Analysis

  • max time kernel
    90s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    08-07-2022 02:47

General

  • Target

    425b9cd4f233bf9c68bf2f965717e36348911ea057d3792ebc862caea077bf27.exe

  • Size

    210KB

  • MD5

    4a664f5bfd63570f209fa6cf42467eaf

  • SHA1

    bd61a99af933bde5d4c341520e30b62034139c7c

  • SHA256

    425b9cd4f233bf9c68bf2f965717e36348911ea057d3792ebc862caea077bf27

  • SHA512

    62c17b99f91ede151fbd328ff7203efdc4cee1f11207f029b85065bacc426c9c585a4f7fd3fb970d1ff679367852cedff8fe2f7641873bf9ed43d9144a95b232

Malware Config

Extracted

Family

smokeloader

Version

2018

C2

http://proxy-exe.bit/2/

http://kiyanka.club/2/

http://d3s1.me/2/

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.

  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\425b9cd4f233bf9c68bf2f965717e36348911ea057d3792ebc862caea077bf27.exe
    "C:\Users\Admin\AppData\Local\Temp\425b9cd4f233bf9c68bf2f965717e36348911ea057d3792ebc862caea077bf27.exe"
    1⤵
    • Maps connected drives based on registry
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4732
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:4140

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Discovery

    Query Registry

    1
    T1012

    Peripheral Device Discovery

    1
    T1120

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/796-133-0x0000000000C00000-0x0000000000C15000-memory.dmp
      Filesize

      84KB

    • memory/4140-130-0x0000000000000000-mapping.dmp
    • memory/4732-131-0x0000000000500000-0x0000000000509000-memory.dmp
      Filesize

      36KB

    • memory/4732-132-0x0000000000400000-0x000000000043B000-memory.dmp
      Filesize

      236KB