djvu | 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f

General

Target

50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
Size

708KB
MD5

c991e828e97d9e583ff042e5891d9999
SHA1

12b6ab69ee99c0c5cb5b4f413f24e84d438b2d96
SHA256

50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f
SHA512

f65fcd02981c1a4eea592486ccb6b592fe646dbac48b0104586bf06f96a65124916c9f456ac588411b2b9dc434ede958977cdf47550e957623a1e1c6960573fb
SSDEEP

12288:tnsGKEfpDplHlPCBMPmpE0NuaAidBVlB+Nze9qXX0S6CjXf23:tsxYpDp9ZCBMI/uaAOug9OfXf4

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2568-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2568-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4792-2-0x00000000041C0000-0x00000000042DB000-memory.dmp	family_djvu
behavioral2/memory/2568-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2568-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2568-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1988-37-0x0000000000400000-0x0000000000537000-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

560 icacls.exe

pid	process
560	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3001105534-2705918504-2956618779-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1c8c33e4-53f2-42f1-8733-f5e7b4f3aedd\\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe\" --AutoStart"	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.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

5 api.2ip.ua
1 api.2ip.ua
2 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

description	pid	process	target process
PID 4792 set thread context of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 set thread context of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.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:

50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

pid	process
2568	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
2568	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
1988	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
1988	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
"C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4792

C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
"C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2568

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\1c8c33e4-53f2-42f1-8733-f5e7b4f3aedd" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:560

C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
"C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4104

C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
"C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
1KB

MD5
df80f9ba75076db634761b6132e0d4e3

SHA1
07983946fb660752c7cccb2ef82d01ec4c9ecc5d

SHA256
d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99

SHA512
4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a

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
e766943046fa85a9f796b40758fb3048

SHA1
fdc3f2d07868eb0d7040e51a2c9329b6cc2e8806

SHA256
b717a6228132036d603f0bc44ca58ee5ca75cbcea70a463276d66b2cbc6efde9

SHA512
90d6c0ed04cc8eb760ce5d33cb5c216c33a4591a9ac1ed246bc3440de910bc82efbdb821e36b4773aa68dad00267678adfaeb59eccc2a7348969bc53363b7f3d

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

Filesize
392B

MD5
a599b9a761d5d563808dce386a2f6903

SHA1
b5d3af2cc8e4e4ba3a1b25a5be2fad28094f6240

SHA256
185c4c34903f8cc62dd06eafaf92706e448d003888542ad5eb4215f79af1be59

SHA512
1df03010e4920c8460675216f47caa9949ba184e70972223b0ba627c441c8088b10af8160fb2821bb6e2c57912931943d2769ce23857c739e73e3e689aff40da

Download Submit
C:\Users\Admin\AppData\Local\1c8c33e4-53f2-42f1-8733-f5e7b4f3aedd\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

Filesize
708KB

MD5
c991e828e97d9e583ff042e5891d9999

SHA1
12b6ab69ee99c0c5cb5b4f413f24e84d438b2d96

SHA256
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f

SHA512
f65fcd02981c1a4eea592486ccb6b592fe646dbac48b0104586bf06f96a65124916c9f456ac588411b2b9dc434ede958977cdf47550e957623a1e1c6960573fb

Download Submit
memory/1988-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1988-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2568-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2568-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2568-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2568-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2568-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4792-1-0x00000000025C0000-0x0000000002655000-memory.dmp

Filesize
596KB

Download
memory/4792-2-0x00000000041C0000-0x00000000042DB000-memory.dmp

Filesize
1.1MB

Download

description	pid	process	target process
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4792 wrote to memory of 2568	4792	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 2568 wrote to memory of 560	2568	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	icacls.exe
PID 2568 wrote to memory of 560	2568	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	icacls.exe
PID 2568 wrote to memory of 560	2568	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	icacls.exe
PID 2568 wrote to memory of 4104	2568	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 2568 wrote to memory of 4104	2568	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 2568 wrote to memory of 4104	2568	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
PID 4104 wrote to memory of 1988	4104	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe	50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads