djvu | dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9

General

Target

dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
Size

706KB
MD5

f189a7f7bd2b3dab6f298b60f67d7d92
SHA1

77e177549084be6e8a32a2e8962ffd3dd17466cc
SHA256

dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9
SHA512

3018f5ec889067ae011dc6aa7e1455998b5f78c38f86d7c02695fdfad7b8e13feb777c16c5cbf9c9abf05b0aa2dba8bcb9f6c0d09cefeb92e4cf1bf4702a77a1
SSDEEP

12288:QOGtnuVI9ZNMcuhGf5cZ9BqMPi8VUq5hBEFS57Eg3dZwWGvbnIxH:QyVIrNMcyGf5cfwMPi02FiL3d7GK

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://fresherlights.com/test1/get.php

Attributes

extension
.tcvp
offline_id
JBPpFMvWlKMsKlJRmPJl5e09RSnYrRJya1oX8xt1
payload_url
http://uaery.top/dl/build2.exe

http://fresherlights.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. You can get and look video overview decrypt tool: https://we.tl/t-bpYXr2m3kI Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0604Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1724-133-0x0000000002570000-0x000000000268B000-memory.dmp	family_djvu
behavioral1/memory/3648-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3648-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3648-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3648-139-0x0000000000400000-0x0000000000537000-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

3968 icacls.exe

pid	process
3968	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\45c5fa6f-2cfa-4531-8fdd-b4fa4a9442e2\\dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe\" --AutoStart"	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe

Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

52 api.2ip.ua
51 api.2ip.ua

flow	ioc
52	api.2ip.ua
51	api.2ip.ua

Suspicious use of SetThreadContext 1 IoCs

Processes:

dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe

description	pid	process	target process
PID 1724 set thread context of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe

pid	process
3648	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
3648	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exedadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe

description	pid	process	target process
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 1724 wrote to memory of 3648	1724	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
PID 3648 wrote to memory of 3968	3648	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	icacls.exe
PID 3648 wrote to memory of 3968	3648	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	icacls.exe
PID 3648 wrote to memory of 3968	3648	dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe	icacls.exe

C:\Users\Admin\AppData\Local\Temp\dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
"C:\Users\Admin\AppData\Local\Temp\dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1724

C:\Users\Admin\AppData\Local\Temp\dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe
"C:\Users\Admin\AppData\Local\Temp\dadca4f4efb4ac4b7ef27213e8e3707d5ddc38cde4bbb592b800aefc850f97e9.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3648

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\45c5fa6f-2cfa-4531-8fdd-b4fa4a9442e2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:3968

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1724-132-0x00000000024D0000-0x0000000002562000-memory.dmp

Filesize
584KB

Download
memory/1724-133-0x0000000002570000-0x000000000268B000-memory.dmp

Filesize
1.1MB

Download
memory/1724-134-0x00000000024D0000-0x0000000002562000-memory.dmp

Filesize
584KB

Download
memory/3648-135-0x0000000000000000-mapping.dmp

Download
memory/3648-136-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3648-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3648-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3648-139-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3968-140-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads