djvu | 347c3b434e770b38ce06819cad853f93cb139fb4304e40a78933d92f56749d12

Analysis

max time kernel
143s
max time network
125s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
05/12/2023, 17:29

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General

Target

file.exe
Size

778KB
MD5

3d3158bde3e31d3b7b9c1e1e2398ddd5
SHA1

f1d1ff15a739eb1fc5460c3dff7b2ad78ca53788
SHA256

347c3b434e770b38ce06819cad853f93cb139fb4304e40a78933d92f56749d12
SHA512

5b7016ac1d24913b28447980e51f0a7ebd9cd6fe370772409f402c04ea009384656913527a1c3e63c215bcda19b63080c636c3516cd21ee1f477479081e94a7d
SSDEEP

12288:U/2nq6Bx5H+0g3zSKAPIOLTGEuSzbgQX6D3V6YzN4188r6McBg7bO0RtrEhXM:UGqmeXSKnKRsc7CKjrABg766ri

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.nbwr
offline_id
csCsb6cUvy0iMa6NgGCGH0hSfXQlGjZVEmFVkgt1
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-8dGJ2tqlOd 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: 0833ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 11 IoCs

resource	yara_rule
behavioral1/memory/2420-2-0x0000000002580000-0x000000000269B000-memory.dmp	family_djvu
behavioral1/memory/2576-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2576-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2576-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2576-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2608-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2608-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2608-61-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2608-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2608-62-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2608-63-0x0000000000400000-0x0000000000537000-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
2696	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-1-5-21-3425689832-2386927309-2650718742-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c6c76441-aaef-428c-a578-fa32de039350\\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 2420 set thread context of 2576	2420	file.exe	28
PID 2752 set thread context of 2608	2752	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
2576	file.exe
2608	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2420 wrote to memory of 2576	2420	file.exe	28
PID 2576 wrote to memory of 2696	2576	file.exe	29
PID 2576 wrote to memory of 2696	2576	file.exe	29
PID 2576 wrote to memory of 2696	2576	file.exe	29
PID 2576 wrote to memory of 2696	2576	file.exe	29
PID 2576 wrote to memory of 2752	2576	file.exe	30
PID 2576 wrote to memory of 2752	2576	file.exe	30
PID 2576 wrote to memory of 2752	2576	file.exe	30
PID 2576 wrote to memory of 2752	2576	file.exe	30
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	file.exe	31
PID 2752 wrote to memory of 2608	2752	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:2420
- 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:2576
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c6c76441-aaef-428c-a578-fa32de039350" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2696
- - 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:2752
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2608

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
9893918188d52d9db9c70bbb543887a0

SHA1
094d45a5107ae9a1e501f4fa150ec2738891a481

SHA256
726c1438e9613a213596c4985bc076678182891b1506b93a65e679f1cb09a07f

SHA512
d504bfee3f7394315413c235a7af2fa8469c20ccecf15eec34b9f9ae29742b024bc5266341d76aed8067868246bd93bc44a87f6d35b98b927be3b8dc4e3cec4d

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
e137ba5bb4d738d8f9a1904a11594ac1

SHA1
322431ca67a2fad3e88a7e3e4a437f6140bc5b52

SHA256
56756ba5ee8f6cf1807ab1563efbb63affd1f79fcfd7383d35313864b79766fe

SHA512
25458198af030593451995b846881935c62b858765b7219302aaeaed38152adfd3f718f465073071dfcb0715f07ba058e77d1bae2c08d2ff24bd274debe33a58

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

Filesize
344B

MD5
6c7e0e6aa61fdd29f35479de973b710d

SHA1
f3566c290535b4823ffe7b4b0ff2d8f14ce066ac

SHA256
29d9a04af83b8563a3b8f3d0ae85434a47ae8e36aa6ae305c1c1e6b5c423377f

SHA512
6745e58463eedc4e7d745a96c28b16813bc3a6fbd6ecb58d672612e980a38109d75ae92b8e7ae9fbb68d43fd01c41f49ba468e10690f5c89dc6ae6c9347a4926

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

Filesize
392B

MD5
68fbb96b8414c5298669038e4dc371c2

SHA1
13675e102443c75ef3247f1e28d3e3ededf6c5df

SHA256
42a6ad5fcfea67e94e7d74d3a4e8429bf3e54f63bad2b7ec2f975c8e27fc1562

SHA512
484ba64722a037dcc292a32343b7b5bdb6c60e65b4e8a8569a81e53dc2a9c2929528acd8737955713a76cde1b3294555a99875d2e1177b9b7b483d7de8a9eef7

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab7511.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
C:\Users\Admin\AppData\Local\c6c76441-aaef-428c-a578-fa32de039350\file.exe

Filesize
778KB

MD5
3d3158bde3e31d3b7b9c1e1e2398ddd5

SHA1
f1d1ff15a739eb1fc5460c3dff7b2ad78ca53788

SHA256
347c3b434e770b38ce06819cad853f93cb139fb4304e40a78933d92f56749d12

SHA512
5b7016ac1d24913b28447980e51f0a7ebd9cd6fe370772409f402c04ea009384656913527a1c3e63c215bcda19b63080c636c3516cd21ee1f477479081e94a7d

Download Submit
memory/2420-1-0x0000000000C20000-0x0000000000CB2000-memory.dmp

Filesize
584KB

Download
memory/2420-2-0x0000000002580000-0x000000000269B000-memory.dmp

Filesize
1.1MB

Download
memory/2420-0-0x0000000000C20000-0x0000000000CB2000-memory.dmp

Filesize
584KB

Download
memory/2576-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2576-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2576-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2576-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2576-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-62-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2608-63-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2752-27-0x0000000000330000-0x00000000003C2000-memory.dmp

Filesize
584KB

Download
memory/2752-34-0x0000000000330000-0x00000000003C2000-memory.dmp

Filesize
584KB

Download