Analysis

  • max time kernel
    150s
  • max time network
    113s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    09/08/2021, 03:48

General

  • Target
    SecuriteInfo.com.W32.AIDetect.malware1.26841.2704.exe
  • Size 222KB
  • Sample210809-14s5c5pjss
  • SHA256 4958d08fea2f261b0d2208047191e970454f48d951da411a9f665f105e298e93
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://aucmoney.com/upload/

  • http://thegymmum.com/upload/

  • http://atvcampingtrips.com/upload/

  • http://kuapakualaman.com/upload/

  • http://renatazarazua.com/upload/

  • http://nasufmutlu.com/upload/

rc4.i32
rc4.i32

Extracted

Family
  • redline

Botnet
  • SewPalpadin

C2
  • 185.215.113.114:8887

Extracted

Family
  • vidar

Version
  • 39.9

Botnet
  • 517

C2
  • https://prophefliloc.tumblr.com/

Attributes
  • profile_id

    517

Signatures

  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • RedLine Payload 2 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

  • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

  • Vidar Stealer 4 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 13 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 6 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 2 IoCs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.AIDetect.malware1.26841.2704.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.AIDetect.malware1.26841.2704.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3908
  • C:\Users\Admin\AppData\Local\Temp\9EA7.exe
    C:\Users\Admin\AppData\Local\Temp\9EA7.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1204
    • C:\Users\Admin\AppData\Local\Temp\9EA7.exe
      C:\Users\Admin\AppData\Local\Temp\9EA7.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:1016
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\44c5cab3-57f4-40fd-9de5-1add05c9cd42" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2192
      • C:\Users\Admin\AppData\Local\Temp\9EA7.exe
        "C:\Users\Admin\AppData\Local\Temp\9EA7.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2724
        • C:\Users\Admin\AppData\Local\Temp\9EA7.exe
          "C:\Users\Admin\AppData\Local\Temp\9EA7.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:3964
          • C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build2.exe
            "C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2232
            • C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build2.exe
              "C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious use of WriteProcessMemory
              PID:2072
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:4076
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:804
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:2216
          • C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build3.exe
            "C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2156
            • C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build3.exe
              "C:\Users\Admin\AppData\Local\184894a3-fdae-45e6-ae45-74874b91587a\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3088
              • C:\Windows\SysWOW64\schtasks.exe
                /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                7⤵
                • Creates scheduled task(s)
                PID:1952
  • C:\Users\Admin\AppData\Local\Temp\A5DC.exe
    C:\Users\Admin\AppData\Local\Temp\A5DC.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1336
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:588
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:4004
      • C:\Windows\SysWOW64\schtasks.exe
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        3⤵
        • Creates scheduled task(s)
        PID:1356
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:2060
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1952

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/588-192-0x0000000003370000-0x00000000034BA000-memory.dmp

        memory/1016-127-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1016-121-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1204-120-0x00000000049E0000-0x0000000004AFB000-memory.dmp

        memory/1336-136-0x0000000004C50000-0x0000000004C69000-memory.dmp

        memory/1336-132-0x0000000004780000-0x00000000047AF000-memory.dmp

        memory/1336-146-0x0000000000400000-0x0000000002C86000-memory.dmp

        memory/1336-140-0x0000000004D20000-0x0000000004D21000-memory.dmp

        memory/1336-147-0x00000000073D0000-0x00000000073D1000-memory.dmp

        memory/1336-139-0x00000000078E0000-0x00000000078E1000-memory.dmp

        memory/1336-153-0x0000000007FA0000-0x0000000007FA1000-memory.dmp

        memory/1336-141-0x00000000072A0000-0x00000000072A1000-memory.dmp

        memory/1336-148-0x00000000073D2000-0x00000000073D3000-memory.dmp

        memory/1336-149-0x00000000073D3000-0x00000000073D4000-memory.dmp

        memory/1336-176-0x0000000009910000-0x0000000009911000-memory.dmp

        memory/1336-151-0x00000000072F0000-0x00000000072F1000-memory.dmp

        memory/1336-152-0x00000000073D4000-0x00000000073D6000-memory.dmp

        memory/1336-133-0x0000000004BA0000-0x0000000004BBB000-memory.dmp

        memory/1336-134-0x00000000073E0000-0x00000000073E1000-memory.dmp

        memory/1336-169-0x0000000008C80000-0x0000000008C81000-memory.dmp

        memory/1336-170-0x0000000008E50000-0x0000000008E51000-memory.dmp

        memory/1336-171-0x00000000094A0000-0x00000000094A1000-memory.dmp

        memory/2060-197-0x00000000032A0000-0x00000000032A4000-memory.dmp

        memory/2072-173-0x0000000000400000-0x00000000004A1000-memory.dmp

        memory/2072-166-0x0000000000400000-0x00000000004A1000-memory.dmp

        memory/2156-164-0x0000000003250000-0x00000000032FE000-memory.dmp

        memory/2232-172-0x0000000002D90000-0x0000000002EDA000-memory.dmp

        memory/3052-116-0x0000000000790000-0x00000000007A6000-memory.dmp

        memory/3088-165-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3088-160-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3908-114-0x0000000002CC0000-0x0000000002CC9000-memory.dmp

        memory/3908-115-0x0000000000400000-0x0000000002C6D000-memory.dmp

        memory/3964-150-0x0000000000400000-0x0000000000537000-memory.dmp