Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/01/2023, 00:46

General

  • Target
    file.exe
  • Size 342KB
  • Sample230104-a4mgpsdd77
  • SHA256 efa35da26e2c21149a9be5e3787d39911ab7e08f435f95099f468b586ebc71d4
  • MD5 SHA1 SHA512 SSDEEP

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 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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 2 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 24 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 20 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:4900
  • C:\Users\Admin\AppData\Local\Temp\D2F5.exe
    C:\Users\Admin\AppData\Local\Temp\D2F5.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:3128
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp",Yqiowyrat
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:3064
      • C:\Windows\system32\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 30937
        3⤵
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        PID:5084
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3128 -s 560
      2⤵
      • Program crash
      PID:4652
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3128 -ip 3128
    1⤵
      PID:3676
    • C:\Users\Admin\AppData\Local\Temp\283A.exe
      C:\Users\Admin\AppData\Local\Temp\283A.exe
      1⤵
      • Executes dropped EXE
      PID:4368
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4368 -s 1276
        2⤵
        • Program crash
        PID:1128
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4368 -ip 4368
      1⤵
        PID:3068
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:2336

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              283A.exe

              • Path C:\Users\Admin\AppData\Local\Temp\283A.exe
              • Size 358KB
              • SHA256 88d8e8603f80909b11a5ac4b6836a5a072e2693622dcdebdf73ad89d40a11b05
              • MD5 SHA1 SHA512 SSDEEP

              283A.exe

              • Path C:\Users\Admin\AppData\Local\Temp\283A.exe
              • Size 358KB
              • SHA256 88d8e8603f80909b11a5ac4b6836a5a072e2693622dcdebdf73ad89d40a11b05
              • MD5 SHA1 SHA512 SSDEEP

              D2F5.exe

              • Path C:\Users\Admin\AppData\Local\Temp\D2F5.exe
              • Size 1.1MB
              • SHA256 8e1a4437a2db138c75a38757cb563a10267d5f2c84da68eceda99fefbd74d6c5
              • MD5 SHA1 SHA512 SSDEEP

              D2F5.exe

              • Path C:\Users\Admin\AppData\Local\Temp\D2F5.exe
              • Size 1.1MB
              • SHA256 8e1a4437a2db138c75a38757cb563a10267d5f2c84da68eceda99fefbd74d6c5
              • MD5 SHA1 SHA512 SSDEEP

              Oatedoqeryee.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp
              • Size 718KB
              • SHA256 200911b8faaea3104d1b51231d534e615fe755dc84024c1029aeafe1f842206b
              • MD5 SHA1 SHA512 SSDEEP

              Oatedoqeryee.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Oatedoqeryee.tmp
              • Size 718KB
              • SHA256 200911b8faaea3104d1b51231d534e615fe755dc84024c1029aeafe1f842206b
              • MD5 SHA1 SHA512 SSDEEP

              memory/3064-157-0x0000000004F20000-0x0000000005060000-memory.dmp

              memory/3064-162-0x0000000004F99000-0x0000000004F9B000-memory.dmp

              memory/3064-152-0x0000000004F20000-0x0000000005060000-memory.dmp

              memory/3064-166-0x00000000066C0000-0x00000000071E0000-memory.dmp

              memory/3064-153-0x0000000004F20000-0x0000000005060000-memory.dmp

              memory/3064-156-0x0000000004F20000-0x0000000005060000-memory.dmp

              memory/3064-148-0x0000000004F20000-0x0000000005060000-memory.dmp

              memory/3064-145-0x00000000066C0000-0x00000000071E0000-memory.dmp

              memory/3064-146-0x00000000066C0000-0x00000000071E0000-memory.dmp

              memory/3064-147-0x0000000004F20000-0x0000000005060000-memory.dmp

              memory/3128-144-0x0000000000400000-0x0000000002D01000-memory.dmp

              memory/3128-143-0x0000000004B10000-0x0000000004C1C000-memory.dmp

              memory/3128-142-0x0000000004990000-0x0000000004A5F000-memory.dmp

              memory/4368-154-0x0000000002DBD000-0x0000000002DD7000-memory.dmp

              memory/4368-155-0x0000000002D70000-0x0000000002D99000-memory.dmp

              memory/4368-165-0x0000000000400000-0x0000000002C4C000-memory.dmp

              memory/4368-161-0x0000000000400000-0x0000000002C4C000-memory.dmp

              memory/4900-134-0x0000000000400000-0x0000000002C48000-memory.dmp

              memory/4900-132-0x0000000002D9D000-0x0000000002DB3000-memory.dmp

              memory/4900-135-0x0000000000400000-0x0000000002C48000-memory.dmp

              memory/4900-133-0x0000000002CC0000-0x0000000002CC9000-memory.dmp

              memory/5084-160-0x000001084AF00000-0x000001084B040000-memory.dmp

              memory/5084-163-0x0000010849490000-0x000001084973E000-memory.dmp

              memory/5084-164-0x0000000000200000-0x000000000049D000-memory.dmp

              memory/5084-159-0x000001084AF00000-0x000001084B040000-memory.dmp