djvu | ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174

Analysis

max time kernel
143s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
30-05-2024 01:41

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General

Target

ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
Size

790KB
MD5

2c04422f721343cd55a6b943c3622399
SHA1

eee1feae413760cf94818055c2493bb96fdfebb7
SHA256

ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174
SHA512

964eb9e8f432cec0aa4f9dfc73442be447fb299c33ec09a28179ad2d213b31599745d14a6b31bf36eff647016cad807cb7cc3bf5f5c74a660c8399500a51f9dc
SSDEEP

12288:8/i4YSF93r12vFDaSgiI2je6lSXx+mh1L6VVxgaYZwtAK13zc6ti2SSCI:KYSF9b12vHfX66A/rGVVxgbiBFiH

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4052-2-0x0000000003DE0000-0x0000000003EFB000-memory.dmp	family_djvu
behavioral2/memory/396-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/396-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/396-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/396-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/396-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-37-0x0000000000400000-0x0000000000537000-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

Processes:

icacls.exe

pid process

132 icacls.exe

pid	process
132	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1696768468-2170909707-4198977321-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\cd0cc95b-7cd6-47eb-9437-4af888764a96\\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe\" --AutoStart"	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.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

6 api.2ip.ua
1 api.2ip.ua
2 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exeec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe

description	pid	process	target process
PID 4052 set thread context of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 set thread context of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exeec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe

pid	process
396	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
396	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
4928	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
4928	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exeec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exeec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe

C:\Users\Admin\AppData\Local\Temp\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
"C:\Users\Admin\AppData\Local\Temp\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4052

C:\Users\Admin\AppData\Local\Temp\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
"C:\Users\Admin\AppData\Local\Temp\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:396

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\cd0cc95b-7cd6-47eb-9437-4af888764a96" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:132

C:\Users\Admin\AppData\Local\Temp\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
"C:\Users\Admin\AppData\Local\Temp\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3692

C:\Users\Admin\AppData\Local\Temp\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
"C:\Users\Admin\AppData\Local\Temp\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4928

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
6b5dad23fd7edd2c9daf944abc5d5341

SHA1
63a720a1bd0d9e2ecf288f11529f00256970577d

SHA256
e398b27255350eb1740b6851d4ca1faabc2b8c5ddd8caa791a47fc15af730060

SHA512
870f71e1f8724c984d51600080c43562303263c5ae4b9bf648fcf28909a88141a00db0e88b5ec52fc938c81ba78cb31a92a60792ff74b2369fdf10932d7e540c

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
867cae81a7af4eb238b60afb9c818636

SHA1
6808db279e95f740e3d4044dbdaec73665faefb4

SHA256
42199ff20e36eb390de2058baec94ec297910ae39f061e8f181a4b6358ad2f14

SHA512
c7255bf1718ef8b689d6875c9c9fec80b93ae98794964e0392e18978b6856528f22fb7f8ab01703b3e62b278b810bd4810e94f56b92172f20dd745259a175387

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

MD5
b9534d6ca47ec5d3dda5408511d18423

SHA1
42be67f73ce1c9b4c699f019047c962cecb941fd

SHA256
243cc3f22c1b622c52eb477d6e4d1192dc0353ec331c6d3213407b08e8598d71

SHA512
884648ca7fd4d4638a53846e76a05852f7f97532d2570da19fa9e56c1f390384c203926539cd4c1417ba9e60a5e1ee39599a594defd411a2b48271fa6b520cba

Download Submit
C:\Users\Admin\AppData\Local\cd0cc95b-7cd6-47eb-9437-4af888764a96\ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
Filesize
790KB

MD5
2c04422f721343cd55a6b943c3622399

SHA1
eee1feae413760cf94818055c2493bb96fdfebb7

SHA256
ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174

SHA512
964eb9e8f432cec0aa4f9dfc73442be447fb299c33ec09a28179ad2d213b31599745d14a6b31bf36eff647016cad807cb7cc3bf5f5c74a660c8399500a51f9dc

Download Submit
memory/396-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/396-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/396-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/396-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/396-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4052-2-0x0000000003DE0000-0x0000000003EFB000-memory.dmp

Filesize
1.1MB

Download
memory/4052-1-0x0000000002200000-0x000000000229C000-memory.dmp

Filesize
624KB

Download
memory/4928-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4928-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4928-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4928-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4928-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4928-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4928-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4928-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4928-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 4052 wrote to memory of 396	4052	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 396 wrote to memory of 132	396	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	icacls.exe
PID 396 wrote to memory of 132	396	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	icacls.exe
PID 396 wrote to memory of 132	396	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	icacls.exe
PID 396 wrote to memory of 3692	396	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 396 wrote to memory of 3692	396	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 396 wrote to memory of 3692	396	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe
PID 3692 wrote to memory of 4928	3692	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe	ec2f912293222d95306ffcd7d7c638fef31efe7b866a12621c397b0821e4a174.exe