Analysis

  • max time kernel
    146s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 04:12

General

  • Target
    9a2e880c5c4fcbecf71014de4bbeb2db.exe
  • Size 146KB
  • Sample240329-eshrlahe2y
  • SHA256 d5d49fbe4f955416afe5db8c735638cedde326347757e8c57323305480568418
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Renames multiple (562) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in System32 directory 4 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Control Panel 2 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a2e880c5c4fcbecf71014de4bbeb2db.exe
    "C:\Users\Admin\AppData\Local\Temp\9a2e880c5c4fcbecf71014de4bbeb2db.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4292
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:1924
    • C:\ProgramData\5C69.tmp
      "C:\ProgramData\5C69.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:3172
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\5C69.tmp >> NUL
        3⤵
          PID:2204
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
      1⤵
        PID:4284
      • C:\Windows\system32\printfilterpipelinesvc.exe
        C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
        1⤵
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:2856
        • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
          /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{456FE2B5-E6C0-49E6-9FFE-68CC026F8F9D}.xps" 133561591354780000
          2⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of SetWindowsHookEx
          PID:3116

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            BBBBBBBBBBB

            • Path C:\$Recycle.Bin\S-1-5-21-275798769-4264537674-1142822080-1000\BBBBBBBBBBB
            • Size 129B
            • SHA256 6b010b8e53204cf7f4e14e3fa294ee9a740a3c307d249fe586e53b130575eddc
            • MD5 SHA1 SHA512

            ETx6kDWq1.README.txt

            • Path C:\ETx6kDWq1.README.txt
            • Size 449B
            • SHA256 fcd9314182e1d6ce85e724ed58f2add5993982f52459af9b0198095be137e0af
            • MD5 SHA1 SHA512

            5C69.tmp

            • Path C:\ProgramData\5C69.tmp
            • Size 14KB
            • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
            • MD5 SHA1 SHA512 SSDEEP

            DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

            • Path C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
            • Size 146KB
            • SHA256 e25792f079768ae708e6b26a1710843b8643bdccb7c3a6c9069b87ef6e2326d5
            • MD5 SHA1 SHA512 SSDEEP

            {EF2321A2-264B-43B9-925E-D20B9F1DE7FB}

            • Path C:\Users\Admin\AppData\Local\Temp\{EF2321A2-264B-43B9-925E-D20B9F1DE7FB}
            • Size 4KB
            • SHA256 c1fc8d4daa90ed345ce0230dffd052432e38f18ff2f35ffc7f471abd952c140a
            • MD5 SHA1 SHA512 SSDEEP

            DDDDDDDDDDD

            • Path F:\$RECYCLE.BIN\S-1-5-21-275798769-4264537674-1142822080-1000\DDDDDDDDDDD
            • Size 129B
            • SHA256 76132451f3832fdcde0c517c53e40b4cfcef30643fbfc32e39e24da58c15f604
            • MD5 SHA1 SHA512

            memory/3116-2785-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2783-0x00007FF9789C0000-0x00007FF9789D0000-memory.dmp

            memory/3116-2742-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2743-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2745-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2744-0x00007FF97AB50000-0x00007FF97AB60000-memory.dmp

            memory/3116-2746-0x00007FF97AB50000-0x00007FF97AB60000-memory.dmp

            memory/3116-2747-0x00007FF97AB50000-0x00007FF97AB60000-memory.dmp

            memory/3116-2748-0x00007FF97AB50000-0x00007FF97AB60000-memory.dmp

            memory/3116-2749-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2816-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2750-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2815-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2794-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2793-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2741-0x00007FF97AB50000-0x00007FF97AB60000-memory.dmp

            memory/3116-2792-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2791-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2786-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2788-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2787-0x00007FF9789C0000-0x00007FF9789D0000-memory.dmp

            memory/3116-2790-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3116-2789-0x00007FF9BAAD0000-0x00007FF9BACC5000-memory.dmp

            memory/3172-2784-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

            memory/3172-2782-0x000000007FE20000-0x000000007FE21000-memory.dmp

            memory/3172-2781-0x0000000002570000-0x0000000002580000-memory.dmp

            memory/3172-2779-0x000000007FE40000-0x000000007FE41000-memory.dmp

            memory/3172-2780-0x0000000002570000-0x0000000002580000-memory.dmp

            memory/4292-0-0x0000000002E80000-0x0000000002E90000-memory.dmp

            memory/4292-1-0x0000000002E80000-0x0000000002E90000-memory.dmp

            memory/4292-2-0x0000000002E80000-0x0000000002E90000-memory.dmp