Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-11-2022 11:11

General

  • Target

    1339d8437b13ceca77e24912f9c3fe11e30b32f71bc7da03c4f86a4c8a218453.exe

  • Size

    163KB

  • MD5

    b4d551e1ae248fd9bbf157e5c8b9a1a9

  • SHA1

    adf99319734136d0c619dcbb089fa4d4743ae239

  • SHA256

    1339d8437b13ceca77e24912f9c3fe11e30b32f71bc7da03c4f86a4c8a218453

  • SHA512

    584fca9677747ccde53d82faca59938a5f353671eca9248f711e93b29852b8aa952ae6fc055107a4a1fc2c9e95bfa1f8adb1d4b38888c2a3bc09e29e189c741e

  • SSDEEP

    3072:Eakj1CJOHiPNYH5vuncNz5X2LMTXMmg8cmoxJ/1T:ERCe4Npyz5X2LpmgvmoJ/

Malware Config

Extracted

Family

systembc

C2

89.248.163.218:443

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • SystemBC

    SystemBC is a proxy and remote administration tool first seen in 2019.

  • Blocklisted process makes network request 6 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 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.

  • Program crash 1 IoCs
  • 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 25 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 30 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 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1339d8437b13ceca77e24912f9c3fe11e30b32f71bc7da03c4f86a4c8a218453.exe
    "C:\Users\Admin\AppData\Local\Temp\1339d8437b13ceca77e24912f9c3fe11e30b32f71bc7da03c4f86a4c8a218453.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:4712
  • C:\Users\Admin\AppData\Local\Temp\1482.exe
    C:\Users\Admin\AppData\Local\Temp\1482.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:5040
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Wuwedteata.tmp",Tiuqiiueaur
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:4956
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 22529
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:2488
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5040 -s 528
      2⤵
      • Program crash
      PID:1396
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 5040 -ip 5040
    1⤵
      PID:4896
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3876
      • C:\Users\Admin\AppData\Local\Temp\B4A6.exe
        C:\Users\Admin\AppData\Local\Temp\B4A6.exe
        1⤵
        • Executes dropped EXE
        PID:3420

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\1482.exe

        Filesize

        987KB

        MD5

        0e065b926598c60fd669903b5fc764d2

        SHA1

        08c298e297a85723d3cbec548faca0571d70f1bb

        SHA256

        9a1b9df106af6f421516d8ca53b453a492258dd5006ff71ba177e12f4a247c05

        SHA512

        724f0465029346ecef9f01115996497020ed6e7905bb65387ce8db48b69d2c328ad5a389b33fae091eef991991032dfc591d890f7b13f44c17fa28b304d82f51

      • C:\Users\Admin\AppData\Local\Temp\1482.exe

        Filesize

        987KB

        MD5

        0e065b926598c60fd669903b5fc764d2

        SHA1

        08c298e297a85723d3cbec548faca0571d70f1bb

        SHA256

        9a1b9df106af6f421516d8ca53b453a492258dd5006ff71ba177e12f4a247c05

        SHA512

        724f0465029346ecef9f01115996497020ed6e7905bb65387ce8db48b69d2c328ad5a389b33fae091eef991991032dfc591d890f7b13f44c17fa28b304d82f51

      • C:\Users\Admin\AppData\Local\Temp\B4A6.exe

        Filesize

        163KB

        MD5

        07c48efec256157d37cfad4f429050f6

        SHA1

        95ee9560e06a1b7f6ca2e88c3a86987d3fcc5b1e

        SHA256

        304d2fc82e2398804364c5b2da3fe43ed9a3f5581883134f4b2ac68ec76326d3

        SHA512

        a47fc8d88e0cf03382db2e1a5d194834fa7e6add376402fbac4b5ca46bc6de06e4ff8ee1a605e209a0cc3a16d3b498bfa2fb2d2b00c8b1cd7d8a6b8d16d816ac

      • C:\Users\Admin\AppData\Local\Temp\B4A6.exe

        Filesize

        163KB

        MD5

        07c48efec256157d37cfad4f429050f6

        SHA1

        95ee9560e06a1b7f6ca2e88c3a86987d3fcc5b1e

        SHA256

        304d2fc82e2398804364c5b2da3fe43ed9a3f5581883134f4b2ac68ec76326d3

        SHA512

        a47fc8d88e0cf03382db2e1a5d194834fa7e6add376402fbac4b5ca46bc6de06e4ff8ee1a605e209a0cc3a16d3b498bfa2fb2d2b00c8b1cd7d8a6b8d16d816ac

