Analysis

  • max time kernel
    187s
  • max time network
    201s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/10/2022, 08:46

General

  • Target
    235920237c07cb8decfa53e9c92d72e6.exe
  • Size 133KB
  • Sample221003-kn98yahbdm
  • SHA256 d898c6a965e975401a73dc7068488e0248bc10a0794cb2600fa12bc6d63007d8
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Smokeloader packer 2 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • GoLang User-Agent 5 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 19 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\235920237c07cb8decfa53e9c92d72e6.exe
    "C:\Users\Admin\AppData\Local\Temp\235920237c07cb8decfa53e9c92d72e6.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:4772
  • C:\Users\Admin\AppData\Local\Temp\15EF.exe
    C:\Users\Admin\AppData\Local\Temp\15EF.exe
    1⤵
    • Executes dropped EXE
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4740
    • C:\Windows\Temp\1.exe
      "C:\Windows\Temp\1.exe"
      2⤵
      • Executes dropped EXE
      PID:3092
  • C:\Users\Admin\AppData\Local\Temp\3B99.exe
    C:\Users\Admin\AppData\Local\Temp\3B99.exe
    1⤵
    • Executes dropped EXE
    PID:4272
  • C:\Users\Admin\AppData\Local\Temp\59F0.exe
    C:\Users\Admin\AppData\Local\Temp\59F0.exe
    1⤵
    • Executes dropped EXE
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1064
    • C:\Windows\SysWOW64\cmd.exe
      cmd /C "wmic cpu get name"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2064
      • C:\Windows\SysWOW64\Wbem\WMIC.exe
        wmic cpu get name
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2448
  • C:\Windows\SysWOW64\explorer.exe
    C:\Windows\SysWOW64\explorer.exe
    1⤵
      PID:3948
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe
      1⤵
        PID:4656
      • C:\Windows\SysWOW64\explorer.exe
        C:\Windows\SysWOW64\explorer.exe
        1⤵
          PID:1732
        • C:\Windows\explorer.exe
          C:\Windows\explorer.exe
          1⤵
            PID:4540
          • C:\Windows\SysWOW64\explorer.exe
            C:\Windows\SysWOW64\explorer.exe
            1⤵
              PID:900
            • C:\Windows\SysWOW64\explorer.exe
              C:\Windows\SysWOW64\explorer.exe
              1⤵
                PID:4544
              • C:\Windows\SysWOW64\explorer.exe
                C:\Windows\SysWOW64\explorer.exe
                1⤵
                  PID:4012
                • C:\Windows\explorer.exe
                  C:\Windows\explorer.exe
                  1⤵
                    PID:4668
                  • C:\Windows\SysWOW64\explorer.exe
                    C:\Windows\SysWOW64\explorer.exe
                    1⤵
                      PID:3280

                    Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          15EF.exe

                          • Path C:\Users\Admin\AppData\Local\Temp\15EF.exe
                          • Size 466KB
                          • SHA256 3238f627cf753b195a814ad7a01bd16fa13616802e39f48a981c5c8703a2ff6f
                          • MD5 SHA1 SHA512 SSDEEP

                          15EF.exe

                          • Path C:\Users\Admin\AppData\Local\Temp\15EF.exe
                          • Size 466KB
                          • SHA256 3238f627cf753b195a814ad7a01bd16fa13616802e39f48a981c5c8703a2ff6f
                          • MD5 SHA1 SHA512 SSDEEP

                          3B99.exe

                          • Path C:\Users\Admin\AppData\Local\Temp\3B99.exe
                          • Size 315KB
                          • SHA256 6398a682b929077fa895ca80e77f5ada30103387b76cb0021712e33ab8122dde
                          • MD5 SHA1 SHA512 SSDEEP

                          3B99.exe

                          • Path C:\Users\Admin\AppData\Local\Temp\3B99.exe
                          • Size 315KB
                          • SHA256 6398a682b929077fa895ca80e77f5ada30103387b76cb0021712e33ab8122dde
                          • MD5 SHA1 SHA512 SSDEEP

                          59F0.exe

                          • Path C:\Users\Admin\AppData\Local\Temp\59F0.exe
                          • Size 4.3MB
                          • SHA256 ed14ed57c0a785e01024deffe5a05a79ed9d61a21c58ea8be136c79d31e2daa6
                          • MD5 SHA1 SHA512 SSDEEP

                          59F0.exe

                          • Path C:\Users\Admin\AppData\Local\Temp\59F0.exe
                          • Size 4.3MB
                          • SHA256 ed14ed57c0a785e01024deffe5a05a79ed9d61a21c58ea8be136c79d31e2daa6
                          • MD5 SHA1 SHA512 SSDEEP

                          1.exe

                          • Path C:\Windows\Temp\1.exe
                          • Size 369KB
                          • SHA256 61059bd8f3bdb2b07ca01c87efe6284b8b3b77ca63e9a063e0e9010774a482a4
                          • MD5 SHA1 SHA512 SSDEEP

                          1.exe

                          • Path C:\Windows\Temp\1.exe
                          • Size 369KB
                          • SHA256 61059bd8f3bdb2b07ca01c87efe6284b8b3b77ca63e9a063e0e9010774a482a4
                          • MD5 SHA1 SHA512 SSDEEP

                          memory/900-165-0x0000000000D60000-0x0000000000D87000-memory.dmp

                          memory/900-161-0x0000000000D90000-0x0000000000DB2000-memory.dmp

                          memory/1732-156-0x0000000000B30000-0x0000000000B39000-memory.dmp

                          memory/1732-155-0x0000000000B40000-0x0000000000B45000-memory.dmp

                          memory/3280-176-0x0000000000CD0000-0x0000000000CDB000-memory.dmp

                          memory/3280-175-0x0000000000CE0000-0x0000000000CE8000-memory.dmp

                          memory/3948-151-0x0000000000D10000-0x0000000000D1B000-memory.dmp

                          memory/3948-150-0x0000000000D20000-0x0000000000D27000-memory.dmp

                          memory/3948-177-0x0000000000D20000-0x0000000000D27000-memory.dmp

                          memory/4012-169-0x0000000001030000-0x0000000001036000-memory.dmp

                          memory/4012-170-0x0000000001020000-0x000000000102B000-memory.dmp

                          memory/4540-159-0x0000000000DC0000-0x0000000000DCC000-memory.dmp

                          memory/4540-158-0x0000000000DD0000-0x0000000000DD6000-memory.dmp

                          memory/4544-166-0x0000000001240000-0x0000000001245000-memory.dmp

                          memory/4544-167-0x0000000001230000-0x0000000001239000-memory.dmp

                          memory/4656-178-0x0000000000DB0000-0x0000000000DB9000-memory.dmp

                          memory/4656-152-0x0000000000DB0000-0x0000000000DB9000-memory.dmp

                          memory/4656-153-0x0000000000DA0000-0x0000000000DAF000-memory.dmp

                          memory/4668-172-0x00000000008D0000-0x00000000008D7000-memory.dmp

                          memory/4668-173-0x00000000008C0000-0x00000000008CD000-memory.dmp

                          memory/4772-133-0x0000000000630000-0x0000000000639000-memory.dmp

                          memory/4772-134-0x0000000000400000-0x000000000057F000-memory.dmp

                          memory/4772-135-0x0000000000400000-0x000000000057F000-memory.dmp

                          memory/4772-132-0x000000000065D000-0x000000000066E000-memory.dmp