djvu | 36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da

Analysis

max time kernel
294s
max time network
291s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
30-05-2024 22:46

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General

Target

36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
Size

716KB
MD5

3fec00cd2622f19d07c00b24c7ac42a7
SHA1

d4d8f501be350fa1081d234445b44b8bc1b86068
SHA256

36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da
SHA512

6b65b10e14964c461b16c0781480de3a98a6852d73ceadcb5ff06f15ba1e280972b600f7d542c3a10757ffe8b6cc60c3727c7d864dc4bd5974bd50bfc3b158aa
SSDEEP

12288:eNpnKUvp7NVkfBhTsQMwEfg55FRM2bdzh9TQw4nL2HT1ndq3:eNp9NVSTRMwEa5xbJD4n64

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/5072-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2272-4-0x0000000004A10000-0x0000000004B2B000-memory.dmp	family_djvu
behavioral2/memory/5072-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/872-43-0x0000000000400000-0x0000000000537000-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

4572 icacls.exe

pid	process
4572	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-160447019-1232603106-4168707212-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3a04137f-a21a-455f-8646-623351bf8338\\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe\" --AutoStart"	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.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
10 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe

description	pid	process	target process
PID 2272 set thread context of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 set thread context of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.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:

36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe

pid	process
5072	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
5072	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
872	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
872	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe

C:\Users\Admin\AppData\Local\Temp\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
"C:\Users\Admin\AppData\Local\Temp\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2272

C:\Users\Admin\AppData\Local\Temp\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
"C:\Users\Admin\AppData\Local\Temp\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5072

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\3a04137f-a21a-455f-8646-623351bf8338" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4572

C:\Users\Admin\AppData\Local\Temp\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
"C:\Users\Admin\AppData\Local\Temp\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2688

C:\Users\Admin\AppData\Local\Temp\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
"C:\Users\Admin\AppData\Local\Temp\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:872

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
03c0f8ee77d876972cda274ac80f5e52

SHA1
a42ee63d82fae2390b4a3ee55dcaea356bc4e0d3

SHA256
d10478a42647f37ccbe419912d8ce3d35ccb84b5e83d8fce98d0b9baad81ccfe

SHA512
9d4c9deb0185c342cb20c17503e459a460313fd599a58e3a0e34c5e202bd4e44cf67f96275291eee922c55407404e71822bd5ae9924808544c3461e4e0080faa

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
842b24cde0981ded7dfd36b7c229bd3e

SHA1
27d1c47dd7076ea4added8f3be3e06e2fe7b9847

SHA256
5513c6bb0dc48fd1ae43398b105e390aed3cfcdc785766ccb6340f632267c8d2

SHA512
f8053a109d13e73c85ae0a3a05efbfe353c28b94eeaac1bbf9bdae9f9f3128769f809557cbf476c3de8239f14ce6d2a8b420860dca04f7cdff5a03d1b95dcabe

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

MD5
21b2451f8d13dfb5e9b2b60d32bef133

SHA1
5606b1e5945cfaab3987d135755c07d2ef5120a3

SHA256
7f84a50cf365f35268397399a405dc8a258deec0077b4a7a9ba679423657e64e

SHA512
a8fc6a8c700093b1711c7fffd553f0b336d7dbee55bdd7525fd7517c9b798431568f59999a2d9f0d2e40cdd9b637eba4728c26224aaaf891310c8ba649c20aa3

Download Submit
C:\Users\Admin\AppData\Local\3a04137f-a21a-455f-8646-623351bf8338\36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
Filesize
716KB

MD5
3fec00cd2622f19d07c00b24c7ac42a7

SHA1
d4d8f501be350fa1081d234445b44b8bc1b86068

SHA256
36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da

SHA512
6b65b10e14964c461b16c0781480de3a98a6852d73ceadcb5ff06f15ba1e280972b600f7d542c3a10757ffe8b6cc60c3727c7d864dc4bd5974bd50bfc3b158aa

Download Submit
memory/872-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/872-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/872-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/872-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/872-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/872-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/872-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/872-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/872-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2272-4-0x0000000004A10000-0x0000000004B2B000-memory.dmp

Filesize
1.1MB

Download
memory/2272-2-0x0000000002DE0000-0x0000000002E76000-memory.dmp

Filesize
600KB

Download
memory/5072-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5072-1-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5072-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5072-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5072-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2272 wrote to memory of 5072	2272	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 5072 wrote to memory of 4572	5072	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	icacls.exe
PID 5072 wrote to memory of 4572	5072	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	icacls.exe
PID 5072 wrote to memory of 4572	5072	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	icacls.exe
PID 5072 wrote to memory of 2688	5072	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 5072 wrote to memory of 2688	5072	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 5072 wrote to memory of 2688	5072	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe
PID 2688 wrote to memory of 872	2688	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe	36ea1781b0953c41e737361149b81759dd934fca315dc14554a2b0fa665e88da.exe