djvu | cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525

Analysis

max time kernel
299s
max time network
299s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
03/05/2024, 22:34

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General

Target
cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
Size 790KB
Sample240503-2hkvjaba68
SHA256 cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525
MD5 070c929d197872964e6376ffc396d799
SHA1 981e91f07a3ccb862aff88ccc27e89002c871334
SHA512 0a86709a67bf486a6ff23bc654c8130d46aa4f339e4b739a71d4a5dd5dc7c2948d11ae427674b851e13798e76ee7bc5890feebcbfc8d5501972e50a4147efcba
SSDEEP 12288:wYvYBpes8TulVC/lLdLmUcHMM0+eMxbL6f1Ga4Irwf:aBYuPo1oUGf0IHaMa4l
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgzq
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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/4644-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4604-4-0x00000000048F0000-0x0000000004A0B000-memory.dmp	family_djvu
behavioral2/memory/4644-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4644-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4644-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4644-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4736-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4736-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4736-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4736-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4736-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4736-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4736-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4736-36-0x0000000000400000-0x0000000000537000-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
2624	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-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4c3b614f-d8e3-4fcf-b781-d9e071711312\\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe\" --AutoStart"	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.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
12	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4604 set thread context of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 3576 set thread context of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77

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
4644	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
4644	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
4736	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
4736	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4604 wrote to memory of 4644	4604	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 4644 wrote to memory of 2624	4644	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	74
PID 4644 wrote to memory of 2624	4644	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	74
PID 4644 wrote to memory of 2624	4644	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	74
PID 4644 wrote to memory of 3576	4644	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	75
PID 4644 wrote to memory of 3576	4644	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	75
PID 4644 wrote to memory of 3576	4644	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	75
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 3576 wrote to memory of 4736	3576	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77

C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
"C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4604
- C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
  "C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4644
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4c3b614f-d8e3-4fcf-b781-d9e071711312" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2624
- - C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
    "C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3576
  - - C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
      "C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4736

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 3288e6f724771438fe8227bb403d055e9394a1bf75d4e2352064e7aed8b7cdaf
MD5 3a0cd3d51fefef44420acbb85bffe07a
SHA1 e726fad0f51c4a79292e6d411875a04a071214cd
SHA512 ba144b4be1adcd5d7d6039b80310ddbeb01d15aa7f32844226f9a56dc9f4391ae68846fa57123d8b04e638d497c482e7e5c94eedea900f38fc52df052bd08a30
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 717949cfabcaefad7c38d3ab67fbb0dd68677fb5bdcbe9462b9b76940fd4df1e
MD5 878aa2eb6696094730b7f28eb8762107
SHA1 f5f75044e53a73f41308a739796d31fb91ca9067
SHA512 1a1622ca1e3061c18bb427d14094e41b4ec20a7673d931f2e2f624eae5dbe3edbfe38d23b314dbd4d98d34f892773f87cfd11a69d6fc39e4689e37bb3c8ff4ff
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 a881b036f25d583b14f5dd6265458b4d4257f18e10677d84e8542ec4a3f7f5ec
MD5 2d1ef9d80e2c30ef58e2ad3090ef9f0a
SHA1 d010255c96fa3e0b79cde0bafb0cc3278489a03d
SHA512 a0d4617a9b58bb50eb38fef4b9a117c2905b5cd33b401dc098335ccc2d36c0e5597ed6b8d77551b2f1de65c86ab588262010cc5fb18a7e56340fdfa1b5e30591
MD5 SHA1 SHA512

Submit Download

cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe

Path C:\Users\Admin\AppData\Local\4c3b614f-d8e3-4fcf-b781-d9e071711312\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
Size 790KB
SHA256 cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525
MD5 070c929d197872964e6376ffc396d799
SHA1 981e91f07a3ccb862aff88ccc27e89002c871334
SHA512 0a86709a67bf486a6ff23bc654c8130d46aa4f339e4b739a71d4a5dd5dc7c2948d11ae427674b851e13798e76ee7bc5890feebcbfc8d5501972e50a4147efcba
SSDEEP 12288:wYvYBpes8TulVC/lLdLmUcHMM0+eMxbL6f1Ga4Irwf:aBYuPo1oUGf0IHaMa4l
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4604-3-0x00000000030B0000-0x000000000314B000-memory.dmp

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memory/4604-4-0x00000000048F0000-0x0000000004A0B000-memory.dmp

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memory/4644-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4644-1-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4644-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4644-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4644-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4736-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4736-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4736-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4736-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4736-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4736-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4736-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4736-36-0x0000000000400000-0x0000000000537000-memory.dmp

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