djvu | c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166

Analysis

max time kernel
143s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
22/05/2024, 04:41

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General

Target
c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
Size 783KB
Sample240522-fa3jqace2w
SHA256 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166
MD5 5fbc11643953158e26571772a8edc74a
SHA1 94fedc97feb2d2df2745c6fcd5501a1a114a0d75
SHA512 6b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988
SSDEEP 12288:8oIZKVz6wlKt08bkEeQvl0huevWm5A/oKwUaRKI4Aq66k17rp/Bl00iG6+G:F2Khc0CyT55A/oKva8I4G6kDZi
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/3388-2-0x00000000041E0000-0x00000000042FB000-memory.dmp	family_djvu
behavioral2/memory/3376-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3376-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3376-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3376-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3376-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2884-37-0x0000000000400000-0x0000000000537000-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
872	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1c9b8368-48de-4dac-85c9-b0665178a4c7\\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe\" --AutoStart"	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.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
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3388 set thread context of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 1748 set thread context of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85

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
3376	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
3376	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
2884	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
2884	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3388 wrote to memory of 3376	3388	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	79
PID 3376 wrote to memory of 872	3376	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	81
PID 3376 wrote to memory of 872	3376	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	81
PID 3376 wrote to memory of 872	3376	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	81
PID 3376 wrote to memory of 1748	3376	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	82
PID 3376 wrote to memory of 1748	3376	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	82
PID 3376 wrote to memory of 1748	3376	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	82
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85
PID 1748 wrote to memory of 2884	1748	c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe	85

C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
"C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3388
- C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
  "C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3376
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\1c9b8368-48de-4dac-85c9-b0665178a4c7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:872
- - C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
    "C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1748
  - - C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
      "C:\Users\Admin\AppData\Local\Temp\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2884

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 be648ee93df285417e494e28c01e3ab8f3d043845f4d3b397dfd137d187ed612
MD5 cb35bd9d6c5a4fd50a9263018bbd9784
SHA1 efec24f93d2af7bd01969c36870ebc928fa6c790
SHA512 ac26182fb167458da4b465b118720470859e8028db8d3d71ddbe0c5be0e46b9178c5f7ccb8b1252c38754e27da1af546f8d2f6e32e1bfcbeac0d510aa831bf11
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 febc399223fad9e1b6ed690ebe475a0be6ce6a81ec33cc20309423172dd699f3
MD5 a9a8c36c44644f018a47c8bdae5a7cd3
SHA1 1e74376993a8a56021777d3055d00e6aa388ceac
SHA512 c0e2840105b97c63876eac1a89bd87de27ae5bf72858bd6036af11389b6b3e82c7834de57f3f6fab562a213c620e97c8158dce0018ee1b8a0edf6243ebe34da4
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 14be27f4bf40b10eba86e835e4faf74d57a578a68dd82822697dd8c2a72f7d1b
MD5 58af5cfaa624d78612e5fbddf1e1d664
SHA1 785024b87055ca6338b4280ba27bf2a1caa1ac07
SHA512 8f024b4e799e5a9b896aba982a5bd07b159e72529e7c640836c7d8fe4a6d8561bc0148941c6596f3a15c4b8c496083133f32ada39fead80080934d5cf64634b9
MD5 SHA1 SHA512

Submit Download

c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe

Path C:\Users\Admin\AppData\Local\1c9b8368-48de-4dac-85c9-b0665178a4c7\c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166.exe
Size 783KB
SHA256 c7407b303953b654dc577f4b7d198f760fc511827c8ec9e5474eb6e811932166
MD5 5fbc11643953158e26571772a8edc74a
SHA1 94fedc97feb2d2df2745c6fcd5501a1a114a0d75
SHA512 6b7f54e3a520aea87838d0b1185504b20d265ff53e7e4a7c8177f4da660fd308aab220489b0a833b41cb76d3b637834ed3a987265aee56251dfc3f6d3fb4a988
SSDEEP 12288:8oIZKVz6wlKt08bkEeQvl0huevWm5A/oKwUaRKI4Aq66k17rp/Bl00iG6+G:F2Khc0CyT55A/oKva8I4G6kDZi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2884-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2884-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2884-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2884-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2884-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2884-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2884-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2884-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2884-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3376-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3376-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3376-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3376-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3376-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3388-2-0x00000000041E0000-0x00000000042FB000-memory.dmp

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memory/3388-1-0x0000000002700000-0x00000000027A1000-memory.dmp

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