djvu | 3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6

General

Target

3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
Size

733KB
MD5

9998879b207a0fe12c5d5b607e67b270
SHA1

c8e535203f2f8661b526317a3b77ae36a23b2760
SHA256

3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6
SHA512

00586e0e69824eb328e4b3cf57a866b4d03ac2aed6b8bd4421c50864182ead7341d8a104bcfe2fe68b94ade421886346a1f4ed1c90be63b5dbca9580e6509849
SSDEEP

12288:eiDoXN0QJAHpQnXu/wlOX0Jsln6cWCNKJWddrr/zv5ODPeb4gsk8NIUIra:eO42KZOEJsln6H8r3v5ODeb1Wea

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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
behavioral1/memory/3128-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3128-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3128-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4936-4-0x0000000004A40000-0x0000000004B5B000-memory.dmp	family_djvu
behavioral1/memory/3128-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3128-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/60-35-0x0000000000400000-0x0000000000537000-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:

3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

2984 icacls.exe

pid	process
2984	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\91c15f41-da2c-4209-af9d-a188c25f0bc8\\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe\" --AutoStart"	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.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

7 api.2ip.ua
8 api.2ip.ua
19 api.2ip.ua

flow	ioc
7	api.2ip.ua
8	api.2ip.ua
19	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe

description	pid	process	target process
PID 4936 set thread context of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 set thread context of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.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:

3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe

pid	process
3128	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
3128	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
60	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
60	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe

C:\Users\Admin\AppData\Local\Temp\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
"C:\Users\Admin\AppData\Local\Temp\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4936

C:\Users\Admin\AppData\Local\Temp\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
"C:\Users\Admin\AppData\Local\Temp\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3128

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\91c15f41-da2c-4209-af9d-a188c25f0bc8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2984

C:\Users\Admin\AppData\Local\Temp\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
"C:\Users\Admin\AppData\Local\Temp\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2520

C:\Users\Admin\AppData\Local\Temp\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
"C:\Users\Admin\AppData\Local\Temp\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:60

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
dd3850d9ce5a33ba453ba4d1dfb4ba51

SHA1
df05b044dd14e7d009aad0398686bbfd6fff1491

SHA256
e9e041a83d7f3dbd6adfeda50b7ff9d3fd1abfcfb4fc5906d481c33db7072b85

SHA512
ec27ccc61d0133a76a612d5ddde2c6193f96302e17f66a75da8e1ad18ee871fe6b307e535317726449dc724331d4f48376d03201ad8d9dc2985aa0420d45b8e4

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
d928d17ee6908a7184949e42676e8ace

SHA1
6b16f9f73eae80a5645ddd630a9404d9a09a953e

SHA256
c90ca041282d86f494f885033205429dc23a293a01d2ced30ef5647c41a3ebcf

SHA512
235ecbcc71883c44a3c26c14377aad331689df03591cb1d5b1cdd746535052cc74019afdf1c2e395b9ef6981354c09bad6355d78a5cabca15782c886a0ff39ed

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

MD5
e8a99dcbd6738209fce7c7ae84963cf5

SHA1
cc227d144e6f31bf996a8ff2d9d0159d9fc835c9

SHA256
f328d7e41c77909f8fc2008445c811f5e055cf248e0dfbe7891870d175b48796

SHA512
95f525a57831352792a4ca2753ac00e41cb8958c0d6a08f2424a580b50d6cb2a7aed57c1f565ed3be40519bf190aafab5de81e0483e73c5fa0d84074e470b07f

Download Submit
C:\Users\Admin\AppData\Local\91c15f41-da2c-4209-af9d-a188c25f0bc8\3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
Filesize
733KB

MD5
9998879b207a0fe12c5d5b607e67b270

SHA1
c8e535203f2f8661b526317a3b77ae36a23b2760

SHA256
3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6

SHA512
00586e0e69824eb328e4b3cf57a866b4d03ac2aed6b8bd4421c50864182ead7341d8a104bcfe2fe68b94ade421886346a1f4ed1c90be63b5dbca9580e6509849

Download Submit
memory/60-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/60-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/60-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/60-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/60-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/60-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/60-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/60-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/60-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3128-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3128-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3128-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3128-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3128-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4936-4-0x0000000004A40000-0x0000000004B5B000-memory.dmp

Filesize
1.1MB

Download
memory/4936-1-0x00000000049A0000-0x0000000004A3A000-memory.dmp

Filesize
616KB

Download

description	pid	process	target process
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 4936 wrote to memory of 3128	4936	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 3128 wrote to memory of 2984	3128	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	icacls.exe
PID 3128 wrote to memory of 2984	3128	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	icacls.exe
PID 3128 wrote to memory of 2984	3128	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	icacls.exe
PID 3128 wrote to memory of 2520	3128	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 3128 wrote to memory of 2520	3128	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 3128 wrote to memory of 2520	3128	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe
PID 2520 wrote to memory of 60	2520	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe	3b8d4ba0e0a7d9b823d29e03c865e38de1213b2673b2c59b7114551b97c0bba6.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads