Analysis

  • max time kernel
    300s
  • max time network
    256s
  • platform
    windows10-1703_x64
  • resource
    win10-20230915-en
  • resource tags

    arch:x64arch:x86image:win10-20230915-enlocale:en-usos:windows10-1703-x64system
  • submitted
    16/09/2023, 04:48

General

  • Target

    a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe

  • Size

    272KB

  • MD5

    5ee48fa6fdc554fbacbbc9b66da4f2aa

  • SHA1

    006f3580e833bc5e965ddc5cf4593396c96031dc

  • SHA256

    a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50

  • SHA512

    21f184ab5a541611f7342c6823addcd37a28aef72956b87874e3ee1631b9212fe5afac9f2b8d744b6d04170c8381a79d5c0500a31a454f08cdd1469f904e07fe

  • SSDEEP

    3072:AQvRg2YvVcjtvEKny84ccbqvPZg7UCmiMiG6Cb/V0KNMGNDn:dvwvVcjt8KnyXbqvPZg7gIJ8VBL

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

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Checks SCSI registry key(s) 3 TTPs 6 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 AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 12 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\a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe
    "C:\Users\Admin\AppData\Local\Temp\a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:784
    • C:\Users\Admin\AppData\Local\Temp\a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe
      "C:\Users\Admin\AppData\Local\Temp\a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:4124
  • C:\Users\Admin\AppData\Roaming\ctwvahc
    C:\Users\Admin\AppData\Roaming\ctwvahc
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4480
    • C:\Users\Admin\AppData\Roaming\ctwvahc
      C:\Users\Admin\AppData\Roaming\ctwvahc
      2⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:1268

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          272KB

          MD5

          5ee48fa6fdc554fbacbbc9b66da4f2aa

          SHA1

          006f3580e833bc5e965ddc5cf4593396c96031dc

          SHA256

          a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50

          SHA512

          21f184ab5a541611f7342c6823addcd37a28aef72956b87874e3ee1631b9212fe5afac9f2b8d744b6d04170c8381a79d5c0500a31a454f08cdd1469f904e07fe

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

          Filesize

          272KB

          MD5

          5ee48fa6fdc554fbacbbc9b66da4f2aa

          SHA1

          006f3580e833bc5e965ddc5cf4593396c96031dc

          SHA256

          a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50

          SHA512

          21f184ab5a541611f7342c6823addcd37a28aef72956b87874e3ee1631b9212fe5afac9f2b8d744b6d04170c8381a79d5c0500a31a454f08cdd1469f904e07fe

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

          Filesize

          272KB

          MD5

          5ee48fa6fdc554fbacbbc9b66da4f2aa

          SHA1

          006f3580e833bc5e965ddc5cf4593396c96031dc

          SHA256

          a3f12a86956b46caf03b7ab7a7802dc4e6f63d62f2983c9e5fa4b12983525b50

          SHA512

          21f184ab5a541611f7342c6823addcd37a28aef72956b87874e3ee1631b9212fe5afac9f2b8d744b6d04170c8381a79d5c0500a31a454f08cdd1469f904e07fe

        • memory/784-1-0x0000000000720000-0x0000000000820000-memory.dmp

          Filesize

          1024KB

        • memory/784-2-0x0000000002310000-0x0000000002319000-memory.dmp

          Filesize

          36KB

        • memory/1268-20-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/2832-5-0x0000000000F20000-0x0000000000F36000-memory.dmp

          Filesize

          88KB

        • memory/2832-19-0x00000000010C0000-0x00000000010D6000-memory.dmp

          Filesize

          88KB

        • memory/4124-3-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/4124-4-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/4124-6-0x0000000000400000-0x0000000000409000-memory.dmp

          Filesize

          36KB

        • memory/4480-16-0x0000000000730000-0x0000000000830000-memory.dmp

          Filesize

          1024KB