djvu | 8ed183df76d08024f15e051f4f5711535dde6372ff4beafecfff07f82e846800

Analysis

max time kernel
169s
max time network
182s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2024 15:12

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General

Target

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
Size

732KB
MD5

9346199aa06d8fa74051e98b06cd3d26
SHA1

9020c5dbcb80340517916272f2479001b2bfdff3
SHA256

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f
SHA512

a7e4b195c6eefa011b729deb32ffe533ef61bb2126e68272cba26ec8b2fc49b3e75327abb9f916530db911a1b7854020234300a02c87c65d6cd89b661ce18f58
SSDEEP

12288:FEIJVxZIpeKXqWdXoeSPEWOSNXCdepyeEPbObcy9BwoWNffeKuIhQ+0F:F3VxZIprXqWdXoDPEWO8XCdebcONXwoy

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://acacaca.org/test1/get.php

Attributes

extension
.dkrf
offline_id
JPKXWc5eWNjIicWmQyJxv6NCjbH02qrKi0af9Zt1
payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/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. You can get and look video overview decrypt tool: https://we.tl/t-aMsnHoiJcO Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: support@bestyourmail.ch Reserve e-mail address to contact us: supportsys@airmail.cc Your personal ID: 0508Usjdjs

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 10 IoCs

Processes:

resource	yara_rule
behavioral16/memory/2940-2-0x00000000021F0000-0x000000000230B000-memory.dmp	family_djvu
behavioral16/memory/1972-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral16/memory/1972-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral16/memory/1972-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral16/memory/1972-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral16/memory/1972-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral16/memory/1972-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral16/memory/4268-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral16/memory/4268-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral16/memory/4268-30-0x0000000000400000-0x0000000000537000-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:

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

4996 icacls.exe

pid	process
4996	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2d4f45b1-2809-4e4b-87e2-00e17bbbf08d\\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe\" --AutoStart"	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.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

46 api.2ip.ua
47 api.2ip.ua

flow	ioc
46	api.2ip.ua
47	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

description	pid	process	target process
PID 2940 set thread context of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 set thread context of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
3856	4268	WerFault.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
1864	4268	WerFault.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

pid	process
1972	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
1972	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe

C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
"C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2940

C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
"C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1972

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\2d4f45b1-2809-4e4b-87e2-00e17bbbf08d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4996

C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
"C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:224

C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
"C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious use of WriteProcessMemory
PID:4268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4268 -s 568
5⤵
- Program crash
PID:3856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4268 -s 568
5⤵
- Program crash
PID:1864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4268 -ip 4268
1⤵
PID:2944

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\2d4f45b1-2809-4e4b-87e2-00e17bbbf08d\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
Filesize
732KB

MD5
9346199aa06d8fa74051e98b06cd3d26

SHA1
9020c5dbcb80340517916272f2479001b2bfdff3

SHA256
5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f

SHA512
a7e4b195c6eefa011b729deb32ffe533ef61bb2126e68272cba26ec8b2fc49b3e75327abb9f916530db911a1b7854020234300a02c87c65d6cd89b661ce18f58

Download Submit
memory/224-23-0x0000000002180000-0x0000000002218000-memory.dmp

Filesize
608KB

Download
memory/1972-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1972-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1972-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1972-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1972-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1972-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2940-2-0x00000000021F0000-0x000000000230B000-memory.dmp

Filesize
1.1MB

Download
memory/2940-1-0x00000000020C0000-0x0000000002159000-memory.dmp

Filesize
612KB

Download
memory/4268-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4268-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4268-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 2940 wrote to memory of 1972	2940	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 1972 wrote to memory of 4996	1972	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	icacls.exe
PID 1972 wrote to memory of 4996	1972	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	icacls.exe
PID 1972 wrote to memory of 4996	1972	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	icacls.exe
PID 1972 wrote to memory of 224	1972	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 1972 wrote to memory of 224	1972	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 1972 wrote to memory of 224	1972	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 224 wrote to memory of 4268	224	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
PID 4268 wrote to memory of 3856	4268	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	WerFault.exe
PID 4268 wrote to memory of 3856	4268	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	WerFault.exe
PID 4268 wrote to memory of 3856	4268	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	WerFault.exe