djvu | 843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff

Analysis

max time kernel
143s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
22/04/2024, 03:43

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General

Target
843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
Size 757KB
Sample240422-eadd6afd3t
SHA256 843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff
MD5 266f03fc3ed2d43e34e8d8b3c3786ba7
SHA1 4f9f62d103ca89b2c0bc04ed3a522909bf2c2b56
SHA512 d243a336d8cad0d7667675130d5531d9213e48854afc21152e202a89c8e3648a4de91ebc4af009d0f1a0f781cbd9d9242fb17e27f56777269c51c0d5aa402f72
SSDEEP 12288:PTw0ykKfzGeNJz+71vTXnMyJIObs9qijyx/71PkNb5DeH5qWj3hMPfQ7iNJ:fgzFJCZX1Jxvij6hk956N1MA7U
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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 17 IoCs

resource	yara_rule
behavioral2/memory/2992-2-0x00000000046E0000-0x00000000047FB000-memory.dmp	family_djvu
behavioral2/memory/2852-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2852-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2852-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2852-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2852-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2720-39-0x0000000000400000-0x0000000000537000-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
3528	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-1-5-21-3777591257-2471171023-3629228286-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\065430b6-2b96-4466-b903-01f0a0283467\\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe\" --AutoStart"	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.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 2992 set thread context of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 808 set thread context of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.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
2852	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
2852	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
2720	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
2720	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2992 wrote to memory of 2852	2992	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	78
PID 2852 wrote to memory of 3528	2852	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	79
PID 2852 wrote to memory of 3528	2852	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	79
PID 2852 wrote to memory of 3528	2852	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	79
PID 2852 wrote to memory of 808	2852	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	80
PID 2852 wrote to memory of 808	2852	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	80
PID 2852 wrote to memory of 808	2852	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	80
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83
PID 808 wrote to memory of 2720	808	843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe	83

C:\Users\Admin\AppData\Local\Temp\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
"C:\Users\Admin\AppData\Local\Temp\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Users\Admin\AppData\Local\Temp\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
  "C:\Users\Admin\AppData\Local\Temp\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2852
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\065430b6-2b96-4466-b903-01f0a0283467" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3528
- - C:\Users\Admin\AppData\Local\Temp\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
    "C:\Users\Admin\AppData\Local\Temp\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:808
  - - C:\Users\Admin\AppData\Local\Temp\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
      "C:\Users\Admin\AppData\Local\Temp\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2720

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 26931f7fea693117d081b190db0a9430d99b09475924258663d85cf43bed5ce7
MD5 fdfddca278b6963f292a46d9a61d7103
SHA1 a6466529832207b33f8f2ba85ebf39994159c046
SHA512 b6ec1eee12bea3d248eed0c1f1bbf676f1884b5043af7f699ee76b03ecf875d311a9ff9e217064ba830bd8b1a0badf456a09c4693eaabcdad8ae62e8fc8141de
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 34ee8807dfe09070d9b12ab610890e82cc0106ab16d27697b4808b42227653f1
MD5 b4489920f173d936eb55f9ab6f009b9a
SHA1 8dd1ee9e01cebee8451ec82c0a6d0ede7143fcdb
SHA512 f7fcd6bf3334917afc724977b8db4b094c342615c331ee2eacbbc0b4a2f3ec6e772d48dec4e3843cf5d763d39df84a31f12a7e7a50da981f3e317220095e52b3
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 2d057a0393be12935642644397f752c0c44b59732a1d5e5b5e3b490c122fe496
MD5 037e11620a012186ae17d022daee6fbf
SHA1 e58a2bd81a35958037f81b2c78a22a8683905682
SHA512 6ed4ae29b9cf6a0eadfa9ef5731e8423479b5d61984e02519f39ecfb78ccf04e152051d8481db0294f57d5ac7c06faf6c1fb9485c595b696a7b9dd8a678da079
MD5 SHA1 SHA512

Submit Download

843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe

Path C:\Users\Admin\AppData\Local\065430b6-2b96-4466-b903-01f0a0283467\843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff.exe
Size 757KB
SHA256 843ec923f92cd426a3a608aa06fd8be47efce42841472b36bab10968286184ff
MD5 266f03fc3ed2d43e34e8d8b3c3786ba7
SHA1 4f9f62d103ca89b2c0bc04ed3a522909bf2c2b56
SHA512 d243a336d8cad0d7667675130d5531d9213e48854afc21152e202a89c8e3648a4de91ebc4af009d0f1a0f781cbd9d9242fb17e27f56777269c51c0d5aa402f72
SSDEEP 12288:PTw0ykKfzGeNJz+71vTXnMyJIObs9qijyx/71PkNb5DeH5qWj3hMPfQ7iNJ:fgzFJCZX1Jxvij6hk956N1MA7U
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/808-20-0x00000000044E0000-0x0000000004581000-memory.dmp

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memory/2720-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2720-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2852-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2852-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2852-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2852-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2852-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2992-2-0x00000000046E0000-0x00000000047FB000-memory.dmp

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memory/2992-1-0x0000000004640000-0x00000000046DD000-memory.dmp

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