djvu | ca45f40c10f30d2c60b2ab67afffc295763d61c890f92b4bc71885d96ac56e18

Analysis

max time kernel
150s
max time network
125s
platform
windows7_x64
resource
win7-20231025-en
resource tags

arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
submitted
15/11/2023, 18:31

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General

Target

file.exe
Size

749KB
MD5

ad1f4ef175202d30916a890305ca230b
SHA1

b9382557bb2eb93cde8ff52ece9ee1e58372ef99
SHA256

ca45f40c10f30d2c60b2ab67afffc295763d61c890f92b4bc71885d96ac56e18
SHA512

9c2da2f37dabf3a29172a31f742b6d068b7c5e54e00c43aa00f5a6d6a0db23f4cf7edce71717126029a048dbd539132910917b61d06585bc4207bd09b4330bd3
SSDEEP

12288:F9IGRHPCWz+KoCAObHpto+VQUN4TYc0Q70xocaSyE8pnMsnW7EQdHZJCtIv/:RyCAqbPQUN4sEsaS6VMs+57JCt

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.eqza
offline_id
MI4io8cIlhyYsGaDxoKsbpWzfIe5lGPE0dYtrht1
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-Y6UIMfI736 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: 0825eQesA

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/3000-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2940-6-0x0000000001E20000-0x0000000001F3B000-memory.dmp	family_djvu
behavioral1/memory/3000-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3000-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3000-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2496-61-0x0000000000400000-0x0000000000537000-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

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
2700	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-1-5-21-1861898231-3446828954-4278112889-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1cf50187-42b3-4d8c-9969-f7ca208b9669\\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 2940 set thread context of 3000	2940	file.exe	28
PID 2644 set thread context of 2496	2644	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 2 IoCs

pid	Process
3000	file.exe
2496	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 2940 wrote to memory of 3000	2940	file.exe	28
PID 3000 wrote to memory of 2700	3000	file.exe	29
PID 3000 wrote to memory of 2700	3000	file.exe	29
PID 3000 wrote to memory of 2700	3000	file.exe	29
PID 3000 wrote to memory of 2700	3000	file.exe	29
PID 3000 wrote to memory of 2644	3000	file.exe	30
PID 3000 wrote to memory of 2644	3000	file.exe	30
PID 3000 wrote to memory of 2644	3000	file.exe	30
PID 3000 wrote to memory of 2644	3000	file.exe	30
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	file.exe	31
PID 2644 wrote to memory of 2496	2644	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:2940
- 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:3000
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\1cf50187-42b3-4d8c-9969-f7ca208b9669" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2700
- - 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:2644
  - - 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
60ff5e3155e334a8076b936e0fe0d2d3

SHA1
d792557b90b72beee7fb7d9f5cc111dde0644dc5

SHA256
abe8aef70bb6d42b05c88e1ad3ceaa9afd6a6d6162c319b2521ae85973ed06fd

SHA512
5affc06e5d14c4c1538df4d5e8d3a1707fa948f0f5cf23e808265ddcdc3b2e4f70c4f4973ff4ca5b15e5d94903fdf628c4e077c1b90dfcab29b6edeebb0161c5

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
59fabfd938a87ef0d8b7b66251e87a9b

SHA1
1fd71f291d82a889383869c9a3721e5588969a8b

SHA256
02cd3d9e1a02e1ea52f16cb69b1461c5986d319b0ceff07bb2fe7cc8077863b3

SHA512
1b644d87f8ec7d2c223eed0646a5fca9fface49677ecced5c70eca32cfd3993f59362cc63e3d7c84b3cc1ebf838248885979ed20472e865c722c0a8f0a583b17

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

Filesize
344B

MD5
e3d67e7575a96ab324b9506549b8d7e1

SHA1
577d465c2f4bed3919de21c0ef7c971f26d60305

SHA256
ffc4c1ee9f22f233342b9a8fee6eb61e3b18936e80d309b6e33dad77de712f10

SHA512
1548561decf1b282b37106c41972a91a0c0b6bbe98274f3f49183baa1b6408cd8648964a1c67ae17657c0d935fa5bc2f4cd29dfd18fb32ebeadf0b646d5ffaf6

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

Filesize
392B

MD5
47300b24ac6d9e4345f501f9022f7287

SHA1
b46c19ab9bf0f44004bb72e3f12204dcb0a69721

SHA256
8eac72e5062ebddaf4fd50a3d61b06711de3c97010f2af51530dcaa5dd8d3267

SHA512
bf98868db773b85d9dccf66d298fb68e0375f640572b51028ee353c581e22bb3b07647e9cfb25522e379254e137bf81fac73bcad263bcc97389c5ce68d2ab30a

Download Submit
C:\Users\Admin\AppData\Local\1cf50187-42b3-4d8c-9969-f7ca208b9669\file.exe

Filesize
749KB

MD5
ad1f4ef175202d30916a890305ca230b

SHA1
b9382557bb2eb93cde8ff52ece9ee1e58372ef99

SHA256
ca45f40c10f30d2c60b2ab67afffc295763d61c890f92b4bc71885d96ac56e18

SHA512
9c2da2f37dabf3a29172a31f742b6d068b7c5e54e00c43aa00f5a6d6a0db23f4cf7edce71717126029a048dbd539132910917b61d06585bc4207bd09b4330bd3

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab63C2.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
memory/2496-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

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

Filesize
1.2MB

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

Filesize
1.2MB

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

Filesize
1.2MB

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

Filesize
1.2MB

Download
memory/2496-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2496-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2644-30-0x00000000002A0000-0x0000000000331000-memory.dmp

Filesize
580KB

Download
memory/2644-31-0x00000000002A0000-0x0000000000331000-memory.dmp

Filesize
580KB

Download
memory/2644-36-0x00000000002A0000-0x0000000000331000-memory.dmp

Filesize
580KB

Download
memory/2940-0-0x0000000000300000-0x0000000000391000-memory.dmp

Filesize
580KB

Download
memory/2940-4-0x0000000000300000-0x0000000000391000-memory.dmp

Filesize
580KB

Download
memory/2940-6-0x0000000001E20000-0x0000000001F3B000-memory.dmp

Filesize
1.1MB

Download
memory/3000-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3000-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3000-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3000-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3000-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download