djvu | 7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619

Analysis

max time kernel
145s
max time network
129s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
29/04/2024, 12:30

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General

Target
7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
Size 702KB
Sample240429-pppe3sae47
SHA256 7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619
MD5 4ad521b079090890c47c749f818987aa
SHA1 9e6ab24c01b81e03a732634cea43a0af9b434ef3
SHA512 b78c5023a1eea455d331ba6f90d068eb4e74850092f026a3bafd8464df6178bc0ff73f2ca2b1e5a3ba42d259c1942b28e3d799088cf2eb807d465e0a56786875
SSDEEP 12288:m9VWr44oHJ6yJJk/xjnb/xtFSceFSzcatSeGz3ZewNKu8hFHVoyQGVDNq1TP65:Ky44oJVJJkxbpev4YaoeG7ZzNKuiFHVO
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/4076-2-0x0000000004960000-0x0000000004A7B000-memory.dmp	family_djvu
behavioral2/memory/4316-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4316-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4316-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4316-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4316-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-37-0x0000000000400000-0x0000000000537000-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
4804	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-1-5-21-1856190483-1022094809-400023910-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8decfc31-45f4-4bc7-9ffe-2ef7ec45bf0d\\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe\" --AutoStart"	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.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 4076 set thread context of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 3276 set thread context of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85

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
4316	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
4316	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
5024	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
5024	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4076 wrote to memory of 4316	4076	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	80
PID 4316 wrote to memory of 4804	4316	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	81
PID 4316 wrote to memory of 4804	4316	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	81
PID 4316 wrote to memory of 4804	4316	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	81
PID 4316 wrote to memory of 3276	4316	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	82
PID 4316 wrote to memory of 3276	4316	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	82
PID 4316 wrote to memory of 3276	4316	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	82
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85
PID 3276 wrote to memory of 5024	3276	7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe	85

C:\Users\Admin\AppData\Local\Temp\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
"C:\Users\Admin\AppData\Local\Temp\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4076
- C:\Users\Admin\AppData\Local\Temp\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
  "C:\Users\Admin\AppData\Local\Temp\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4316
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8decfc31-45f4-4bc7-9ffe-2ef7ec45bf0d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4804
- - C:\Users\Admin\AppData\Local\Temp\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
    "C:\Users\Admin\AppData\Local\Temp\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3276
  - - C:\Users\Admin\AppData\Local\Temp\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
      "C:\Users\Admin\AppData\Local\Temp\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:5024

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 74d05b10effcfa16da7e8b9c960089aba0441b43353e1590053fb01d223bec70
MD5 a7745cbb566c998321f31006901ef5a8
SHA1 88c32567cebf6adb46cad4f703e38b9faf883e7f
SHA512 0b4e4f3dc1f5fe4b9d2d44a16bb97ce2e8060790d6b3395186b6260255464d5d9f235f3e5c85a3fd3a33315aee7607e0672ab1393c70c96bead748d1e850cece
MD5 SHA1 SHA512

Submit Download

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 3fe6399338356486dffe7d640e32b578871d3566a2dc5dbd58b0b4bb7b818c7b
MD5 450fcb99167ceb0fda25b3e05fddfbb9
SHA1 e11f47662c124ee508977f0b7bebc2a2e22e54ca
SHA512 a282568056f9ce6b9411535d7d9aedd320bd4850034607446dec8f0f2373ba4287f8e24eb4a63b1a5e5d63ffb8ed3b55b5d33fc61523018a5d1b108b5e746412
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 8907e24633c76314e9e3f08bf47a684b90477f4ff932e015c9fa93f46810f5b3
MD5 9d774c82df02f6317fe24361f1cd50d0
SHA1 b2ecf7fd2f83e549e857f06564df9b1d681011aa
SHA512 f84a2be1f9ed146589f8a1100582675a5ab7f5c5391e67bb3f13c6c2e99caee24d25cc455f87c59f2da5e106fe4e051c5c62daef3fe99170a739bf5def21ad3a
MD5 SHA1 SHA512

Submit Download

7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe

Path C:\Users\Admin\AppData\Local\8decfc31-45f4-4bc7-9ffe-2ef7ec45bf0d\7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619.exe
Size 702KB
SHA256 7caa30ecbf924100845e6c6a34552fdef4ee814b339bf656c57690fe7ac2a619
MD5 4ad521b079090890c47c749f818987aa
SHA1 9e6ab24c01b81e03a732634cea43a0af9b434ef3
SHA512 b78c5023a1eea455d331ba6f90d068eb4e74850092f026a3bafd8464df6178bc0ff73f2ca2b1e5a3ba42d259c1942b28e3d799088cf2eb807d465e0a56786875
SSDEEP 12288:m9VWr44oHJ6yJJk/xjnb/xtFSceFSzcatSeGz3ZewNKu8hFHVoyQGVDNq1TP65:Ky44oJVJJkxbpev4YaoeG7ZzNKuiFHVO
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4076-2-0x0000000004960000-0x0000000004A7B000-memory.dmp

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memory/4076-1-0x0000000003120000-0x00000000031B4000-memory.dmp

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memory/4316-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4316-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4316-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4316-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4316-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-37-0x0000000000400000-0x0000000000537000-memory.dmp

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