Analysis

  • max time kernel
    102s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    24/04/2022, 06:52

General

  • Target

    f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe

  • Size

    727KB

  • MD5

    3c4d37ac1703374663c1932f3cece4b9

  • SHA1

    d9c55b7c8f687a38a44f2e66882cece1c29f4b0e

  • SHA256

    f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c

  • SHA512

    7085c6e3045e56e43865a9214d5d5e02889e725dd831c81784ddb2cf059683e2b2fa981a56fbf8262477738d9627fa0b0e5800747f6dccfcbb5e41f213afe960

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/fhsgtsspen6/get.php

Attributes
  • extension

    .dmay

  • offline_id

    Xe4NOamOTHZrARTiL9dfVzAylFrEWLGGbr2dngt1

  • payload_url

    http://zerit.top/dl/build2.exe

    http://fuyt.org/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-FT7BNVbXC9 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: 0458JIjdm

rsa_pubkey.plain

Extracted

Family

vidar

Version

51.8

Botnet

517

C2

https://t.me/mm20220428

https://koyu.space/@ronxik123

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 9 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 5 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

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

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 5 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
    "C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4120
    • C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
      "C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2264
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\6e268579-67bc-48e3-a3a3-22763591b9e7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4648
      • C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
        "C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:456
        • C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe
          "C:\Users\Admin\AppData\Local\Temp\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:428
          • C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe
            "C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1464
            • C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe
              "C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:5096
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k netsvcs -p
    1⤵
    • Drops file in System32 directory
    • Checks processor information in registry
    • Enumerates system info in registry
    PID:2376

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\mozglue.dll

          Filesize

          133KB

          MD5

          8f73c08a9660691143661bf7332c3c27

          SHA1

          37fa65dd737c50fda710fdbde89e51374d0c204a

          SHA256

          3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

          SHA512

          0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

        • C:\ProgramData\nss3.dll

          Filesize

          1.2MB

          MD5

          bfac4e3c5908856ba17d41edcd455a51

          SHA1

          8eec7e888767aa9e4cca8ff246eb2aacb9170428

          SHA256

          e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

          SHA512

          2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

          Filesize

          727B

          MD5

          d9c694c2d95c6812aa0be903de46da96

          SHA1

          df1a733a9c6c27997c798ae4c5715cabe1ffa5e4

          SHA256

          f6f85bc0d1770803a206fbfb83c4cb888b3a24b494feac38baa3ea764cda37c0

          SHA512

          97a2eddf197aa74d1d05241008ead092f836b561bc1ad1d731d91db23d6dcce7a65d3dc1609384a3ad3fd5c858bae6c3a4361588b5a965ebf233f14410864793

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

          Filesize

          471B

          MD5

          ad8e032271f02af2a955ce10661cc3a8

          SHA1

          967d1bd99bea34c3110cc75c0c0d8b8565eae9f9

          SHA256

          d5081bf75d530e9336a6da0f9142bc10f4d06368c365cf0e33f7c99b0f643ce8

          SHA512

          bc69dfb03284cf1b8d172ff55938f238b928a0c7846306d8232ab697f54c771a9acf8b0e04a85e149da87ea8cfd9395605d0d95afc30eae1793e91399aa7eef7

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

          Filesize

          402B

          MD5

          aea34c8b51da7cdf4c2b7de56f55e319

          SHA1

          6f80a943d27b8c4cb34e83dfd87fa5fdb73e4589

          SHA256

          31234eb58e907490380759306f13d91d664e9e75cc8220a82c03550b12541e5a

          SHA512

          852bc6fda6199f875568ca25ea446be0eba546551c6108f22ea8e14ae9c36f97f5b902adc699c42c32473b7506935b03609270bd773e78c94db97fa753e2dc52

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

          Filesize

          396B

          MD5

          dc5a7aa8b7dfa4f3af59dbd003032c5e

          SHA1

          97c4f37dd7fff45c0ac5bf14ae063d419bfe8c70

          SHA256

          b057fd6cd1e7bb324da28f5ff3a3f698de762d9abc0a6d2a16a81ed435e96735

          SHA512

          7995e3fc66a418f3888196eb3791eb966f1464939a04fcc3e5bf0efb4a6e9000bd40f3455f6e41811503a9b448f369c8042054f3e74d8fde59ef29f698eb5e5e

        • C:\Users\Admin\AppData\Local\6e268579-67bc-48e3-a3a3-22763591b9e7\f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c.exe

          Filesize

          727KB

          MD5

          3c4d37ac1703374663c1932f3cece4b9

          SHA1

          d9c55b7c8f687a38a44f2e66882cece1c29f4b0e

          SHA256

          f4a1c88c30d35264ddd70baa4762dcf286cb57b1327d731e30085f1dba1ff01c

          SHA512

          7085c6e3045e56e43865a9214d5d5e02889e725dd831c81784ddb2cf059683e2b2fa981a56fbf8262477738d9627fa0b0e5800747f6dccfcbb5e41f213afe960

        • C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\7cf8eb9a-c5ad-412f-8fc0-385f08cb0b04\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • memory/428-146-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/428-143-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/428-144-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/456-145-0x0000000002180000-0x000000000229B000-memory.dmp

          Filesize

          1.1MB

        • memory/456-142-0x00000000020EB000-0x000000000217D000-memory.dmp

          Filesize

          584KB

        • memory/1464-159-0x00000000020E0000-0x0000000002129000-memory.dmp

          Filesize

          292KB

        • memory/1464-157-0x0000000000538000-0x0000000000562000-memory.dmp

          Filesize

          168KB

        • memory/2264-136-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2264-134-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2264-131-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2264-132-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4120-133-0x0000000000793000-0x0000000000825000-memory.dmp

          Filesize

          584KB

        • memory/4120-135-0x00000000021F0000-0x000000000230B000-memory.dmp

          Filesize

          1.1MB

        • memory/5096-158-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/5096-155-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/5096-160-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/5096-161-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/5096-162-0x0000000060900000-0x0000000060992000-memory.dmp

          Filesize

          584KB