Resubmissions

15-09-2024 12:50

240915-p3e4kavfmn 10

15-09-2024 10:12

240915-l8y7vaygnm 10

Analysis

  • max time kernel
    1798s
  • max time network
    1557s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    15-09-2024 12:50

General

  • Target

    Encrypt.exe

  • Size

    1.2MB

  • MD5

    8728ba233fcb020a6a2eaabb90df630c

  • SHA1

    c6dc576f2e0423e8a0f36bba51fa7c65e1e281e7

  • SHA256

    b15052d17afc1a01e83cdc0624dd268838237f8cd66fa12c56706bdee8a61286

  • SHA512

    24e494c64647794fc9aa91da6975117d27984b4bb21859dbf0c60faba5b7f0ec26c26ebbe1ad57f185e1d7ecd4b797d530639d287456ac9bc2930a111fd4613a

  • SSDEEP

    24576:GnsJ39LyjbJkQFMhmC+6GD9gbU4+Il2L1ywD:GnsHyjtk2MYC5GD+P6

Malware Config

Extracted

Path

C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\read_it.txt

Ransom Note
Don't worry, you can return all your files! All your files like documents, photos, databases and other important are encrypted What guarantees do we give to you? You can send 3 of your encrypted files and we decrypt it for free. You must follow these steps To decrypt your files : 1) Write on our Number :+66 970417453 ( In case of no answer in 24 hours check your spam folder or write us to this e-mail: [email protected]) 2) Obtain Bitcoin (You have to pay for decryption in Bitcoins. After payment we will send you the tool that will decrypt all your files.)

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 10 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 4 IoCs
  • Deletes backup catalog 3 TTPs 2 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Disables Task Manager via registry modification
  • Suspicious Office macro 2 IoCs

    Office document equipped with macros.

  • Drops startup file 3 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 5 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 3 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Interacts with shadow copies 3 TTPs 2 IoCs

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

  • Opens file in notepad (likely ransom note) 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 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\Encrypt.exe
    "C:\Users\Admin\AppData\Local\Temp\Encrypt.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2188
    • C:\Users\Admin\AppData\Local\Temp\._cache_Encrypt.exe
      "C:\Users\Admin\AppData\Local\Temp\._cache_Encrypt.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2784
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Adds Run key to start application
        • 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:2816
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2192
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            5⤵
            • Interacts with shadow copies
            PID:1940
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic shadowcopy delete
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1052
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:616
          • C:\Windows\system32\bcdedit.exe
            bcdedit /set {default} bootstatuspolicy ignoreallfailures
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:1860
          • C:\Windows\system32\bcdedit.exe
            bcdedit /set {default} recoveryenabled no
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:2324
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3064
          • C:\Windows\system32\wbadmin.exe
            wbadmin delete catalog -quiet
            5⤵
            • Deletes backup catalog
            PID:2000
        • C:\Windows\system32\NOTEPAD.EXE
          "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
          4⤵
          • Opens file in notepad (likely ransom note)
          PID:2112
    • C:\ProgramData\Synaptics\Synaptics.exe
      "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2748
      • C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe
        "C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe" InjUpdate
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Adds Run key to start application
        • 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:2552
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2120
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            5⤵
            • Interacts with shadow copies
            PID:2788
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic shadowcopy delete
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2352
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:356
          • C:\Windows\system32\bcdedit.exe
            bcdedit /set {default} bootstatuspolicy ignoreallfailures
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:2452
          • C:\Windows\system32\bcdedit.exe
            bcdedit /set {default} recoveryenabled no
            5⤵
            • Modifies boot configuration data using bcdedit
            PID:2064
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2000
          • C:\Windows\system32\wbadmin.exe
            wbadmin delete catalog -quiet
            5⤵
            • Deletes backup catalog
            PID:2192
        • C:\Windows\system32\NOTEPAD.EXE
          "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
          4⤵
          • Opens file in notepad (likely ransom note)
          PID:2716
  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /automation -Embedding
    1⤵
    • System Location Discovery: System Language Discovery
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    PID:2572
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2620
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2104
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2084
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1692
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
          PID:2892

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\ProgramData\Synaptics\Synaptics.exe

          Filesize

          1.2MB

          MD5

          8728ba233fcb020a6a2eaabb90df630c

          SHA1

          c6dc576f2e0423e8a0f36bba51fa7c65e1e281e7

          SHA256

          b15052d17afc1a01e83cdc0624dd268838237f8cd66fa12c56706bdee8a61286

          SHA512

          24e494c64647794fc9aa91da6975117d27984b4bb21859dbf0c60faba5b7f0ec26c26ebbe1ad57f185e1d7ecd4b797d530639d287456ac9bc2930a111fd4613a

        • C:\Users\Admin\AppData\Local\Temp\._cache_Encrypt.exe

          Filesize

          533KB

          MD5

          e7d91103647b76f121b854fe806f80e2

          SHA1

          e6adca5f83dfb2cca099cf18d6960d422b82bb9e

          SHA256

          04ed744d9643830fc5f0499203a6fde506b5f2c89868695bfe179a8edb3b28c0

          SHA512

          69dc672bfe3a89ebe71b8041159afab0231701ea59438feb1f000ddddf52627c1f7c6f36bd8c2f77f037dd2659e6ef8f27db283476dae228522051659f2f67b0

        • C:\Users\Admin\AppData\Local\Temp\aj199hbrl.jpg

          Filesize

          188KB

          MD5

          c8815393aca12a41ac61c6c90fbc3913

          SHA1

          cc2d2e9adee90a390602e020df9c7d1bff606b6e

          SHA256

          6b50e64f52faf9ba766226f414d9baa84fa82b9dc8e1dedcf11923f2d6944b3e

          SHA512

          6c5ce41ab6885d1e20ce894bf4286c2469f341fc96d90eb2187e782324066f649ffdeedfb46fc14831c00cdceb180c39a5e910bc00f12b5607efed5baf17a9e9

        • C:\Users\Admin\AppData\Local\Temp\u46mEwOC.xlsm

          Filesize

          24KB

          MD5

          1efba757a4b6b02dddcdfecc257b7e2a

          SHA1

          0639af69754ed51267969fd8b0f966619a792267

          SHA256

          c30b1a68683c4f165a72d163c50bf5821613a18381c9187d7be2e0fce04ff1ce

          SHA512

          83fe65d4b539f51b45c0e1b9871707fd665f56e273b4749d4a683eceaf83f8dfee5f91e6e66b3550baea9a7b8499ca74aa33b78a2b9c427d7daed7db080f10a9

        • C:\Users\Admin\AppData\Local\Temp\u46mEwOC.xlsm

          Filesize

          23KB

          MD5

          2a1e339222cff63ea70026762ebabe8f

          SHA1

          c4225ced64a797f236084e0172e2a3d2cce9e785

          SHA256

          b24fdfbcdb77ec44a5ae289be261a16549fc2fa6c17c930a32bed9dffbc29ce9

          SHA512

          409857427ef988797beb252523e3ff1f92fbca8851b74055bd2a76ec0c04bdaefad3b6ffac4e0ed1d4161b344ceb27a3350490aee866f2ca83caa6310694db80

        • C:\Users\Admin\AppData\Local\Temp\u46mEwOC.xlsm

          Filesize

          20KB

          MD5

          49800a23f41ad3b0a70b40012eeaea78

          SHA1

          ddf388f5520f3fff090200f5a5dc375f85031c9a

          SHA256

          0d13e2050b3fb50dea61a38a32894a7d5d4b0adb757afb50aee171b385fb2d72

          SHA512

          684f73692d535b591192ecc78e91e7dfc29c905b382df996fe4e72e0e82e50ef6d38cbf3a058621422f28c431d0bab0861e9b902f07d3c84031391c06552de8b

        • C:\Users\Admin\AppData\Local\Temp\u46mEwOC.xlsm

          Filesize

          28KB

          MD5

          affa910ab495a2adacfc9b4c0516c987

          SHA1

          f64f5c274e1236fd253dd783e045dd2c53b3fb5e

          SHA256

          143ce97a6d9c36b88f5cc1f7dd10b5fb847baf88ce582046fec7b9606ebe1464

          SHA512

          074ad361b756943decea3e9f77bcf9f34a47ec4afeb88abb8319e8adaec10213a3cab95f1d3c3bbd4e02c51ab8834aca20bb9ae988b4d2a14d3b74e13098be4a

