djvu | 672488666b68b99cef16ff0c1acfd3aa009df3f6d3f18897c5ecee77b77a57c7

General

Target

file.exe
Size

781KB
MD5

0333f0129897bffa8baa70d30eefadfd
SHA1

a99d6b1274f740b58158df0fbc71852503622ac0
SHA256

672488666b68b99cef16ff0c1acfd3aa009df3f6d3f18897c5ecee77b77a57c7
SHA512

06fd7b024c04c42d93c70e44ac39018115f90373eae5d9a8cccdf526034f2f3e57d0b22a3c6e0c617d737e03f9daab9c10cea8e40eb3c69eaeabdb2022e60d77
SSDEEP

12288:T6ESEvOgZx/Nd0wNCo7xztsyh98Q20DuV8gYjvozZfLiI:2EhvOgXw0lay20DuV8gAULiI

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.jawr
offline_id
UlJXrkKDIkENh0vb5W9For2Yyh6riGytjO5p2St1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/4792-2-0x00000000048D0000-0x00000000049EB000-memory.dmp	family_djvu
behavioral2/memory/2332-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2332-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2332-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2332-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2332-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1832-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1832-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1832-25-0x0000000000400000-0x0000000000537000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3640	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8211dfc5-f1fa-415b-af2d-2d8b42475dce\\file.exe\" --AutoStart"	file.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.

flow	ioc
48	api.2ip.ua
49	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4792 set thread context of 2332	4792	file.exe	93
PID 432 set thread context of 1832	432	file.exe	97

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4020	1832	WerFault.exe	97

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2332	file.exe
2332	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 4792 wrote to memory of 2332	4792	file.exe	93
PID 2332 wrote to memory of 3640	2332	file.exe	94
PID 2332 wrote to memory of 3640	2332	file.exe	94
PID 2332 wrote to memory of 3640	2332	file.exe	94
PID 2332 wrote to memory of 432	2332	file.exe	95
PID 2332 wrote to memory of 432	2332	file.exe	95
PID 2332 wrote to memory of 432	2332	file.exe	95
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97
PID 432 wrote to memory of 1832	432	file.exe	97

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4792
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2332
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8211dfc5-f1fa-415b-af2d-2d8b42475dce" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3640
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:432
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:1832
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1832 -s 568
        5⤵
        Program crash
        
        PID:4020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 192 -p 1832 -ip 1832
1⤵
PID:3524

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

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Downloads

C:\Users\Admin\AppData\Local\8211dfc5-f1fa-415b-af2d-2d8b42475dce\file.exe

Filesize
781KB

MD5
0333f0129897bffa8baa70d30eefadfd

SHA1
a99d6b1274f740b58158df0fbc71852503622ac0

SHA256
672488666b68b99cef16ff0c1acfd3aa009df3f6d3f18897c5ecee77b77a57c7

SHA512
06fd7b024c04c42d93c70e44ac39018115f90373eae5d9a8cccdf526034f2f3e57d0b22a3c6e0c617d737e03f9daab9c10cea8e40eb3c69eaeabdb2022e60d77

Download Submit
memory/432-20-0x00000000047A0000-0x000000000483A000-memory.dmp

Filesize
616KB

Download
memory/1832-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1832-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1832-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2332-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4792-1-0x0000000002D10000-0x0000000002DAF000-memory.dmp

Filesize
636KB

Download
memory/4792-2-0x00000000048D0000-0x00000000049EB000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads