Analysis

  • max time kernel
    150s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20230712-en
  • resource tags

    arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
  • submitted
    13/07/2023, 04:39

General

  • Target

    tmp.exe

  • Size

    695KB

  • MD5

    d4cd7f24da8930bfc263c6fcd063c4cc

  • SHA1

    6f08c420fcae55a3eb281f03b6bc63ad2eb025b8

  • SHA256

    92016b01f6a319dece11785543f6ec734a436ba63727a8ae065890dfd4b6420d

  • SHA512

    500d2cdbdcec195eeb455c3e34c9780dd3c0bf105730a78a890066d733b8646ffdccf8b302a48557b11a2547eda46261ef90dc46e499233115aa5a9e7b5891d0

  • SSDEEP

    6144:mQ606xBwuSRDF2FXbmXzMT4teeBWHYpePla37v/OFKTMvC+vax5ZEorjy7+eQMAh:J1/2FX6XzMT47kPgLHOFPJX7D4Xn

Malware Config

Extracted

Family

smokeloader

Version

2022

C2

http://cletonmy.com/

http://alpatrik.com/

rc4.i32
rc4.i32

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

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

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of WriteProcessMemory 5 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\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2596
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
      2⤵
      • Checks QEMU agent file
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:2096

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\nsj8538.tmp\System.dll

          Filesize

          11KB

          MD5

          8b3830b9dbf87f84ddd3b26645fed3a0

          SHA1

          223bef1f19e644a610a0877d01eadc9e28299509

          SHA256

          f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

          SHA512

          d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

        • \Users\Admin\AppData\Local\Temp\nsj8538.tmp\System.dll

          Filesize

          11KB

          MD5

          8b3830b9dbf87f84ddd3b26645fed3a0

          SHA1

          223bef1f19e644a610a0877d01eadc9e28299509

          SHA256

          f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

          SHA512

          d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

        • \Users\Admin\AppData\Local\Temp\nsj8538.tmp\System.dll

          Filesize

          11KB

          MD5

          8b3830b9dbf87f84ddd3b26645fed3a0

          SHA1

          223bef1f19e644a610a0877d01eadc9e28299509

          SHA256

          f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

          SHA512

          d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

        • memory/1256-74-0x00000000021B0000-0x00000000021C6000-memory.dmp

          Filesize

          88KB

        • memory/2096-72-0x0000000001470000-0x00000000037C3000-memory.dmp

          Filesize

          35.3MB

        • memory/2096-67-0x0000000000400000-0x0000000001462000-memory.dmp

          Filesize

          16.4MB

        • memory/2096-69-0x0000000001470000-0x00000000037C3000-memory.dmp

          Filesize

          35.3MB

        • memory/2096-70-0x0000000000400000-0x0000000001462000-memory.dmp

          Filesize

          16.4MB

        • memory/2096-71-0x0000000000400000-0x0000000001462000-memory.dmp

          Filesize

          16.4MB

        • memory/2096-73-0x0000000001470000-0x00000000037C3000-memory.dmp

          Filesize

          35.3MB

        • memory/2096-75-0x0000000001470000-0x00000000037C3000-memory.dmp

          Filesize

          35.3MB

        • memory/2096-78-0x0000000000400000-0x0000000001462000-memory.dmp

          Filesize

          16.4MB

        • memory/2596-68-0x0000000002870000-0x0000000004BC3000-memory.dmp

          Filesize

          35.3MB

        • memory/2596-66-0x0000000002870000-0x0000000004BC3000-memory.dmp

          Filesize

          35.3MB