        • C:\Users\Admin\AppData\Local\Temp\u46mEwOC.xlsm

          Filesize

          17KB

          MD5

          e566fc53051035e1e6fd0ed1823de0f9

          SHA1

          00bc96c48b98676ecd67e81a6f1d7754e4156044

          SHA256

          8e574b4ae6502230c0829e2319a6c146aebd51b7008bf5bbfb731424d7952c15

          SHA512

          a12f56ff30ea35381c2b8f8af2446cf1daa21ee872e98cad4b863db060acd4c33c5760918c277dadb7a490cb4ca2f925d59c70dc5171e16601a11bc4a6542b04

        • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\bhg31lui.default-release\storage\permanent\chrome\idb\2823318777ntouromlalnodry--naod.sqlite.pk8m

          Filesize

          48KB

          MD5

          6caf311fcc5b55bd88d95ab2dd090463

          SHA1

          dd09aafdae4ad3978e91028ac6ebf88582289775

          SHA256

          d3978d0cd5c9ce1badb3bf34dba36330279e5524ce1d9e3d9b281387224fb3da

          SHA512

          c8f7ac8c8ca72c3e63c2759772c581e29118cfe4b4d96d67db41f6f48a6c62f42cb6c4ab3238b0e7ef84f3db7dc45bc40feee2e3d875046b265059c5a78d9486

        • C:\Users\Admin\Documents\~$UsePush.xlsx

          Filesize

          165B

          MD5

          ff09371174f7c701e75f357a187c06e8

          SHA1

          57f9a638fd652922d7eb23236c80055a91724503

          SHA256

          e4ba04959837c27019a2349015543802439e152ddc4baf4e8c7b9d2b483362a8

          SHA512

          e4d01e5908e9f80b7732473ec6807bb7faa5425e3154d5642350f44d7220af3cffd277e0b67bcf03f1433ac26a26edb3ddd3707715b61d054b979fbb4b453882

        • C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\read_it.txt

          Filesize

          582B

          MD5

          76e381f78e94c35d358a4fc048d3aa37

          SHA1

          361d4153f76f32d36c1edd3da27e59f41f7e2d0f

          SHA256

          db317b799b14715d1b26661dd60570faa3b5c377656d490cd2697f78271c413f

          SHA512

          ef1d2bd09d8e34eb6260d11a3ac821cdd1b6aa1dba0c8616cbed1d233979d39ceb00c369ccabb6630324ef0027a83b6b61729b2ed66d55bf249387782a1fe4e3

        • C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Command Prompt.lnk

          Filesize

          1B

          MD5

          d1457b72c3fb323a2671125aef3eab5d

          SHA1

          5bab61eb53176449e25c2c82f172b82cb13ffb9d

          SHA256

          8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

          SHA512

          ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

        • memory/2188-0-0x00000000001B0000-0x00000000001B1000-memory.dmp

          Filesize

          4KB

        • memory/2188-25-0x0000000000400000-0x0000000000545000-memory.dmp

          Filesize

          1.3MB

        • memory/2552-36-0x0000000000370000-0x00000000003FC000-memory.dmp

          Filesize

          560KB

        • memory/2572-37-0x000000005FFF0000-0x0000000060000000-memory.dmp

          Filesize

          64KB

        • memory/2748-1161-0x0000000000400000-0x0000000000545000-memory.dmp

          Filesize

          1.3MB

        • memory/2748-1162-0x0000000000400000-0x0000000000545000-memory.dmp

          Filesize

          1.3MB

        • memory/2748-1197-0x0000000000400000-0x0000000000545000-memory.dmp

          Filesize

          1.3MB

        • memory/2748-1253-0x0000000000400000-0x0000000000545000-memory.dmp

          Filesize

          1.3MB

        • memory/2784-26-0x0000000000B70000-0x0000000000BFC000-memory.dmp

          Filesize

          560KB

        • memory/2816-72-0x0000000000E20000-0x0000000000EAC000-memory.dmp

          Filesize

          560KB