djvu | 6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8

General

Target

6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
Size

807KB
MD5

f4b38701cac3b466ac2c5a99ab8c6416
SHA1

262dedd611d88afe3f9119be37284f9474765fa2
SHA256

6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8
SHA512

d142b5191ff70914c156e026f1316d62745e4c91e9942681d6d76246a2a92aeacbb4f5fcf8b4abc6a9e3140871517a21fa440574e3b1a940aa78716b56ffcf81
SSDEEP

12288:uL7E6RIo6OLZO/4cZIafwpd17oZSj6N8tqbKmaV/+WDUBw8GOWDfOR/ZDUM:YGOmH+Bb9j2jWmXWDCwxOWDfOR

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
behavioral2/memory/5020-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5020-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5020-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5020-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/752-3-0x0000000003DF0000-0x0000000003F0B000-memory.dmp	family_djvu
behavioral2/memory/5020-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-37-0x0000000000400000-0x0000000000537000-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

4896 icacls.exe

pid	process
4896	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.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\\696b3d80-f924-4129-b621-419625cd6012\\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe\" --AutoStart"	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.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
6 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe

description	pid	process	target process
PID 752 set thread context of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 set thread context of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.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:

6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe

pid	process
5020	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
5020	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
964	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
964	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe

C:\Users\Admin\AppData\Local\Temp\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
"C:\Users\Admin\AppData\Local\Temp\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:752

C:\Users\Admin\AppData\Local\Temp\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
"C:\Users\Admin\AppData\Local\Temp\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5020

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\696b3d80-f924-4129-b621-419625cd6012" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4896

C:\Users\Admin\AppData\Local\Temp\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
"C:\Users\Admin\AppData\Local\Temp\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4480

C:\Users\Admin\AppData\Local\Temp\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
"C:\Users\Admin\AppData\Local\Temp\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:964

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

MD5
e4cacc9fa4adc8a6751aaf917c99e447

SHA1
d27c0b41d3fe6627c82ea3e6e762b1474f64ba51

SHA256
6ebb6b38a3cab01ca3d714f8df8b1d1dc0f159922fe9ae5e104dcd27c59eaf30

SHA512
fc104a463bf08270217f88841c8690dcb264abeebf8bd78dfda2dd2bd4fa85231dc7aede74e427483065ef3e6ef3f2c7e73c1c67dc274861da3421ea35927a80

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
fdd5512faa897f21309ee626823ecc70

SHA1
7f01d7ad69d376e1307ff907b6f57552e01abd1d

SHA256
e0af4f1d01f4bb355500585d5683e35daefcd8d8bf11483f3a8132a942bd359b

SHA512
d8f6b4a4ef4382938f3f87fd084f46260fb6c04792caff638247c6afedc914061c5981de047833a651e9ed083ebcdc1e19006ccb6046b0c0e5a6f6a71991d6b3

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

MD5
14c94dc58bce260534c31129f938e0b2

SHA1
8b65fb9f22462a247c35b41e0ab0aaf595dec993

SHA256
efa279a13112c606d6e3e5d563e052481e732c307b166b99f93c4d6c12c7a204

SHA512
5e0c39663ce3c63a94afee27b6846d14c02b006fb1804c0618333ca94a69ed379d180ab4c0452d1aa771a929f5b4c04b2c1e871d696ee769e2e38749d712b5c2

Download Submit
C:\Users\Admin\AppData\Local\696b3d80-f924-4129-b621-419625cd6012\6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
Filesize
807KB

MD5
f4b38701cac3b466ac2c5a99ab8c6416

SHA1
262dedd611d88afe3f9119be37284f9474765fa2

SHA256
6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8

SHA512
d142b5191ff70914c156e026f1316d62745e4c91e9942681d6d76246a2a92aeacbb4f5fcf8b4abc6a9e3140871517a21fa440574e3b1a940aa78716b56ffcf81

Download Submit
memory/752-1-0x00000000022F0000-0x0000000002388000-memory.dmp

Filesize
608KB

Download
memory/752-3-0x0000000003DF0000-0x0000000003F0B000-memory.dmp

Filesize
1.1MB

Download
memory/964-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/964-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/964-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/964-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/964-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/964-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/964-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/964-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/964-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5020-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5020-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5020-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5020-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5020-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 752 wrote to memory of 5020	752	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 5020 wrote to memory of 4896	5020	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	icacls.exe
PID 5020 wrote to memory of 4896	5020	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	icacls.exe
PID 5020 wrote to memory of 4896	5020	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	icacls.exe
PID 5020 wrote to memory of 4480	5020	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 5020 wrote to memory of 4480	5020	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 5020 wrote to memory of 4480	5020	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe
PID 4480 wrote to memory of 964	4480	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe	6614b336fb0740c40015b739e5510ebb114250b6cfc4017b9b2099530ebb94c8.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads