djvu | c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723

Analysis

max time kernel
148s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
25-06-2024 16:41

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General

Target

c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
Size

839KB
MD5

c9b393393e6203918dd762af9217695c
SHA1

7912a644cd0b922628d8bfd07be49cf6caed0cde
SHA256

c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723
SHA512

6bdfb614ae90e729fdace042b925653bbd32f66dff188e0ec14cbad58012d883188f7461e753415c5e027b5298d55a041f3521b720ca90e671e860f9520ad709
SSDEEP

12288:oFLV3SQMC2KjSnCs/urQO4VivUI6q9ulGvxnrgJMKut3KENjEhQEOuV:iSQaCsgUI6grzt3K4EWlu

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.waqa
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
payload_url
http://defgyma.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/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: 0875PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3164-2-0x0000000004600000-0x000000000471B000-memory.dmp	family_djvu
behavioral2/memory/2532-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2532-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2532-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2532-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2532-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4712-41-0x0000000000400000-0x0000000000537000-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

2252 icacls.exe

pid	process
2252	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3107365284-1576850094-161165143-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5cc7abf0-3249-414c-861e-849d6c313f1e\\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe\" --AutoStart"	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.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

1 api.2ip.ua
2 api.2ip.ua
8 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exec4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe

description	pid	process	target process
PID 3164 set thread context of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 set thread context of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.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:

c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exec4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe

pid	process
2532	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
2532	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
4712	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
4712	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exec4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exec4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe

C:\Users\Admin\AppData\Local\Temp\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
"C:\Users\Admin\AppData\Local\Temp\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3164

C:\Users\Admin\AppData\Local\Temp\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
"C:\Users\Admin\AppData\Local\Temp\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2532

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\5cc7abf0-3249-414c-861e-849d6c313f1e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2252

C:\Users\Admin\AppData\Local\Temp\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
"C:\Users\Admin\AppData\Local\Temp\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4228

C:\Users\Admin\AppData\Local\Temp\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
"C:\Users\Admin\AppData\Local\Temp\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4712

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
481443d9c6b45b0f274652ce164605c6

SHA1
5545129cd398ff7727fd256e1862431348e1d628

SHA256
9c5b631ee90c403df252c308812cef2f996967bf4dc2746f109024f2001e61fb

SHA512
976a183217e09a2492e6b1358fc0b93677a4504035485ac06164f381d2f2e1e0a7dd5549f458697114cc434999ea422ee1b555993125776542f5e0748e7a2ca7

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

MD5
9802546af28be3b30cb2186581968eb3

SHA1
7f41acc2b6d02871d4a42968cfd2282898f50c05

SHA256
fbf144b759dfc43fbabee3d4ca89febc57fb3cfbeb35c868f6089017ece32c3d

SHA512
83f9c6d71803849c890c0451315f27253516ce6b41696d7d4ca1f6d129792f28b1c5091b49fe0928b456c257a08da5ad5137fef94259519105b087cf4c3f57a7

Download Submit
C:\Users\Admin\AppData\Local\5cc7abf0-3249-414c-861e-849d6c313f1e\c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
Filesize
839KB

MD5
c9b393393e6203918dd762af9217695c

SHA1
7912a644cd0b922628d8bfd07be49cf6caed0cde

SHA256
c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723

SHA512
6bdfb614ae90e729fdace042b925653bbd32f66dff188e0ec14cbad58012d883188f7461e753415c5e027b5298d55a041f3521b720ca90e671e860f9520ad709

Download Submit
memory/2532-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2532-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2532-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2532-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2532-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3164-2-0x0000000004600000-0x000000000471B000-memory.dmp

Filesize
1.1MB

Download
memory/3164-1-0x0000000004560000-0x0000000004600000-memory.dmp

Filesize
640KB

Download
memory/4712-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 3164 wrote to memory of 2532	3164	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 2532 wrote to memory of 2252	2532	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	icacls.exe
PID 2532 wrote to memory of 2252	2532	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	icacls.exe
PID 2532 wrote to memory of 2252	2532	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	icacls.exe
PID 2532 wrote to memory of 4228	2532	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 2532 wrote to memory of 4228	2532	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 2532 wrote to memory of 4228	2532	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe
PID 4228 wrote to memory of 4712	4228	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe	c4635572e7564b96f4d14ad32a9c4844022f35b9de1a5bd3e3d392a974d05723.exe