djvu | c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b

General

Target

c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
Size

808KB
MD5

6ba3c656ce436b2523104b0bbb5b6b6d
SHA1

7d4ac2a53edc6fd9fc0a5c385bf9619e1395984b
SHA256

c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b
SHA512

64f68877117e476ecc3fbccc9760660e6a2c071f96dd150652c4a1019a86f42b8abe444b4219dcf03a27c7de68ee3d28cc3b06ef8b529cf1434c8feb0d554d4a
SSDEEP

12288:CLkpB0wrV3MrV4S5iTg7epZ/cyLQbzuwqJRNhUVTeaa8Z/xBOKl:exiT7ZQHhaReaaa81x8K

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1420-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1420-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1420-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/952-2-0x0000000003760000-0x000000000387B000-memory.dmp	family_djvu
behavioral2/memory/1420-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1420-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-42-0x0000000000400000-0x0000000000537000-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

2740 icacls.exe

pid	process
2740	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1696768468-2170909707-4198977321-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\52b49941-e4f0-4288-a367-66b39563c671\\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe\" --AutoStart"	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.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
7 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exec71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe

description	pid	process	target process
PID 952 set thread context of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 set thread context of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.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:

c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exec71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe

pid	process
1420	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
1420	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
2720	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
2720	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exec71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exec71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe

C:\Users\Admin\AppData\Local\Temp\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
"C:\Users\Admin\AppData\Local\Temp\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:952

C:\Users\Admin\AppData\Local\Temp\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
"C:\Users\Admin\AppData\Local\Temp\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1420

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\52b49941-e4f0-4288-a367-66b39563c671" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2740

C:\Users\Admin\AppData\Local\Temp\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
"C:\Users\Admin\AppData\Local\Temp\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4976

C:\Users\Admin\AppData\Local\Temp\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
"C:\Users\Admin\AppData\Local\Temp\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2720

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
23c3647724cc7d7f2fd92c7d36600f25

SHA1
11db3eca57631a679c174dfa364802fc6e841076

SHA256
b470d6bb0e33983041874f283d681bd6352325618a8b3b4c85321a8749f369b7

SHA512
aceddffd0cfa38e431910877804b7788bb34f4dd544d2691e4a2219c9ff59796c9f31c42b66f195b66ba6f33cd84fde7b7a04a053e8acc135531ccfffb3c41eb

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
3783d0c161eab244739bdb29bc6d4537

SHA1
a3fffaddd1c5d2c5b779c5ba7ae0e9ef9137de02

SHA256
f6d1a82ccb9607bcfb40f09b9c1e46085eb20b45287898e5eb6946bfc6b90bca

SHA512
faf2bf8ec86ed86398fc6ff9c8d34b3fd8ef2fd06e9b38134dbe367459f16f670dc732f0fdd60b91f3ed662f7dd8fad2d09fde5d9b60bb33233645669262adf1

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

MD5
7853206052fe5fd6e8cec8e7754e6919

SHA1
180b3aa766e4ca890c56002d5eea3b2eec15cfb0

SHA256
bae98cadd4270fd3896c111eb1d849603fad20161c4da2b97b29a092bfd5148b

SHA512
cdadbdc351f311c42c019da66ccf0a412122252d54e68507e7a376f69130e797d8b9dc2d088636bd76047c4ace65c2c392aebadbcb3579ef8d94add6e945f59c

Download Submit
C:\Users\Admin\AppData\Local\52b49941-e4f0-4288-a367-66b39563c671\c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
Filesize
808KB

MD5
6ba3c656ce436b2523104b0bbb5b6b6d

SHA1
7d4ac2a53edc6fd9fc0a5c385bf9619e1395984b

SHA256
c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b

SHA512
64f68877117e476ecc3fbccc9760660e6a2c071f96dd150652c4a1019a86f42b8abe444b4219dcf03a27c7de68ee3d28cc3b06ef8b529cf1434c8feb0d554d4a

Download Submit
memory/952-2-0x0000000003760000-0x000000000387B000-memory.dmp

Filesize
1.1MB

Download
memory/952-1-0x0000000001C80000-0x0000000001D1A000-memory.dmp

Filesize
616KB

Download
memory/1420-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1420-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1420-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1420-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1420-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2720-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-24-0x0000000001CF0000-0x0000000001D8A000-memory.dmp

Filesize
616KB

Download

description	pid	process	target process
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 952 wrote to memory of 1420	952	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 1420 wrote to memory of 2740	1420	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	icacls.exe
PID 1420 wrote to memory of 2740	1420	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	icacls.exe
PID 1420 wrote to memory of 2740	1420	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	icacls.exe
PID 1420 wrote to memory of 4976	1420	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 1420 wrote to memory of 4976	1420	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 1420 wrote to memory of 4976	1420	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe
PID 4976 wrote to memory of 2720	4976	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe	c71bd7ee3d81bea192703505bd91e06c70562f6d622649c3014e4a087ee3871b.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads