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Analysis

  • max time kernel
    150s
  • max time network
    111s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    13/01/2023, 11:49

General

  • Target

    c242969d68b39199fa21ec075493f62f0cc69384f4847759f904031cf217a603.exe

  • Size

    285KB

  • MD5

    0a713b9646c73a9e82d26b0a4638ff4a

  • SHA1

    557746482cad4605d6a36ef9e0838a1351f1870b

  • SHA256

    c242969d68b39199fa21ec075493f62f0cc69384f4847759f904031cf217a603

  • SHA512

    930dcd4f3349767f87b5b9b8c82ca71afd04a1bd85058129ee3442f80c92d9e7b5949c1c72ac91903184fb32b800ab4b775177a2a75f93bfc97c17036e5f2894

  • SSDEEP

    6144:Bdtj9HlyLmGBlJyWwyuxMi2gHH+8SlJZ9tzrSA3Hq+v:/tj9U6GBqWNxuehZ9P3H

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 23 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 36 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 18 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c242969d68b39199fa21ec075493f62f0cc69384f4847759f904031cf217a603.exe
    "C:\Users\Admin\AppData\Local\Temp\c242969d68b39199fa21ec075493f62f0cc69384f4847759f904031cf217a603.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:2752
  • C:\Users\Admin\AppData\Local\Temp\3B05.exe
    C:\Users\Admin\AppData\Local\Temp\3B05.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4008
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp",Uuhpdwiyer
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:4672
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 17232
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:4212
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4220

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\3B05.exe

      Filesize

      1.1MB

      MD5

      5b828b1cccb4f07c6f01e21ce6883ea7

      SHA1

      81aa640a004098929a3d5943f96a055ad72088da

      SHA256

      942dab456e87812b72af98bb1d85b2b06cde2b97b0edab91761e02e5a8dc1b59

      SHA512

      e4a27f62ac7e34e11b012b65d6b608604ffd908c0fcabb268945d45e7eb335a306dc7f02b801159943ca0c17669bde5ab3297f307f04bcf334493ba09a0f5721

    • C:\Users\Admin\AppData\Local\Temp\3B05.exe

      Filesize

      1.1MB

      MD5

      5b828b1cccb4f07c6f01e21ce6883ea7

      SHA1

      81aa640a004098929a3d5943f96a055ad72088da

      SHA256

      942dab456e87812b72af98bb1d85b2b06cde2b97b0edab91761e02e5a8dc1b59

      SHA512

      e4a27f62ac7e34e11b012b65d6b608604ffd908c0fcabb268945d45e7eb335a306dc7f02b801159943ca0c17669bde5ab3297f307f04bcf334493ba09a0f5721

    • C:\Users\Admin\AppData\Local\Temp\Rruwtqrefy.tmp

      Filesize

      805KB

      MD5

      44d724c9ad9ae3149d4997852eea3e96

      SHA1

      dcd92e1b704b3f25ba455e079004c5a5aaf903f9

      SHA256

      c5cd7d52ba95127c18556a2ddca64e4ef80a2945e6579545c0067abdab3a0ad0

      SHA512

      791c3b62685a475799a991b2f0f9535781c888d48d1dd47b5b2cd407ff46e15231247f07ceb63c012bd923bf88fffaecf29030186e3d569b9886048881012e44

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

      Filesize

      805KB

      MD5

      44d724c9ad9ae3149d4997852eea3e96

      SHA1

      dcd92e1b704b3f25ba455e079004c5a5aaf903f9

      SHA256

      c5cd7d52ba95127c18556a2ddca64e4ef80a2945e6579545c0067abdab3a0ad0

      SHA512

      791c3b62685a475799a991b2f0f9535781c888d48d1dd47b5b2cd407ff46e15231247f07ceb63c012bd923bf88fffaecf29030186e3d569b9886048881012e44

    • memory/2752-158-0x000000000073D000-0x0000000000753000-memory.dmp

      Filesize

      88KB

    • memory/2752-121-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-122-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-123-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-124-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-125-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-126-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-127-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-128-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-129-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-130-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-131-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-132-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-133-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-134-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-135-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-136-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-137-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-138-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-139-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-141-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-140-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-142-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-143-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-144-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-145-0x000000000073D000-0x0000000000753000-memory.dmp

      Filesize

      88KB

    • memory/2752-146-0x00000000005B0000-0x00000000005B9000-memory.dmp

      Filesize

      36KB

    • memory/2752-147-0x0000000000400000-0x000000000044D000-memory.dmp

      Filesize

      308KB

    • memory/2752-148-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-149-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-150-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-151-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-152-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-153-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-154-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-155-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-156-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-157-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-120-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/2752-159-0x0000000000400000-0x000000000044D000-memory.dmp

      Filesize

      308KB

    • memory/4008-162-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-184-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-164-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-165-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-166-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-167-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-168-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-171-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-170-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-172-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-173-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-174-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-175-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-176-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-178-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-177-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-179-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-180-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-181-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-182-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-163-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-183-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-185-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-186-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-188-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-189-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-190-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-191-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-192-0x0000000077710000-0x000000007789E000-memory.dmp

      Filesize

      1.6MB

    • memory/4008-206-0x0000000002250000-0x000000000233E000-memory.dmp

      Filesize

      952KB

    • memory/4008-207-0x0000000002380000-0x00000000024A4000-memory.dmp

      Filesize

      1.1MB

    • memory/4008-208-0x0000000000400000-0x0000000000525000-memory.dmp

      Filesize

      1.1MB

    • memory/4008-214-0x0000000000400000-0x0000000000525000-memory.dmp

      Filesize

      1.1MB

    • memory/4212-325-0x0000000000F90000-0x0000000001228000-memory.dmp

      Filesize

      2.6MB

    • memory/4212-326-0x0000020373450000-0x00000203736F9000-memory.dmp

      Filesize

      2.7MB

    • memory/4672-310-0x0000000006F20000-0x0000000007A4F000-memory.dmp

      Filesize

      11.2MB

    • memory/4672-324-0x0000000006A29000-0x0000000006A2B000-memory.dmp

      Filesize

      8KB

    • memory/4672-327-0x0000000006F20000-0x0000000007A4F000-memory.dmp

      Filesize

      11.2MB