djvu | 4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd

General

Target

4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
Size

746KB
MD5

23c27e8bdb1ff3db612870d99286da5d
SHA1

55f645e84e402af7faaf50e92032f3283ea7e7c6
SHA256

4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd
SHA512

665715900f37cb369c1153dc31170192518b83d2b592086ede539f9333bf67fc5088ae2b5fbbabb3a3b79013b05b83e4c40a39b41e2b354361c93feebac14cb5

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://ring1.ug/As73yhsyU34578hxxx/SDf565g/get.php

Attributes

extension
.meka
offline_id
iToA4bsB4p1U6eP9sYfwett26TIoVaIjXvmekat1
payload_url
http://ring1.ug/files/cost/updatewin1.exe
http://ring1.ug/files/cost/updatewin2.exe
http://ring1.ug/files/cost/updatewin.exe
http://ring1.ug/files/cost/3.exe
http://ring1.ug/files/cost/4.exe
http://ring1.ug/files/cost/5.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4468-131-0x0000000001150000-0x000000000126A000-memory.dmp	family_djvu
behavioral2/memory/4468-132-0x0000000000400000-0x0000000000C58000-memory.dmp	family_djvu
behavioral2/memory/4780-137-0x0000000001260000-0x000000000137A000-memory.dmp	family_djvu
behavioral2/memory/4780-138-0x0000000000400000-0x0000000000C58000-memory.dmp	family_djvu
behavioral2/memory/4468-139-0x0000000000400000-0x0000000000C58000-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:

4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exe

pid process

3404 icacls.exe

pid	process
3404	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\53fb6378-c8e9-4df6-bec2-e05dd2b36732\\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe\" --AutoStart"	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.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

6 api.2ip.ua
27 api.2ip.ua
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4876 4468 WerFault.exe 4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

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

pid	pid_target	process	target process
4876	4468	WerFault.exe	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

pid	process
4468	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
4468	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
4780	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
4780	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

description	pid	process	target process
PID 4468 wrote to memory of 3404	4468	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe	icacls.exe
PID 4468 wrote to memory of 3404	4468	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe	icacls.exe
PID 4468 wrote to memory of 3404	4468	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe	icacls.exe
PID 4468 wrote to memory of 4780	4468	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
PID 4468 wrote to memory of 4780	4468	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
PID 4468 wrote to memory of 4780	4468	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe	4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe

C:\Users\Admin\AppData\Local\Temp\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
"C:\Users\Admin\AppData\Local\Temp\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4468

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\53fb6378-c8e9-4df6-bec2-e05dd2b36732" /deny *S-1-1-0:(OI)(CI)(DE,DC)
2⤵
- Modifies file permissions
PID:3404

C:\Users\Admin\AppData\Local\Temp\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
"C:\Users\Admin\AppData\Local\Temp\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe" --Admin IsNotAutoStart IsNotTask
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:4780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4468 -s 1412
2⤵
- Program crash
PID:4876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4468 -ip 4468
1⤵
PID:1008

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File 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

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Downloads

C:\Users\Admin\AppData\Local\53fb6378-c8e9-4df6-bec2-e05dd2b36732\4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd.exe
Filesize
746KB

MD5
23c27e8bdb1ff3db612870d99286da5d

SHA1
55f645e84e402af7faaf50e92032f3283ea7e7c6

SHA256
4598a0c09cb160c295b10c02d3ccfb261cd728b11f4fd1d47db21702100670bd

SHA512
665715900f37cb369c1153dc31170192518b83d2b592086ede539f9333bf67fc5088ae2b5fbbabb3a3b79013b05b83e4c40a39b41e2b354361c93feebac14cb5

Download Submit
memory/3404-133-0x0000000000000000-mapping.dmp

Download
memory/4468-130-0x0000000000DB6000-0x0000000000E47000-memory.dmp

Filesize
580KB

Download
memory/4468-131-0x0000000001150000-0x000000000126A000-memory.dmp

Filesize
1.1MB

Download
memory/4468-132-0x0000000000400000-0x0000000000C58000-memory.dmp

Filesize
8.3MB

Download
memory/4468-139-0x0000000000400000-0x0000000000C58000-memory.dmp

Filesize
8.3MB

Download
memory/4780-135-0x0000000000000000-mapping.dmp

Download
memory/4780-136-0x000000000108C000-0x000000000111D000-memory.dmp

Filesize
580KB

Download
memory/4780-137-0x0000000001260000-0x000000000137A000-memory.dmp

Filesize
1.1MB

Download
memory/4780-138-0x0000000000400000-0x0000000000C58000-memory.dmp

Filesize
8.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads