Analysis

  • max time kernel
    91s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    08-07-2022 04:50

General

  • Target

    fs110_cr14.exe

  • Size

    334KB

  • MD5

    a6ec44d1405343f99f9c003f219070f9

  • SHA1

    4b98b7a064d84d7caece6044fe43a0b916696325

  • SHA256

    cc162b9bd661591e17f6f0e5281362a5ce48ca53d57ca6bab4aaa45300f44f30

  • SHA512

    aff3d8ba8f47e07140e22c88283182b59ffa2bb89fdbf2f52b413c98cd920835481cc55b1b4c65b382ef6908a364ecfcba6336cd008805b56e16cad89c752f3b

Malware Config

Extracted

Family

smokeloader

Version

2018

C2

http://159.89.109.130/

http://cdvfrt5.com/

http://43trfdsds.com/

http://2344t554ddfr.com/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fs110_cr14.exe
    "C:\Users\Admin\AppData\Local\Temp\fs110_cr14.exe"
    1⤵
    • Maps connected drives based on registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    PID:4884

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3036-133-0x00000000034A0000-0x00000000034B5000-memory.dmp
    Filesize

    84KB

  • memory/4884-130-0x0000000002320000-0x00000000023A0000-memory.dmp
    Filesize

    512KB

  • memory/4884-131-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/4884-132-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/4884-134-0x0000000002320000-0x00000000023A0000-memory.dmp
    Filesize

    512KB