djvu | 455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63

Analysis

max time kernel
142s
max time network
124s
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, 12:36

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General

Target
455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
Size 772KB
Sample240502-ps2jtaha6w
SHA256 455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63
MD5 f48c70c5e5646426429b9f5d4677c7f6
SHA1 87a9c77f229116ba62b0847f5287e8b12bd535d2
SHA512 404fea329b8ce254bdd85ca21a8954bc7e61cd52913d368318987e972f5bbce1104e2de5330e973b2f864929fa1998dd35d47c6cb72b2025e1bea75bcd671451
SSDEEP 24576:pBLi+Eu3y80ZrzxFgJAXi0vVhZCum1GuBak:pBL1N3ybrzbgJAX1vLE7G
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2200-2-0x0000000003850000-0x000000000396B000-memory.dmp	family_djvu
behavioral2/memory/4520-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4520-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4520-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4520-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4520-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/428-41-0x0000000000400000-0x0000000000537000-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
1004	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\\c6400751-7c7f-4529-b951-1ca0f2e2a61c\\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe\" --AutoStart"	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.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
3	api.2ip.ua
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2200 set thread context of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 940 set thread context of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85

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
4520	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
4520	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
428	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
428	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 2200 wrote to memory of 4520	2200	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	80
PID 4520 wrote to memory of 1004	4520	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	81
PID 4520 wrote to memory of 1004	4520	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	81
PID 4520 wrote to memory of 1004	4520	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	81
PID 4520 wrote to memory of 940	4520	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	82
PID 4520 wrote to memory of 940	4520	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	82
PID 4520 wrote to memory of 940	4520	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	82
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85
PID 940 wrote to memory of 428	940	455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe	85

C:\Users\Admin\AppData\Local\Temp\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
"C:\Users\Admin\AppData\Local\Temp\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Users\Admin\AppData\Local\Temp\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
  "C:\Users\Admin\AppData\Local\Temp\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4520
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c6400751-7c7f-4529-b951-1ca0f2e2a61c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1004
- - C:\Users\Admin\AppData\Local\Temp\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
    "C:\Users\Admin\AppData\Local\Temp\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:940
  - - C:\Users\Admin\AppData\Local\Temp\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
      "C:\Users\Admin\AppData\Local\Temp\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:428

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

Submit Download

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 5396989db2747de6b79ed3ed5750481b3fcb3ccb0c0c2b5d5eb24ae6f3421a9b
MD5 665e593749ee73c9b2200135214ae93e
SHA1 045335e9c5e9ea2e9cf657937b82f9d751d6a00d
SHA512 811663ca782e06ea1b144f28d335c8cf278f0c79c7d192fe11695bbe36edd3a8bced6b88df59a19cb176c400717553bb27320b985fe8303540e67fc4c4609d9d
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 e20705ae0cc57dd5aa3770d4c4c382e140a4470156ae421e01458576f7807833
MD5 11855dd060f6e6a92ecb25a33949518b
SHA1 510385c3567ce63cff4d0c4148e3081dbcb33eed
SHA512 f0a2cf45a12ec19ae438f633aee26e5034d048efe7f1381049a1998e244c54f4b8d6a8181a8341441b66b2b549cface8d870f6531c3f880f863dafd74d56c64b
MD5 SHA1 SHA512

Submit Download

455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe

Path C:\Users\Admin\AppData\Local\c6400751-7c7f-4529-b951-1ca0f2e2a61c\455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63.exe
Size 772KB
SHA256 455b5284c2043ba96cd88489bfea4e697384df4d6c137aaefbf68385f2762a63
MD5 f48c70c5e5646426429b9f5d4677c7f6
SHA1 87a9c77f229116ba62b0847f5287e8b12bd535d2
SHA512 404fea329b8ce254bdd85ca21a8954bc7e61cd52913d368318987e972f5bbce1104e2de5330e973b2f864929fa1998dd35d47c6cb72b2025e1bea75bcd671451
SSDEEP 24576:pBLi+Eu3y80ZrzxFgJAXi0vVhZCum1GuBak:pBL1N3ybrzbgJAX1vLE7G
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/428-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/428-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/940-24-0x0000000000400000-0x0000000001A8C000-memory.dmp

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memory/940-34-0x0000000000400000-0x0000000001A8C000-memory.dmp

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memory/2200-2-0x0000000003850000-0x000000000396B000-memory.dmp

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memory/2200-1-0x00000000037A0000-0x0000000003842000-memory.dmp

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memory/4520-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4520-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4520-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4520-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4520-19-0x0000000000400000-0x0000000000537000-memory.dmp

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