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Analysis

  • max time kernel
    150s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/04/2023, 23:18

General

  • Target

    8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3.exe

  • Size

    350KB

  • MD5

    b148500e29c734f5e2bb8b6acabbc69c

  • SHA1

    d6de03a5eac546f17a10112fc1040be174eee24e

  • SHA256

    8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3

  • SHA512

    1163b6627bc769c64f45d0bb9bf3e9e42f94098283ef0763fbbf306e50ab733cb1453c1e2d3634c613f161f45072c394fe9405c12145dc6016729909aae48eac

  • SSDEEP

    6144:WuN18W8VENBSwEnm4PBxctsuxvE1E76HPWzhgTXgxi:WusWg8SwEnm4ZxcFvqHeKDd

Malware Config

Extracted

Family

smokeloader

Botnet

pu10

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.

  • 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 2 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\8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3.exe
    "C:\Users\Admin\AppData\Local\Temp\8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1512
    • C:\Users\Admin\AppData\Local\Temp\8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3.exe
      "C:\Users\Admin\AppData\Local\Temp\8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1976
  • C:\Users\Admin\AppData\Roaming\fvjwvrc
    C:\Users\Admin\AppData\Roaming\fvjwvrc
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4872
    • C:\Users\Admin\AppData\Roaming\fvjwvrc
      C:\Users\Admin\AppData\Roaming\fvjwvrc
      2⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:4080

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    350KB

    MD5

    b148500e29c734f5e2bb8b6acabbc69c

    SHA1

    d6de03a5eac546f17a10112fc1040be174eee24e

    SHA256

    8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3

    SHA512

    1163b6627bc769c64f45d0bb9bf3e9e42f94098283ef0763fbbf306e50ab733cb1453c1e2d3634c613f161f45072c394fe9405c12145dc6016729909aae48eac

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

    Filesize

    350KB

    MD5

    b148500e29c734f5e2bb8b6acabbc69c

    SHA1

    d6de03a5eac546f17a10112fc1040be174eee24e

    SHA256

    8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3

    SHA512

    1163b6627bc769c64f45d0bb9bf3e9e42f94098283ef0763fbbf306e50ab733cb1453c1e2d3634c613f161f45072c394fe9405c12145dc6016729909aae48eac

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

    Filesize

    350KB

    MD5

    b148500e29c734f5e2bb8b6acabbc69c

    SHA1

    d6de03a5eac546f17a10112fc1040be174eee24e

    SHA256

    8a9a945c25f37431a6ee971ea9bb4b71dcc000a73d7b41f50973bf20bb198ab3

    SHA512

    1163b6627bc769c64f45d0bb9bf3e9e42f94098283ef0763fbbf306e50ab733cb1453c1e2d3634c613f161f45072c394fe9405c12145dc6016729909aae48eac

  • memory/1512-135-0x0000000000980000-0x0000000000989000-memory.dmp

    Filesize

    36KB

  • memory/1976-134-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/1976-136-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/1976-138-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/3196-137-0x0000000002C60000-0x0000000002C76000-memory.dmp

    Filesize

    88KB

  • memory/3196-150-0x0000000002D50000-0x0000000002D66000-memory.dmp

    Filesize

    88KB

  • memory/4080-149-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/4080-151-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB