Analysis

  • max time kernel
    137s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/10/2022, 01:43

General

  • Target

    73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe

  • Size

    787KB

  • MD5

    7bd64a4c93cb85326992f60192377893

  • SHA1

    2bc8541da2770c3289732f3d7dfc5b82e9328fef

  • SHA256

    73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c

  • SHA512

    2bea6c7f09d5ea80ba76829cde72bf6d11c5b4f123be25fd5c2a548d8bffaf2a4da5dd5548b587d30dae073aeeba8be3782a5f662b1a1ed46cf5ef76e22ba991

  • SSDEEP

    24576:8fkcwJ9zltsv6gNmXfZEZ7xOknGOwftF:8dwzzlt0hNmXK/nwfT

Malware Config

Extracted

Family

djvu

C2

http://winnlinne.com/lancer/get.php

Attributes
  • extension

    .towz

  • offline_id

    SSHsHMHGmSIhrz50VnIxLJJX15osxEQY6iXedXt1

  • payload_url

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

    http://winnlinne.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-Kbx8mJatqN 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: 0577Jhyjd

rsa_pubkey.plain

Extracted

Family

vidar

Version

54.9

Botnet

517

C2

https://t.me/larsenup

https://ioc.exchange/@zebra54

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 10 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 4 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.

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

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe
    "C:\Users\Admin\AppData\Local\Temp\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1716
    • C:\Users\Admin\AppData\Local\Temp\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe
      "C:\Users\Admin\AppData\Local\Temp\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2968
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\cbb2a059-9d1e-4ec0-b967-5886e48f06d8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:112
      • C:\Users\Admin\AppData\Local\Temp\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe
        "C:\Users\Admin\AppData\Local\Temp\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4500
        • C:\Users\Admin\AppData\Local\Temp\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe
          "C:\Users\Admin\AppData\Local\Temp\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:732
          • C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build2.exe
            "C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3344
            • C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build2.exe
              "C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:3280
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 3280 -s 756
                7⤵
                • Program crash
                PID:1956
          • C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build3.exe
            "C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:3940
            • 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"
              6⤵
              • Creates scheduled task(s)
              PID:836
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:4256
    • 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"
      2⤵
      • Creates scheduled task(s)
      PID:2648
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3280 -ip 3280
    1⤵
      PID:4296

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\mozglue.dll

            Filesize

            593KB

            MD5

            c8fd9be83bc728cc04beffafc2907fe9

            SHA1

            95ab9f701e0024cedfbd312bcfe4e726744c4f2e

            SHA256

            ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

            SHA512

            fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

          • C:\ProgramData\nss3.dll

            Filesize

            2.0MB

            MD5

            1cc453cdf74f31e4d913ff9c10acdde2

            SHA1

            6e85eae544d6e965f15fa5c39700fa7202f3aafe

            SHA256

            ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

            SHA512

            dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

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

            Filesize

            2KB

            MD5

            dbd2ef00711b9e8a65a71435dac362a2

            SHA1

            befb6f2c27daebeef7bcd7ed80c9dc50241bf5b6

            SHA256

            5affc8e9407564299e0b7ce1953b921d33dab949c296198ce30781c952e6a047

            SHA512

            500c02a21467c0f04337258c07a1e5f71da3dbbe2105e8e63881fe064bd4ebac7db8347e5a8e554b384237961e3df35513ff14bdc4a409862ac1eca5c35bf378

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

            Filesize

            1KB

            MD5

            4b17013381328e3e6c6496e128289829

            SHA1

            77e65de2b337899996a68241226fd97196d9a73d

            SHA256

            c7cd9f2c74cb78237c3ed4e8f1a42ddc1c03c0f64a0ca70aad4a4af1f7182f71

            SHA512

            3fed91eec2c1c6de1f646b8664859691e15a3f04f17df41033616d609ab166309bd821a1190146535c3976c00b687ea1ab6fe4aa1d235b516bf6a79a29887763

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

            Filesize

            488B

            MD5

            81d468df3acfdca28908223d6b9810d9

            SHA1

            608fd2fa727cc68cb8538d2cbc5d85c55b07cd0b

            SHA256

            75c4ed50d60c8d66ef9a94c590245da1ea0eb41bac822bac5fd5921c37430695

            SHA512

            9caee0793516a6cd1f3afe7c34a884a5dc555d7e00446102b55d791e2a3deeb8206f9e94f11c8db0a88d2dd8893c1739155fbe62d4f015790e918c9e055ff78c

