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Analysis

  • max time kernel
    842s
  • max time network
    847s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    08/04/2024, 21:56

Errors

Reason
Machine shutdown

General

  • Target

    Flash Player.exe

  • Size

    534KB

  • MD5

    670c5e520902ccad978f4171dab178f4

  • SHA1

    09d08afadf92f6d7303ed406f7da32ddd708090a

  • SHA256

    d9f889aecab50e4037018337cbbe4cc3c3b0f3647dc3e97de909d3aaa0c47097

  • SHA512

    ec01f7aae8a909435823309748179408fe8b09288c4f8ba936a1c2b24ba8c2ee81dc5b9903c8401995855ba320daf79c9f755509560ded9cc697eb777f150931

  • SSDEEP

    12288:rdJX8v+mtT+AAAAAAAAAAAAAAAXAbAAAAAAAAAAAAAAAAAAAAAbAAAgAxAAAAAAk:rXHmtT

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (219) files with added filename extension

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

  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Deletes itself 1 IoCs
  • Drops startup file 6 IoCs
  • Executes dropped EXE 16 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops desktop.ini file(s) 34 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Flash Player.exe
    "C:\Users\Admin\AppData\Local\Temp\Flash Player.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2548
    • C:\Users\Admin\AppData\Roaming\cssrs.exe
      "C:\Users\Admin\AppData\Roaming\cssrs.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2996
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /delete /tn "NvidiaDreever" /f
        3⤵
          PID:2496
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /sc minute /mo 1 /tn "NvidiaDreever" /tr C:\Users\Admin\AppData\Roaming\cssrs.exe
          3⤵
          • Creates scheduled task(s)
          PID:2292
        • C:\Users\Admin\AppData\Local\Temp\7e75b82901b04d7b90cca18e2671dba6.exe
          "C:\Users\Admin\AppData\Local\Temp\7e75b82901b04d7b90cca18e2671dba6.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1136
          • C:\Users\Admin\AppData\Roaming\XXX555.exe
            "C:\Users\Admin\AppData\Roaming\XXX555.exe"
            4⤵
            • Drops startup file
            • Executes dropped EXE
            • Drops desktop.ini file(s)
            • Sets desktop wallpaper using registry
            • Suspicious behavior: AddClipboardFormatListener
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2736
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:2424
              • C:\Windows\system32\vssadmin.exe
                vssadmin delete shadows /all /quiet
                6⤵
                • Interacts with shadow copies
                PID:2040
              • C:\Windows\System32\Wbem\WMIC.exe
                wmic shadowcopy delete
                6⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:2668
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:896
              • C:\Windows\system32\bcdedit.exe
                bcdedit /set {default} bootstatuspolicy ignoreallfailures
                6⤵
                • Modifies boot configuration data using bcdedit
                PID:2840
              • C:\Windows\system32\bcdedit.exe
                bcdedit /set {default} recoveryenabled no
                6⤵
                • Modifies boot configuration data using bcdedit
                PID:2876
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:2580
              • C:\Windows\system32\wbadmin.exe
                wbadmin delete catalog -quiet
                6⤵
                • Deletes backup catalog
                PID:2412
        • C:\Windows\SysWOW64\NOTEPAD.EXE
          "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\d472e4c0669c44a8884ac8de2feafb8d.txt
          3⤵
          • Opens file in notepad (likely ransom note)
          PID:2884
        • C:\Windows\SysWOW64\shutdown.exe
          "C:\Windows\System32\shutdown.exe" /s /t 00
          3⤵
            PID:2336
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 5 & Del "C:\Users\Admin\AppData\Local\Temp\Flash Player.exe"
          2⤵
          • Deletes itself
          • Suspicious use of WriteProcessMemory
          PID:2560
          • C:\Windows\SysWOW64\choice.exe
            choice /C Y /N /D Y /T 5
            3⤵
              PID:2672
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2284
        • C:\Windows\system32\wbengine.exe
          "C:\Windows\system32\wbengine.exe"
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3040
        • C:\Windows\System32\vdsldr.exe
          C:\Windows\System32\vdsldr.exe -Embedding
          1⤵
            PID:2568
          • C:\Windows\System32\vds.exe
            C:\Windows\System32\vds.exe
            1⤵
              PID:2720
            • C:\Windows\system32\taskeng.exe
              taskeng.exe {EE084D2C-4EE4-4BA3-B195-DB4D14D24639} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]
              1⤵
              • Suspicious use of WriteProcessMemory
              PID:2464
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:1676
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:1064
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:2672
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:3024
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:2960
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:796
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:2968
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:276
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:1908
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:2756
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:1448
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:228
              • C:\Users\Admin\AppData\Roaming\cssrs.exe
                C:\Users\Admin\AppData\Roaming\cssrs.exe
                2⤵
                • Executes dropped EXE
                PID:1896
            • C:\Windows\system32\LogonUI.exe
              "LogonUI.exe" /flags:0x0
              1⤵
                PID:2732
              • C:\Windows\system32\AUDIODG.EXE
                C:\Windows\system32\AUDIODG.EXE 0x1a0
                1⤵
                  PID:564
                • C:\Windows\system32\LogonUI.exe
                  "LogonUI.exe" /flags:0x1
                  1⤵
                    PID:2156

