djvu | 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a

General

Target

4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
Size

749KB
MD5

cf3c3f6d06eb8dd404cc00985d48aac9
SHA1

18983221c5bddef39d652c56aaf86ebbe0b543ee
SHA256

4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a
SHA512

96bab63db330605f3a1ae3394b685bf2d21e257341723d440a9277cad6b971b403a8a29ae692ca6c2f1e7e5060765111120c1bfc87132befee658da71038ecd4
SSDEEP

12288:PNoZVbIhDoX1L9nC+DUSKEMz4exreOipN0RJaHute4UKxVMdNawFIq7fD6d/A:PSZZiy1B5DUSrdexiOS6JJGqVMayfOd

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
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

Processes:

resource	yara_rule
behavioral1/memory/4544-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2240-4-0x00000000048B0000-0x00000000049CB000-memory.dmp	family_djvu
behavioral1/memory/4544-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4544-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4544-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4544-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2364-31-0x0000000000400000-0x0000000000537000-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:

4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

4124 icacls.exe

pid	process
4124	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\01da8b88-799c-4c0a-9738-6bca8febea60\\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe\" --AutoStart"	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.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:

4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe

description	pid	process	target process
PID 2240 set thread context of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 set thread context of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.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:

4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe

pid	process
4544	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
4544	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
2364	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
2364	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe

C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
"C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2240

C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
"C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4544

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\01da8b88-799c-4c0a-9738-6bca8febea60" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4124

C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
"C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4404

C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
"C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2364

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\01da8b88-799c-4c0a-9738-6bca8febea60\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
Filesize
749KB

MD5
cf3c3f6d06eb8dd404cc00985d48aac9

SHA1
18983221c5bddef39d652c56aaf86ebbe0b543ee

SHA256
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a

SHA512
96bab63db330605f3a1ae3394b685bf2d21e257341723d440a9277cad6b971b403a8a29ae692ca6c2f1e7e5060765111120c1bfc87132befee658da71038ecd4

Download Submit
memory/2240-2-0x0000000002FD0000-0x0000000003070000-memory.dmp

Filesize
640KB

Download
memory/2240-4-0x00000000048B0000-0x00000000049CB000-memory.dmp

Filesize
1.1MB

Download
memory/2364-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-16-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2364-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-1-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-12-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 2240 wrote to memory of 4544	2240	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4544 wrote to memory of 4124	4544	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	icacls.exe
PID 4544 wrote to memory of 4124	4544	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	icacls.exe
PID 4544 wrote to memory of 4124	4544	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	icacls.exe
PID 4544 wrote to memory of 4404	4544	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4544 wrote to memory of 4404	4544	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4544 wrote to memory of 4404	4544	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
PID 4404 wrote to memory of 2364	4404	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe	4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads