djvu | 2a707ff6a4840639e838d39cc367333bb92da01d39642002c1d26e26889df119

General

Target

file.exe
Size

703KB
MD5

4ab7f99ee2a21823a94f2faaab068c7b
SHA1

d7c7a4ebb1dc15a5889c9160334e197fc6362e35
SHA256

2a707ff6a4840639e838d39cc367333bb92da01d39642002c1d26e26889df119
SHA512

bbeaae0fad7e03f88cd669f3dc86529bfba1c24fccd76aa75bf2a5572b49db2fe058b3defaebad411d684af0aab649b25e909df5f46846e7c4dbeb393a2534b7
SSDEEP

12288:pTuV8st8gmcSo/Wu/Ue1EBYiub+09RkNAqiCEf2stmM:AVLt5bS+LUe+Y/9RIXKht

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.cdaz
offline_id
dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1
payload_url
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-e21iz7dS58 Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0843ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/416-2-0x0000000002680000-0x000000000279B000-memory.dmp	family_djvu
behavioral2/memory/2872-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2872-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2872-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2872-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2872-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1468-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1468-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1468-23-0x0000000000400000-0x0000000000537000-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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4540	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-1-5-21-2398549320-3657759451-817663969-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\47c9d6e7-4ffe-40f7-94d7-9e5ef3fabbb7\\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
50	api.2ip.ua
52	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 416 set thread context of 2872	416	file.exe	97
PID 4232 set thread context of 1468	4232	file.exe	105

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
3260	1468	WerFault.exe	105

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2872	file.exe
2872	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 416 wrote to memory of 2872	416	file.exe	97
PID 2872 wrote to memory of 4540	2872	file.exe	98
PID 2872 wrote to memory of 4540	2872	file.exe	98
PID 2872 wrote to memory of 4540	2872	file.exe	98
PID 2872 wrote to memory of 4232	2872	file.exe	99
PID 2872 wrote to memory of 4232	2872	file.exe	99
PID 2872 wrote to memory of 4232	2872	file.exe	99
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105
PID 4232 wrote to memory of 1468	4232	file.exe	105

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:416
- 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:2872
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\47c9d6e7-4ffe-40f7-94d7-9e5ef3fabbb7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4540
- - 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:4232
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:1468
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1468 -s 568
        5⤵
        Program crash
        
        PID:3260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1468 -ip 1468
1⤵
PID:3292

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\47c9d6e7-4ffe-40f7-94d7-9e5ef3fabbb7\file.exe

Filesize
703KB

MD5
4ab7f99ee2a21823a94f2faaab068c7b

SHA1
d7c7a4ebb1dc15a5889c9160334e197fc6362e35

SHA256
2a707ff6a4840639e838d39cc367333bb92da01d39642002c1d26e26889df119

SHA512
bbeaae0fad7e03f88cd669f3dc86529bfba1c24fccd76aa75bf2a5572b49db2fe058b3defaebad411d684af0aab649b25e909df5f46846e7c4dbeb393a2534b7

Download Submit
memory/416-1-0x0000000002500000-0x0000000002595000-memory.dmp

Filesize
596KB

Download
memory/416-2-0x0000000002680000-0x000000000279B000-memory.dmp

Filesize
1.1MB

Download
memory/1468-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1468-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1468-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2872-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2872-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2872-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2872-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2872-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4232-18-0x0000000002420000-0x00000000024BF000-memory.dmp

Filesize
636KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads