Analysis

  • max time kernel
    292s
  • max time network
    253s
  • platform
    windows10-1703_x64
  • resource
    win10-20230831-en
  • resource tags

    arch:x64arch:x86image:win10-20230831-enlocale:en-usos:windows10-1703-x64system
  • submitted
    03-09-2023 22:04

General

  • Target

    ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe

  • Size

    715KB

  • MD5

    4c23dfab585af65fdcc42271bf168446

  • SHA1

    91939cd29c0fffd69bf9ce7debec9e52dbb0cc1d

  • SHA256

    ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346

  • SHA512

    05adaea203abfca9a9995af8b3ee70b779aab4d484cf8664fb93f183c3b08d1c47a6c8a99d00590245c22fac391f7d11df9e23aa2f156763085650d48509fdad

  • SSDEEP

    12288:x+Ddul9e1zx21K+43HDK4mOBo29jclFt101nXmFtpnlg9VT0stU9r9J:x2ulQ1V21K+KG4mgjcn01ne7W9VTzmr

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/raud/get.php

Attributes
  • extension

    .nztt

  • offline_id

    fe7vbai057v1PzegcJrFdG7DjT3mL5gUtMQkLrt1

  • payload_url

    http://colisumy.com/dl/build2.exe

    http://zexeq.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-E4b0Td2MBH 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: 0772JOsie

rsa_pubkey.plain

Extracted

Family

vidar

Version

5.4

Botnet

25f5344bfcb62e75b7946c3a681aec54

C2

https://t.me/vogogor

https://steamcommunity.com/profiles/76561199545993403

Attributes
  • profile_id_v2

    25f5344bfcb62e75b7946c3a681aec54

  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.2.13 (KHTML, like Gecko) Version/16.5.2 Safari/605.2.13

Signatures

  • Detected Djvu ransomware 17 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 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
  • 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).

  • 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
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe
    "C:\Users\Admin\AppData\Local\Temp\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3836
    • C:\Users\Admin\AppData\Local\Temp\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe
      "C:\Users\Admin\AppData\Local\Temp\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:220
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\c2e22fe2-48a3-4a0f-8294-808d37fda727" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4760
      • C:\Users\Admin\AppData\Local\Temp\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe
        "C:\Users\Admin\AppData\Local\Temp\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2500
        • C:\Users\Admin\AppData\Local\Temp\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe
          "C:\Users\Admin\AppData\Local\Temp\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3652
          • C:\Users\Admin\AppData\Local\8f19697c-c281-47f6-92c1-8382ff220572\build2.exe
            "C:\Users\Admin\AppData\Local\8f19697c-c281-47f6-92c1-8382ff220572\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4392
            • C:\Users\Admin\AppData\Local\8f19697c-c281-47f6-92c1-8382ff220572\build2.exe
              "C:\Users\Admin\AppData\Local\8f19697c-c281-47f6-92c1-8382ff220572\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:1312
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\8f19697c-c281-47f6-92c1-8382ff220572\build2.exe" & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:3660
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:4380

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2KB

    MD5

    b8a5a46aaa9a6058de302e5cb8a86e07

    SHA1

    57e3bd01bad905d350f58e73567f195ed7a1e85a

    SHA256

    547e4e4f2a53b6281417420b7e8f42fd7e57b2186629c65e8de6df1f0bcf4b37

    SHA512

    f6ce11d5f61ecc8925b55691b1ea16a2420ddf8b86e0267633c95df642949dd684c673089634a621084688a4a36ae15ec5f1a6b4e199100ca328bf268bb9e8d1

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

    Filesize

    1KB

    MD5

    137e0b4840f8125ba9ba35f5e35a756e

    SHA1

    d0b462994fcea1803b01b516c97fe2c93f59f934

    SHA256

    f26683ff85626d7ef4137cebe2d9d4cb0dfcb4b7d80bc1348e3fbac919fa04d9

    SHA512

    660b7cf0fbc09d0fc3071e502545933f094d2f6462904db07d3810a3cca5ef30dba5742d67634c3d63da748e944cc375369fe1afb4ae13d073f88724dedc5ec5

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

    Filesize

    488B

    MD5

    a31cf5af2ea334c70109fc8d7ba0adb5

    SHA1

    9bff96a123461cdd76c2232a0d864e5a85e6e9c2

    SHA256

    bb57888be7eed476e84c7b44f53ababa4a895ff27370b2d24bac6f0588567425

    SHA512

    da5fc25db8891fe8a19b354aeb9d7ca9d8f9f5d1f3d642589bf7b2b3e2ee3bdfca4a8a5173f2300626f470714d77273c6b35ad37a6f0ba929549b14b5a164f14

