djvu | 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e

Analysis

max time kernel
141s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
22/05/2024, 00:01

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General

Target
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
Size 806KB
Sample240522-aa691sed3w
SHA256 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e
MD5 94ec3337ff55fbb90c9826771ee1a452
SHA1 92a37f78607bb102849ee65f6efce5902302a958
SHA512 be5f8de7734fde10771cf8567a4b41483bd9033c9ece6a8f92d584b181d7f43e87db22864d33e3cb1c562189dcd230e82e411bb966de9220b5bb8da2e3a89be4
SSDEEP 12288:YX00kQCEdfrJBMAZc5o35iKAO+N6yUemIC7JNJ5g0kYVSxcnG:el6AfXYy5iKAOsSICpSYVq
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/4360-2-0x00000000041A0000-0x00000000042BB000-memory.dmp	family_djvu
behavioral2/memory/4328-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4328-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4328-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4328-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4328-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-37-0x0000000000400000-0x0000000000537000-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
1792	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-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f53ff194-04c3-4dcf-b04f-701e28ccea19\\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe\" --AutoStart"	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.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
2	api.2ip.ua
13	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4360 set thread context of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 1312 set thread context of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.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
4328	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
4328	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
2956	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
2956	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4360 wrote to memory of 4328	4360	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	81
PID 4328 wrote to memory of 1792	4328	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	82
PID 4328 wrote to memory of 1792	4328	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	82
PID 4328 wrote to memory of 1792	4328	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	82
PID 4328 wrote to memory of 1312	4328	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	83
PID 4328 wrote to memory of 1312	4328	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	83
PID 4328 wrote to memory of 1312	4328	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	83
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86
PID 1312 wrote to memory of 2956	1312	434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe	86

C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
"C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4360
- C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
  "C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4328
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f53ff194-04c3-4dcf-b04f-701e28ccea19" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1792
- - C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
    "C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1312
  - - C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
      "C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2956

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 8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3
MD5 a1d955617a4d146e70544d0d9a0390ca
SHA1 5ffdc4453b23e24a7cb0e634b26864c169f5257b
SHA512 0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810
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 01566416c9c8d7a5f100c8bb0261eab06cb16ad97438086c31c53ad2bd80059c
MD5 8bca31f85ccbebe6b793afe5fe223059
SHA1 b5f9466693ed21a48b9f5fc6e270d95d3d27ef91
SHA512 f181eca72a2d407d714effc6827332c2565d8b7191a474e94eb85cc3a2d1f8137b873470d0df0faa1d31667fbb230fadd7fc2d4d78a4d0afe0fac1203ed83279
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 605f0858dc875b86606e3d052d764e9cdb1724052d0109234b56946a244827e4
MD5 f416017ded3d4b5cc38c940c13f26605
SHA1 0544209621585aee410c15ac7c38e7cb0f4dd758
SHA512 0f72f8d79f24e2338919aa99587f550d90675e079a220e6f3a726fd0252dff23f6f035d98ace7e5b2a677e334d7d2494f51f8dfc028226f5f01d01c65b249a7b
MD5 SHA1 SHA512

Submit Download

434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe

Path C:\Users\Admin\AppData\Local\f53ff194-04c3-4dcf-b04f-701e28ccea19\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
Size 806KB
SHA256 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e
MD5 94ec3337ff55fbb90c9826771ee1a452
SHA1 92a37f78607bb102849ee65f6efce5902302a958
SHA512 be5f8de7734fde10771cf8567a4b41483bd9033c9ece6a8f92d584b181d7f43e87db22864d33e3cb1c562189dcd230e82e411bb966de9220b5bb8da2e3a89be4
SSDEEP 12288:YX00kQCEdfrJBMAZc5o35iKAO+N6yUemIC7JNJ5g0kYVSxcnG:el6AfXYy5iKAOsSICpSYVq
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2956-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4328-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4328-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4328-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4328-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4328-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4360-1-0x00000000026D0000-0x000000000276A000-memory.dmp

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memory/4360-2-0x00000000041A0000-0x00000000042BB000-memory.dmp

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