Analysis

  • max time kernel
    73s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    07/10/2021, 12:08

General

  • Target
    245cceafa613c14d48cd7465b27ba993.exe
  • Size 75KB
  • Sample211007-pay1zacehj
  • SHA256 059afad6c9d4183c5b32b89465732dc6ea7bf7192c0ed7e9f1dabfe65a17da2e
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • RedLine

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

  • RedLine Payload 2 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Executes dropped EXE 6 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • 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.

  • Themida packer 4 IoCs

    Detects Themida, an advanced Windows software protection system.

  • 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.

  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\245cceafa613c14d48cd7465b27ba993.exe
    "C:\Users\Admin\AppData\Local\Temp\245cceafa613c14d48cd7465b27ba993.exe"
    1⤵
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1532
    • C:\Users\Admin\AppData\Roaming\6919286.scr
      "C:\Users\Admin\AppData\Roaming\6919286.scr" /S
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1604
    • C:\Users\Admin\AppData\Roaming\3324788.scr
      "C:\Users\Admin\AppData\Roaming\3324788.scr" /S
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1636
      • C:\Users\Admin\AppData\Roaming\WinHost\WinHoster.exe
        "C:\Users\Admin\AppData\Roaming\WinHost\WinHoster.exe"
        3⤵
        • Executes dropped EXE
        PID:812
    • C:\Users\Admin\AppData\Roaming\7258749.scr
      "C:\Users\Admin\AppData\Roaming\7258749.scr" /S
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1816
    • C:\Users\Admin\AppData\Roaming\4282645.scr
      "C:\Users\Admin\AppData\Roaming\4282645.scr" /S
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1808
    • C:\Users\Admin\AppData\Roaming\3558588.scr
      "C:\Users\Admin\AppData\Roaming\3558588.scr" /S
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1424

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/812-104-0x00000000041C0000-0x00000000041C1000-memory.dmp

        memory/812-84-0x0000000000BB0000-0x0000000000BB1000-memory.dmp

        memory/1424-101-0x0000000000430000-0x0000000000475000-memory.dmp

        memory/1424-95-0x0000000000940000-0x0000000000941000-memory.dmp

        memory/1424-98-0x0000000000300000-0x0000000000301000-memory.dmp

        memory/1424-102-0x0000000000320000-0x0000000000321000-memory.dmp

        memory/1424-105-0x0000000004A20000-0x0000000004A21000-memory.dmp

        memory/1532-54-0x0000000000C50000-0x0000000000C51000-memory.dmp

        memory/1532-57-0x000000001A920000-0x000000001A922000-memory.dmp

        memory/1532-56-0x0000000000340000-0x0000000000341000-memory.dmp

        memory/1604-77-0x0000000004AE0000-0x0000000004AE1000-memory.dmp

        memory/1604-73-0x0000000000520000-0x0000000000569000-memory.dmp

        memory/1604-64-0x00000000013B0000-0x00000000013B1000-memory.dmp

        memory/1604-68-0x00000000003D0000-0x00000000003D1000-memory.dmp

        memory/1604-74-0x00000000003F0000-0x00000000003F1000-memory.dmp

        memory/1636-66-0x0000000000820000-0x0000000000821000-memory.dmp

        memory/1636-70-0x00000000004C0000-0x00000000004CC000-memory.dmp

        memory/1636-75-0x00000000004D0000-0x00000000004D1000-memory.dmp

        memory/1636-69-0x0000000000280000-0x0000000000281000-memory.dmp

        memory/1808-99-0x0000000000150000-0x0000000000151000-memory.dmp

        memory/1808-103-0x0000000002BB0000-0x0000000002BB1000-memory.dmp

        memory/1816-97-0x0000000000C40000-0x0000000000C41000-memory.dmp

        memory/1816-76-0x00000000751D1000-0x00000000751D3000-memory.dmp

        memory/1816-85-0x00000000003E0000-0x00000000003E1000-memory.dmp