djvu | 6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d

Analysis

max time kernel
79s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03-06-2024 00:00

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General

Target

6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
Size

1.1MB
MD5

10ae98958bf7c0ab1ea79c665b3c9178
SHA1

ecbbf43f2e6f66ca27f4a1279c9b482e2d0c261c
SHA256

6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d
SHA512

c3e0c8541a23a42fd3f63a609e5e253a0d72b5f1f775e838bfa3d3c941abfdc7ae1a22f90a7f63ec67e86fd12f80da9c08ae8b810abee0809c31dd24b6a7079b
SSDEEP

24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO8SWQHUq7:F0dwAYZt6C31WeTVRPOhS7Uq7

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 1 IoCs

Processes:

resource yara_rule

C:\Users\Admin\AppData\Local\ae0306af-2d8f-449b-88e4-f0f07e073ae0\6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe family_djvu
Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

resource	yara_rule
C:\Users\Admin\AppData\Local\ae0306af-2d8f-449b-88e4-f0f07e073ae0\6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe	family_djvu

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1908 icacls.exe

pid	process
1908	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ae0306af-2d8f-449b-88e4-f0f07e073ae0\\6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe\" --AutoStart"	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.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.

Processes:

flow ioc

3 api.2ip.ua
6 api.2ip.ua
15 api.2ip.ua
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
3	api.2ip.ua
6	api.2ip.ua
15	api.2ip.ua

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe

pid	process
1792	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
1792	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
1364	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
1364	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe

description	pid	process	target process
PID 1792 wrote to memory of 1908	1792	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe	icacls.exe
PID 1792 wrote to memory of 1908	1792	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe	icacls.exe
PID 1792 wrote to memory of 1908	1792	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe	icacls.exe
PID 1792 wrote to memory of 1364	1792	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
PID 1792 wrote to memory of 1364	1792	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
PID 1792 wrote to memory of 1364	1792	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe	6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe

C:\Users\Admin\AppData\Local\Temp\6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
"C:\Users\Admin\AppData\Local\Temp\6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1792

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\ae0306af-2d8f-449b-88e4-f0f07e073ae0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
2⤵
- Modifies file permissions
PID:1908

C:\Users\Admin\AppData\Local\Temp\6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
"C:\Users\Admin\AppData\Local\Temp\6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe" --Admin IsNotAutoStart IsNotTask
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:1364

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
a2302c3b16124e8211ed629a5e35728b

SHA1
bccf44bfea669fc7ad1d97a7cb32ac8152917f61

SHA256
f108902accacd3de7d1e3ab0e9dff6997ab3c2e6aa0b3c63faf4ecb5fcf36b37

SHA512
1b551561dcb85b9b7e40cd0ea7537c602efc6bd3cd4eb3b86bee44177869c0bb11565aac5ee33cdb5dae90bf6fa32cee8b2edcfec878a76fe7734ef9930df9fc

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
410B

MD5
76926e6a4b2e5ec69da592e62c8f092d

SHA1
6e7d081a7a7a6f31f383dab96d0555f864ebc559

SHA256
468d888f9cf333fd811c2cf763204870d3a38824698d3b686c6701338a3637e2

SHA512
22de6f8b0437acc148211a6830465ceda14e39a3a0946feea33a93aba5c22804a29cefa6a64a852b14febf4ae234f5938c0e1ccd704388b22ef2181fd09949f7

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
dbce50adc5bd99bed355dbb665ef72a6

SHA1
0a73ab1183f1c0db9afd501d8ab568ab09797995

SHA256
960b9f1577f3c8a800312996f50e51072926b5e2970f36c7ac3c0dc6771ca18b

SHA512
358088069d7c28b428097a5eb499ed286bd5352b2b82da4e40480fe2d03de0497a9e02084248f929fa16287b2245b3e5036c5e8984547bc10a8d4b017e1bea45

Download Submit
C:\Users\Admin\AppData\Local\ae0306af-2d8f-449b-88e4-f0f07e073ae0\6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d.exe
Filesize
1.1MB

MD5
10ae98958bf7c0ab1ea79c665b3c9178

SHA1
ecbbf43f2e6f66ca27f4a1279c9b482e2d0c261c

SHA256
6d856705550fc2c2a38b80939b15631ca97c2037faeb03cab173e70e5b672e9d

SHA512
c3e0c8541a23a42fd3f63a609e5e253a0d72b5f1f775e838bfa3d3c941abfdc7ae1a22f90a7f63ec67e86fd12f80da9c08ae8b810abee0809c31dd24b6a7079b

Download Submit