djvu | 84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b

Analysis

max time kernel
147s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
27/05/2024, 12:10

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General

Target
84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
Size 771KB
Sample240527-pb8a2abb7y
SHA256 84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b
MD5 5b1fbe4b0aee478517ad6861c07c2b7d
SHA1 c0794f2742386e8359cb0747be90a4af00d9989f
SHA512 31925f3711173f563609b2603fc3fe6f05a54aaba584574b949027779c75e89a88ee744063bf92f5fe59706f836413fd8fe762aecf91c8332f7da0c619d6eb28
SSDEEP 12288:1ds8eto+uT16CHafhZJiGEEkmWs8SzQ3wboz49nmAuf5DpG:1dTRHUhbiGEEkh3wueId
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/4796-3-0x0000000003DE0000-0x0000000003EFB000-memory.dmp	family_djvu
behavioral2/memory/2272-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2272-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2272-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2272-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2272-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-37-0x0000000000400000-0x0000000000537000-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
4588	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e5837ce1-67d5-491c-ab8a-f29925320d36\\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe\" --AutoStart"	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.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
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4796 set thread context of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4396 set thread context of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83

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
2272	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
2272	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
4488	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
4488	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 4796 wrote to memory of 2272	4796	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	78
PID 2272 wrote to memory of 4588	2272	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	79
PID 2272 wrote to memory of 4588	2272	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	79
PID 2272 wrote to memory of 4588	2272	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	79
PID 2272 wrote to memory of 4396	2272	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	80
PID 2272 wrote to memory of 4396	2272	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	80
PID 2272 wrote to memory of 4396	2272	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	80
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83
PID 4396 wrote to memory of 4488	4396	84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe	83

C:\Users\Admin\AppData\Local\Temp\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
"C:\Users\Admin\AppData\Local\Temp\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Users\Admin\AppData\Local\Temp\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
  "C:\Users\Admin\AppData\Local\Temp\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2272
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e5837ce1-67d5-491c-ab8a-f29925320d36" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4588
- - C:\Users\Admin\AppData\Local\Temp\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
    "C:\Users\Admin\AppData\Local\Temp\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4396
  - - C:\Users\Admin\AppData\Local\Temp\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
      "C:\Users\Admin\AppData\Local\Temp\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4488

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 990697f2eed9d44971a4eaeec7c0ddd2822c683683bec33dff51ac1fcc07b059
MD5 2b79576931f7278028f9fcc700d932d2
SHA1 84f199382ad7efa564324e559dd9d0586d518fd7
SHA512 1aaef7b8a3e8e5e9dbcca8daadef4951b1467d76c4a3cfb39328c5dc21431bf68bfb1660ba403a755504e2611f864a27847a08a5d3dd6b63c7489d230f99ec24
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 7bf8f1158b1d5d7574170918ebb2999aec893daaf951dfd99f1553d5d3d6cd6d
MD5 ddb38f5d22fa2184e1e73f28a1ba7a58
SHA1 0b5cf96f4426147e8fc811212cf8e80034ec7636
SHA512 8c264e825009c8ee385927a21408bd4a596a7e3e7b5eda3b24421ffa302bab60b2de925c85874cdcc1e7bcf9c3805171248644b51429b1154221db67ba26d161
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 b6da799ffeb7e9e0a744f2a7451df5a9f819ac5531fd2e6deadbbb7f60ea0562
MD5 07b8a2072cfb009f6d2046882d747d71
SHA1 c48a445870a5c412c8e7fe02182abffe8ea6d6fd
SHA512 7321eb16d1a082ce9dfb0908267cd5ec97ef8b2ce5c0afcb5b85db1e9386fdfcde02360a5a28a352057a709d402ea9015436e7b19de7b60c1fe29a0bb73ecbcb
MD5 SHA1 SHA512

Submit Download

84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe

Path C:\Users\Admin\AppData\Local\e5837ce1-67d5-491c-ab8a-f29925320d36\84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b.exe
Size 771KB
SHA256 84f0c084ee4811314c77a86d8fe33dbdcb749fa54e2bd8509376fa9b4568ae6b
MD5 5b1fbe4b0aee478517ad6861c07c2b7d
SHA1 c0794f2742386e8359cb0747be90a4af00d9989f
SHA512 31925f3711173f563609b2603fc3fe6f05a54aaba584574b949027779c75e89a88ee744063bf92f5fe59706f836413fd8fe762aecf91c8332f7da0c619d6eb28
SSDEEP 12288:1ds8eto+uT16CHafhZJiGEEkmWs8SzQ3wboz49nmAuf5DpG:1dTRHUhbiGEEkh3wueId
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2272-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2272-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2272-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2272-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2272-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4796-3-0x0000000003DE0000-0x0000000003EFB000-memory.dmp

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memory/4796-1-0x0000000002360000-0x00000000023FD000-memory.dmp

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