djvu | c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa

General

Target

c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
Size

749KB
MD5

0e5ea2bf2748cb5b725bb244fbce0593
SHA1

eb52b5d11d5c130a0ff5218853f255e513ac90b1
SHA256

c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa
SHA512

c9de0b74a86c42dfc8d2b297a4753257770c83b851a87c9ca98415a9b68934e00669ccc966dbae7fa92e3ecc1eda288e35170bbf368efd70865c3e934253a62f
SSDEEP

12288:J/P+rH1JJ3YcMphLZGQzsZc5nz+RAaMH32H5dhRyM4z6ITB/4vhM:J/PM3TYLZGQzsunzYfckT4OITF4

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.bgjs
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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3524-2-0x0000000004980000-0x0000000004A9B000-memory.dmp	family_djvu
behavioral1/memory/2984-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2984-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2984-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2984-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2984-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2988-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

2504 icacls.exe

pid	process
2504	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\649299f6-9a58-4546-b85a-c6ff0571236c\\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe\" --AutoStart"	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.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

3 api.2ip.ua
6 api.2ip.ua

flow	ioc
3	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exec53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

description	pid	process	target process
PID 3524 set thread context of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 set thread context of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.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:

c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exec53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

pid	process
2984	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
2984	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
2988	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
2988	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exec53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exec53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

C:\Users\Admin\AppData\Local\Temp\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
"C:\Users\Admin\AppData\Local\Temp\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3524

C:\Users\Admin\AppData\Local\Temp\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
"C:\Users\Admin\AppData\Local\Temp\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2984

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\649299f6-9a58-4546-b85a-c6ff0571236c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:2504

C:\Users\Admin\AppData\Local\Temp\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
"C:\Users\Admin\AppData\Local\Temp\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4176

C:\Users\Admin\AppData\Local\Temp\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
"C:\Users\Admin\AppData\Local\Temp\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\649299f6-9a58-4546-b85a-c6ff0571236c\c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

Filesize
749KB

MD5
0e5ea2bf2748cb5b725bb244fbce0593

SHA1
eb52b5d11d5c130a0ff5218853f255e513ac90b1

SHA256
c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa

SHA512
c9de0b74a86c42dfc8d2b297a4753257770c83b851a87c9ca98415a9b68934e00669ccc966dbae7fa92e3ecc1eda288e35170bbf368efd70865c3e934253a62f

Download Submit
memory/2984-12-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2984-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2984-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2984-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2984-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-16-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2988-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3524-2-0x0000000004980000-0x0000000004A9B000-memory.dmp

Filesize
1.1MB

Download
memory/3524-1-0x0000000003140000-0x00000000031DA000-memory.dmp

Filesize
616KB

Download

description	pid	process	target process
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 3524 wrote to memory of 2984	3524	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 2984 wrote to memory of 2504	2984	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	icacls.exe
PID 2984 wrote to memory of 2504	2984	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	icacls.exe
PID 2984 wrote to memory of 2504	2984	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	icacls.exe
PID 2984 wrote to memory of 4176	2984	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 2984 wrote to memory of 4176	2984	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 2984 wrote to memory of 4176	2984	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe
PID 4176 wrote to memory of 2988	4176	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe	c53669027ae0872e09a1e78b75971f1a6260301e00c9a9fb5465efc6c65d93aa.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads