Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/01/2024, 20:30

General

  • Target
    a8905ed9ed1f5b9d74cee3da53ebc0a21af8cbcbf86504ac52f4234cc54c60e1.exe
  • Size 240KB
  • Sample240104-y99fesaghk
  • SHA256 a8905ed9ed1f5b9d74cee3da53ebc0a21af8cbcbf86504ac52f4234cc54c60e1
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • smokeloader

Botnet
  • pub1

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://host-file-host6.com/

  • http://host-host-file8.com/

rc4.i32
rc4.i32

Signatures

  • BetaBot

    Beta Bot is a Trojan that infects computers and disables Antivirus.

  • Modifies firewall policy service 2 TTPs 4 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Sets file execution options in registry 2 TTPs 4 IoCs
  • Checks BIOS information in registry 2 TTPs 1 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • NSIS installer 8 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 4 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies Internet Explorer Protected Mode 1 TTPs 4 IoCs
  • Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 32 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\a8905ed9ed1f5b9d74cee3da53ebc0a21af8cbcbf86504ac52f4234cc54c60e1.exe
    "C:\Users\Admin\AppData\Local\Temp\a8905ed9ed1f5b9d74cee3da53ebc0a21af8cbcbf86504ac52f4234cc54c60e1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1124
    • C:\Users\Admin\AppData\Local\Temp\a8905ed9ed1f5b9d74cee3da53ebc0a21af8cbcbf86504ac52f4234cc54c60e1.exe
      "C:\Users\Admin\AppData\Local\Temp\a8905ed9ed1f5b9d74cee3da53ebc0a21af8cbcbf86504ac52f4234cc54c60e1.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1904
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1904 -s 328
        3⤵
        • Program crash
        PID:848
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1904 -ip 1904
    1⤵
      PID:1772
    • C:\Users\Admin\AppData\Local\Temp\B93E.exe
      C:\Users\Admin\AppData\Local\Temp\B93E.exe
      1⤵
      • Sets file execution options in registry
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Checks processor information in registry
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3912
      • C:\Windows\SysWOW64\explorer.exe
        C:\Windows\SysWOW64\explorer.exe
        2⤵
        • Modifies firewall policy service
        • Sets file execution options in registry
        • Checks BIOS information in registry
        • Adds Run key to start application
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Checks processor information in registry
        • Enumerates system info in registry
        • Modifies Internet Explorer Protected Mode
        • Modifies Internet Explorer Protected Mode Banner
        • Modifies Internet Explorer settings
        • Suspicious use of AdjustPrivilegeToken
        PID:1000
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1000 -s 1084
          3⤵
          • Program crash
          PID:3264
    • C:\Users\Admin\AppData\Local\Temp\C303.exe
      C:\Users\Admin\AppData\Local\Temp\C303.exe
      1⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:996
      • C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe
        "C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:1344
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1000 -ip 1000
      1⤵
        PID:1772

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            B93E.exe

            • Path C:\Users\Admin\AppData\Local\Temp\B93E.exe
            • Size 360KB
            • SHA256 6d99cec56614b6b8a23dfa84a50c6bbfde535411c6366ac2bcc20c9f5af62880
            • MD5 SHA1 SHA512 SSDEEP

            C303.exe

            • Path C:\Users\Admin\AppData\Local\Temp\C303.exe
            • Size 368KB
            • SHA256 008190a8a0b304392c48d79a93a0147d459b782b9f0ce007f59bb3c351bcffd6
            • MD5 SHA1 SHA512 SSDEEP

            C303.exe

            • Path C:\Users\Admin\AppData\Local\Temp\C303.exe
            • Size 605KB
            • SHA256 1b537292d621578e5b56c3512214e6f259afb6e476896a770f627397907cfd6f
            • MD5 SHA1 SHA512 SSDEEP

            WindowsUpdater.exe

            • Path C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe
            • Size 373KB
            • SHA256 62bbe98511c96f9d43882b9c6eb348a712ffdea491cb90f2a82b4afe44e96c08
            • MD5 SHA1 SHA512 SSDEEP

            WindowsUpdater.exe

            • Path C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe
            • Size 371KB
            • SHA256 dc16a79a720e8f4e3abb49f6ec0d59d6d692cbb292593462add874cdf9dc7989
            • MD5 SHA1 SHA512 SSDEEP

            WindowsUpdater.exe

            • Path C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe
            • Size 126KB
            • SHA256 130f7d23d36522b007be63274523d558f5f10c2c7e819a6c095e365854a0a186
            • MD5 SHA1 SHA512 SSDEEP

            lib.dll

            • Path C:\Users\Admin\AppData\Local\Temp\lib.dll
            • Size 192KB
            • SHA256 a56e8fa03a7d211e8911a1812fcd457334d8d038fa81b0609609a55716444477
            • MD5 SHA1 SHA512 SSDEEP

            System.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsuC499.tmp\System.dll
            • Size 12KB
            • SHA256 7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1
            • MD5 SHA1 SHA512 SSDEEP

            memory/996-48-0x0000000000030000-0x00000000005C6000-memory.dmp

            memory/996-41-0x0000000000030000-0x00000000005C6000-memory.dmp

            memory/1000-26-0x0000000000380000-0x00000000007B4000-memory.dmp

            memory/1000-60-0x0000000002F50000-0x0000000002F52000-memory.dmp

            memory/1000-63-0x00000000010F0000-0x00000000011B4000-memory.dmp

            memory/1000-62-0x0000000000380000-0x00000000007B3000-memory.dmp

            memory/1000-28-0x0000000000380000-0x00000000007B4000-memory.dmp

            memory/1000-30-0x00000000010F0000-0x00000000011B4000-memory.dmp

            memory/1000-32-0x00000000010F0000-0x00000000011B4000-memory.dmp

            memory/1000-35-0x0000000001530000-0x0000000001531000-memory.dmp

            memory/1124-2-0x00000000025A0000-0x00000000025A9000-memory.dmp

            memory/1124-1-0x00000000009C0000-0x0000000000AC0000-memory.dmp

            memory/1904-8-0x0000000000400000-0x0000000000409000-memory.dmp

            memory/1904-4-0x0000000000400000-0x0000000000409000-memory.dmp

            memory/1904-3-0x0000000000400000-0x0000000000409000-memory.dmp

            memory/3412-5-0x0000000002EB0000-0x0000000002EC6000-memory.dmp

            memory/3912-16-0x0000000000010000-0x000000000006D000-memory.dmp

            memory/3912-18-0x0000000000720000-0x0000000000786000-memory.dmp

            memory/3912-23-0x0000000000A10000-0x0000000000A11000-memory.dmp

            memory/3912-25-0x0000000000720000-0x0000000000786000-memory.dmp

            memory/3912-24-0x0000000002830000-0x000000000283C000-memory.dmp

            memory/3912-34-0x0000000000720000-0x0000000000786000-memory.dmp

            memory/3912-19-0x0000000000790000-0x000000000079D000-memory.dmp

            memory/3912-20-0x0000000000720000-0x0000000000786000-memory.dmp

            memory/3912-22-0x0000000077CD4000-0x0000000077CD5000-memory.dmp