Analysis

  • max time kernel
    121s
  • max time network
    125s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    01-12-2021 20:49

General

  • Target

    48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe

  • Size

    852KB

  • MD5

    a6e877868558e7f87f3926ee41de4ff3

  • SHA1

    452f94dad54e4cac1c7fd7bb33590538fa0e0032

  • SHA256

    48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7

  • SHA512

    8b672e2e9ba71c63395204629c09c22cf2c83b2ce46e1ea0ea6033bf1a455d50d5f6c25be1f150124250748b8444cbb6926f2db2f858ba4bdbe65d341ad200db

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .yqal

  • offline_id

    K3PMMX2aWwpnYby88Dzg7tmaIW7Tv0HMWvSyr7t1

  • payload_url

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

    http://tzgl.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-rIyEiK9ekc 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: 0356gSd743d

rsa_pubkey.plain

Extracted

Family

vidar

Version

48.9

Botnet

517

C2

https://qoto.org/@mniami

https://noc.social/@menaomi

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 6 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 4 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • 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.

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe
    "C:\Users\Admin\AppData\Local\Temp\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3112
    • C:\Users\Admin\AppData\Local\Temp\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe
      "C:\Users\Admin\AppData\Local\Temp\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4092
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\60fdf4cc-6933-42ba-8d25-cf4dccb05098" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3676
      • C:\Users\Admin\AppData\Local\Temp\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe
        "C:\Users\Admin\AppData\Local\Temp\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:684
        • C:\Users\Admin\AppData\Local\Temp\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe
          "C:\Users\Admin\AppData\Local\Temp\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:384
          • C:\Users\Admin\AppData\Local\775e5de9-5e1b-4a27-af58-7896da507682\build2.exe
            "C:\Users\Admin\AppData\Local\775e5de9-5e1b-4a27-af58-7896da507682\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:1176
            • C:\Users\Admin\AppData\Local\775e5de9-5e1b-4a27-af58-7896da507682\build2.exe
              "C:\Users\Admin\AppData\Local\775e5de9-5e1b-4a27-af58-7896da507682\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:3496
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\775e5de9-5e1b-4a27-af58-7896da507682\build2.exe" & del C:\ProgramData\*.dll & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:1668
                • C:\Windows\SysWOW64\taskkill.exe
                  taskkill /im build2.exe /f
                  8⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1996
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:3000

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\ProgramData\freebl3.dll

    MD5

    ef2834ac4ee7d6724f255beaf527e635

    SHA1

    5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

    SHA256

    a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

    SHA512

    c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

  • C:\ProgramData\mozglue.dll

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • C:\ProgramData\msvcp140.dll

    MD5

    109f0f02fd37c84bfc7508d4227d7ed5

    SHA1

    ef7420141bb15ac334d3964082361a460bfdb975

    SHA256

    334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

    SHA512

    46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

  • C:\ProgramData\nss3.dll

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • C:\ProgramData\softokn3.dll

    MD5

    a2ee53de9167bf0d6c019303b7ca84e5

    SHA1

    2a3c737fa1157e8483815e98b666408a18c0db42

    SHA256

    43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083

    SHA512

    45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

  • C:\ProgramData\vcruntime140.dll

    MD5

    7587bf9cb4147022cd5681b015183046

    SHA1

    f2106306a8f6f0da5afb7fc765cfa0757ad5a628

    SHA256

    c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

    SHA512

    0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

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

    MD5

    237cc7db072d97a949e15c2d8dbea891

    SHA1

    43ef7b53667e94ae04496fa6cf6efc7f9a8ba83f

    SHA256

    7f9669eedb0bdb3b6647128101ec024ac5fc2447bd4372fbc8b4389f5d255acb

    SHA512

    07c69dbcb95369ffcfdcbe402d582e7dcad1b5f2976f9156460197c891eefae41b43d2640df96d08c4ae2338a5c8d03aeaa662487d0635678d34622aede96b2b

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

    MD5

    5db4d4fdb4428e5d3c794ed0a7c25958

    SHA1

    374866bf683c5c6a3620d7dcfe29ef04221c4723

    SHA256

    19ee4604acc3747d7a43fe1703dcacf39ca80e58a5f20e8607172b8f7037e45e

    SHA512

    8ad3ce80577dfc0e4edfb40c548d6b5ba88ca22bca51d0c9fe757d9e155372fe4c212ae12e8f7ed13fd40369a0722399b41c5f0edf9eb03de57fbd9890b2989d

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

    MD5

    6907b927c15594dd17f489a7a413eb82

    SHA1

    3407a2836c30098d89abfaed1df51899892652d3

    SHA256

    44656018f480bc9e3fa982256ac76188bb386ced9e2091bf02edf35a0418e00a

    SHA512

    150897184c5bc5cb17009b568eb52064ced04443b91098f34537e0a13c0da23bda6ce82a9b6e4d58cf6b6310370fe549dc7bab90770a1f9491fb21894b7b43cc

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

    MD5

    6a5647f17746d35223c91e0ece23d1e1

    SHA1

    d1d2a782038ce6ea880cf0b0b8f89588c0fccc99

    SHA256

    8d25430269cef7f2f1d41a170c04e8d55c1684e67ec38b60f8befc1063132064

    SHA512

    43f1cd02c448fcac1d5c304179ee008b268f740edab1e95ce8dc160565dcb1ede4a711a92a0d4d476ab5f8937d254df2c37164ad1c5d04a4ad1ed2d166650622

  • C:\Users\Admin\AppData\Local\60fdf4cc-6933-42ba-8d25-cf4dccb05098\48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7.exe

    MD5

    a6e877868558e7f87f3926ee41de4ff3

    SHA1

    452f94dad54e4cac1c7fd7bb33590538fa0e0032

    SHA256

    48c39433626d030bb44c2b410f69db33015d89468997f4ae3037955e3557fff7

    SHA512

    8b672e2e9ba71c63395204629c09c22cf2c83b2ce46e1ea0ea6033bf1a455d50d5f6c25be1f150124250748b8444cbb6926f2db2f858ba4bdbe65d341ad200db

  • C:\Users\Admin\AppData\Local\775e5de9-5e1b-4a27-af58-7896da507682\build2.exe

    MD5

    37f77c6f8805407d31d2b2b63e853316

    SHA1

    2535b538d6c9337a10ac4ed80f5f7b6bceeea00a

    SHA256

    c19a32b2c1b56473245cb672da9d589227f52966b40c9b761765e85418052f35

    SHA512

    71208f96291b8d808e33202587882bbd771a5169e60ba1568051148535977475f345c3f61f1a1d4a413b4a3ed278d6167335d9ea49b7b318d6ee303ae3db4cb1

  • C:\Users\Admin\AppData\Local\775e5de9-5e1b-4a27-af58-7896da507682\build2.exe

    MD5

    37f77c6f8805407d31d2b2b63e853316

    SHA1

    2535b538d6c9337a10ac4ed80f5f7b6bceeea00a

    SHA256

    c19a32b2c1b56473245cb672da9d589227f52966b40c9b761765e85418052f35

    SHA512

    71208f96291b8d808e33202587882bbd771a5169e60ba1568051148535977475f345c3f61f1a1d4a413b4a3ed278d6167335d9ea49b7b318d6ee303ae3db4cb1

  • C:\Users\Admin\AppData\Local\775e5de9-5e1b-4a27-af58-7896da507682\build2.exe

    MD5

    37f77c6f8805407d31d2b2b63e853316

    SHA1

    2535b538d6c9337a10ac4ed80f5f7b6bceeea00a

    SHA256

    c19a32b2c1b56473245cb672da9d589227f52966b40c9b761765e85418052f35

    SHA512

    71208f96291b8d808e33202587882bbd771a5169e60ba1568051148535977475f345c3f61f1a1d4a413b4a3ed278d6167335d9ea49b7b318d6ee303ae3db4cb1

  • \ProgramData\mozglue.dll

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/384-133-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/384-128-0x0000000000424141-mapping.dmp

  • memory/684-126-0x00000000007AA000-0x000000000083B000-memory.dmp

    Filesize

    580KB

  • memory/684-125-0x0000000000000000-mapping.dmp

  • memory/1176-134-0x0000000000000000-mapping.dmp

  • memory/1176-140-0x0000000004820000-0x000000000489D000-memory.dmp

    Filesize

    500KB

  • memory/1176-142-0x0000000004950000-0x0000000004A29000-memory.dmp

    Filesize

    868KB

  • memory/1668-145-0x0000000000000000-mapping.dmp

  • memory/1996-146-0x0000000000000000-mapping.dmp

  • memory/3000-147-0x0000000000000000-mapping.dmp

  • memory/3112-118-0x0000000000797000-0x0000000000828000-memory.dmp

    Filesize

    580KB

  • memory/3112-121-0x0000000000900000-0x0000000000A1B000-memory.dmp

    Filesize

    1.1MB

  • memory/3496-141-0x0000000000400000-0x00000000004DC000-memory.dmp

    Filesize

    880KB

  • memory/3496-138-0x00000000004A51CD-mapping.dmp

  • memory/3496-137-0x0000000000400000-0x00000000004DC000-memory.dmp

    Filesize

    880KB

  • memory/3676-123-0x0000000000000000-mapping.dmp

  • memory/4092-122-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4092-119-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/4092-120-0x0000000000424141-mapping.dmp