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

        Filesize

        752KB

        MD5

        ad4fe6dd11eca5f7254e0e00ed47d984

        SHA1

        e809de0322d74dd4642f215f46f22b3a9b7caa21

        SHA256

        6ecc725eab418e27d8fa2f1031fce6bc119d677b8d72e0447050a87489e8e0ca

        SHA512

        d09f4f9a94f34fe1a6f5fe78ec32e91026fe07263183d4d41c4a51cfa7ee5fbc1b38d2ebeda20a717a2a730af011d73d113decb3ae2fe9db50530c095cf33ea3

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

        Filesize

        752KB

        MD5

        ad4fe6dd11eca5f7254e0e00ed47d984

        SHA1

        e809de0322d74dd4642f215f46f22b3a9b7caa21

        SHA256

        6ecc725eab418e27d8fa2f1031fce6bc119d677b8d72e0447050a87489e8e0ca

        SHA512

        d09f4f9a94f34fe1a6f5fe78ec32e91026fe07263183d4d41c4a51cfa7ee5fbc1b38d2ebeda20a717a2a730af011d73d113decb3ae2fe9db50530c095cf33ea3

      • memory/2488-155-0x00000281A15B0000-0x00000281A16F0000-memory.dmp

        Filesize

        1.2MB

      • memory/2488-157-0x00000000002E0000-0x0000000000577000-memory.dmp

        Filesize

        2.6MB

      • memory/2488-156-0x00000281A15B0000-0x00000281A16F0000-memory.dmp

        Filesize

        1.2MB

      • memory/2488-158-0x00000281A1710000-0x00000281A19B8000-memory.dmp

        Filesize

        2.7MB

      • memory/2488-154-0x00007FF6CE686890-mapping.dmp

      • memory/2488-160-0x00000281A1710000-0x00000281A19B8000-memory.dmp

        Filesize

        2.7MB

      • memory/3420-166-0x0000000000400000-0x000000000058E000-memory.dmp

        Filesize

        1.6MB

      • memory/3420-164-0x0000000000909000-0x000000000091A000-memory.dmp

        Filesize

        68KB

      • memory/3420-165-0x00000000006D0000-0x00000000006D9000-memory.dmp

        Filesize

        36KB

      • memory/3420-161-0x0000000000000000-mapping.dmp

      • memory/4712-133-0x00000000022C0000-0x00000000022C9000-memory.dmp

        Filesize

        36KB

      • memory/4712-136-0x0000000000400000-0x000000000058E000-memory.dmp

        Filesize

        1.6MB

      • memory/4712-135-0x0000000000648000-0x0000000000659000-memory.dmp

        Filesize

        68KB

      • memory/4712-134-0x0000000000400000-0x000000000058E000-memory.dmp

        Filesize

        1.6MB

      • memory/4712-132-0x0000000000648000-0x0000000000659000-memory.dmp

        Filesize

        68KB

      • memory/4956-140-0x0000000000000000-mapping.dmp

      • memory/4956-153-0x0000000004B00000-0x0000000004C40000-memory.dmp

        Filesize

        1.2MB

      • memory/4956-152-0x0000000004B00000-0x0000000004C40000-memory.dmp

        Filesize

        1.2MB

      • memory/4956-151-0x0000000004B00000-0x0000000004C40000-memory.dmp

        Filesize

        1.2MB

      • memory/4956-150-0x0000000004B00000-0x0000000004C40000-memory.dmp

        Filesize

        1.2MB

      • memory/4956-149-0x0000000004B00000-0x0000000004C40000-memory.dmp

        Filesize

        1.2MB

      • memory/4956-159-0x00000000065E0000-0x000000000715A000-memory.dmp

        Filesize

        11.5MB

      • memory/4956-148-0x0000000004B00000-0x0000000004C40000-memory.dmp

        Filesize

        1.2MB

      • memory/4956-147-0x00000000065E0000-0x000000000715A000-memory.dmp

        Filesize

        11.5MB

      • memory/4956-146-0x00000000065E0000-0x000000000715A000-memory.dmp

        Filesize

        11.5MB

      • memory/5040-145-0x0000000000400000-0x000000000065C000-memory.dmp

        Filesize

        2.4MB

      • memory/5040-144-0x00000000023E0000-0x0000000002501000-memory.dmp

        Filesize

        1.1MB

      • memory/5040-143-0x00000000022FA000-0x00000000023D8000-memory.dmp

        Filesize

        888KB

      • memory/5040-137-0x0000000000000000-mapping.dmp