Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    25/01/2024, 00:59

General

  • Target

    73504cf8fa65991b2bccb9bf37199334.exe

  • Size

    250KB

  • MD5

    73504cf8fa65991b2bccb9bf37199334

  • SHA1

    b052a3250a3c67c52ece74fd81fe624e446b4718

  • SHA256

    eff3ee03b15bb4038d6a2a3acbfb91b064519f08f35fa36cdd83a641d6c43abb

  • SHA512

    bbba7ce2aed7784ee586732630a5574e499d9d1ab08cacfa35ef6794e5465e323cc3e76c8cca2596787dc69b032417285cf9328a70abb937290e3e0c90d5da14

  • SSDEEP

    3072:7PrjeSS7vYtClV9TgiMPpA5vUnMoKRl7/L1jEftWgeBHj8dZPOwNVXjzoZ8V:nj/SrYQ0P4RrLKVv3ZrNVfs8V

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

Extracted

Family

smokeloader

Version

2020

C2

http://conceitosseg.com/upload/

http://integrasidata.com/upload/

http://ozentekstil.com/upload/

http://finbelportal.com/upload/

http://telanganadigital.com/upload/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 6 IoCs
  • Program crash 1 IoCs
  • 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: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\73504cf8fa65991b2bccb9bf37199334.exe
    "C:\Users\Admin\AppData\Local\Temp\73504cf8fa65991b2bccb9bf37199334.exe"
    1⤵
    • Loads dropped DLL
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:2168
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {DC916690-660D-4B49-8B96-93626287B269} S-1-5-21-3818056530-936619650-3554021955-1000:SFVRQGEO\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1912
    • C:\Users\Admin\AppData\Roaming\rjvtatc
      C:\Users\Admin\AppData\Roaming\rjvtatc
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1508
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1508 -s 124
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:2808

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          250KB

          MD5

          73504cf8fa65991b2bccb9bf37199334

          SHA1

          b052a3250a3c67c52ece74fd81fe624e446b4718

          SHA256

          eff3ee03b15bb4038d6a2a3acbfb91b064519f08f35fa36cdd83a641d6c43abb

          SHA512

          bbba7ce2aed7784ee586732630a5574e499d9d1ab08cacfa35ef6794e5465e323cc3e76c8cca2596787dc69b032417285cf9328a70abb937290e3e0c90d5da14

        • \Users\Admin\AppData\Local\Temp\CC4F.tmp

          Filesize

          1.2MB

          MD5

          d124f55b9393c976963407dff51ffa79

          SHA1

          2c7bbedd79791bfb866898c85b504186db610b5d

          SHA256

          ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef

          SHA512

          278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06

        • memory/1072-7-0x0000000002E30000-0x0000000002E45000-memory.dmp

          Filesize

          84KB

        • memory/1508-18-0x0000000000250000-0x0000000000350000-memory.dmp

          Filesize

          1024KB

        • memory/1508-19-0x0000000000400000-0x0000000002C75000-memory.dmp

          Filesize

          40.5MB

        • memory/1508-27-0x0000000000250000-0x0000000000350000-memory.dmp

          Filesize

          1024KB

        • memory/2168-4-0x0000000002DC0000-0x0000000002EC0000-memory.dmp

          Filesize

          1024KB

        • memory/2168-5-0x0000000000220000-0x0000000000229000-memory.dmp

          Filesize

          36KB

        • memory/2168-6-0x0000000000400000-0x0000000002C75000-memory.dmp

          Filesize

          40.5MB

        • memory/2168-8-0x0000000000400000-0x0000000002C75000-memory.dmp

          Filesize

          40.5MB