Analysis

  • max time kernel
    150s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    25/01/2024, 08:49

General

  • Target

    7441a4ce9c4e8ac5928eed31e78d925c.exe

  • Size

    783KB

  • MD5

    7441a4ce9c4e8ac5928eed31e78d925c

  • SHA1

    7cacc24fbfb677bfadd4685d5f7820a946a44448

  • SHA256

    3a245127ba06fa4a0106c4562138e0dafba141aa265795859ee000662e4ca470

  • SHA512

    bfe262ba1c33ad1d0f8a26e12621a89f7156c68ab2762c0a0b3359345510fd3583599e6750d0ca5b08f4c2627f2c659c4110f47e8095f2ebdd97d1ddab6e01df

  • SSDEEP

    24576:OKflY4gwkcHJwM2mpL6di/wQyZaTzUC/B:OEgwZwlmB6ClbnB

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/fhsgtsspen6/get.php

Attributes
  • extension

    .orkf

  • offline_id

    4aBXQVNZ4BhjpMjt78QLIFtBSJPbgbflYLHrBut1

  • payload_url

    http://securebiz.org/dl/build2.exe

    http://astdg.top/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-ykQaS2tRyB Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0328gDrgo

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 12 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Executes dropped EXE 2 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 4 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe
    "C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2880
    • C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe
      "C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2852
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2888
      • C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe
        "C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2608
        • C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe
          "C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2540
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {E04C05A8-D369-4263-9068-3FBACC90C32F} S-1-5-21-3427588347-1492276948-3422228430-1000:QVMRJQQO\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2148
    • C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exe
      C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exe --Task
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2108
      • C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exe
        C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exe --Task
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        PID:436

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

          819d2f6d228f94bfebac03edbfa4bc64

          SHA1

          257acbdf2270c5285962d10460a77f422143cc8d

          SHA256

          e8b016b694a9c3224b6a405cf52010c03b7bc6c8948ecc8a3d9aaa39a18f6d47

          SHA512

          b81c03ca94d21cdb106281fa478dccd390e07bd0a03d0077952041f3d1d41a671ac9a3d4c97d41d9c8f74b14214abfcaff696a10d0615b603a7a9b1a67adde67

        • 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

          d5559587af50904e8573ad13ebd147fe

          SHA1

          2463fd1c78f2c95c2c53b585737438eb3968af4d

          SHA256

          f4a26b399d93950f008cf93feb96b60769af013cf068e6f74cf6a5cb9cf386d8

          SHA512

          0f171956daac5a7c6e583212de7b2cc5301406a114cebb1a987c46f0730776135c255d19740f51f15dd4574a844d4c65d90865671fc63b18200b11c7401cd719

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

          Filesize

          344B

          MD5

          75952e0c1c5670af5dcd379c606c9ebe

          SHA1

          27d234cc8b9469cb89c4e792c2e287f538acc28c

          SHA256

          756bd5b16422ee0ff433b7c565eccc5f04836dda10568320320cf06c20601d92

          SHA512

          775f16538dbed11a7e85b2a889d3736454a96e1e99041f483db81f1c416bc98ed3aa82f16b70033e04d9f4b88be7292fc44c36f96b3322ad7f3f6e8adb6111da

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

          Filesize

          392B

          MD5

          fea5c8a6d52044fb9537f5e6db72eae6

          SHA1

          69119fe9e4a26e99730e3be59bd198b25a799411

          SHA256

          032d8c3018e0286c276f77e55f25b2eec22d0e1fb25b08125b04682346930a09

          SHA512

          000121dbcdab19adf8c94deea2d670b08f10c5b5d97dae31c093f6e572fa4a11ed2bc586208fcc3a88c5fc717c99ee0a7799321d00f1c11bb63175ee395c3b82

        • C:\Users\Admin\AppData\Local\Temp\CabB27D.tmp

          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

        • C:\Users\Admin\AppData\Local\Temp\Tar8EF8.tmp

          Filesize

          171KB

          MD5

          9c0c641c06238516f27941aa1166d427

          SHA1

          64cd549fb8cf014fcd9312aa7a5b023847b6c977

          SHA256

          4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

          SHA512

          936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

        • C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exe

          Filesize

          783KB

          MD5

          7441a4ce9c4e8ac5928eed31e78d925c

          SHA1

          7cacc24fbfb677bfadd4685d5f7820a946a44448

          SHA256

          3a245127ba06fa4a0106c4562138e0dafba141aa265795859ee000662e4ca470

          SHA512

          bfe262ba1c33ad1d0f8a26e12621a89f7156c68ab2762c0a0b3359345510fd3583599e6750d0ca5b08f4c2627f2c659c4110f47e8095f2ebdd97d1ddab6e01df

        • memory/436-82-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/436-72-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2108-65-0x0000000000250000-0x00000000002E1000-memory.dmp

          Filesize

          580KB

        • memory/2108-64-0x0000000000250000-0x00000000002E1000-memory.dmp

          Filesize

          580KB

        • memory/2540-35-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2540-48-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2540-34-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2540-50-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2540-49-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2608-29-0x0000000000330000-0x00000000003C1000-memory.dmp

          Filesize

          580KB

        • memory/2608-27-0x0000000000330000-0x00000000003C1000-memory.dmp

          Filesize

          580KB

        • memory/2852-26-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2852-8-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2852-7-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2852-5-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2852-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2880-0-0x0000000000220000-0x00000000002B1000-memory.dmp

          Filesize

          580KB

        • memory/2880-3-0x0000000002430000-0x000000000254B000-memory.dmp

          Filesize

          1.1MB

        • memory/2880-2-0x0000000000220000-0x00000000002B1000-memory.dmp

          Filesize

          580KB