Analysis

  • max time kernel
    178s
  • max time network
    191s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    10-05-2022 05:39

General

  • Target

    buildp.exe

  • Size

    841KB

  • MD5

    efed57771cb41fdde63781d1e195912c

  • SHA1

    a71b0545951c99eb6ad4a50c22d02c958003d920

  • SHA256

    72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d

  • SHA512

    6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .gtys

  • offline_id

    qwVQoIsE2xLety0oNWloOilSDuIBXJGK86LM3ot1

  • 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-fnn5kv33Vv 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: 0439JIjdm

rsa_pubkey.plain

Extracted

Family

vidar

Version

52

Botnet

517

C2

https://t.me/hollandracing

https://busshi.moe/@ronxik321

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 8 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

  • suricata: ET MALWARE W32/Agent.OGR!tr.pws Stealer

    suricata: ET MALWARE W32/Agent.OGR!tr.pws Stealer

  • suricata: ET MALWARE Win32/Vodkagats Loader Requesting Payload

    suricata: ET MALWARE Win32/Vodkagats Loader Requesting Payload

  • 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.

  • 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 2 IoCs

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

  • 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\buildp.exe
    "C:\Users\Admin\AppData\Local\Temp\buildp.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2612
    • C:\Users\Admin\AppData\Local\Temp\buildp.exe
      "C:\Users\Admin\AppData\Local\Temp\buildp.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4004
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\8530ed0f-ee90-4d2f-beb3-beb15e88ed35" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4264
      • C:\Users\Admin\AppData\Local\Temp\buildp.exe
        "C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1516
        • C:\Users\Admin\AppData\Local\Temp\buildp.exe
          "C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4236
          • C:\Users\Admin\AppData\Local\0d7c03c0-0131-4871-b014-a16aca28c082\build2.exe
            "C:\Users\Admin\AppData\Local\0d7c03c0-0131-4871-b014-a16aca28c082\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:5012
            • C:\Users\Admin\AppData\Local\0d7c03c0-0131-4871-b014-a16aca28c082\build2.exe
              "C:\Users\Admin\AppData\Local\0d7c03c0-0131-4871-b014-a16aca28c082\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:4588

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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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

    e25910c9dde509fb4760477c89c6a4e7

    SHA1

    4b9d17d6b3629d88bc92663e2a706fa67b32490b

    SHA256

    05d4cc0a64e2fc232b3b4266c47d4925a30f8ba1d90f028646e3689a03a2f5ad

    SHA512

    a1ad80c2fe9798f3e90327f1775624d0ed3d07c10021ac627521d3eed9bb87b09797bf0fd7be4e302ec26efb7e5fc590c4a8c50cd9ed411796ee101fe156ce09

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

    Filesize

    471B

    MD5

    d5710c53f1f6105506249979b718c4a4

    SHA1

    c65a130aaec812b70a391ec99a749e4924977ff5

    SHA256

    2df6a7244a4daa65c6af33cb0eed7119dc6f6c3f7074ca39b6136da058e5645f

    SHA512

    c578d84534c0dfd73a844a9d88e0051f3c59bceda41b2806ce10d3cdda126e78cc26d4cb16de570294c17b187669cee9967916f17dd137ca40bc59bc36704603

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

    Filesize

    402B

    MD5

    f90ead84286017e32094c1594f59c5f8

    SHA1

    016cd719ae3d951823984105a724259ca632f0de

    SHA256

    bf1aaa00ceaf0bd837d3de094a42be9517ee866f05627f0036212cd490520182

    SHA512

    ec8494dcbe89252c1c91ec6fb51b94876b68c7e6e26510ebb09a4114fa6025da7f107c2e0c94bfb42b0da24d44c5bf763f493e27593f8786a083fade2d0195a8

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

    Filesize

    396B

    MD5

    b3083c3ed35085985f748773f04c146e

    SHA1

    fb59a84b830589cf2869deb5d9b45a2917e98419

    SHA256

    b9006c42cbdad4af7f6ca46b2b901300635f72ad2c861d073885722a7e1f6e3c

    SHA512

    d974d8fcb927297b31c3a230c97d6e760cb821bebbc2e5bf192939ec424acb694c0d3437de79aa87586e6e6dc0a0e3ebb5b302a0c6f3d38ac14ac7cf1af513f2

  • C:\Users\Admin\AppData\Local\0d7c03c0-0131-4871-b014-a16aca28c082\build2.exe

    Filesize

    380KB

    MD5

    ba5461bef761e4e723c2567cfe710fe3

    SHA1

    92f94d48482ca2006caf4c50ac387d1b532e837b

    SHA256

    c9c82de52be77596153f54b192da4e91e671cc5ad01d6bfe0011fd8e9d5723fa

    SHA512

    24f0e12607ff0672c236e92193b659c5121059b5ae56545790830081835120aca464e003066455227d31ee8445787fdfbf90a8be29af9e837edbe7e808e11149

  • C:\Users\Admin\AppData\Local\0d7c03c0-0131-4871-b014-a16aca28c082\build2.exe

    Filesize

    380KB

    MD5

    ba5461bef761e4e723c2567cfe710fe3

    SHA1

    92f94d48482ca2006caf4c50ac387d1b532e837b

    SHA256

    c9c82de52be77596153f54b192da4e91e671cc5ad01d6bfe0011fd8e9d5723fa

    SHA512

    24f0e12607ff0672c236e92193b659c5121059b5ae56545790830081835120aca464e003066455227d31ee8445787fdfbf90a8be29af9e837edbe7e808e11149

  • C:\Users\Admin\AppData\Local\0d7c03c0-0131-4871-b014-a16aca28c082\build2.exe

    Filesize

    380KB

    MD5

    ba5461bef761e4e723c2567cfe710fe3

    SHA1

    92f94d48482ca2006caf4c50ac387d1b532e837b

    SHA256

    c9c82de52be77596153f54b192da4e91e671cc5ad01d6bfe0011fd8e9d5723fa

    SHA512

    24f0e12607ff0672c236e92193b659c5121059b5ae56545790830081835120aca464e003066455227d31ee8445787fdfbf90a8be29af9e837edbe7e808e11149

  • C:\Users\Admin\AppData\Local\8530ed0f-ee90-4d2f-beb3-beb15e88ed35\buildp.exe

    Filesize

    841KB

    MD5

    efed57771cb41fdde63781d1e195912c

    SHA1

    a71b0545951c99eb6ad4a50c22d02c958003d920

    SHA256

    72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d

    SHA512

    6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080

  • memory/1516-142-0x00000000021B6000-0x0000000002247000-memory.dmp

    Filesize

    580KB

  • memory/2612-131-0x0000000002390000-0x00000000024AB000-memory.dmp

    Filesize

    1.1MB

  • memory/2612-130-0x0000000002255000-0x00000000022E6000-memory.dmp

    Filesize

    580KB

  • memory/4004-135-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4004-134-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4004-136-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4004-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4236-149-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4236-143-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4236-144-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4588-161-0x0000000060900000-0x0000000060992000-memory.dmp

    Filesize

    584KB

  • memory/4588-154-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/4588-156-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/4588-159-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/4588-160-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/5012-158-0x00000000005F0000-0x0000000000639000-memory.dmp

    Filesize

    292KB

  • memory/5012-157-0x0000000000688000-0x00000000006B2000-memory.dmp

    Filesize

    168KB