djvu | d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87

Resubmissions

01/05/2024, 16:33

240501-t2ylqsde3610

01/05/2024, 16:27

240501-tydgdsbb3x10

Analysis

max time kernel
148s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
01/05/2024, 16:27

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General

Target
d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
Size 788KB
Sample240501-tydgdsbb3x
SHA256 d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87
MD5 c641ebe0860ec916c15348c0b66bb458
SHA1 d1bab1c3e79dccefc7da9e812288d0b5c9649c59
SHA512 b898ae8305ccb4bdfbb6f456c7bd442b1166a0347920e2356673ca4995f439c54e08c2242ddabd0493cab11e841ee4704aed2f4e93a6ccd5aa4e1d347a1b1d4f
SSDEEP 12288:mAO0pTRoaZ/6t4rYY85QHsVRfKm3+OAGzUKkCQy3Hv/f8O:mkpVp/jfvQAK+lGzUKkCQ2/3
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/236-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp	family_djvu
behavioral2/memory/4348-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4348-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4348-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4348-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4348-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3712-37-0x0000000000400000-0x0000000000537000-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
1012	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-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0d0a0d82-4fec-4b18-8a67-0a639e409819\\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe\" --AutoStart"	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.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
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 236 set thread context of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 1336 set thread context of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.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
4348	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
4348	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
3712	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
3712	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 236 wrote to memory of 4348	236	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	81
PID 4348 wrote to memory of 1012	4348	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	82
PID 4348 wrote to memory of 1012	4348	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	82
PID 4348 wrote to memory of 1012	4348	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	82
PID 4348 wrote to memory of 1336	4348	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	83
PID 4348 wrote to memory of 1336	4348	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	83
PID 4348 wrote to memory of 1336	4348	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	83
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86
PID 1336 wrote to memory of 3712	1336	d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe	86

C:\Users\Admin\AppData\Local\Temp\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
"C:\Users\Admin\AppData\Local\Temp\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:236
- C:\Users\Admin\AppData\Local\Temp\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
  "C:\Users\Admin\AppData\Local\Temp\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4348
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0d0a0d82-4fec-4b18-8a67-0a639e409819" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1012
- - C:\Users\Admin\AppData\Local\Temp\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
    "C:\Users\Admin\AppData\Local\Temp\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1336
  - - C:\Users\Admin\AppData\Local\Temp\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
      "C:\Users\Admin\AppData\Local\Temp\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3712

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 c37f6af3f2edb4df584a83758d6c4cb225c6727f5ef17f0e22eaf18b2437c94e
MD5 99a0d432fc76891e10101274130c11af
SHA1 ede5f93cc5e517dfcd3b4e0bfb4576fb68806817
SHA512 3be97294f3dd5470b9f8852865c8befcd540164b719c1e8045ba5e8cec2afb93d5a0bc04cadebc29a38ba1a030d48b206e1ea87ffd6b8cd1d7879cff9f91bb93
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 fbd4a468b14d1c45ff9741e001a78e8360635292fc9eca7f340e3d935e56e846
MD5 13d84b35cbe0f7a7fa62621b2e2a8abd
SHA1 c525b586da1b56e5338acf52dec83c416bc64d7a
SHA512 91475f3684f950a3a51ac0ba3fc3f4202a00136f282cb095b99ea19fd66437d1ad379cba57813d5ba5764b33b855281c42f25e9ed08a6139e12054dd27721b46
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 b7991e269bfb817a24e5875f2f21aa5de389f1a1ad6c8c1fbbcb0078578f5963
MD5 c8223c2596a2467500fa902c34fedc74
SHA1 53acdc989ec874b3f5c53d6442a9da7eeed93d15
SHA512 50fdf2170864ccbada0b872a506d985c24560b0e0212093f4651cd219d8de73ccfa78b933b958bab51615b5c09e51923ffe6fa8a9ae14043e91542f2ede1325d
MD5 SHA1 SHA512

Submit Download

d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe

Path C:\Users\Admin\AppData\Local\0d0a0d82-4fec-4b18-8a67-0a639e409819\d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87.exe
Size 788KB
SHA256 d8e513805340e6ebde9c9077b2294a88b595a793c37bdf8932cfd0f1df035a87
MD5 c641ebe0860ec916c15348c0b66bb458
SHA1 d1bab1c3e79dccefc7da9e812288d0b5c9649c59
SHA512 b898ae8305ccb4bdfbb6f456c7bd442b1166a0347920e2356673ca4995f439c54e08c2242ddabd0493cab11e841ee4704aed2f4e93a6ccd5aa4e1d347a1b1d4f
SSDEEP 12288:mAO0pTRoaZ/6t4rYY85QHsVRfKm3+OAGzUKkCQy3Hv/f8O:mkpVp/jfvQAK+lGzUKkCQ2/3
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/236-2-0x0000000004A00000-0x0000000004B1B000-memory.dmp

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memory/236-1-0x0000000003190000-0x000000000322B000-memory.dmp

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memory/3712-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3712-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4348-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4348-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4348-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4348-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4348-19-0x0000000000400000-0x0000000000537000-memory.dmp

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