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

    Filesize

    482B

    MD5

    e6c6ce0b4c1ac5ac4054772f4f985336

    SHA1

    40c9b959b2f091c2e1594f0b3c64676bd8f075b6

    SHA256

    9ab3bbc76745b235dc67fa9609b9e9e9d37b2498d1e9e1f85bb563f6afc6c85a

    SHA512

    106709e57362402c95a6fb7d0e3431b6307c0d6aeb7c5c4330eba57cd254c0c231251249d4fd59d562a29a559302251552491afd6a3346660358a206f48ed415

  • C:\Users\Admin\AppData\Local\8f19697c-c281-47f6-92c1-8382ff220572\build2.exe

    Filesize

    396KB

    MD5

    a3d4e0b89f4210c0ad7d8df63ff21876

    SHA1

    06ae277ba8c0b747df2498add0fdaa3e8fbe5ebb

    SHA256

    3609c3cbb2bee674e91d44e4e49197c5403a33ac9649343feacedb5ca5759ef5

    SHA512

    dfd7395e1a7fe09e404ab76196a6ca5ff1bc7f880efab4e8126ccad451fc9699ad750ce195c98cc7f449c0bff69c693884c8b2307c75fab5f616a442cabb544a

  • C:\Users\Admin\AppData\Local\8f19697c-c281-47f6-92c1-8382ff220572\build2.exe

    Filesize

    396KB

    MD5

    a3d4e0b89f4210c0ad7d8df63ff21876

    SHA1

    06ae277ba8c0b747df2498add0fdaa3e8fbe5ebb

    SHA256

    3609c3cbb2bee674e91d44e4e49197c5403a33ac9649343feacedb5ca5759ef5

    SHA512

    dfd7395e1a7fe09e404ab76196a6ca5ff1bc7f880efab4e8126ccad451fc9699ad750ce195c98cc7f449c0bff69c693884c8b2307c75fab5f616a442cabb544a

  • C:\Users\Admin\AppData\Local\8f19697c-c281-47f6-92c1-8382ff220572\build2.exe

    Filesize

    396KB

    MD5

    a3d4e0b89f4210c0ad7d8df63ff21876

    SHA1

    06ae277ba8c0b747df2498add0fdaa3e8fbe5ebb

    SHA256

    3609c3cbb2bee674e91d44e4e49197c5403a33ac9649343feacedb5ca5759ef5

    SHA512

    dfd7395e1a7fe09e404ab76196a6ca5ff1bc7f880efab4e8126ccad451fc9699ad750ce195c98cc7f449c0bff69c693884c8b2307c75fab5f616a442cabb544a

  • C:\Users\Admin\AppData\Local\c2e22fe2-48a3-4a0f-8294-808d37fda727\ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346.exe

    Filesize

    715KB

    MD5

    4c23dfab585af65fdcc42271bf168446

    SHA1

    91939cd29c0fffd69bf9ce7debec9e52dbb0cc1d

    SHA256

    ea60953547e9217b868f5e1baaea7c3209c9d6cefe76773f479528d84de91346

    SHA512

    05adaea203abfca9a9995af8b3ee70b779aab4d484cf8664fb93f183c3b08d1c47a6c8a99d00590245c22fac391f7d11df9e23aa2f156763085650d48509fdad

  • \ProgramData\mozglue.dll

    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • \ProgramData\nss3.dll

    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

  • memory/220-17-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/220-4-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/220-3-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/220-5-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/220-6-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/1312-50-0x0000000000400000-0x0000000000471000-memory.dmp

    Filesize

    452KB

  • memory/1312-103-0x0000000000400000-0x0000000000471000-memory.dmp

    Filesize

    452KB

  • memory/1312-65-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/1312-52-0x0000000000400000-0x0000000000471000-memory.dmp

    Filesize

    452KB

  • memory/1312-47-0x0000000000400000-0x0000000000471000-memory.dmp

    Filesize

    452KB

  • memory/1312-102-0x0000000000400000-0x0000000000471000-memory.dmp

    Filesize

    452KB

  • memory/1312-104-0x0000000000400000-0x0000000000471000-memory.dmp

    Filesize

    452KB

  • memory/1312-51-0x0000000000400000-0x0000000000471000-memory.dmp

    Filesize

    452KB

  • memory/2500-20-0x0000000003080000-0x000000000311A000-memory.dmp

    Filesize

    616KB

  • memory/3652-22-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-64-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-23-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-36-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-37-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-34-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-53-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-24-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-30-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3652-29-0x0000000000400000-0x0000000000537000-memory.dmp

    Filesize

    1.2MB

  • memory/3836-1-0x0000000003060000-0x00000000030FD000-memory.dmp

    Filesize

    628KB

  • memory/3836-2-0x00000000031F0000-0x000000000330B000-memory.dmp

    Filesize

    1.1MB

  • memory/4392-48-0x0000000003B80000-0x0000000003BDC000-memory.dmp

    Filesize

    368KB

  • memory/4392-46-0x0000000002010000-0x0000000002110000-memory.dmp

    Filesize

    1024KB