Analysis

  • max time kernel
    151s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/03/2024, 03:28

General

  • Target

    b11b550fccddee0f9652cb34c12f91c0.exe

  • Size

    180KB

  • MD5

    b11b550fccddee0f9652cb34c12f91c0

  • SHA1

    0dd1703f8971981781f07b931547a07ea2d3a420

  • SHA256

    fd58afa96d56df9d4bb20955601fc4b7e379b9964eccf31cb1904252f709dbc7

  • SHA512

    612e823b664f77b50e751ff1e2a4964fd110685583ff51af3e1875fc74a228a47539e0ddbc584c3558c88eab2bc32807e8cd533878bcbc2519b1554e6abe9496

  • SSDEEP

    3072:nLKj98VzeJcm/ujPBN4SpORcoWJfPsV98Q5NGSfPH+:nLPUdOJzloWdPsViQGSHe

Malware Config

Extracted

Family

smokeloader

Botnet

0708

Extracted

Family

smokeloader

Version

2020

C2

http://readinglistforjuly1.xyz/

http://readinglistforjuly2.xyz/

http://readinglistforjuly3.xyz/

http://readinglistforjuly4.xyz/

http://readinglistforjuly5.xyz/

http://readinglistforjuly6.xyz/

http://readinglistforjuly7.xyz/

http://readinglistforjuly8.xyz/

http://readinglistforjuly9.xyz/

http://readinglistforjuly10.xyz/

http://readinglistforjuly1.site/

http://readinglistforjuly2.site/

http://readinglistforjuly3.site/

http://readinglistforjuly4.site/

http://readinglistforjuly5.site/

http://readinglistforjuly6.site/

http://readinglistforjuly7.site/

http://readinglistforjuly8.site/

http://readinglistforjuly9.site/

http://readinglistforjuly10.site/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Deletes itself 1 IoCs
  • 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: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of UnmapMainImage 1 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\b11b550fccddee0f9652cb34c12f91c0.exe
    "C:\Users\Admin\AppData\Local\Temp\b11b550fccddee0f9652cb34c12f91c0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2724
    • C:\Users\Admin\AppData\Local\Temp\b11b550fccddee0f9652cb34c12f91c0.exe
      "C:\Users\Admin\AppData\Local\Temp\b11b550fccddee0f9652cb34c12f91c0.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:1352
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4028 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2980
    • C:\Users\Admin\AppData\Roaming\uwafgwr
      C:\Users\Admin\AppData\Roaming\uwafgwr
      1⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:4060
      • C:\Users\Admin\AppData\Roaming\uwafgwr
        C:\Users\Admin\AppData\Roaming\uwafgwr
        2⤵
        • Executes dropped EXE
        • Checks SCSI registry key(s)
        • Suspicious behavior: MapViewOfSection
        PID:4468

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            180KB

            MD5

            b11b550fccddee0f9652cb34c12f91c0

            SHA1

            0dd1703f8971981781f07b931547a07ea2d3a420

            SHA256

            fd58afa96d56df9d4bb20955601fc4b7e379b9964eccf31cb1904252f709dbc7

            SHA512

            612e823b664f77b50e751ff1e2a4964fd110685583ff51af3e1875fc74a228a47539e0ddbc584c3558c88eab2bc32807e8cd533878bcbc2519b1554e6abe9496

          • memory/1352-3-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/1352-4-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/1352-6-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB

          • memory/2724-1-0x0000000002E20000-0x0000000002F20000-memory.dmp

            Filesize

            1024KB

          • memory/2724-2-0x0000000004A00000-0x0000000004A0A000-memory.dmp

            Filesize

            40KB

          • memory/3356-5-0x00000000030D0000-0x00000000030E6000-memory.dmp

            Filesize

            88KB

          • memory/3356-19-0x0000000002FD0000-0x0000000002FE6000-memory.dmp

            Filesize

            88KB

          • memory/4060-16-0x0000000002FF0000-0x00000000030F0000-memory.dmp

            Filesize

            1024KB

          • memory/4468-20-0x0000000000400000-0x0000000000409000-memory.dmp

            Filesize

            36KB