Analysis

  • max time kernel
    296s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    15/01/2024, 04:51

General

  • Target

    50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe

  • Size

    732KB

  • MD5

    af0965298074ef2eadb8f3d7d6e03128

  • SHA1

    7a5e64c5dde6174f92b3be9dee33f1edddf84e42

  • SHA256

    50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4

  • SHA512

    5d4d34637cfd131e901f34b6277f184c773d8f7cd2e274e9ea4bd3f20c33620c13f2ddb0e2b6257751311feace67484123b6bfe745eb2c3c3c92e17404ea3e6d

  • SSDEEP

    12288:vfPamBObYMcjyHjhtwutQAgD0ZrANrEpocfBVL/rxLpmieHITopjM:PamBOMLjAjhlEyrI6P7NpmiewgjM

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .cdpo

  • offline_id

    Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1

  • 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-FCWSCsjEWS 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: 0844OSkw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 5 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 8 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\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe
    "C:\Users\Admin\AppData\Local\Temp\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1992
    • C:\Users\Admin\AppData\Local\Temp\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe
      "C:\Users\Admin\AppData\Local\Temp\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1700
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\b50f4af1-dd35-468c-bcfd-d656faf782b5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2644
      • C:\Users\Admin\AppData\Local\Temp\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe
        "C:\Users\Admin\AppData\Local\Temp\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2820
        • C:\Users\Admin\AppData\Local\Temp\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe
          "C:\Users\Admin\AppData\Local\Temp\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2780
          • C:\Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build2.exe
            "C:\Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2932
            • C:\Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build2.exe
              "C:\Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build2.exe"
              6⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of WriteProcessMemory
              PID:2724
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 2724 -s 1480
                7⤵
                • Loads dropped DLL
                • Program crash
                PID:904
          • C:\Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build3.exe
            "C:\Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2136
            • C:\Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build3.exe
              "C:\Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:2988
              • 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:1260
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {BA8381CB-4DE3-45C1-A5DE-64213CE195AB} S-1-5-21-3308111660-3636268597-2291490419-1000:JUBFGPHD\Admin:Interactive:[1]
    1⤵
      PID:3004
      • 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:3000
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2812
          • 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:2800
      • 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:436
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2704
      • 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:2948
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:2340
      • 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:2120
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:880
      • 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:2436
        • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
          3⤵
          • Executes dropped EXE
          PID:1856

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            1KB

            MD5

            b7470a9aa569b259d4c2bb3b80ae3aa3

            SHA1

            093290296b7f1e402ef96e4b33a88f064aa401eb

            SHA256

            ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6

            SHA512

            4da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be

          • 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

            39c3a132bd7cea68356649c5d5f1cafb

            SHA1

            6e0fc5c9e3f454567982b896b52dcf807f1834f6

            SHA256

            78c1154cd230ad92aed698d2b01f3beb5d36fbc067b9d961e2d46fd2e4b2b5ed

            SHA512

            16518e9527cfd8a5dd2be409f284dd5cd80309f8d68f0498108eb02306a207e7f6efc1b3f50e4752509fb2d36d85e828a87b7d62200d357e6c5864ffa6d42762

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

            Filesize

            344B

            MD5

            430a37e2d8bcf21e8c96d159a7123a14

            SHA1

            73b1f9e234f8f280bd4188d980edef32d0a370c1

            SHA256

            d1ac160b476bdf201289213de930561aa26005179a0f6fb5e2ee851e8f004581

            SHA512

            855e227973e90f59ed4220074cdeed837e5e0a0b57d44e4d25dc65d93b5012800d51e98014790ef30608087ef80a90cce59f5d1ce81c7481b7ec10bfdb298e1c

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

            Filesize

            344B

            MD5

            56c691112e35f7f57289a1531c371577

            SHA1

            c5b8fc876ba32b115546f9de1f252542cfbbbf32

            SHA256

            1685376d9f7dfd752ac5f188138a3de208104577b9b61b930803ca750ca1986a

            SHA512

            bad210f9b8e5d569a0ec0169035cbe7bdb174f22ba6d0305db392e892a9cf06c2337818329d1962a979d6a0346693cc2ba97c5d243be9f014a3a03694fea6af9

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

            Filesize

            392B

            MD5

            86f9276ce739388ec05647a6f7b087ef

            SHA1

            58a166bad9b8665ba32647200457fef04a9c450a

            SHA256

            48c658fcdbab1bb78ea446999c7d2c20c7962d514cd30858898c421fe4f7ce7f

            SHA512

            3fd469ec04b7c24c32aae6e99ef88f8d7a5b51e57e3fb0b0bbe84c82d6fa136bb2ab6f629d4a2dcc7fbc4425dd19ed9987b4bfa9dc5746fe5958fb87dbad9e97

          • C:\Users\Admin\AppData\Local\Temp\Cab498E.tmp

            Filesize

            65KB

            MD5

            ac05d27423a85adc1622c714f2cb6184

            SHA1

            b0fe2b1abddb97837ea0195be70ab2ff14d43198

            SHA256

            c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

            SHA512

            6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

          • C:\Users\Admin\AppData\Local\Temp\Tar620E.tmp

            Filesize

            171KB

            MD5

            9c0c641c06238516f27941aa1166d427

            SHA1

            64cd549fb8cf014fcd9312aa7a5b023847b6c977

            SHA256

            4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

            SHA512

            936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

          • C:\Users\Admin\AppData\Local\b50f4af1-dd35-468c-bcfd-d656faf782b5\50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4.exe

            Filesize

            732KB

            MD5

            af0965298074ef2eadb8f3d7d6e03128

            SHA1

            7a5e64c5dde6174f92b3be9dee33f1edddf84e42

            SHA256

            50750495d27fc93afddfb07574ecad91245b3395e693a632d124196c91b1e9e4

            SHA512

            5d4d34637cfd131e901f34b6277f184c773d8f7cd2e274e9ea4bd3f20c33620c13f2ddb0e2b6257751311feace67484123b6bfe745eb2c3c3c92e17404ea3e6d

          • \Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build2.exe

            Filesize

            358KB

            MD5

            c4070da9f9b0581171af16e681ccdff8

            SHA1

            3fb4182921fdc3acd7873ebe113ac5522585312a

            SHA256

            26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0

            SHA512

            c7569cea7f1a841e7cac9cd41287dba3bcacf2cf9dee7bece88800848a7ad5dc4cd2bdc896c7389f0f1144079bbe168048b3f722bcd76fa5d6e14f3081bb6427

          • \Users\Admin\AppData\Local\48d9e432-1123-49da-9b70-c252dcb4cbed\build3.exe

            Filesize

            299KB

            MD5

            41b883a061c95e9b9cb17d4ca50de770

            SHA1

            1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

            SHA256

            fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

            SHA512

            cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

          • memory/436-266-0x00000000002B0000-0x00000000003B0000-memory.dmp

            Filesize

            1024KB

          • memory/880-329-0x0000000000400000-0x0000000000406000-memory.dmp

            Filesize

            24KB

          • memory/1700-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            Filesize

            4KB

          • memory/1700-8-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/1700-7-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/1700-5-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/1700-26-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/1992-0-0x0000000000230000-0x00000000002C2000-memory.dmp

            Filesize

            584KB

          • memory/1992-3-0x00000000004C0000-0x00000000005DB000-memory.dmp

            Filesize

            1.1MB

          • memory/1992-1-0x0000000000230000-0x00000000002C2000-memory.dmp

            Filesize

            584KB

          • memory/2120-325-0x0000000000900000-0x0000000000A00000-memory.dmp

            Filesize

            1024KB

          • memory/2136-216-0x00000000002F0000-0x00000000003F0000-memory.dmp

            Filesize

            1024KB

          • memory/2136-218-0x00000000001B0000-0x00000000001B4000-memory.dmp

            Filesize

            16KB

          • memory/2436-352-0x0000000000900000-0x0000000000A00000-memory.dmp

            Filesize

            1024KB

          • memory/2724-78-0x0000000000400000-0x000000000065E000-memory.dmp

            Filesize

            2.4MB

          • memory/2724-227-0x0000000000400000-0x000000000065E000-memory.dmp

            Filesize

            2.4MB

          • memory/2724-71-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            Filesize

            4KB

          • memory/2724-75-0x0000000000400000-0x000000000065E000-memory.dmp

            Filesize

            2.4MB

          • memory/2724-79-0x0000000000400000-0x000000000065E000-memory.dmp

            Filesize

            2.4MB

          • memory/2780-35-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2780-53-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2780-49-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2780-57-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2780-56-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2780-201-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2780-55-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2780-48-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2780-34-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2820-29-0x0000000000510000-0x00000000005A2000-memory.dmp

            Filesize

            584KB

          • memory/2820-27-0x0000000000510000-0x00000000005A2000-memory.dmp

            Filesize

            584KB

          • memory/2932-74-0x0000000000240000-0x000000000028B000-memory.dmp

            Filesize

            300KB

          • memory/2932-72-0x0000000000610000-0x0000000000710000-memory.dmp

            Filesize

            1024KB

          • memory/2948-295-0x0000000000870000-0x0000000000970000-memory.dmp

            Filesize

            1024KB

          • memory/2988-222-0x0000000000400000-0x0000000000406000-memory.dmp

            Filesize

            24KB

          • memory/2988-225-0x0000000000410000-0x0000000000591000-memory.dmp

            Filesize

            1.5MB

          • memory/2988-224-0x0000000000400000-0x0000000000406000-memory.dmp

            Filesize

            24KB

          • memory/2988-219-0x0000000000400000-0x0000000000406000-memory.dmp

            Filesize

            24KB

          • memory/3000-237-0x00000000008E0000-0x00000000009E0000-memory.dmp

            Filesize

            1024KB