Analysis

  • max time kernel
    150s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    30-12-2023 12:06

General

  • Target

    17ff421e11cc1bf3b6f1274e43b7435c.exe

  • Size

    318KB

  • MD5

    17ff421e11cc1bf3b6f1274e43b7435c

  • SHA1

    6cfa5688fe8ca2f5cbb095255d95d48a625a42b6

  • SHA256

    195a8f7542c4f37fa6de3c76c9a832c33207ce5a814e526adc1d0b9bba9ed5f1

  • SHA512

    137b49ba9be1a51d245f41d1b6267e6c5e254ce849563ed8b6992873830a1c342cdceea0857170cd90c1adfaa5387ee5ac61339efa00e3b270ed875136a8d008

  • SSDEEP

    6144:v10PyuSVFHbQ7tpo7UGoYm7QjhDD5qH3JB81AIeTpdtx:WFSVJmtpoMYUiBKVV3

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 3 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 FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 8 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\17ff421e11cc1bf3b6f1274e43b7435c.exe
    "C:\Users\Admin\AppData\Local\Temp\17ff421e11cc1bf3b6f1274e43b7435c.exe"
    1⤵
    • Loads dropped DLL
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:2428
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {F70E3180-AD25-4153-A27E-055109614C4F} S-1-5-21-452311807-3713411997-1028535425-1000:OZEMQECW\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2764
    • C:\Users\Admin\AppData\Roaming\svdtjbs
      C:\Users\Admin\AppData\Roaming\svdtjbs
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:684
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 684 -s 124
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:1652

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    318KB

    MD5

    17ff421e11cc1bf3b6f1274e43b7435c

    SHA1

    6cfa5688fe8ca2f5cbb095255d95d48a625a42b6

    SHA256

    195a8f7542c4f37fa6de3c76c9a832c33207ce5a814e526adc1d0b9bba9ed5f1

    SHA512

    137b49ba9be1a51d245f41d1b6267e6c5e254ce849563ed8b6992873830a1c342cdceea0857170cd90c1adfaa5387ee5ac61339efa00e3b270ed875136a8d008

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

    Filesize

    1.2MB

    MD5

    d124f55b9393c976963407dff51ffa79

    SHA1

    2c7bbedd79791bfb866898c85b504186db610b5d

    SHA256

    ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef

    SHA512

    278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06

  • memory/684-19-0x0000000000600000-0x0000000000700000-memory.dmp

    Filesize

    1024KB

  • memory/684-20-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

  • memory/1272-7-0x00000000029B0000-0x00000000029C5000-memory.dmp

    Filesize

    84KB

  • memory/2428-1-0x00000000005E0000-0x00000000006E0000-memory.dmp

    Filesize

    1024KB

  • memory/2428-2-0x0000000000220000-0x0000000000229000-memory.dmp

    Filesize

    36KB

  • memory/2428-3-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

  • memory/2428-8-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

  • memory/2428-11-0x0000000000220000-0x0000000000229000-memory.dmp

    Filesize

    36KB