djvu | e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4

Analysis

max time kernel
146s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
27/05/2024, 15:31

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General

Target
e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
Size 770KB
Sample240527-sx9b1aaa72
SHA256 e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4
MD5 2a948e2c7117086ac37b7fc465e1ffe8
SHA1 7da08e575a34e4ec4c9c7fe2b9d708af180fa0cf
SHA512 d9ba30ea2072c26e456fa5b50f3a4b490683d52786cd0b57b5039fa2e2eb0e9759a27af606f5ebb53f789c5be59248021dea78a3b5d84bf5b6ddf76f544a8560
SSDEEP 12288:ArLKtosaP04SS0vPiF66BxVpil1x0y00N5oiK7IOo7PD6Q0ZKWIdXT4:AKtdas4APiU0V01x0y0047I7RuK1dX
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/1188-2-0x0000000003E20000-0x0000000003F3B000-memory.dmp	family_djvu
behavioral2/memory/3712-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1896-38-0x0000000000400000-0x0000000000537000-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
5060	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-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\010e8e61-6b6d-469b-bbf8-1fc661ff7f52\\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe\" --AutoStart"	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.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 1188 set thread context of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 2160 set thread context of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86

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
3712	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
3712	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
1896	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
1896	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 1188 wrote to memory of 3712	1188	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	79
PID 3712 wrote to memory of 5060	3712	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	81
PID 3712 wrote to memory of 5060	3712	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	81
PID 3712 wrote to memory of 5060	3712	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	81
PID 3712 wrote to memory of 2160	3712	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	82
PID 3712 wrote to memory of 2160	3712	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	82
PID 3712 wrote to memory of 2160	3712	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	82
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86
PID 2160 wrote to memory of 1896	2160	e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe	86

C:\Users\Admin\AppData\Local\Temp\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
"C:\Users\Admin\AppData\Local\Temp\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1188
- C:\Users\Admin\AppData\Local\Temp\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
  "C:\Users\Admin\AppData\Local\Temp\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3712
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\010e8e61-6b6d-469b-bbf8-1fc661ff7f52" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5060
- - C:\Users\Admin\AppData\Local\Temp\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
    "C:\Users\Admin\AppData\Local\Temp\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2160
  - - C:\Users\Admin\AppData\Local\Temp\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
      "C:\Users\Admin\AppData\Local\Temp\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1896

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 21406e1797be98cc32f7bf224291e492a01dc8bc8141e43575b71e3255498872
MD5 2d605af38c49a368b771cee709875489
SHA1 2a2ac6ce39db2439523b6a5dcc2470191aa0369b
SHA512 534a97ede7e97dfe4292a2c8f66680fee8173b394596bdcb5456c97b775a208833d16938cbe467cae13b91c38227b59df76f83f60e1eca25da2fa7e164b7c8bf
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 12f0139551ba0995266a2ed5e3dc985f706939ada13c69af40c4297b51a09741
MD5 d25b2d9950ebdb6c40454ff7ec0dbaf8
SHA1 b1b66d1cc7f4f394a5a87f36b506d7ceec4c7c67
SHA512 91f760db0b716aea5cdefca0bd73768625b54b0af8d0c27a971b49b082e1d637faa2d9f25d327f0483b0045f2f461c4bdaec1c73853d98c41047024ea4feac46
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 9b14b622d360238edc680e99e1fc653b1c656c69d47a763db5d5c305599b9930
MD5 891f3bd0059217d9abb1c35e05fb2792
SHA1 8f83fb5fdcf05a7a240d408339c99db41335f9a2
SHA512 3191525490fbf2bef24c3d52bee3970a14125850fb51893e59c254fff7ed82a286d99ebfd2843d2440d968332e82f15c002e4f40584f764c5199e06ae89023dc
MD5 SHA1 SHA512

Submit Download

e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe

Path C:\Users\Admin\AppData\Local\010e8e61-6b6d-469b-bbf8-1fc661ff7f52\e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4.exe
Size 770KB
SHA256 e28310ce177923abe9828ed58bc96715a142122859cb4e8faa48f4939340aed4
MD5 2a948e2c7117086ac37b7fc465e1ffe8
SHA1 7da08e575a34e4ec4c9c7fe2b9d708af180fa0cf
SHA512 d9ba30ea2072c26e456fa5b50f3a4b490683d52786cd0b57b5039fa2e2eb0e9759a27af606f5ebb53f789c5be59248021dea78a3b5d84bf5b6ddf76f544a8560
SSDEEP 12288:ArLKtosaP04SS0vPiF66BxVpil1x0y00N5oiK7IOo7PD6Q0ZKWIdXT4:AKtdas4APiU0V01x0y0047I7RuK1dX
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1188-2-0x0000000003E20000-0x0000000003F3B000-memory.dmp

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memory/1188-31-0x00000000022E0000-0x0000000002372000-memory.dmp

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memory/1188-1-0x00000000022E0000-0x0000000002372000-memory.dmp

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memory/1896-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1896-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-19-0x0000000000400000-0x0000000000537000-memory.dmp

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