Analysis

  • max time kernel
    152s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-03-2023 18:57

General

  • Target

    99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe

  • Size

    702KB

  • MD5

    1ceb7812c1ee3c357a4b64eb84ac2116

  • SHA1

    ab28c3d707cc1b0537e71eda11821334d61469a1

  • SHA256

    99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725

  • SHA512

    8179dc3e107250e16f954eab6ded02e215e5aef8360d74a3f6cc1f49be93c49fdaeb3416d2bdc692d3435af304adf53d174054070cd30375e2de6db421fba926

  • SSDEEP

    12288:GbClTZay6o4re/uO1n0+CdsiE4k3CcgdfmixfTMOtNt5FLUNg4:GbyayPzuO10P+idUodOutb5FG

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test2/get.php

Attributes
  • extension

    .nifr

  • offline_id

    FCP2fiITr4rryFhFBnA59GMgwES5CunmcbPc76t1

  • payload_url

    http://uaery.top/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-v8HcfXTy5x 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: support@freshmail.top Reserve e-mail address to contact us: datarestorehelp@airmail.cc Your personal ID: 0679SUjhw

rsa_pubkey.plain

Extracted

Family

vidar

Version

3.2

Botnet

5df88deb5dde677ba658b77ad5f60248

C2

https://steamcommunity.com/profiles/76561199489580435

https://t.me/tabootalks

Attributes
  • profile_id_v2

    5df88deb5dde677ba658b77ad5f60248

  • user_agent

    Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36 OPR/91.0.4516.79

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
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe
    "C:\Users\Admin\AppData\Local\Temp\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1220
    • C:\Users\Admin\AppData\Local\Temp\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe
      "C:\Users\Admin\AppData\Local\Temp\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4428
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\7bb98830-a63d-4684-a4d3-a8e5e0da4788" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4940
      • C:\Users\Admin\AppData\Local\Temp\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe
        "C:\Users\Admin\AppData\Local\Temp\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1716
        • C:\Users\Admin\AppData\Local\Temp\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe
          "C:\Users\Admin\AppData\Local\Temp\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:5024
          • C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe
            "C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4620
            • C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe
              "C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe"
              6⤵
              • Checks computer location settings
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:2536
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe" & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:4436
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:2416

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

3
T1005

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

    ee7ad9d8f28e0558a94e667206e8a271

    SHA1

    b49a079526da92d55f2d1bc66659836c0f90a086

    SHA256

    9eeeef2cbd8192c6586ffa64114ad0c3e8e5ab3a73817e1044895517c6eba712

    SHA512

    0c1596e7b8e54e0cce8139a339c4c34f5f9391ce0b7051673abe7a43f174f292e0d3267b1ce1186247535941b416962b6fe63cb03855ddea254cf09fddad3223

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

    1KB

    MD5

    6a3b8331e801f083b403b0857ed8d574

    SHA1

    48d275731f1dbd0630d1ca55a1b05f149a011d1f

    SHA256

    98651a2da4a4613bc2a03c4128926fe6b05f1af8a7a21e1fedec75db013706a0

    SHA512

    7527b8857707c8822e4b7f5049ddc9b4c49933e68535690746d84b7f0187a10f36e874719bdb1bf3ba8b035568a7cbafd687b80c4621dc35552d73f7e497071d

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

    488B

    MD5

    629f0e3565f6e284d5c32fbdd890681c

    SHA1

    cc3baac991f3d73c9bbe1cdc98f7feaccbf3ca12

    SHA256

    26ff2c23a271b7a2b0a6b55ff74e9e0b6aa5c0e3426a5138fa6a62c38a371b7e

    SHA512

    e05bcbb57a6d2cb4e6b011a0f67d23dc0d272656f67c3ce3c3c08e28da419f523b93bff9c1126b3941441c2b5464917ba877822c4be0c3de7bda7751497eec2b

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

    482B

    MD5

    2aed4a65ec5abcda3828c85a22fe59c8

    SHA1

    3a0b7f26f85124441bd65595d1cf9d7447aaee35

    SHA256

    a51af053792218ae34abf6c324f5568ccad0d6118d3fde89888d63ff01150571

    SHA512

    a9def5b04ff2f89d3f4b85876878a09830f93d849ea2e11461d6755269118e9800a16ad1b3b39ed651c166affecd38fe396a092ece27d7cb03255be4a7449e85

  • C:\Users\Admin\AppData\Local\7bb98830-a63d-4684-a4d3-a8e5e0da4788\99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725.exe
    Filesize

    702KB

    MD5

    1ceb7812c1ee3c357a4b64eb84ac2116

    SHA1

    ab28c3d707cc1b0537e71eda11821334d61469a1

    SHA256

    99e748ca7621446e5a5f1f766db667f0fadffcb9bbdb8c760fbb5dcccf6be725

    SHA512

    8179dc3e107250e16f954eab6ded02e215e5aef8360d74a3f6cc1f49be93c49fdaeb3416d2bdc692d3435af304adf53d174054070cd30375e2de6db421fba926

  • C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe
    Filesize

    416KB

    MD5

    aa18968e6cfbdc382ada6a3ed2852085

    SHA1

    4a41fa1a182916d5790aa2071106b3441d64468d

    SHA256

    c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb

    SHA512

    8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845

  • C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe
    Filesize

    416KB

    MD5

    aa18968e6cfbdc382ada6a3ed2852085

    SHA1

    4a41fa1a182916d5790aa2071106b3441d64468d

    SHA256

    c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb

    SHA512

    8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845

  • C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe
    Filesize

    416KB

    MD5

    aa18968e6cfbdc382ada6a3ed2852085

    SHA1

    4a41fa1a182916d5790aa2071106b3441d64468d

    SHA256

    c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb

    SHA512

    8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845

  • C:\Users\Admin\AppData\Local\c892ed16-6200-4760-891e-493a4e63134f\build2.exe
    Filesize

    416KB

    MD5

    aa18968e6cfbdc382ada6a3ed2852085

    SHA1

    4a41fa1a182916d5790aa2071106b3441d64468d

    SHA256

    c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb

    SHA512

    8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845

  • memory/1220-136-0x0000000002740000-0x000000000285B000-memory.dmp
    Filesize

    1.1MB

  • memory/2536-174-0x0000000000400000-0x000000000046C000-memory.dmp
    Filesize

    432KB

  • memory/2536-258-0x0000000000400000-0x000000000046C000-memory.dmp
    Filesize

    432KB

  • memory/2536-176-0x0000000000400000-0x000000000046C000-memory.dmp
    Filesize

    432KB

  • memory/2536-257-0x0000000000400000-0x000000000046C000-memory.dmp
    Filesize

    432KB

  • memory/2536-255-0x0000000000400000-0x000000000046C000-memory.dmp
    Filesize

    432KB

  • memory/2536-171-0x0000000000400000-0x000000000046C000-memory.dmp
    Filesize

    432KB

  • memory/2536-173-0x0000000000400000-0x000000000046C000-memory.dmp
    Filesize

    432KB

  • memory/2536-187-0x0000000061E00000-0x0000000061EF3000-memory.dmp
    Filesize

    972KB

  • memory/4428-137-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4428-135-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4428-148-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4428-134-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4428-138-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4620-175-0x0000000004800000-0x0000000004857000-memory.dmp
    Filesize

    348KB

  • memory/5024-158-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-268-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-151-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-153-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-159-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-177-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-263-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-265-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-266-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-267-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/5024-152-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB