djvu | 5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236

General

Target

5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
Size

733KB
MD5

a230bc33c976e62f89be6738a114cba5
SHA1

3518ac087264deb96cce6227388df0e646261f41
SHA256

5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236
SHA512

1aa036717884f4ae84ad4c76e8d6c5853d5c49658f032d82922e0b151a9f30febc9051ba65f48bb64cceb6299039243be437b7ccff2b22c24d1d0814f61d17dc
SSDEEP

12288:gPZRU01GBVNXYtiOAbaKK/zi6OouFam/UxjwaSU0yR2K6CXYXviVgmaa:gPk4GBVNnOAWpOou3AXr6C06emn

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/4596-2-0x0000000004B30000-0x0000000004C4B000-memory.dmp	family_djvu
behavioral2/memory/4708-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4708-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4708-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4708-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4708-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2932-37-0x0000000000400000-0x0000000000537000-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

3080 icacls.exe

pid	process
3080	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.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\\a6a044eb-7dcc-4e0f-9c3b-ef96569e55b3\\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe\" --AutoStart"	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.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

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

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe

description	pid	process	target process
PID 4596 set thread context of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 set thread context of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.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:

5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe

pid	process
4708	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
4708	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
2932	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
2932	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe

C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
"C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4596

C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
"C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4708

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\a6a044eb-7dcc-4e0f-9c3b-ef96569e55b3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:3080

C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
"C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3216

C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
"C:\Users\Admin\AppData\Local\Temp\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2932

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

Replay Monitor

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Downloads

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

MD5
8df6dedd4dd10eb8211463f82b129e29

SHA1
ffc6e51cf829b481d789d8e3e61f6c7096fbde3e

SHA256
a8400cc21263f2c44ccb301a3a1ef66a1ff009fd4d301362fd778e7b23a386d8

SHA512
25fd6d8684ff8db3d40a8fe33267fd01d6456a84f81c7e579f7508c36558cf731a0ec8a2999a539aa5c1985dc45f7bd20d2a14a343b2326030941858f24c57f4

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
462b87dd21dc0b1b87db03a88dcada10

SHA1
e103c6e5809209ed6b37ce3973ac200496fbc03f

SHA256
a7ee37c6f5e6a0c9ed34e3b5211a52e7573c47d4dc010042644ae4776f2d4568

SHA512
7515966164b8524f8c8b7112d3e1cef9b64cb63890479b669fa11835ad14eac122c90bb3949a14ba714178dd6c622a867ff6435dc85afeea7ba1ca87abf90dd5

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

MD5
d9e03109064c371b7f670b2580968243

SHA1
d8605140f326da4e0189956736bbbb1186ccf15d

SHA256
86a1d0003231cb85120a6999e9a10d4b4dcd429f24019b2d7346280db9a4e326

SHA512
b64109876adf4ca821cc8b08913364cfce8123eaa1f274dbca93e9b4b7d50e269ae522dc737dcad993d2717c2f15deb89bd66b38e8beeeb627848576cca614a7

Download Submit
C:\Users\Admin\AppData\Local\a6a044eb-7dcc-4e0f-9c3b-ef96569e55b3\5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
Filesize
733KB

MD5
a230bc33c976e62f89be6738a114cba5

SHA1
3518ac087264deb96cce6227388df0e646261f41

SHA256
5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236

SHA512
1aa036717884f4ae84ad4c76e8d6c5853d5c49658f032d82922e0b151a9f30febc9051ba65f48bb64cceb6299039243be437b7ccff2b22c24d1d0814f61d17dc

Download Submit
memory/2932-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2932-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4596-1-0x0000000004A90000-0x0000000004B24000-memory.dmp

Filesize
592KB

Download
memory/4596-2-0x0000000004B30000-0x0000000004C4B000-memory.dmp

Filesize
1.1MB

Download
memory/4708-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4708-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4708-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4708-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4708-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4596 wrote to memory of 4708	4596	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4708 wrote to memory of 3080	4708	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	icacls.exe
PID 4708 wrote to memory of 3080	4708	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	icacls.exe
PID 4708 wrote to memory of 3080	4708	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	icacls.exe
PID 4708 wrote to memory of 3216	4708	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4708 wrote to memory of 3216	4708	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 4708 wrote to memory of 3216	4708	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe
PID 3216 wrote to memory of 2932	3216	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe	5aff6e9d206328c4a7522654270172879a42ba122128e25a5283db1d3c426236.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads