Analysis

  • max time kernel
    135s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    19-04-2022 04:13

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

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.

  • Vidar Stealer 5 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 4 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 11 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of WriteProcessMemory 43 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:1096
    • C:\Users\Admin\AppData\Local\Temp\buildp.exe
      "C:\Users\Admin\AppData\Local\Temp\buildp.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1996
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f767c470-ce69-4696-886b-5ac9e4345cf5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1600
      • 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:528
        • C:\Users\Admin\AppData\Local\Temp\buildp.exe
          "C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:436
          • C:\Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe
            "C:\Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1196
            • C:\Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe
              "C:\Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Modifies system certificate store
              • Suspicious behavior: EnumeratesProcesses
              PID:1132

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    727B

    MD5

    944e0b205b374bae5a5ec6f004e0ccdc

    SHA1

    0f227641cff488a8610faf4151241c7d3b387358

    SHA256

    a27baf0aef166a0570dd5543e141fb1f97b8d6d19bf2dc1e91ee532b93927286

    SHA512

    fd1a8ea4a418817a4001af2a351d0cdce2ca25a0c5c65b762e42b5d15e57cba4a514b2169dc52946bcc168dbbdbce7b930a4e08cd3cbdc5acf3cf94d57d42007

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

    Filesize

    471B

    MD5

    7443608ab0c5be3ff317d4072fd2a4c1

    SHA1

    c14ca7d35ca32880627b147d57b520466ebb5213

    SHA256

    d4ab6ff49fb6c573a076269888c063cba4d52e9c2d0a03b488559e510df57ab2

    SHA512

    06adf1d67845a438089a93f00603ddfd734966673af1617493652d136bbaf0775c4fb64f15e4aad0caef105604414d09c756f2fee1b2d73396ad1eb93ba0f322

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

    Filesize

    402B

    MD5

    dd8fcda79a8bf49085513c4bec3e63db

    SHA1

    021a9991e5a4b6cdd1c252d94a5e4ea6ac5726ae

    SHA256

    50b8a4ceabf606d234f1825d17847fe0d3552c17553c3f2386216e78a444fbba

    SHA512

    9de51de837771b31afcef539a0a0e120991b6db0c5257afa32af56cb666041897c11467e31ac58afb36391f8b36b551b9c36457b7dd8cc60a6fefbf3ce646d6d

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

    Filesize

    344B

    MD5

    13043057469ef613f54c1ede0f306315

    SHA1

    728dd9bae4241364c281d8697985aebe975dfe38

    SHA256

    e0fe42aead242e6d975bbc5e1b08c83ad2150696b08d3a581199b9cf53326b92

    SHA512

    2b8a10c76211d28e31c3fc4a184fe1df9f3f2ae5a7350b9e28397645f5eb8b176f0b45ddb50675b8b144709065798f3f634d589a71911e790f2f90c1a36d15a9

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

    Filesize

    396B

    MD5

    7cec6154ddfc196636e839244d25d8d0

    SHA1

    a2e532fc9c034d83f4b0109a5c7a410f3d9c4f62

    SHA256

    4417abb923bc0d392b786574383457302458e47aa5de1f2f9bc8c15b79508982

    SHA512

    374df2e1c04a9dd9b747b5479de5e6df65b468325904ab09874cfdf1a478385aebb688a251c25537d9f0e0087802773bb9dce19fe1bd45af648de1da511cff8e

  • C:\Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe

    Filesize

    603KB

    MD5

    a13e3b18282318c65f096bad322b3c50

    SHA1

    2c76179e95e583b588bcd516e94e7a2da52d5299

    SHA256

    ba981a94852325debf0e4b478266f6efd8e4e9c5b149fd9ad277be0be5045768

    SHA512

    acb009f4b622ab7e8729dac2c45da975ba2305612c9575e5c8ce221edecf2d49da2236fc28b00d8f424a251765b935d8acce7bf40a1557d9fc79ba446250e786

  • C:\Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe

    Filesize

    603KB

    MD5

    a13e3b18282318c65f096bad322b3c50

    SHA1

    2c76179e95e583b588bcd516e94e7a2da52d5299

    SHA256

    ba981a94852325debf0e4b478266f6efd8e4e9c5b149fd9ad277be0be5045768

    SHA512

    acb009f4b622ab7e8729dac2c45da975ba2305612c9575e5c8ce221edecf2d49da2236fc28b00d8f424a251765b935d8acce7bf40a1557d9fc79ba446250e786

  • C:\Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe

    Filesize

    603KB

    MD5

    a13e3b18282318c65f096bad322b3c50

    SHA1

    2c76179e95e583b588bcd516e94e7a2da52d5299

    SHA256

    ba981a94852325debf0e4b478266f6efd8e4e9c5b149fd9ad277be0be5045768

    SHA512

    acb009f4b622ab7e8729dac2c45da975ba2305612c9575e5c8ce221edecf2d49da2236fc28b00d8f424a251765b935d8acce7bf40a1557d9fc79ba446250e786

  • C:\Users\Admin\AppData\Local\f767c470-ce69-4696-886b-5ac9e4345cf5\buildp.exe

    Filesize

    841KB

    MD5

    efed57771cb41fdde63781d1e195912c

    SHA1

    a71b0545951c99eb6ad4a50c22d02c958003d920

    SHA256

    72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d

    SHA512

    6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080

  • \ProgramData\mozglue.dll

    Filesize

    133KB

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll

    Filesize

    1.2MB

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • \Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe

    Filesize

    603KB

    MD5

    a13e3b18282318c65f096bad322b3c50

    SHA1

    2c76179e95e583b588bcd516e94e7a2da52d5299

    SHA256

    ba981a94852325debf0e4b478266f6efd8e4e9c5b149fd9ad277be0be5045768

    SHA512

    acb009f4b622ab7e8729dac2c45da975ba2305612c9575e5c8ce221edecf2d49da2236fc28b00d8f424a251765b935d8acce7bf40a1557d9fc79ba446250e786

  • \Users\Admin\AppData\Local\1b9ef05c-6bed-4e9b-82bd-c8956a75ce2d\build2.exe

    Filesize

    603KB

    MD5

    a13e3b18282318c65f096bad322b3c50

    SHA1

    2c76179e95e583b588bcd516e94e7a2da52d5299

    SHA256

    ba981a94852325debf0e4b478266f6efd8e4e9c5b149fd9ad277be0be5045768

    SHA512

    acb009f4b622ab7e8729dac2c45da975ba2305612c9575e5c8ce221edecf2d49da2236fc28b00d8f424a251765b935d8acce7bf40a1557d9fc79ba446250e786

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

    Filesize

    1.2MB

  • memory/436-78-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/528-69-0x00000000002C0000-0x0000000000351000-memory.dmp

    Filesize

    580KB

  • memory/528-66-0x00000000002C0000-0x0000000000351000-memory.dmp

    Filesize

    580KB

  • memory/1096-54-0x00000000002F0000-0x0000000000381000-memory.dmp

    Filesize

    580KB

  • memory/1096-58-0x00000000002F0000-0x0000000000381000-memory.dmp

    Filesize

    580KB

  • memory/1096-59-0x0000000001E80000-0x0000000001F9B000-memory.dmp

    Filesize

    1.1MB

  • memory/1132-85-0x0000000000400000-0x00000000004AA000-memory.dmp

    Filesize

    680KB

  • memory/1132-93-0x0000000000400000-0x00000000004AA000-memory.dmp

    Filesize

    680KB

  • memory/1132-91-0x0000000000400000-0x00000000004AA000-memory.dmp

    Filesize

    680KB

  • memory/1196-90-0x000000000064E000-0x00000000006B6000-memory.dmp

    Filesize

    416KB

  • memory/1196-83-0x000000000064E000-0x00000000006B6000-memory.dmp

    Filesize

    416KB

  • memory/1196-92-0x00000000004B0000-0x0000000000558000-memory.dmp

    Filesize

    672KB

  • memory/1996-55-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1996-61-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1996-62-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1996-60-0x0000000075FB1000-0x0000000075FB3000-memory.dmp

    Filesize

    8KB