djvu | 3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440

Analysis

max time kernel
148s
max time network
153s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
28/05/2024, 12:21

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General

Target
3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
Size 816KB
Sample240528-pjdrdseb82
SHA256 3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440
MD5 3202e21270ae82c77637790c6d57f5ba
SHA1 2a920ddd808a6b0482c8f29766f19e22a4b2c42e
SHA512 7c456e655ebefbe45eb97b04faa1217c32fdc86da6da8f5a815bb2a94ded814194dae31a1e46ffe454df8d9ef6ab43cf21f43176758e134769c6ac4cf70c9bd2
SSDEEP 12288:qEOMuYK+E7CfWBBieK/1x4Pugx8FQEWdDab3LqoMECTnAIeYm0F7GtNXy7muJuDD:tfcNhK/1x/gcKgsnJkUqtNXjDv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/3032-2-0x0000000004AF0000-0x0000000004C0B000-memory.dmp	family_djvu
behavioral2/memory/3732-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3732-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3732-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3732-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3732-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-37-0x0000000000400000-0x0000000000537000-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
1472	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\\051b112e-c125-43e0-8e0c-966b0775c274\\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe\" --AutoStart"	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.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 3032 set thread context of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 2064 set thread context of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.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
3732	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
3732	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
4664	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
4664	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3032 wrote to memory of 3732	3032	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	78
PID 3732 wrote to memory of 1472	3732	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	79
PID 3732 wrote to memory of 1472	3732	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	79
PID 3732 wrote to memory of 1472	3732	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	79
PID 3732 wrote to memory of 2064	3732	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	80
PID 3732 wrote to memory of 2064	3732	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	80
PID 3732 wrote to memory of 2064	3732	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	80
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83
PID 2064 wrote to memory of 4664	2064	3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe	83

C:\Users\Admin\AppData\Local\Temp\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
"C:\Users\Admin\AppData\Local\Temp\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Users\Admin\AppData\Local\Temp\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
  "C:\Users\Admin\AppData\Local\Temp\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3732
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\051b112e-c125-43e0-8e0c-966b0775c274" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1472
- - C:\Users\Admin\AppData\Local\Temp\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
    "C:\Users\Admin\AppData\Local\Temp\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2064
  - - C:\Users\Admin\AppData\Local\Temp\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
      "C:\Users\Admin\AppData\Local\Temp\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4664

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 38185bd55754c319f0e381646cac1a4aeea31ee9a58ce47badc48df019b129d9
MD5 489a89b0a557696c6e623ab2079b74f7
SHA1 8775908130d6c010958c9ed6618e81708a17e411
SHA512 01af148c30a65ffa93e68741d3a71a6c5e59842cb328c426cd4661aeb7cc756452309feb54fbcd46efaeffb1fb060ec7858511ea16be7c8df255f24cff2e7a62
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 bf2b6d50028f80c5603588b9c45c6c614b42d3c64879f08776b98ba9f37a50a9
MD5 8c6b3b174017d5df3bf3e8aaeb5ab3a2
SHA1 9e95e098c48ef8126b6731b85e1a967bae6999ae
SHA512 e52cd2fca2b5c937b3e7e00b8ab30718efec00b51d9912d5c2acff49338cb7b36c9cdb58ff42f07864d5f77d8818fd09b7c10e20d79abd019d447a974817bd3b
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 524ed17b4ea4c7bb417172a207be77f1a61bc355dd49bebe0cb1cc96661d8b22
MD5 45c57008b26ac49b7f42e753bbaa20fc
SHA1 0e797bc3785c57ba9a7e78d4f121959b4bc1f065
SHA512 d414c885be61fd694075085136ec94386aab0fba7dc3601b78ca2a65fd24737fdb5e419767d00bb548e06ebf20f1d08035aa592f33dede3e2ee751b79f084a72
MD5 SHA1 SHA512

Submit Download

3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe

Path C:\Users\Admin\AppData\Local\051b112e-c125-43e0-8e0c-966b0775c274\3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440.exe
Size 816KB
SHA256 3ade289883264fef8c0fb26b8362dc68417cac936fd8e4bbb360738cba5e4440
MD5 3202e21270ae82c77637790c6d57f5ba
SHA1 2a920ddd808a6b0482c8f29766f19e22a4b2c42e
SHA512 7c456e655ebefbe45eb97b04faa1217c32fdc86da6da8f5a815bb2a94ded814194dae31a1e46ffe454df8d9ef6ab43cf21f43176758e134769c6ac4cf70c9bd2
SSDEEP 12288:qEOMuYK+E7CfWBBieK/1x4Pugx8FQEWdDab3LqoMECTnAIeYm0F7GtNXy7muJuDD:tfcNhK/1x/gcKgsnJkUqtNXjDv
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3032-2-0x0000000004AF0000-0x0000000004C0B000-memory.dmp

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memory/3032-1-0x0000000004A50000-0x0000000004AF0000-memory.dmp

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memory/3732-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3732-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3732-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3732-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3732-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-37-0x0000000000400000-0x0000000000537000-memory.dmp

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