djvu | d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8

Analysis

max time kernel
144s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
25/05/2024, 16:10

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General

Target
d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
Size 730KB
Sample240525-tmekbaab2v
SHA256 d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8
MD5 bcd18bf62d2ff2f57c6d7d5066460629
SHA1 18abd83784f6f4eeee4f3567a73e4c20e57bf566
SHA512 844e4a8fb79babb3ca734135db0d76f11a2cfa662c587f0458a000ab0531ecc3fe2daaafb8fac5fab309daf40c9be809d3b48661b8afbc5cb1e1f8fa6fecf63e
SSDEEP 12288:wkXhj8GLAOSo9xYkrTjSoDWDTI44NBXAkB8pff4wRym44lA+OColnxsUL5ruQM:FX+2BSoLD/miOI4IBXAjfHfZlodiUL5Q
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 15 IoCs

resource	yara_rule
behavioral2/memory/3904-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2764-3-0x0000000004B40000-0x0000000004C5B000-memory.dmp	family_djvu
behavioral2/memory/3904-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3904-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3904-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3904-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/964-37-0x0000000000400000-0x0000000000537000-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
2604	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-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0faf35e5-bd6c-4f19-9a73-f9661e9c912d\\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe\" --AutoStart"	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.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
7	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2764 set thread context of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 1772 set thread context of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.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
3904	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
3904	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
964	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
964	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 2764 wrote to memory of 3904	2764	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	78
PID 3904 wrote to memory of 2604	3904	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	79
PID 3904 wrote to memory of 2604	3904	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	79
PID 3904 wrote to memory of 2604	3904	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	79
PID 3904 wrote to memory of 1772	3904	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	80
PID 3904 wrote to memory of 1772	3904	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	80
PID 3904 wrote to memory of 1772	3904	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	80
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83
PID 1772 wrote to memory of 964	1772	d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe	83

C:\Users\Admin\AppData\Local\Temp\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
"C:\Users\Admin\AppData\Local\Temp\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Users\Admin\AppData\Local\Temp\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
  "C:\Users\Admin\AppData\Local\Temp\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3904
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0faf35e5-bd6c-4f19-9a73-f9661e9c912d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2604
- - C:\Users\Admin\AppData\Local\Temp\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
    "C:\Users\Admin\AppData\Local\Temp\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1772
  - - C:\Users\Admin\AppData\Local\Temp\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
      "C:\Users\Admin\AppData\Local\Temp\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:964

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 a8400cc21263f2c44ccb301a3a1ef66a1ff009fd4d301362fd778e7b23a386d8
MD5 8df6dedd4dd10eb8211463f82b129e29
SHA1 ffc6e51cf829b481d789d8e3e61f6c7096fbde3e
SHA512 25fd6d8684ff8db3d40a8fe33267fd01d6456a84f81c7e579f7508c36558cf731a0ec8a2999a539aa5c1985dc45f7bd20d2a14a343b2326030941858f24c57f4
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 6b021d12e3ec998cecde8b52012a88e71577c774d7f79e2384d8bca3e45f8565
MD5 3df6ebd5485c341249b0146a5c83243a
SHA1 74ca265a501faa8f8c2c39006def542b2d3ccc90
SHA512 8706d61a625e7904f326b42711af8bc89a45e13063149dcd75cd4a02a0e755b19253bebba8a7c27dd95a1636008c24fb491e512f67e7f5d2da8f9c1f561b25f9
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 43113e1315bc4f16cbc623f528c363c53303f70d2f1fa7fe451ec09169ffcecd
MD5 be56c9c1be58963dd109d47f77bc2ef7
SHA1 13e0a874fb2f6f74ff864e2842905f6e25428889
SHA512 a4001c7126b7b62081d6f01aeae097b808d6d2e96ce8b2efbeafe4539c133fdeb7c07fbee21d05830aca44f17c43362333c2be7f4bae2f3a85e78d60fbd85f93
MD5 SHA1 SHA512

Submit Download

d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe

Path C:\Users\Admin\AppData\Local\0faf35e5-bd6c-4f19-9a73-f9661e9c912d\d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8.exe
Size 730KB
SHA256 d0b89f08dcfb3b9005c5e446ff69e3f1b83196d77c1b8d865cdc4297b1a795f8
MD5 bcd18bf62d2ff2f57c6d7d5066460629
SHA1 18abd83784f6f4eeee4f3567a73e4c20e57bf566
SHA512 844e4a8fb79babb3ca734135db0d76f11a2cfa662c587f0458a000ab0531ecc3fe2daaafb8fac5fab309daf40c9be809d3b48661b8afbc5cb1e1f8fa6fecf63e
SSDEEP 12288:wkXhj8GLAOSo9xYkrTjSoDWDTI44NBXAkB8pff4wRym44lA+OColnxsUL5ruQM:FX+2BSoLD/miOI4IBXAjfHfZlodiUL5Q
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/964-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/964-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/964-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/964-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/964-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/964-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/964-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/964-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/964-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2764-3-0x0000000004B40000-0x0000000004C5B000-memory.dmp

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memory/2764-1-0x0000000004AA0000-0x0000000004B35000-memory.dmp

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memory/3904-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3904-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3904-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3904-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3904-19-0x0000000000400000-0x0000000000537000-memory.dmp

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