djvu | c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da

Analysis

max time kernel
143s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
29-05-2024 18:36

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General

Target

c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
Size

790KB
MD5

9516c60a3958bf4f643216eb2c031e7d
SHA1

6687f2a25da0ee696686715f8ad053fb7b05a5ca
SHA256

c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da
SHA512

cdfffc1ad4e587421929c1ada323518a5cc59104fc687e241dce30591cc8ed01883a99818ab08e230abfc2ba44b186c7de11d5bb6bd1a74c9fd7a9c668d080b6
SSDEEP

24576:1EADqd/c7CXPHC3WbJlyWL41WQmQAooO:1EAg/mCXs0IWQ4o

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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/4540-2-0x0000000003DE0000-0x0000000003EFB000-memory.dmp	family_djvu
behavioral2/memory/3140-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3140-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3140-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3140-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3140-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1160-37-0x0000000000400000-0x0000000000537000-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

4564 icacls.exe

pid	process
4564	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\44ad9fcc-7aeb-4d17-8ed0-7623416c5f79\\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe\" --AutoStart"	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.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
9 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exec2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe

description	pid	process	target process
PID 4540 set thread context of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 set thread context of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.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:

c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exec2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe

pid	process
3140	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
3140	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
1160	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
1160	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exec2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exec2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe

C:\Users\Admin\AppData\Local\Temp\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
"C:\Users\Admin\AppData\Local\Temp\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4540

C:\Users\Admin\AppData\Local\Temp\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
"C:\Users\Admin\AppData\Local\Temp\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3140

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\44ad9fcc-7aeb-4d17-8ed0-7623416c5f79" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4564

C:\Users\Admin\AppData\Local\Temp\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
"C:\Users\Admin\AppData\Local\Temp\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:692

C:\Users\Admin\AppData\Local\Temp\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
"C:\Users\Admin\AppData\Local\Temp\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1160

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

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

MD5
7accdd5ae68e7d4e5811a515b58f3e42

SHA1
a0dae23c3fb9029e0fb0c899a1d8b3c507fc3aad

SHA256
c419f082161c6938bfb7e7b721ffc2ce738fc24890e5044a370aa46b7f48c440

SHA512
7e7e5ed2422b74c230ff1c5f3e855fc8efe4d6788041641f0d5f53d8150c7f8a94314ec8d1c660d8fac714367a8f17d1eac209ffec669a94aee4b8ba7e352594

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
e5d9b674183e2baa343348ffa8d60e13

SHA1
9b6278bb25eb316190e08d3c4b6ebd6388017315

SHA256
88a2c7c21e346210e31b306e1cee740f4bd737c27201175b9831197f6e5993d4

SHA512
0440ca8b93f842b3dcec378d6c43bf9538298d533a8ecdce9bb4a64aaf4db2f8737b24cea769d2c3937a5c5694a1594b8a2148fe40f7a8f2dd470e0d0cbeaeb0

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

MD5
6ab381dca3f59d710939cfd15a1e1ef4

SHA1
5c88bd27ccfbd4b860bcda6495aac7c1201a097a

SHA256
08f668eded514617a88a50c1708eaa3495e8dc521f0bad904e9c98938d9bb841

SHA512
23d2a5ed04529f4e8ff4b851b85a91fdff1432692ad62fbc268c1b653ebe34071aa1fa023bf8ef9c99b428bcefbf113780e1473ae78ea86049efe028c7bfc410

Download Submit
C:\Users\Admin\AppData\Local\44ad9fcc-7aeb-4d17-8ed0-7623416c5f79\c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
Filesize
790KB

MD5
9516c60a3958bf4f643216eb2c031e7d

SHA1
6687f2a25da0ee696686715f8ad053fb7b05a5ca

SHA256
c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da

SHA512
cdfffc1ad4e587421929c1ada323518a5cc59104fc687e241dce30591cc8ed01883a99818ab08e230abfc2ba44b186c7de11d5bb6bd1a74c9fd7a9c668d080b6

Download Submit
memory/1160-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1160-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1160-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1160-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1160-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1160-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1160-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1160-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1160-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3140-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3140-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3140-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3140-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3140-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4540-1-0x0000000002320000-0x00000000023BD000-memory.dmp

Filesize
628KB

Download
memory/4540-2-0x0000000003DE0000-0x0000000003EFB000-memory.dmp

Filesize
1.1MB

Download

description	pid	process	target process
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 4540 wrote to memory of 3140	4540	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 3140 wrote to memory of 4564	3140	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	icacls.exe
PID 3140 wrote to memory of 4564	3140	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	icacls.exe
PID 3140 wrote to memory of 4564	3140	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	icacls.exe
PID 3140 wrote to memory of 692	3140	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 3140 wrote to memory of 692	3140	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 3140 wrote to memory of 692	3140	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe
PID 692 wrote to memory of 1160	692	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe	c2bda533699c1e9bc18035f426a69a3ae4c5f4ad2087553cc5f4b035356939da.exe