djvu | 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82

General

Target

4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
Size

710KB
MD5

fda708b84341e23d935dbbd3328d324b
SHA1

9ba9f633af7afe8b69f81c50beb2dda944938304
SHA256

4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82
SHA512

345d7bfaa645b4bdc91b69cf4f1d5a1c3cbc64cd48e3db1e2a90c6a7074893e6951e13623094fe12b79cd1dcd8d2ba7dfd83c76d31f61fe4c642520b254c6a56
SSDEEP

12288:6tKgwZikNmzG1pZawqSc8ZjbZb/Xoik/8crs9ETWiGsn4IcsksDHy:6tpCe4K8c8ZXZbQd/8cmETW19k

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/3144-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp	family_djvu
behavioral2/memory/2744-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2744-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2744-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2744-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2744-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2372-37-0x0000000000400000-0x0000000000537000-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

2796 icacls.exe

pid	process
2796	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f0d6b676-6b68-4c8a-9960-4d7a6e36e7ba\\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe\" --AutoStart"	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.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:

4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe

description	pid	process	target process
PID 3144 set thread context of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 set thread context of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.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:

4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe

pid	process
2744	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
2744	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
2372	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
2372	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe

C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3144

C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2744

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\f0d6b676-6b68-4c8a-9960-4d7a6e36e7ba" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2796

C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3036

C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2372

Network

MITRE ATT&CK Matrix ATT&CK v13

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

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

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

MD5
6728aea2631b86a76c237508d8ba9b55

SHA1
7a670f95cac088313f7558869162fe01c6dc0ec9

SHA256
e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b

SHA512
533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5

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
437b9eba01c7013bf33af0a881a5aa73

SHA1
8d793e3247528b9c428082ee1a590056c2c21895

SHA256
0a27cd4217dfc53df82625b39ca2bdacb071cef39cffba4a1eecc1f7dd82b52b

SHA512
05913c0f164087cbf68210228cbce85e24918144aee960b723065231ebdfcd3415ce46ceacefaa8c9d6b278984be84a4369fae6f03da8040293d6f5f3a4fa336

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

MD5
1cef8b4012142aecbe8f055f8152d4d5

SHA1
3fcb8b08b418d66aa57ec33a1a56f3af714bc2d1

SHA256
4af6371ef0c5f77e8ca4a679efdded68a3116d2c69c42873a3b23dab93793566

SHA512
ef7dba8abf59d24d4fbbd496ebbf564312758f7b25614bda42561a92f254517d10c5808340d12e40aab71084661f1782200f4185f64016db011b5538d98e72ec

Download Submit
C:\Users\Admin\AppData\Local\f0d6b676-6b68-4c8a-9960-4d7a6e36e7ba\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
Filesize
710KB

MD5
fda708b84341e23d935dbbd3328d324b

SHA1
9ba9f633af7afe8b69f81c50beb2dda944938304

SHA256
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82

SHA512
345d7bfaa645b4bdc91b69cf4f1d5a1c3cbc64cd48e3db1e2a90c6a7074893e6951e13623094fe12b79cd1dcd8d2ba7dfd83c76d31f61fe4c642520b254c6a56

Download Submit
memory/2372-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2372-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2744-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2744-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2744-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2744-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2744-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3144-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp

Filesize
1.1MB

Download
memory/3144-1-0x0000000004A20000-0x0000000004AC2000-memory.dmp

Filesize
648KB

Download

description	pid	process	target process
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3144 wrote to memory of 2744	3144	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 2744 wrote to memory of 2796	2744	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	icacls.exe
PID 2744 wrote to memory of 2796	2744	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	icacls.exe
PID 2744 wrote to memory of 2796	2744	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	icacls.exe
PID 2744 wrote to memory of 3036	2744	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 2744 wrote to memory of 3036	2744	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 2744 wrote to memory of 3036	2744	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
PID 3036 wrote to memory of 2372	3036	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe	4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads