djvu | af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3

General

Target

af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
Size

715KB
MD5

5635413e69bd5c69358093e7684af7f7
SHA1

4588689ea0a3cb2e8e6e224db199929bdc0360a1
SHA256

af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3
SHA512

d4b0f3637ecc0015bcbffc542c45d697f4e79ce43bc8a7e580b6a9e2bdaa3adbb874f020e9a788eb02c3188de4bc56b52b3da7cbbf35da966315508fa1780afa
SSDEEP

12288:0xm7X63weKGyqaPNoKybbKxHR1Mdm3gel1BWIuM+n0OZf/DTJIqTEy:0xTXyqe2KSE1c6gel1luM+1dv/Ey

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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/784-4-0x0000000004B20000-0x0000000004C3B000-memory.dmp	family_djvu
behavioral2/memory/3124-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3124-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3124-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3124-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3124-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3512-37-0x0000000000400000-0x0000000000537000-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

3800 icacls.exe

pid	process
3800	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2dad02fa-67e4-48ad-9a31-9745e16df4b9\\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe\" --AutoStart"	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.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:

af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exeaf3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe

description	pid	process	target process
PID 784 set thread context of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 set thread context of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.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:

af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exeaf3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe

pid	process
3124	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
3124	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
3512	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
3512	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exeaf3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exeaf3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe

C:\Users\Admin\AppData\Local\Temp\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
"C:\Users\Admin\AppData\Local\Temp\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:784

C:\Users\Admin\AppData\Local\Temp\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
"C:\Users\Admin\AppData\Local\Temp\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3124

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\2dad02fa-67e4-48ad-9a31-9745e16df4b9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:3800

C:\Users\Admin\AppData\Local\Temp\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
"C:\Users\Admin\AppData\Local\Temp\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1376

C:\Users\Admin\AppData\Local\Temp\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
"C:\Users\Admin\AppData\Local\Temp\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3512

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

MD5
3bfb237d95f9c34465d50360f39b3ceb

SHA1
2cdee845ea6ebbd3cd0466b0eae4752842de86cc

SHA256
2ceaddb29268e6112e7aa95722894fb061238ad4e2b247ce23595609daa5eb8d

SHA512
da55bf0fd898acda5dfd2366a96d439807e502c763dca35c3a119c3ab45f6e3d821a1e3fd29858e333606ef0e822f3373b9cb8c41d95736131bb001ad5b6a16f

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
3571d47f98283f43fe8f2004ba26d583

SHA1
2fded852c7b3e6db0913a7fdee5e7e8b817ca37e

SHA256
48bc3be2f1f5154c3da0eccacd3e87940264a92d1f3c5da15c79821927bb03f4

SHA512
c5301ea83e82bd72a9f7e9270c40f5c4c5fd15f7df4cdbb1e4d04aef97101be1d89f16af07a240718a0a3e859e0351b08fb82bfee563c3b0493ff4b3b02854f8

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

MD5
59acaa29dcfcc418f2fa39350e802e24

SHA1
4647efe97e766387ab2279f48f0a7877af411e26

SHA256
9faf9d57681b8066c4aa50b4cc40bb9df88bc223eb94f24ca63efe21adc03469

SHA512
d5a26dc761b2a64ce8a3fd1054de2f3c2f94549ee6db0410255cea9f8694b6c2cf126cd54364c96931e6f69e9451cfb72a8d48f31672eea3f585961ae7e6cf14

Download Submit
C:\Users\Admin\AppData\Local\2dad02fa-67e4-48ad-9a31-9745e16df4b9\af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
Filesize
715KB

MD5
5635413e69bd5c69358093e7684af7f7

SHA1
4588689ea0a3cb2e8e6e224db199929bdc0360a1

SHA256
af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3

SHA512
d4b0f3637ecc0015bcbffc542c45d697f4e79ce43bc8a7e580b6a9e2bdaa3adbb874f020e9a788eb02c3188de4bc56b52b3da7cbbf35da966315508fa1780afa

Download Submit
memory/784-4-0x0000000004B20000-0x0000000004C3B000-memory.dmp

Filesize
1.1MB

Download
memory/784-1-0x0000000004A80000-0x0000000004B19000-memory.dmp

Filesize
612KB

Download
memory/3124-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3124-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3124-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3124-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3124-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3512-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 784 wrote to memory of 3124	784	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 3124 wrote to memory of 3800	3124	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	icacls.exe
PID 3124 wrote to memory of 3800	3124	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	icacls.exe
PID 3124 wrote to memory of 3800	3124	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	icacls.exe
PID 3124 wrote to memory of 1376	3124	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 3124 wrote to memory of 1376	3124	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 3124 wrote to memory of 1376	3124	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe
PID 1376 wrote to memory of 3512	1376	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe	af3a9672348cd909efeccc18f690454542b9a92c3ee8a87cea7ee28aa924e7a3.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads