djvu | 2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c

Analysis

max time kernel
143s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
17/04/2024, 23:42

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General

Target
2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
Size 808KB
Sample240417-3p2masaa43
SHA256 2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c
MD5 755cfe4db9650f2dac91954ee09661e9
SHA1 819771d095ae6aa671ac602da50ab1862000d991
SHA512 4dbdb65136ee230e9ad8d8c3ae2c3e91c11caaf7b0777a45f0ef2e48d8d52bb3efbe823cf361dbd5f6dcac13d1a12b235c86734b52de5876e728cc609175d553
SSDEEP 12288:97FIep+QO7qpK9ynTIX5Fi9UxzRfpYebFOJCXbMDTfiqC/3spbWsRHtorhhdG:9rpKri9IB+e5O6bQOO6s5to1D
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://sajdfue.com/test1/get.php

Attributes

extension
.uajs
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.com/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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0859PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/4696-2-0x0000000004CB0000-0x0000000004DCB000-memory.dmp	family_djvu
behavioral2/memory/3692-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3692-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3692-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3692-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3692-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2260-39-0x0000000000400000-0x0000000000537000-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
4232	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-1-5-21-801765966-3955847401-2235691403-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b3d1670a-4529-426a-8e3f-da975aa8a2ba\\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe\" --AutoStart"	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.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
1	api.2ip.ua
2	api.2ip.ua
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4696 set thread context of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4300 set thread context of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3692	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
3692	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
2260	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
2260	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 4696 wrote to memory of 3692	4696	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	77
PID 3692 wrote to memory of 4232	3692	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	78
PID 3692 wrote to memory of 4232	3692	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	78
PID 3692 wrote to memory of 4232	3692	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	78
PID 3692 wrote to memory of 4300	3692	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	79
PID 3692 wrote to memory of 4300	3692	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	79
PID 3692 wrote to memory of 4300	3692	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	79
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82
PID 4300 wrote to memory of 2260	4300	2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe	82

C:\Users\Admin\AppData\Local\Temp\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
"C:\Users\Admin\AppData\Local\Temp\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4696
- C:\Users\Admin\AppData\Local\Temp\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
  "C:\Users\Admin\AppData\Local\Temp\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3692
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b3d1670a-4529-426a-8e3f-da975aa8a2ba" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4232
- - C:\Users\Admin\AppData\Local\Temp\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
    "C:\Users\Admin\AppData\Local\Temp\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4300
  - - C:\Users\Admin\AppData\Local\Temp\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
      "C:\Users\Admin\AppData\Local\Temp\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2260

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

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 b1c8a7c134fa736577b3841065a56a56827381b44f95b1664da5a6e7ef6ddb3f
MD5 77ee8e04347054f167cc7ec40d57354d
SHA1 4a446de1091ae5e12e09c63b35e70b0a2b8948ec
SHA512 905e6f0e8cbb9b04b1c00f1c61a283ef5f01f5afa1cf6b23e94b74f51df641b1e464ed30560a172dfe2d99ba09318b440304f99160f5d328359243266f0a37de
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 3fce23a900f799ecbe174376fb4fb3e856c5c7e90608d6fb9a1c4b1948286d05
MD5 cdaa22d9133dbf8753d919b3815e6072
SHA1 9a9454748bb4bed9652fb025385e0df60bbd5012
SHA512 9563828e677aa2601138a574ef1f473f150a1e490056e409ea24b124c973a23b61b38b2ca171ec25c76037f8f89a93885b560966732e8eab94d51b9eef84f5b6
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 e32072917b0ad65e431b04938c5680af50ca2a89cef4c2dcc8cd2135d472b82f
MD5 68b219462870dce37acb62ff179783e3
SHA1 f6e26b44bfbc8f641632791041056a212e68a862
SHA512 a957305d76d0802912f093d04512e500d14efc4d9ebf63953e4d2b711ce0e522d338237236ce23f1277c20c71d1cc73491114bce4f8a31810a10f3e291424175
MD5 SHA1 SHA512

Submit Download

2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe

Path C:\Users\Admin\AppData\Local\b3d1670a-4529-426a-8e3f-da975aa8a2ba\2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c.exe
Size 808KB
SHA256 2fd6aeb8791af9e6c54ada9492b2fa54c04377913a29ceb32d63eaa951e2f29c
MD5 755cfe4db9650f2dac91954ee09661e9
SHA1 819771d095ae6aa671ac602da50ab1862000d991
SHA512 4dbdb65136ee230e9ad8d8c3ae2c3e91c11caaf7b0777a45f0ef2e48d8d52bb3efbe823cf361dbd5f6dcac13d1a12b235c86734b52de5876e728cc609175d553
SSDEEP 12288:97FIep+QO7qpK9ynTIX5Fi9UxzRfpYebFOJCXbMDTfiqC/3spbWsRHtorhhdG:9rpKri9IB+e5O6bQOO6s5to1D
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2260-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2260-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3692-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3692-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3692-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3692-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3692-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4300-20-0x0000000004B20000-0x0000000004BBA000-memory.dmp

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memory/4696-2-0x0000000004CB0000-0x0000000004DCB000-memory.dmp

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memory/4696-1-0x0000000004C10000-0x0000000004CA9000-memory.dmp

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