djvu | 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1

Analysis

max time kernel
295s
max time network
286s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
24-06-2024 05:28

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General

Target

75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
Size

723KB
MD5

7d80b0edbef2905f9b7e16495634fb84
SHA1

d890893f51a0fefd83bad32fd002d91bccf2bd5f
SHA256

75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1
SHA512

ab2f98b5b2823095be19c0a5c8fdbe435f1964dab1cef02e2285ae13ffdeda6578a75668142934479551bd2b8de6ea831e7c559c14c568caa113f404a740c969
SSDEEP

12288:USic4OFvNWF8IiYuEa6DG2P56vyGL3wavO0SYn0d3hP2JodZa1TMnplQWWe0N3:UglWF8IQP6DG2P5WNi0SYnCRuJaZ6WWZ

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
payload_url
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/abe121434ad837dd5bdd03878a14485820240531135509/34284d 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: 0874PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4892-2-0x0000000002290000-0x00000000023AB000-memory.dmp	family_djvu
behavioral2/memory/1632-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1632-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1632-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1632-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1632-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4120-45-0x0000000000400000-0x0000000000537000-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

4664 icacls.exe

pid	process
4664	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\27ab86f6-d4c2-4da8-adf8-e266cc198b56\\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe\" --AutoStart"	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.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

10 api.2ip.ua
1 api.2ip.ua
2 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe

description	pid	process	target process
PID 4892 set thread context of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 set thread context of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.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:

75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe

pid	process
1632	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
1632	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
4120	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
4120	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe

C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
"C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4892

C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
"C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1632

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\27ab86f6-d4c2-4da8-adf8-e266cc198b56" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4664

C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
"C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:8

C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
"C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4120

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Filesize
1KB

MD5
2365869258df7a66a2121b802ca4afd9

SHA1
73acc30a2edeb9d6830de559bb8a74f35168135d

SHA256
d6b1932822bbd72a8e78c771717d992142348f67d625a42393719fefbe59b0ed

SHA512
795004bab536e128dbd81c188976d37c7b650efbfa5a80374df4c65a1049c27658f4620b7605583928eb167fcb69b4c99e4c8730c507b824a7bde9c7fb0e21f4

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Filesize
436B

MD5
1bfe0a81db078ea084ff82fe545176fe

SHA1
50b116f578bd272922fa8eae94f7b02fd3b88384

SHA256
5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f

SHA512
37c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Filesize
174B

MD5
f1850a709b3ed1061ae6b30d248a1ed2

SHA1
b98e9cb9b36b6a00e97a87eb3cda420ac1ac5f1c

SHA256
d8e9b67d52aa36784e119a76ef0fc59eff866d652e62c8753738fb68b0c66bef

SHA512
da783fd11ff6138c108c90e46d5f372a0e3708b08f0d63d796e82283285476f638b39dd819a854ac8e95145b6defbe05675600c018065041ca4171f473eb025f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Filesize
170B

MD5
846533e250cb5d4b5cd8417d1ba12d20

SHA1
72d3181cd3cd722890d8d4aa9839f05a0894fbb8

SHA256
c525a33ea1a57e8799343b518fd8d41cc72c52d822ab162f1dfed9f1425e9399

SHA512
5a1d8f000424b42a44c2a2ca0cc815cf3c6567002b9cca76be4eeef80d629f029e8135ff906592ab88b8f7e3bc6a2a3e6caf5e91e24794de89114c4a2bfffb26

Download Submit
C:\Users\Admin\AppData\Local\27ab86f6-d4c2-4da8-adf8-e266cc198b56\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
Filesize
723KB

MD5
7d80b0edbef2905f9b7e16495634fb84

SHA1
d890893f51a0fefd83bad32fd002d91bccf2bd5f

SHA256
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1

SHA512
ab2f98b5b2823095be19c0a5c8fdbe435f1964dab1cef02e2285ae13ffdeda6578a75668142934479551bd2b8de6ea831e7c559c14c568caa113f404a740c969

Download Submit
memory/8-26-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download
memory/8-24-0x0000000000400000-0x00000000004BF000-memory.dmp

Filesize
764KB

Download
memory/1632-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1632-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1632-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1632-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1632-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4120-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4892-1-0x00000000020E0000-0x000000000217A000-memory.dmp

Filesize
616KB

Download
memory/4892-2-0x0000000002290000-0x00000000023AB000-memory.dmp

Filesize
1.1MB

Download

description	pid	process	target process
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 4892 wrote to memory of 1632	4892	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 1632 wrote to memory of 4664	1632	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	icacls.exe
PID 1632 wrote to memory of 4664	1632	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	icacls.exe
PID 1632 wrote to memory of 4664	1632	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	icacls.exe
PID 1632 wrote to memory of 8	1632	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 1632 wrote to memory of 8	1632	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 1632 wrote to memory of 8	1632	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
PID 8 wrote to memory of 4120	8	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe	75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe