djvu | c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18

General

Target

c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Size

716KB
MD5

2a02c81a9994f011090e174bb076ec9b
SHA1

50cf1a96d5e2945143b6fb3484b124d41349c77c
SHA256

c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
SHA512

d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
SSDEEP

12288:0k0wJoEANTCwX67nsbdxnZF2+9R32y1Cbd8n34rtzjg1S0lWEKm:0kVCGwX6LsbS+9Uy1CxCwtQkeKm

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 13 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2760-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2760-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2760-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2760-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4652-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1480 icacls.exe

pid	process
1480	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f29773b5-14f2-4ec1-b089-f0e3048e6691\\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe\" --AutoStart"	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.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

2 api.2ip.ua
4 api.2ip.ua
13 api.2ip.ua

flow	ioc
2	api.2ip.ua
4	api.2ip.ua
13	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

description	pid	process	target process
PID 1908 set thread context of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 set thread context of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.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:

c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

pid	process
2760	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
2760	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
4652	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
4652	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1908

C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2760

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\f29773b5-14f2-4ec1-b089-f0e3048e6691" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1480

C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:516

C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4652

Network

MITRE ATT&CK Matrix ATT&CK v13

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

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

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

MD5
7bb5a14437331aad24915a3d8546fbc1

SHA1
9a5570c07af0c0cde02858f61e1c7094f5a70f38

SHA256
42397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00

SHA512
a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13

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
51bb99c5d79f94f6a664fdd8b5f9a187

SHA1
7b23e0813800d441ef750f982535cabcf20bb7af

SHA256
5a2e71c440c25ce227093b0ef3de54f24b2a08492c29fcf461ec18c405292629

SHA512
07cdc47321bc9b988c7ea5110c3dc088f2e2b11f86075f92ddf3a9f27eabf43d96f90f62920c5b838ccee7009fae49aa358baab81aa13ffb0250c396822b3795

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

MD5
43220b2bb00d0e6accdbbf8fc8e2f85a

SHA1
f3772bea94cdcfb9558cb1efd5d073760c1eda9f

SHA256
4f808830395615818b77d89a9cf9fe965eb7bb0dabb98f07db2f815c7301d5aa

SHA512
30f2e8d671996b4c7b596d639c5dcb91a5742b1f770811c8ec6fcdb32dd04d599451115dc0b928a42d6ffc392a6cadb4f3f6ba51c9f777d0281194615be820c3

Download Submit
C:\Users\Admin\AppData\Local\f29773b5-14f2-4ec1-b089-f0e3048e6691\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Filesize
716KB

MD5
2a02c81a9994f011090e174bb076ec9b

SHA1
50cf1a96d5e2945143b6fb3484b124d41349c77c

SHA256
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18

SHA512
d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a

Download Submit
memory/1908-1-0x00007FFC92910000-0x00007FFC92B05000-memory.dmp

Filesize
2.0MB

Download
memory/2760-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2760-18-0x00007FFC92910000-0x00007FFC92B05000-memory.dmp

Filesize
2.0MB

Download
memory/2760-16-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2760-5-0x00007FFC92910000-0x00007FFC92B05000-memory.dmp

Filesize
2.0MB

Download
memory/2760-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2760-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4652-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 1908 wrote to memory of 2760	1908	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 2760 wrote to memory of 1480	2760	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	icacls.exe
PID 2760 wrote to memory of 1480	2760	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	icacls.exe
PID 2760 wrote to memory of 1480	2760	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	icacls.exe
PID 2760 wrote to memory of 516	2760	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 2760 wrote to memory of 516	2760	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 2760 wrote to memory of 516	2760	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
PID 516 wrote to memory of 4652	516	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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