Analysis

  • max time kernel
    300s
  • max time network
    207s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    04-02-2024 07:40

General

  • Target

    66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe

  • Size

    737KB

  • MD5

    93c82a57837aae4227b65a84b2e7c787

  • SHA1

    469d0f9920d93029c4cdf2832d0df9939a17e5e4

  • SHA256

    66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678

  • SHA512

    be00ea6ed8b6c3948374d46a83873adf9f40af21db5dd42985fe736dc46cb03fe72ceb8b5593aa7f30937fd92d064486b3856afd5892f1c67b518e26eba0ae64

  • SSDEEP

    12288:Q2IwAVLmgpXICA9qcs0gsq8TgvHDVEk25wZ5C2UGhh6a+Wh7P3auMkTQ9ymQAd:dAVLmAXku0gs6HDVEkXZ52Ghh9+23hQ

Malware Config

Extracted

Family

djvu

C2

http://habrafa.com/test1/get.php

Attributes
  • extension

    .cdcc

  • offline_id

    LBxKKiegnAy53rpqH3Pj2j46vwldiEt9kqHSuMt1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://habrafa.com/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-iVcrVFVRqu Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0846ASdw

rsa_pubkey.plain

Extracted

Family

vidar

Version

7.6

Botnet

1b9d7ec5a25ab9d78c31777a0016a097

C2

https://t.me/tvrugrats

https://steamcommunity.com/profiles/76561199627279110

Attributes
  • profile_id_v2

    1b9d7ec5a25ab9d78c31777a0016a097

Signatures

  • Detect Vidar Stealer 6 IoCs
  • Detected Djvu ransomware 14 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 14 IoCs
  • Loads dropped DLL 11 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe
    "C:\Users\Admin\AppData\Local\Temp\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2876
    • C:\Users\Admin\AppData\Local\Temp\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe
      "C:\Users\Admin\AppData\Local\Temp\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2624
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\40b19835-3552-4c5a-8b2b-82fab7ca9b69" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2868
      • C:\Users\Admin\AppData\Local\Temp\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe
        "C:\Users\Admin\AppData\Local\Temp\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2720
        • C:\Users\Admin\AppData\Local\Temp\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe
          "C:\Users\Admin\AppData\Local\Temp\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2532
          • C:\Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build2.exe
            "C:\Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2744
            • C:\Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build2.exe
              "C:\Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of WriteProcessMemory
              PID:1952
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 1448
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:556
          • C:\Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build3.exe
            "C:\Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:576
            • C:\Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build3.exe
              "C:\Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:2392
              • 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:304
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {E37D10B5-6EF8-4F46-BB08-6F74D8DC85FF} S-1-5-21-3308111660-3636268597-2291490419-1000:JUBFGPHD\Admin:Interactive:[1]
    1⤵
      PID:2116
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:2444
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:1632
          • 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"
            4⤵
            • Creates scheduled task(s)
            PID:2640
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:1880
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:1908
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:2924
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2220
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:1056
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:3052
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:2544
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2700

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Execution

    Scheduled Task/Job

    1
    T1053

    Persistence

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Scheduled Task/Job

    1
    T1053

    Privilege Escalation

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Scheduled Task/Job

    1
    T1053

    Defense Evasion

    File and Directory Permissions Modification

    1
    T1222

    Modify Registry

    2
    T1112

    Subvert Trust Controls

    1
    T1553

    Install Root Certificate

    1
    T1553.004

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
      Filesize

      1KB

      MD5

      3769f53ac22cdf6658c874805d9983a5

      SHA1

      53ba470f9cd12bbfde1d1149bcad0029e0f8a84f

      SHA256

      87ec66df2ed0afbd05a6094ba5ad5bc5b3ef6807828d00323b1addb6addd1c17

      SHA512

      56ce76ea6aeaaafac14128912b31e12a16a2ca85b97ece7f3034bea5ca3b249c0cfe974b2823f35d38c46d6b3faa7278732b183a86c85f469c422384f08f2925

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
      Filesize

      724B

      MD5

      8202a1cd02e7d69597995cabbe881a12

      SHA1

      8858d9d934b7aa9330ee73de6c476acf19929ff6

      SHA256

      58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

      SHA512

      97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
      Filesize

      410B

      MD5

      924c06ddccd2c925a6cb3f797fdf0027

      SHA1

      536baf51270d93cbcc4f9dfe9d923173f122904a

      SHA256

      781d97d4227a83b9e3370d027863b7787d5018b7f0fc7503de272a3e0d676e4f

      SHA512

      4b5a7f4435c475f187456ef10081ad99b0fdcd667aea1671a2a9359b4175c34d8fe4e1f15ffed3dded80396834dda5ae6b1959dd1e6c6fd56ec82af12512f7f4

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
      Filesize

      344B

      MD5

      977a999829ab8317f08e7a242e6d2402

      SHA1

      061aa699aa6a2aae75584e4075ab29dfc4d0cede

      SHA256

      7ef483988fef975c46560cd5225209d0ee8e62f9de4f4e26687ee8acf0dd8076

      SHA512

      7474c42ebad490443efd8ae2205b3efc553cdc6437b24fcffee52229bd43d998bbea42cc0ed09f7c3456629120032cc93896f7299196e9f6bc3473ba019e426e

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
      Filesize

      392B

      MD5

      8e5da86011107e0ceddf89b36c7acc97

      SHA1

      5f8ae65038e5a204fbdac334a1a6c5fa41c43d34

      SHA256

      e97f0b51ae52b191485c0c9dfaaf4b5ff14bdcba32df5541da8c18f24848a19a

      SHA512

      aae5be5e2eb9ba1e0fecf8fe656663439e949731d786fed897cb232b9a5cde79c3e8a8468ff1ec9bba32f7a07c6bab4282ae6e9c48ed30743417b6e4bc42e3b2

    • C:\Users\Admin\AppData\Local\40b19835-3552-4c5a-8b2b-82fab7ca9b69\66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678.exe
      Filesize

      737KB

      MD5

      93c82a57837aae4227b65a84b2e7c787

      SHA1

      469d0f9920d93029c4cdf2832d0df9939a17e5e4

      SHA256

      66279c22a4fc8671cbf5e2aa2790c0a869921b12600d3d55e4056e5da81ee678

      SHA512

      be00ea6ed8b6c3948374d46a83873adf9f40af21db5dd42985fe736dc46cb03fe72ceb8b5593aa7f30937fd92d064486b3856afd5892f1c67b518e26eba0ae64

    • C:\Users\Admin\AppData\Local\Temp\Cab496F.tmp
      Filesize

      65KB

      MD5

      ac05d27423a85adc1622c714f2cb6184

      SHA1

      b0fe2b1abddb97837ea0195be70ab2ff14d43198

      SHA256

      c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

      SHA512

      6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

    • C:\Users\Admin\AppData\Local\Temp\Tar6B90.tmp
      Filesize

      171KB

      MD5

      9c0c641c06238516f27941aa1166d427

      SHA1

      64cd549fb8cf014fcd9312aa7a5b023847b6c977

      SHA256

      4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

      SHA512

      936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

    • \Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build2.exe
      Filesize

      385KB

      MD5

      63e4a9cd7a8b37335b5f18cefc5dd9d2

      SHA1

      c781a30935afc452b108cc78724b60f389b78874

      SHA256

      c1e75efde3fd1da605135e5c3ffab0073299c80632d136f8eeba9d4a7c98c70f

      SHA512

      3818b5966938704c5830acb5426db7791f6ae476853248d8984b1aff35a6722a0684bea54a53ef6ded1f301f6de9ed044d45f007457a9c0f3a7ea3afc7bf0ecc

    • \Users\Admin\AppData\Local\f87b98d7-73cb-44bc-bc69-617bf596d667\build3.exe
      Filesize

      299KB

      MD5

      41b883a061c95e9b9cb17d4ca50de770

      SHA1

      1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

      SHA256

      fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

      SHA512

      cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

    • memory/576-181-0x00000000009A0000-0x0000000000AA0000-memory.dmp
      Filesize

      1024KB

    • memory/576-183-0x0000000000220000-0x0000000000224000-memory.dmp
      Filesize

      16KB

    • memory/1056-325-0x0000000000870000-0x0000000000970000-memory.dmp
      Filesize

      1024KB

    • memory/1880-270-0x0000000000C30000-0x0000000000D30000-memory.dmp
      Filesize

      1024KB

    • memory/1952-239-0x0000000000400000-0x0000000000643000-memory.dmp
      Filesize

      2.3MB

    • memory/1952-226-0x0000000000400000-0x0000000000643000-memory.dmp
      Filesize

      2.3MB

    • memory/1952-80-0x0000000000400000-0x0000000000643000-memory.dmp
      Filesize

      2.3MB

    • memory/1952-74-0x0000000000400000-0x0000000000643000-memory.dmp
      Filesize

      2.3MB

    • memory/1952-79-0x0000000000400000-0x0000000000643000-memory.dmp
      Filesize

      2.3MB

    • memory/1952-72-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
      Filesize

      4KB

    • memory/2392-184-0x0000000000400000-0x0000000000406000-memory.dmp
      Filesize

      24KB

    • memory/2392-189-0x0000000000400000-0x0000000000406000-memory.dmp
      Filesize

      24KB

    • memory/2392-187-0x0000000000400000-0x0000000000406000-memory.dmp
      Filesize

      24KB

    • memory/2444-240-0x0000000000890000-0x0000000000990000-memory.dmp
      Filesize

      1024KB

    • memory/2532-35-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2532-138-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2532-56-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2532-57-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2532-54-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2532-61-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2532-50-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2532-49-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2532-36-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2544-353-0x0000000000290000-0x0000000000390000-memory.dmp
      Filesize

      1024KB

    • memory/2624-8-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2624-9-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2624-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
      Filesize

      4KB

    • memory/2624-27-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2624-5-0x0000000000400000-0x0000000000537000-memory.dmp
      Filesize

      1.2MB

    • memory/2720-28-0x00000000004D0000-0x0000000000562000-memory.dmp
      Filesize

      584KB

    • memory/2720-30-0x00000000004D0000-0x0000000000562000-memory.dmp
      Filesize

      584KB

    • memory/2744-78-0x0000000000230000-0x0000000000260000-memory.dmp
      Filesize

      192KB

    • memory/2744-76-0x0000000000530000-0x0000000000630000-memory.dmp
      Filesize

      1024KB

    • memory/2876-4-0x0000000001E70000-0x0000000001F8B000-memory.dmp
      Filesize

      1.1MB

    • memory/2876-0-0x0000000000220000-0x00000000002B2000-memory.dmp
      Filesize

      584KB

    • memory/2876-7-0x0000000000220000-0x00000000002B2000-memory.dmp
      Filesize

      584KB

    • memory/2876-1-0x0000000000220000-0x00000000002B2000-memory.dmp
      Filesize

      584KB

    • memory/2924-298-0x0000000000980000-0x0000000000A80000-memory.dmp
      Filesize

      1024KB