Analysis

  • max time kernel
    295s
  • max time network
    300s
  • platform
    windows10-1703_x64
  • resource
    win10-20231220-en
  • resource tags

    arch:x64arch:x86image:win10-20231220-enlocale:en-usos:windows10-1703-x64system
  • submitted
    01-02-2024 04:51

General

  • Target

    5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe

  • Size

    867KB

  • MD5

    cc975551f266db95f3ce36928284233f

  • SHA1

    5fcda6c59909bd5238675c3690e15252c301ed5c

  • SHA256

    5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961

  • SHA512

    8c0faeea05ff446c1b2df632a1313a6860c7c64f6e8511a19a8ee00dce8b64ea1c413a25d2feb30dd645a9070a59753d4a22095b0b8bd517771942e51a137651

  • SSDEEP

    24576:rEgLmH/eRWc3wJnEtynDnVOFT9sSJYO7:QGmH/CWnpEtynDnLO7

Malware Config

Extracted

Family

djvu

C2

http://habrafa.com/test1/get.php

Attributes
  • extension

    .cdpo

  • offline_id

    Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1

  • payload_url

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

    http://habrafa.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-FCWSCsjEWS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0844OSkw

rsa_pubkey.plain

Extracted

Family

vidar

Version

7.6

Botnet

1b9d7ec5a25ab9d78c31777a0016a097

C2

https://t.me/tvrugrats

https://steamcommunity.com/profiles/76561199627279110

Attributes
  • profile_id_v2

    1b9d7ec5a25ab9d78c31777a0016a097

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 16 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
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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).

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
    "C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2196
    • C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
      "C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3056
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\985399a4-6228-4506-a613-c4c5bc21e5c3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:928
      • C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
        "C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4292
  • C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
    "C:\Users\Admin\AppData\Local\Temp\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe" --Admin IsNotAutoStart IsNotTask
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2328
    • C:\Users\Admin\AppData\Local\f81ca45b-6d75-45d2-b982-780f27dcc96b\build2.exe
      "C:\Users\Admin\AppData\Local\f81ca45b-6d75-45d2-b982-780f27dcc96b\build2.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:4552
  • C:\Users\Admin\AppData\Local\f81ca45b-6d75-45d2-b982-780f27dcc96b\build2.exe
    "C:\Users\Admin\AppData\Local\f81ca45b-6d75-45d2-b982-780f27dcc96b\build2.exe"
    1⤵
    • Executes dropped EXE
    PID:4376
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4376 -s 2040
      2⤵
      • Program crash
      PID:3868

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

File and Directory Permissions Modification

1
T1222

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
    Filesize

    1KB

    MD5

    8112ab2a9d7578692e66734917d00015

    SHA1

    5dc1f7cb2c66c925d195fb98784917d108a001dd

    SHA256

    919561b1927726f5218e79f21184c4bf7117db4466686fc93d3d5dbc1380033b

    SHA512

    538f1f36b44d628d2ade163cc40deb58b50cb7fbd56019d9526c8233c30771db8542ed5786d311322dfd2e9d44e979da9513c4a0bbc7416b47bb7beca90013d1

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
    Filesize

    724B

    MD5

    8202a1cd02e7d69597995cabbe881a12

    SHA1

    8858d9d934b7aa9330ee73de6c476acf19929ff6

    SHA256

    58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

    SHA512

    97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
    Filesize

    410B

    MD5

    e5809999d78f2c22fb58f0fdaad8f401

    SHA1

    bcf8cd10ffcaa5970a31eeb4871686ed4d1bca72

    SHA256

    c9f89e5852e9a9aabdf66aa57fd5e269c44535ae31e9391b0562f640415e51d6

    SHA512

    4917020e801ee01734da30f8bb8c908438072f8dd74967dec9a6209ff469e7f75ac1c034e42566e342358969f65131a0cc7c1681fa37ea11a6216d42e4b2804f

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
    Filesize

    392B

    MD5

    7d1791aaf474d7fe3cf6ec21be25eadc

    SHA1

    68f6cf3cb526c582a0cce0a0400a172d23787ca3

    SHA256

    f03df0639613b0d75d2c17b297964eb57fd6f477771872471b2a27ecddbe86f9

    SHA512

    193dd3f693c5b98415228d91d10b25bc8fb7e36192a5398f13fead21d02adaff6c2d5f459171212b9ac92bdf034747c6fb885590762bdb382f3b3568a820b72d

  • C:\Users\Admin\AppData\Local\985399a4-6228-4506-a613-c4c5bc21e5c3\5204ea509328d2ce79d99a88758e45e8757bc9171abfc4577087b456ae9d7961.exe
    Filesize

    364KB

    MD5

    80a10f076af43075bb2ce924dc58cd18

    SHA1

    fbf3db820a508d8edb738e448d9aa5855ee5ffe3

    SHA256

    7255b678d8c435bc353edeb3bfc8f4ff1e7235fb65d8040042fbaf67959c9185

    SHA512

    ebe762c95969f22777b3bdc972cfcdf706d971507495cc5299f31d3d076597897cc14299b955a58d47a96745f35959bc7f6624d7e296262ae0d3a9f7665deb0c

  • C:\Users\Admin\AppData\Local\f81ca45b-6d75-45d2-b982-780f27dcc96b\build2.exe
    Filesize

    211KB

    MD5

    87be4b0545b388183b36a3d04ba7c0cc

    SHA1

    e504a1ffac4eab2e0212f5804496a0bb0231c13f

    SHA256

    02a8bac6ef0f9b7fa748dd9cc60a94b03ea4d7944a979ac26a5c089497a3bd74

    SHA512

    fd632a2c8a6814658ce01ec3bd94ff90efbc9fa940844ec6400332ff627b6d937d2fba2ccb6d93770b342836a54ac038667e2bfd684ea1e132c32a7d530bc60e

  • C:\Users\Admin\AppData\Local\f81ca45b-6d75-45d2-b982-780f27dcc96b\build2.exe
    Filesize

    115KB

    MD5

    d98b1d6de94bb040fb75b719ffe6de68

    SHA1

    4d3a5f2d50c7fb4860fb4e0f7ef01d327858cc8d

    SHA256

    cc256846c9e289e86600621b2fe4978af4e4d06431f4c0dedfbd7a3b44e60f1a

    SHA512

    364f8ab7f8f6bf4f096f2c5712a301e97cec97fff312bd2e63828e42c1d1d2262a303f7d55d03155bf795e66be7cab5099330e8320b7d2433ef957acb4272d6d

  • C:\Users\Admin\AppData\Local\f81ca45b-6d75-45d2-b982-780f27dcc96b\build2.exe
    Filesize

    156KB

    MD5

    5f236b5574d962d7452b659e2c43eb2d

    SHA1

    310f3b0a962936604339eb1481fecfb4b33a7917

    SHA256

    42ba0757b08eb70ffe99a76dd93115b64aa14d1aea842956e724e6f3beb87712

    SHA512

    594975d041903ecbc7c7dd254336010d30e30fb5997fb52aad1893cc2910691439523c981bf3b935b5e067543321814a634fcdeb6987df66aeb1b101ed5352c0

  • C:\Users\Admin\AppData\Local\f81ca45b-6d75-45d2-b982-780f27dcc96b\build3.exe
    Filesize

    1KB

    MD5

    d1c5ed370fa88b32bc7b12db3fa8b609

    SHA1

    50c06a6be72a17120336536a0140c275cfc41c77

    SHA256

    2c32695a88f3820b1ef0606dbfa51c2a9b1d89ee943419183da4a722f1d1b36f

    SHA512

    373935ba37825afd77beea5b1feb6ca4013e39b4c6d333b35fd30f21b42b3ee686b503973404770589072be907c1fc1b656e17a82213f46c78f0823f4af082de

  • memory/2196-4-0x0000000002210000-0x000000000232B000-memory.dmp
    Filesize

    1.1MB

  • memory/2196-2-0x0000000002170000-0x000000000220E000-memory.dmp
    Filesize

    632KB

  • memory/2328-30-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-23-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-24-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-70-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-22-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-53-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-29-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-37-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-36-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/2328-34-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3056-6-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3056-3-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3056-5-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3056-17-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/3056-1-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/4292-21-0x00000000007C0000-0x0000000000854000-memory.dmp
    Filesize

    592KB

  • memory/4376-46-0x0000000000400000-0x0000000000643000-memory.dmp
    Filesize

    2.3MB

  • memory/4376-51-0x0000000000400000-0x0000000000643000-memory.dmp
    Filesize

    2.3MB

  • memory/4376-52-0x0000000000400000-0x0000000000643000-memory.dmp
    Filesize

    2.3MB

  • memory/4376-74-0x0000000000400000-0x0000000000643000-memory.dmp
    Filesize

    2.3MB

  • memory/4552-50-0x00000000008F0000-0x0000000000920000-memory.dmp
    Filesize

    192KB

  • memory/4552-49-0x00000000006F0000-0x00000000007F0000-memory.dmp
    Filesize

    1024KB