Modifies Windows Firewall 2 TTPs 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 6 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops autorun.inf file 1 TTPs 4 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 9 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SolararB5.1.exe
    "C:\Users\Admin\AppData\Local\Temp\SolararB5.1.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:4904
    • C:\Windows\server.exe
      "C:\Windows\server.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Drops autorun.inf file
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2852
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:2816
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall delete allowedprogram "C:\Windows\server.exe"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:4684
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:1512
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4280,i,6522675234395427298,2952738987384583032,262144 --variations-seed-version --mojo-platform-channel-handle=4360 /prefetch:8
    1⤵
      PID:3656

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\app

      Filesize

      5B

      MD5

      d43c5b07c128b116b7bc8faf7b8efa9d

      SHA1

      dd3540ad4ae14b21b665d108cf4570c2dfa6a6fa

      SHA256

      80ad1cc7b3a784dad618a445af0c8cf3efa903f82a814756f2aaa7b57f45791f

      SHA512

      618b01e2b808e1954d011635dfdf63bc75855145208fc5cae33ce09c7e5b43cf978f6511beb311765e6920e728a290c9f9ced7563e40e8ff8d093d50fdc18334

    • C:\Windows\server.exe

      Filesize

      25.0MB

      MD5

      dcff6f093bdaf3d7df4845f39834ea27

      SHA1

      d304cbd44a432a8e7b756f4bc4da770cd4abba8a

      SHA256

      199199951d5ec31ad1f699ee996d96524e5022a8af45797777d16488224424d5

      SHA512

      842471ed4edcf6b1a9c5e6c4c06209a1ab8058619b5122b5b95c2917322f23f59004a275cce313dc1b44a831b42d2f77613cb79fb3ebaf94551e3d94b39a80cf

    • memory/2852-14-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB

    • memory/2852-16-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB

    • memory/2852-15-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB

    • memory/2852-55-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB

    • memory/2852-54-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB

    • memory/2852-56-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB

    • memory/4904-0-0x00000000750B2000-0x00000000750B3000-memory.dmp

      Filesize

      4KB

    • memory/4904-1-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB

    • memory/4904-2-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB

    • memory/4904-13-0x00000000750B0000-0x0000000075661000-memory.dmp

      Filesize

      5.7MB