                  Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

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                  Downloads

                  • C:\Users\Admin\AppData\Local\Temp\d472e4c0669c44a8884ac8de2feafb8d.txt

                    Filesize

                    59B

                    MD5

                    403bb7ecdfbb13b27a7b7ae2e6b8014f

                    SHA1

                    8277f0e4ae5648dc81e824e8a7ee36f80adbdbef

                    SHA256

                    08819d4f60facc62ae8564157cc34163eb7e5ad4c4732109c9d4a7d20e76f783

                    SHA512

                    b4b14e33bc11c99c839ef8f963c972f62fe63ec9af0300e3aeaf1868c95f71e66355e437dd4902f5d9904dc54beb94e4aec6c214e3c88ce0d81eb761e283393e

                  • C:\Users\Admin\AppData\Local\Temp\jizqmldlsv.gif

                    Filesize

                    422KB

                    MD5

                    705a10144ffd51597b863af7b6dc6761

                    SHA1

                    68e3ff4a0c5c498e958431cc4379f33042900194

                    SHA256

                    cbc8a31345ac302681cac85e5347de1ffcbaa12bdc50c679ecf99cda7fc5157e

                    SHA512

                    00685116a9471c2f95534932eedf29e70c0486cdb16235770ff3ab8655396ead19378c29f57f298ac2d17e202ed8e75b4ecab282a1be4cb40dd27774568107a3

                  • C:\Users\Admin\Documents\RESTORE.txt

                    Filesize

                    171B

                    MD5

                    3e6c4d018bb590573ad262cc1715d7b9

                    SHA1

                    d1b9156f9c88feb4d8da5d6b18d7861622794960

                    SHA256

                    06442ae852bdef53ce2a12888f2204f0b2facd1fb43cbba94869adc97e6ad00a

                    SHA512

                    4bba042c7c071d1f63ac51c1e2c4ff440c5bf00f1836668cc7048f35332da9a7324b41394596c0da9fb77c8a6ececc722f955185dd0f983c2c236ea19bfb0b19

                  • \Users\Admin\AppData\Local\Temp\7e75b82901b04d7b90cca18e2671dba6.exe

                    Filesize

                    1.2MB

                    MD5

                    e4ea9a5aee8f1d7576d8237b52fe345c

                    SHA1

                    abf5a63f22b6d953a3cf8304f52cd2ceb1701055

                    SHA256

                    d2d89b20e8f6fed21b4d8747df80d8c43107853e9d820cb9d5aeb832a36d773b

                    SHA512

                    761f1ca9ea9dd5c2c0930d3681467924a1d4ab9cd64d02ddbe2d8555a021e96f9f8b260c3a80ea96d18115999f2289686b4644ee240864a0d3000620facf90e8

                  • \Users\Admin\AppData\Roaming\cssrs.exe

                    Filesize

                    534KB

                    MD5

                    670c5e520902ccad978f4171dab178f4

                    SHA1

                    09d08afadf92f6d7303ed406f7da32ddd708090a

                    SHA256

                    d9f889aecab50e4037018337cbbe4cc3c3b0f3647dc3e97de909d3aaa0c47097

                    SHA512

                    ec01f7aae8a909435823309748179408fe8b09288c4f8ba936a1c2b24ba8c2ee81dc5b9903c8401995855ba320daf79c9f755509560ded9cc697eb777f150931

                  • memory/228-576-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/228-573-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/276-555-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/276-554-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/796-548-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/796-549-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1064-536-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1064-537-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1136-24-0x0000000000DF0000-0x0000000000F26000-memory.dmp

                    Filesize

                    1.2MB

                  • memory/1136-25-0x000007FEF5AE0000-0x000007FEF64CC000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/1136-32-0x000007FEF5AE0000-0x000007FEF64CC000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/1448-563-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1448-564-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1676-531-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1676-532-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1896-578-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1896-579-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1908-558-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/1908-557-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2156-583-0x0000000002AB0000-0x0000000002AB1000-memory.dmp

                    Filesize

                    4KB

                  • memory/2548-0-0x00000000008A0000-0x000000000092C000-memory.dmp

                    Filesize

                    560KB

                  • memory/2548-11-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2548-1-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2672-539-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2672-540-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2732-580-0x0000000002E10000-0x0000000002E11000-memory.dmp

                    Filesize

                    4KB

                  • memory/2736-33-0x000007FEF5AE0000-0x000007FEF64CC000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2736-35-0x000000001B0E0000-0x000000001B160000-memory.dmp

                    Filesize

                    512KB

                  • memory/2736-581-0x000007FEF5AE0000-0x000007FEF64CC000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2736-529-0x000000001B0E0000-0x000000001B160000-memory.dmp

                    Filesize

                    512KB

                  • memory/2736-528-0x000007FEF5AE0000-0x000007FEF64CC000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2736-31-0x0000000000A40000-0x0000000000B76000-memory.dmp

                    Filesize

                    1.2MB

                  • memory/2756-560-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2756-561-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2960-545-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2960-546-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2968-551-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2968-552-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2996-17-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2996-570-0x00000000003D0000-0x00000000003DA000-memory.dmp

                    Filesize

                    40KB

                  • memory/2996-439-0x0000000004D10000-0x0000000004D50000-memory.dmp

                    Filesize

                    256KB

                  • memory/2996-527-0x0000000004D10000-0x0000000004D50000-memory.dmp

                    Filesize

                    256KB

                  • memory/2996-16-0x0000000004D10000-0x0000000004D50000-memory.dmp

                    Filesize

                    256KB

                  • memory/2996-15-0x0000000004D10000-0x0000000004D50000-memory.dmp

                    Filesize

                    256KB

                  • memory/2996-10-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2996-582-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/2996-9-0x00000000002F0000-0x000000000037C000-memory.dmp

                    Filesize

                    560KB

                  • memory/3024-542-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB

                  • memory/3024-543-0x0000000074B40000-0x000000007522E000-memory.dmp

                    Filesize

                    6.9MB