djvu | 419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c

Analysis

max time kernel
143s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
26/04/2024, 09:53

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General

Target
419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
Size 796KB
Sample240426-lwpgwadh53
SHA256 419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c
MD5 8a2267a2de75c76f0a1e1b29db6eef84
SHA1 63adf350a3393d3fc94c889d3b4d2f109516045e
SHA512 c3e0f928ce89f39d3ef64305cc9895f6515192756ba629d94d8040e1ff84f28f7686a90eb38f9453903640f9e3fd0c600f97aa454be04ccd0e14c4438dccb361
SSDEEP 24576:dext8acBNHzPi/2hUKyVMgwcIA+B2noWhnrr:sxNXpBegwcaBRWhnrr
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/1480-2-0x0000000005EF0000-0x000000000600B000-memory.dmp	family_djvu
behavioral2/memory/3852-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3852-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3852-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3852-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3852-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4900-39-0x0000000000400000-0x0000000000537000-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
4764	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-1-5-21-3263309122-2820180308-3568046652-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d2a2fef8-fcf7-4539-9fff-ab9ae9529cad\\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe\" --AutoStart"	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.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
3	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1480 set thread context of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 4664 set thread context of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.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
3852	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
3852	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
4900	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
4900	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 1480 wrote to memory of 3852	1480	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	78
PID 3852 wrote to memory of 4764	3852	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	79
PID 3852 wrote to memory of 4764	3852	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	79
PID 3852 wrote to memory of 4764	3852	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	79
PID 3852 wrote to memory of 4664	3852	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	80
PID 3852 wrote to memory of 4664	3852	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	80
PID 3852 wrote to memory of 4664	3852	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	80
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83
PID 4664 wrote to memory of 4900	4664	419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe	83

C:\Users\Admin\AppData\Local\Temp\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
"C:\Users\Admin\AppData\Local\Temp\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1480
- C:\Users\Admin\AppData\Local\Temp\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
  "C:\Users\Admin\AppData\Local\Temp\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3852
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d2a2fef8-fcf7-4539-9fff-ab9ae9529cad" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4764
- - C:\Users\Admin\AppData\Local\Temp\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
    "C:\Users\Admin\AppData\Local\Temp\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4664
  - - C:\Users\Admin\AppData\Local\Temp\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
      "C:\Users\Admin\AppData\Local\Temp\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4900

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 5ef7675df551d2cc5b627da581d2393fea05a6117c87c430e74caa70c713f0e5
MD5 62157377b2466befda9ec988b5e1a19e
SHA1 fc3905dc5147971391252d875ae2c38cdc67dfdd
SHA512 fedf0a40d603f987e172ef8856f1ce73b7e853fa34276e6fb6b44cb92f00f23a97ab9399f5cec8205c1f6cb814af730e2b35cb688e404316fb4e82d080f9714e
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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 cc81b4038a662bbe74915ce0f66d84c9a179990af03ad12fcba3963e426e3458
MD5 ead0dfd5702e11a7a2f96bd5ebc91d34
SHA1 7b3580af328b3fcdec63a1959c898e3cef45cc09
SHA512 01c4f8df37e5eacb2ddf63773eb08b413c640b6552c3b1393a00b31e254c10228c6f1a52482de2c19fb846af8b6dd82fb90abf2d6745124d96d28c09a3d00436
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 7721249df07711137581ffda14e900155860dd59745cff31b178a4821067b80e
MD5 98888598d7c521714ad14a0649ee8bdf
SHA1 fac0db105216ebe69ab3dbc76efa832428a16d2f
SHA512 b33975c247c82644fd28f9574b0d9b7d94d2503869d06ce6676f633f71c456190d3aaa1415fb5d5c3b9c681119d8127d12cbf1c9c420f883e2ee28b8467764e3
MD5 SHA1 SHA512

Submit Download

419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe

Path C:\Users\Admin\AppData\Local\d2a2fef8-fcf7-4539-9fff-ab9ae9529cad\419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c.exe
Size 796KB
SHA256 419db909364452dcbc9aff856194a598a120e809324a11a4f2116e5d9aae0a7c
MD5 8a2267a2de75c76f0a1e1b29db6eef84
SHA1 63adf350a3393d3fc94c889d3b4d2f109516045e
SHA512 c3e0f928ce89f39d3ef64305cc9895f6515192756ba629d94d8040e1ff84f28f7686a90eb38f9453903640f9e3fd0c600f97aa454be04ccd0e14c4438dccb361
SSDEEP 24576:dext8acBNHzPi/2hUKyVMgwcIA+B2noWhnrr:sxNXpBegwcaBRWhnrr
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1480-1-0x0000000004290000-0x000000000432A000-memory.dmp

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memory/1480-2-0x0000000005EF0000-0x000000000600B000-memory.dmp

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memory/3852-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3852-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3852-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3852-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3852-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-20-0x0000000004420000-0x00000000044B3000-memory.dmp

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memory/4900-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4900-39-0x0000000000400000-0x0000000000537000-memory.dmp

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