Analysis

  • max time kernel
    150s
  • max time network
    195s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    09/08/2021, 11:35

General

  • Target
    5742959b35dcc6b59fb95d5a659f62f5.exe
  • Size 222KB
  • Sample210809-cndcjraf12
  • SHA256 96ab0a5a858b541c6e6fc44588405d29f8ba18bf8e8ff4af25b235135bbfd01a
  • 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 9 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 12 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 4 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 1 IoCs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5742959b35dcc6b59fb95d5a659f62f5.exe
    "C:\Users\Admin\AppData\Local\Temp\5742959b35dcc6b59fb95d5a659f62f5.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:468
  • C:\Users\Admin\AppData\Local\Temp\3A71.exe
    C:\Users\Admin\AppData\Local\Temp\3A71.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:556
    • C:\Users\Admin\AppData\Local\Temp\3A71.exe
      C:\Users\Admin\AppData\Local\Temp\3A71.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:784
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\063bc026-c584-4249-af67-2e9ecf48cdd3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1564
      • C:\Users\Admin\AppData\Local\Temp\3A71.exe
        "C:\Users\Admin\AppData\Local\Temp\3A71.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:864
        • C:\Users\Admin\AppData\Local\Temp\3A71.exe
          "C:\Users\Admin\AppData\Local\Temp\3A71.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious use of WriteProcessMemory
          PID:1728
          • C:\Users\Admin\AppData\Local\4ce6a9af-1d68-4382-b0ee-3ebd73049cf9\build2.exe
            "C:\Users\Admin\AppData\Local\4ce6a9af-1d68-4382-b0ee-3ebd73049cf9\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:528
            • C:\Users\Admin\AppData\Local\4ce6a9af-1d68-4382-b0ee-3ebd73049cf9\build2.exe
              "C:\Users\Admin\AppData\Local\4ce6a9af-1d68-4382-b0ee-3ebd73049cf9\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              PID:1856
          • C:\Users\Admin\AppData\Local\4ce6a9af-1d68-4382-b0ee-3ebd73049cf9\build3.exe
            "C:\Users\Admin\AppData\Local\4ce6a9af-1d68-4382-b0ee-3ebd73049cf9\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1668
            • C:\Users\Admin\AppData\Local\4ce6a9af-1d68-4382-b0ee-3ebd73049cf9\build3.exe
              "C:\Users\Admin\AppData\Local\4ce6a9af-1d68-4382-b0ee-3ebd73049cf9\build3.exe"
              6⤵
              • Executes dropped EXE
              PID:1336
              • 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:596
  • C:\Users\Admin\AppData\Local\Temp\473E.exe
    C:\Users\Admin\AppData\Local\Temp\473E.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1748

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/468-60-0x0000000075051000-0x0000000075053000-memory.dmp

        memory/468-62-0x0000000000400000-0x0000000002C6D000-memory.dmp

        memory/468-61-0x0000000000220000-0x0000000000229000-memory.dmp

        memory/528-111-0x0000000000350000-0x00000000003EE000-memory.dmp

        memory/556-72-0x0000000004600000-0x000000000471B000-memory.dmp

        memory/784-73-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/784-68-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1200-63-0x0000000002AF0000-0x0000000002B06000-memory.dmp

        memory/1336-124-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/1336-118-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/1668-123-0x0000000000220000-0x0000000000224000-memory.dmp

        memory/1728-95-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1748-81-0x0000000004E92000-0x0000000004E93000-memory.dmp

        memory/1748-76-0x0000000000230000-0x000000000025F000-memory.dmp

        memory/1748-77-0x0000000004A10000-0x0000000004A2B000-memory.dmp

        memory/1748-78-0x0000000004A50000-0x0000000004A69000-memory.dmp

        memory/1748-79-0x0000000000400000-0x0000000002C86000-memory.dmp

        memory/1748-80-0x0000000004E91000-0x0000000004E92000-memory.dmp

        memory/1748-82-0x0000000004E93000-0x0000000004E94000-memory.dmp

        memory/1748-83-0x0000000004E94000-0x0000000004E96000-memory.dmp

        memory/1856-112-0x0000000000400000-0x00000000004A1000-memory.dmp

        memory/1856-107-0x0000000000400000-0x00000000004A1000-memory.dmp