djvu | 5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e

Analysis

max time kernel
143s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
20/05/2024, 12:34

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General

Target
5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
Size 727KB
Sample240520-pr7dnsbf8y
SHA256 5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e
MD5 c4172edef326fd136d095e8dcc9604d8
SHA1 50969ba8713726b3cb0c70f88377476ecae69755
SHA512 62613aa4063e1ca6fad20970e4d19519c6fe85cfa1833f4d9752c1d40a31a21c95a216f4a4e06a260177b4d44b8896322cfaf169726ab626c8576db062c3fb81
SSDEEP 12288:Cmmzqzn6XBLwMr7RWxlwag70lrCKRB6QafM4Fyk9oa80cEQEvPBqkH6tc0Bpq0:2XFpuGT7yhRB6QX45XdQkz6cwq0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vepi
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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/3288-2-0x00000000022A0000-0x00000000023BB000-memory.dmp	family_djvu
behavioral2/memory/4540-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4540-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4540-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4540-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4540-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1460-41-0x0000000000400000-0x0000000000537000-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
5016	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-1-5-21-3062789476-783164490-2318012559-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f6728d64-d25b-4104-82f8-16cb991508ad\\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe\" --AutoStart"	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.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 3288 set thread context of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 760 set thread context of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83

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
4540	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
4540	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
1460	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
1460	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 3288 wrote to memory of 4540	3288	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	78
PID 4540 wrote to memory of 5016	4540	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	79
PID 4540 wrote to memory of 5016	4540	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	79
PID 4540 wrote to memory of 5016	4540	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	79
PID 4540 wrote to memory of 760	4540	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	80
PID 4540 wrote to memory of 760	4540	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	80
PID 4540 wrote to memory of 760	4540	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	80
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83
PID 760 wrote to memory of 1460	760	5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe	83

C:\Users\Admin\AppData\Local\Temp\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
"C:\Users\Admin\AppData\Local\Temp\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3288
- C:\Users\Admin\AppData\Local\Temp\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
  "C:\Users\Admin\AppData\Local\Temp\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4540
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f6728d64-d25b-4104-82f8-16cb991508ad" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5016
- - C:\Users\Admin\AppData\Local\Temp\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
    "C:\Users\Admin\AppData\Local\Temp\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:760
  - - C:\Users\Admin\AppData\Local\Temp\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
      "C:\Users\Admin\AppData\Local\Temp\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1460

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 ab2d2c145ab00319ef5b1c4fe09623700a26c25fa009dc18bc3cde11c5bda0ec
MD5 4729bdc0e745b3293b606e2af8a3986f
SHA1 5c5bca22089d566d5f4e2836ea97026952ae1b1d
SHA512 381e495c91ce282e54940596b53998e152e196eb257853e3c0d97a3e4a26cbf7041cfcaf179ad213d93058aeee9987292dd2302a1219b23a2190aa898910466a
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 988e0c1cda10e511d61bc82aca54a4b3037a8a634390f584bf414c7af6e3edce
MD5 2f65a981798f2af20249ceaaf11b85ff
SHA1 94b2a79a5e75548d8674e2b3b1e22a6d2bbbce8b
SHA512 f873a8d806ea74baf0c119f106621d8fcda3d299a4c3c5102203d18fc8fb55c789f5bc24a46072cff21618d91ae8a056b706dcd0b7ed03b8868a688fa31867a1
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 d1881ee469914d46932ac161c04360e8c189ae13434285e87480df444da3f154
MD5 d5e9ff4b5fa5fd2e10457457fa2d9034
SHA1 dd13b74d7fb4241396fa39d5d36f5bf0ea3bb39f
SHA512 532a71168e1df8e6e1d1076529527e57aa1da63ab682fa4a0accc1cf365c6206e5b3490a0a23dcab79c96f11b94d4e600f76f4e6aedd7d3a606b816cb189aabd
MD5 SHA1 SHA512

Submit Download

5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe

Path C:\Users\Admin\AppData\Local\f6728d64-d25b-4104-82f8-16cb991508ad\5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e.exe
Size 727KB
SHA256 5eed1b7c0087418dfe4321bf9e31f07fb349e40f7752e2a384e11b0255d7eb1e
MD5 c4172edef326fd136d095e8dcc9604d8
SHA1 50969ba8713726b3cb0c70f88377476ecae69755
SHA512 62613aa4063e1ca6fad20970e4d19519c6fe85cfa1833f4d9752c1d40a31a21c95a216f4a4e06a260177b4d44b8896322cfaf169726ab626c8576db062c3fb81
SSDEEP 12288:Cmmzqzn6XBLwMr7RWxlwag70lrCKRB6QafM4Fyk9oa80cEQEvPBqkH6tc0Bpq0:2XFpuGT7yhRB6QX45XdQkz6cwq0
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/760-25-0x0000000000400000-0x00000000004FF000-memory.dmp

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memory/760-21-0x0000000000400000-0x00000000004FF000-memory.dmp

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memory/1460-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1460-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3288-2-0x00000000022A0000-0x00000000023BB000-memory.dmp

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memory/3288-1-0x0000000002200000-0x0000000002298000-memory.dmp

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memory/4540-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4540-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4540-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4540-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4540-5-0x0000000000400000-0x0000000000537000-memory.dmp

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