djvu | 71b518e6e776d80715c01c181d7b99b75fc47d1bc291f4d70fdc9762fcd4bb94

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
24/02/2024, 09:46

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General

Target
a18edaac6f984409a79d5195ef2224c9.exe
Size 795KB
Sample240224-lrmgqagb47
SHA256 71b518e6e776d80715c01c181d7b99b75fc47d1bc291f4d70fdc9762fcd4bb94
MD5 a18edaac6f984409a79d5195ef2224c9
SHA1 565995b08ca2534f47350610d4ab006f6ca79947
SHA512 75ab17f7d59cc10cad91add18195b73762f89b055c9fa1b151311d8fc0872c4575ba228350af29d09f9b4e9a7542866d3800ddb16eb13866fae134fa6a648a1e
SSDEEP 24576:uo8zSOUYoOiU33GB8Uoyg5FhGsFtpP9jBtDeh2:JYoOia3Gnoy/svpFjBMA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://astdg.top/fhsgtsspen6/get.php

Attributes

extension
.hoop
offline_id
922IaqlBU1I6IKX6eTDABuH3amHHwoa5qUSb8vt1
payload_url
http://securebiz.org/dl/build2.exe

http://astdg.top/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. You can get and look video overview decrypt tool: https://we.tl/t-I6qIbIYiz9 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0326gDrgo

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2504-2-0x0000000002890000-0x00000000029AB000-memory.dmp	family_djvu
behavioral2/memory/1336-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1336-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5088-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation	a18edaac6f984409a79d5195ef2224c9.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3024	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-1-5-21-1712835645-2080934712-2142796781-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bded69c5-e244-46a2-a877-db36bb47c5c3\\a18edaac6f984409a79d5195ef2224c9.exe\" --AutoStart"	a18edaac6f984409a79d5195ef2224c9.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
14	api.2ip.ua
15	api.2ip.ua
36	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2504 set thread context of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 4068 set thread context of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95

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
1336	a18edaac6f984409a79d5195ef2224c9.exe
1336	a18edaac6f984409a79d5195ef2224c9.exe
5088	a18edaac6f984409a79d5195ef2224c9.exe
5088	a18edaac6f984409a79d5195ef2224c9.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 2504 wrote to memory of 1336	2504	a18edaac6f984409a79d5195ef2224c9.exe	91
PID 1336 wrote to memory of 3024	1336	a18edaac6f984409a79d5195ef2224c9.exe	92
PID 1336 wrote to memory of 3024	1336	a18edaac6f984409a79d5195ef2224c9.exe	92
PID 1336 wrote to memory of 3024	1336	a18edaac6f984409a79d5195ef2224c9.exe	92
PID 1336 wrote to memory of 4068	1336	a18edaac6f984409a79d5195ef2224c9.exe	93
PID 1336 wrote to memory of 4068	1336	a18edaac6f984409a79d5195ef2224c9.exe	93
PID 1336 wrote to memory of 4068	1336	a18edaac6f984409a79d5195ef2224c9.exe	93
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95
PID 4068 wrote to memory of 5088	4068	a18edaac6f984409a79d5195ef2224c9.exe	95

C:\Users\Admin\AppData\Local\Temp\a18edaac6f984409a79d5195ef2224c9.exe
"C:\Users\Admin\AppData\Local\Temp\a18edaac6f984409a79d5195ef2224c9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Users\Admin\AppData\Local\Temp\a18edaac6f984409a79d5195ef2224c9.exe
  "C:\Users\Admin\AppData\Local\Temp\a18edaac6f984409a79d5195ef2224c9.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1336
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\bded69c5-e244-46a2-a877-db36bb47c5c3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3024
- - C:\Users\Admin\AppData\Local\Temp\a18edaac6f984409a79d5195ef2224c9.exe
    "C:\Users\Admin\AppData\Local\Temp\a18edaac6f984409a79d5195ef2224c9.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4068
  - - C:\Users\Admin\AppData\Local\Temp\a18edaac6f984409a79d5195ef2224c9.exe
      "C:\Users\Admin\AppData\Local\Temp\a18edaac6f984409a79d5195ef2224c9.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:5088

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

Query Registry

T1012

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 c209f113aeb88e5bd96679ce477df1d94d15ba8eec514a0a2959448cb5491ea8
MD5 ec595eead4c696d69cc7e54cf7427b8c
SHA1 e4dd427bbdc246a8a3db0cf7e3c2e33bff548532
SHA512 1f8b130ba089c8b95a5675b4efbca6418897c24ecb62344f8d2e68dc9c65f1a4c1a5fdfec430987e3584ec237a4511fb13e316e266b4e901e4fb64701e5de5fc
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 afe3ccd9f5168723f7f2ee64ecba64f2de835dbdf88972044b500bde8252bd0a
MD5 781f849f0698728393df58ae32176839
SHA1 0fec6149c55632af78a1e34b476ccb390457051b
SHA512 4154bf70f1ce6b696340e84fd58a03fbdf5b0c121011732592a3cb4d4f8b5f0094bd8e57e37700b0ecf30a638af94947b6d401551dd83dbc724dec8b0c00116e
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 8344b9717078f426957505003c97edd08cb0564d2da121bc74b3138da826ba95
MD5 63d6262b05158de4f9fd20de16a11854
SHA1 eb5369df282cc602c91acea1eae0d7fe7cdeb4e7
SHA512 cb94478b769c952acb54803180550a9477107b33df9db11facdacab73ec3dc9457c757830945f69934fc36418ae707866344ea51bddf17be8756fb93a85aaac7
MD5 SHA1 SHA512

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a18edaac6f984409a79d5195ef2224c9.exe

Path C:\Users\Admin\AppData\Local\bded69c5-e244-46a2-a877-db36bb47c5c3\a18edaac6f984409a79d5195ef2224c9.exe
Size 795KB
SHA256 71b518e6e776d80715c01c181d7b99b75fc47d1bc291f4d70fdc9762fcd4bb94
MD5 a18edaac6f984409a79d5195ef2224c9
SHA1 565995b08ca2534f47350610d4ab006f6ca79947
SHA512 75ab17f7d59cc10cad91add18195b73762f89b055c9fa1b151311d8fc0872c4575ba228350af29d09f9b4e9a7542866d3800ddb16eb13866fae134fa6a648a1e
SSDEEP 24576:uo8zSOUYoOiU33GB8Uoyg5FhGsFtpP9jBtDeh2:JYoOia3Gnoy/svpFjBMA
MD5 SHA1 SHA512 SSDEEP

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memory/1336-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1336-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2504-1-0x00000000026E0000-0x000000000277A000-memory.dmp

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memory/2504-2-0x0000000002890000-0x00000000029AB000-memory.dmp

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memory/4068-18-0x00000000026C0000-0x000000000275B000-memory.dmp

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memory/5088-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5088-37-0x0000000000400000-0x0000000000537000-memory.dmp

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