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

            Filesize

            482B

            MD5

            5413cbea84098663c0879e5c4735eee5

            SHA1

            3d0ab265f5f372d1d7b8fdd3f5c2da02f077fd18

            SHA256

            e3c813b9172f158958be070d629c60ded3f4c1fcd37135a1d6ff680c75d5342c

            SHA512

            d62c17a8d343443a880e2346fc2db685671cc12bdb73970e1b2d49106432c62ebc3c731b3ec69333531ecb854e150df0539c7795e31e9376bd2bf78e1c411820

          • C:\Users\Admin\AppData\Local\cbb2a059-9d1e-4ec0-b967-5886e48f06d8\73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c.exe

            Filesize

            787KB

            MD5

            7bd64a4c93cb85326992f60192377893

            SHA1

            2bc8541da2770c3289732f3d7dfc5b82e9328fef

            SHA256

            73762f0b48b71fda1b2e27e694d777f173cad907f1dc349715ecc141c69c0e4c

            SHA512

            2bea6c7f09d5ea80ba76829cde72bf6d11c5b4f123be25fd5c2a548d8bffaf2a4da5dd5548b587d30dae073aeeba8be3782a5f662b1a1ed46cf5ef76e22ba991

          • C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build2.exe

            Filesize

            255KB

            MD5

            9c3d4324a153c6438f48083bc333a962

            SHA1

            033e80e2008f4f62d2716ce0473bb0d763d52277

            SHA256

            5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

            SHA512

            8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

          • C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build2.exe

            Filesize

            255KB

            MD5

            9c3d4324a153c6438f48083bc333a962

            SHA1

            033e80e2008f4f62d2716ce0473bb0d763d52277

            SHA256

            5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

            SHA512

            8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

          • C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build2.exe

            Filesize

            255KB

            MD5

            9c3d4324a153c6438f48083bc333a962

            SHA1

            033e80e2008f4f62d2716ce0473bb0d763d52277

            SHA256

            5ee57d85a41b825060864ae85981253f28148d15586a5f6274d562dfeae93e98

            SHA512

            8cce276e59b2fcdb333fecaaa1e3ab9d0b24e25c54a6fc959b6c190441061fab67ea0d35e7077cf910b557b6a60b90c1d2260352b11789bbcd430814fcff51cd

          • C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build3.exe

            Filesize

            9KB

            MD5

            9ead10c08e72ae41921191f8db39bc16

            SHA1

            abe3bce01cd34afc88e2c838173f8c2bd0090ae1

            SHA256

            8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

            SHA512

            aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

          • C:\Users\Admin\AppData\Local\da215e80-4786-4c7b-a182-853ce395ce07\build3.exe

            Filesize

            9KB

            MD5

            9ead10c08e72ae41921191f8db39bc16

            SHA1

            abe3bce01cd34afc88e2c838173f8c2bd0090ae1

            SHA256

            8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

            SHA512

            aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

          • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

            Filesize

            9KB

            MD5

            9ead10c08e72ae41921191f8db39bc16

            SHA1

            abe3bce01cd34afc88e2c838173f8c2bd0090ae1

            SHA256

            8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

            SHA512

            aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

          • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe

            Filesize

            9KB

            MD5

            9ead10c08e72ae41921191f8db39bc16

            SHA1

            abe3bce01cd34afc88e2c838173f8c2bd0090ae1

            SHA256

            8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0

            SHA512

            aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a

          • memory/732-188-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/732-147-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/732-145-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/732-152-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/1716-137-0x00000000022E0000-0x00000000023FB000-memory.dmp

            Filesize

            1.1MB

          • memory/1716-135-0x000000000222F000-0x00000000022C1000-memory.dmp

            Filesize

            584KB

          • memory/2968-142-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2968-133-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2968-134-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2968-136-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/2968-138-0x0000000000400000-0x0000000000537000-memory.dmp

            Filesize

            1.2MB

          • memory/3280-168-0x0000000000400000-0x000000000045E000-memory.dmp

            Filesize

            376KB

          • memory/3280-167-0x0000000061E00000-0x0000000061EF3000-memory.dmp

            Filesize

            972KB

          • memory/3280-157-0x0000000000400000-0x000000000045E000-memory.dmp

            Filesize

            376KB

          • memory/3280-189-0x0000000000400000-0x000000000045E000-memory.dmp

            Filesize

            376KB

          • memory/3280-162-0x0000000000400000-0x000000000045E000-memory.dmp

            Filesize

            376KB

          • memory/3280-193-0x0000000000400000-0x000000000045E000-memory.dmp

            Filesize

            376KB

          • memory/3344-160-0x00000000005EC000-0x0000000000618000-memory.dmp

            Filesize

            176KB

          • memory/3344-161-0x00000000020B0000-0x00000000020FA000-memory.dmp

            Filesize

            296KB

          • memory/4500-146-0x00000000021BA000-0x000000000224C000-memory.dmp

            Filesize

            584KB