djvu | 888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c

Analysis

max time kernel
142s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
02/05/2024, 12:34

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General

Target
888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
Size 771KB
Sample240502-pr319aha4v
SHA256 888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c
MD5 c730c6916e264e9fb7e2a3203324432d
SHA1 26b2c5bc05844e6da5b95dddbbb350bac5fa58d9
SHA512 78034ab9d6ea6762d35c29cbc58a7fa0cea9e0d5347c53713ab3cb260f812464e2931fa35859d8828dc04681540fb20d13897460131b780838661574c622b303
SSDEEP 12288:p0DiNVlCbG/1c5yvTWOnsphXJutagiRfwrNjMgQD5uMhJ1b1SgR+Jx:pWLwu5YWAspitfufeNjMg2hJvPR+Jx
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/2816-2-0x0000000003830000-0x000000000394B000-memory.dmp	family_djvu
behavioral2/memory/2704-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2704-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2704-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2704-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2704-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4640-35-0x0000000000400000-0x0000000001A8B000-memory.dmp	family_djvu
behavioral2/memory/3488-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3488-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1688	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5f4884ca-885d-4736-ad92-b12560c8b877\\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe\" --AutoStart"	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2816 set thread context of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 4640 set thread context of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2704	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
2704	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
3488	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
3488	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2816 wrote to memory of 2704	2816	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	80
PID 2704 wrote to memory of 1688	2704	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	82
PID 2704 wrote to memory of 1688	2704	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	82
PID 2704 wrote to memory of 1688	2704	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	82
PID 2704 wrote to memory of 4640	2704	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	83
PID 2704 wrote to memory of 4640	2704	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	83
PID 2704 wrote to memory of 4640	2704	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	83
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86
PID 4640 wrote to memory of 3488	4640	888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe	86

C:\Users\Admin\AppData\Local\Temp\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
"C:\Users\Admin\AppData\Local\Temp\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
  "C:\Users\Admin\AppData\Local\Temp\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5f4884ca-885d-4736-ad92-b12560c8b877" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1688
- - C:\Users\Admin\AppData\Local\Temp\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
    "C:\Users\Admin\AppData\Local\Temp\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4640
  - - C:\Users\Admin\AppData\Local\Temp\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
      "C:\Users\Admin\AppData\Local\Temp\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 1900c86cf885b5a30f4c6978db628caa35291d0ea1c37ada12638fadadb66467
MD5 1954f91d1857433a6e671fc2134627c4
SHA1 6ec0f77b96e790e17142ddafd79cf8a0d7873da0
SHA512 ca48210f22c6391ab07e05f4cb06729673713214ec81d6934fdade2df472f2f6af013bdb7dbaf3baaf678e771a01604a654b22ec696f3f9a93fe8e73b77ba129
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 0e9787fb11f5e85ffbda57b5bdb8dd2d3a6ce0895b55c6703ec0512aaada1179
MD5 ed1d1476602e77f235cdbf626a10facb
SHA1 e0d65a08a81dad3d00ced15ecf0e11f5f4e101d4
SHA512 f380b1173ba84c8bad93a6abec0ae1fcbd88234df7249e33f9d87fae4bbf5ac6e4c40833b43d66729f3901934dfba7d4af6b8b86c2b3766490f7e64283fa69e8
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 45e28183cdb59899cf73aadfaf785be725886297a5e4df75b84d10a63d3a9464
MD5 19687e7aa5066fc0e47beadc54c93d31
SHA1 bcc514861cf1e67de4b1a8bcd09b7b3e68b66633
SHA512 a33062e46304fc3cd9678a0c350610694e811231f76e5484c82b881ec4ff76016d4929c319eb16b50fe1f1df829e7e9552a430f9c80494642330f7c5a0413c43
MD5 SHA1 SHA512

Submit Download

888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe

Path C:\Users\Admin\AppData\Local\5f4884ca-885d-4736-ad92-b12560c8b877\888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c.exe
Size 771KB
SHA256 888761d2ed17c654af0fa1e70090a4ecf34945ea68a0a975770a0ff36b08bd3c
MD5 c730c6916e264e9fb7e2a3203324432d
SHA1 26b2c5bc05844e6da5b95dddbbb350bac5fa58d9
SHA512 78034ab9d6ea6762d35c29cbc58a7fa0cea9e0d5347c53713ab3cb260f812464e2931fa35859d8828dc04681540fb20d13897460131b780838661574c622b303
SSDEEP 12288:p0DiNVlCbG/1c5yvTWOnsphXJutagiRfwrNjMgQD5uMhJ1b1SgR+Jx:pWLwu5YWAspitfufeNjMg2hJvPR+Jx
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2704-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2704-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2816-2-0x0000000003830000-0x000000000394B000-memory.dmp

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memory/2816-1-0x0000000003790000-0x000000000382E000-memory.dmp

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memory/3488-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3488-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4640-24-0x0000000000400000-0x0000000001A8B000-memory.dmp

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memory/4640-35-0x0000000000400000-0x0000000001A8B000-memory.dmp

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