djvu | 672488666b68b99cef16ff0c1acfd3aa009df3f6d3f18897c5ecee77b77a57c7

Analysis

max time kernel
148s
max time network
126s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
28/11/2023, 21:12

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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

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

Attributes

extension
.jawr
offline_id
UlJXrkKDIkENh0vb5W9For2Yyh6riGytjO5p2St1
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-iu965qqEb1 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: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0831Usdk

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/2040-3-0x0000000004320000-0x000000000443B000-memory.dmp	family_djvu
behavioral1/memory/2020-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2020-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2020-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2020-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-62-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-63-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-64-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-65-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2572	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-1-5-21-2085049433-1067986815-1244098655-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\320bdf40-f176-4f17-a7c6-b96596b70698\\file.exe\" --AutoStart"	file.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2040 set thread context of 2020	2040	file.exe	28
PID 2732 set thread context of 2496	2732	file.exe	31

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2020	file.exe
2496	file.exe
2496	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2040 wrote to memory of 2020	2040	file.exe	28
PID 2020 wrote to memory of 2572	2020	file.exe	29
PID 2020 wrote to memory of 2572	2020	file.exe	29
PID 2020 wrote to memory of 2572	2020	file.exe	29
PID 2020 wrote to memory of 2572	2020	file.exe	29
PID 2020 wrote to memory of 2732	2020	file.exe	30
PID 2020 wrote to memory of 2732	2020	file.exe	30
PID 2020 wrote to memory of 2732	2020	file.exe	30
PID 2020 wrote to memory of 2732	2020	file.exe	30
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31
PID 2732 wrote to memory of 2496	2732	file.exe	31

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:2040
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2020
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\320bdf40-f176-4f17-a7c6-b96596b70698" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2572
- - 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:2732
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2496

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
f17544a292ca15b6eabc795c4f0f6ec1

SHA1
7eefc9b0053afe0b0082bb2350b0bbe93acd09b6

SHA256
dfd92733d34b61f4b0cc79cbdbec719bfa4624ac1bebf3cc9d824aa15c2b7291

SHA512
2aaf7225c81243c0a7f5037185eb74d71fe112546f91538c4d3e3d4057a69911d23fda276b536278298092780bd24dccf3e404abcfca6405b5083a2443f72480

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
229ead3f7b9adafcc2abcaeb07829c13

SHA1
b403bab0d2864b2cf23238954930aa5983a77c7b

SHA256
8e515ee9c355a9cacea9df869def59ccbbbcf7e7040d272b5378e6ff6cc014d7

SHA512
fb55eddb70e2a8f5c29dceaa47bc2b95586d916c7147de191db2fe1a0034625242fcb17922a72fedb09e5299307fec968dc9ff1e3f2c25cd65a8d42e5de8c3b2

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
606ff07b14f7e4bc846d3fa6cb87cfe7

SHA1
7c4045d821e5a5f71b1229ae3ad9a855e5be9b83

SHA256
0c9af3f5411cd9c04ba73e9b9fcac667564b9509aefa6908062fc17875de7e70

SHA512
19f0ded1f606c063bac22f5f10af20ee0c74943dcc905a9adcc6796e37b6489e7422859e03639416925cd55641f74f1b451a53972b4393b6175d6ce5d7e5c3c3

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
931cac0458dc1820c23e229d26b97a2e

SHA1
c280da24abbe02131dd28c0ea736bbea9a8538c4

SHA256
4a16cac1e67a024cebb90751846aedd1b7633b94d8a7f37a72127b93754fc345

SHA512
c58b540da7699d562fad08244ea7e179116d8e551b85432af23453ea1aa5e74ecf69d548d7f25de05df98e3833989cfb5c87356f37555048f88c6228cbf2fc88

Download Submit
C:\Users\Admin\AppData\Local\320bdf40-f176-4f17-a7c6-b96596b70698\file.exe

Filesize
781KB

MD5
0333f0129897bffa8baa70d30eefadfd

SHA1
a99d6b1274f740b58158df0fbc71852503622ac0

SHA256
672488666b68b99cef16ff0c1acfd3aa009df3f6d3f18897c5ecee77b77a57c7

SHA512
06fd7b024c04c42d93c70e44ac39018115f90373eae5d9a8cccdf526034f2f3e57d0b22a3c6e0c617d737e03f9daab9c10cea8e40eb3c69eaeabdb2022e60d77

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabB4ED.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
memory/2020-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2020-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2020-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2020-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2020-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2040-6-0x0000000002B40000-0x0000000002BD2000-memory.dmp

Filesize
584KB

Download
memory/2040-3-0x0000000004320000-0x000000000443B000-memory.dmp

Filesize
1.1MB

Download
memory/2040-0-0x0000000002B40000-0x0000000002BD2000-memory.dmp

Filesize
584KB

Download
memory/2040-1-0x0000000002B40000-0x0000000002BD2000-memory.dmp

Filesize
584KB

Download
memory/2496-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-62-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-63-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-64-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2732-37-0x0000000002B40000-0x0000000002BD2000-memory.dmp

Filesize
584KB

Download
memory/2732-32-0x0000000002B40000-0x0000000002BD2000-memory.dmp

Filesize
584KB

Download
memory/2732-31-0x0000000002B40000-0x0000000002BD2000-memory.dmp

Filesize
584KB

Download