djvu | 3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8

Analysis

max time kernel
146s
max time network
152s
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, 00:03

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General

Target
3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
Size 805KB
Sample240522-ab4khsed5w
SHA256 3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8
MD5 c809827be1c79e65c9dd86e78d7c53f1
SHA1 ba0403ea800d5b0e68888543f6ca0921f753ddd1
SHA512 ad47c68490b7c34b0ae8001d59071cbf1888de7bb72be29922dc0c3e1eea1624bc1a4dfd6481cc06281363c54d170bbfa37a43b1e720721b18b5813d23ad45c5
SSDEEP 12288:ofdavAM3xfGM4YJYFdxFQ09Lbl7Pq3/RSVAlGO+MUzE:+dazfGM4kYdFfLbl7PqUalZoI
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/4132-2-0x00000000041C0000-0x00000000042DB000-memory.dmp	family_djvu
behavioral2/memory/1696-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1696-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3292-37-0x0000000000400000-0x0000000000537000-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
792	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\\68c30bef-ea8c-43e6-9d87-e39d860b5d94\\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe\" --AutoStart"	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.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
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4132 set thread context of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 1512 set thread context of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.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
1696	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
1696	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
3292	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
3292	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 4132 wrote to memory of 1696	4132	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	80
PID 1696 wrote to memory of 792	1696	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	82
PID 1696 wrote to memory of 792	1696	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	82
PID 1696 wrote to memory of 792	1696	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	82
PID 1696 wrote to memory of 1512	1696	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	83
PID 1696 wrote to memory of 1512	1696	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	83
PID 1696 wrote to memory of 1512	1696	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	83
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86
PID 1512 wrote to memory of 3292	1512	3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe	86

C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
"C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4132
- C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
  "C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1696
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\68c30bef-ea8c-43e6-9d87-e39d860b5d94" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:792
- - C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
    "C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1512
  - - C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
      "C:\Users\Admin\AppData\Local\Temp\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3292

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 8dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3
MD5 a1d955617a4d146e70544d0d9a0390ca
SHA1 5ffdc4453b23e24a7cb0e634b26864c169f5257b
SHA512 0bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810
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 0adc0b994b1509aeec734e92f21f5c329aaec02fd7d56d403269df9a1caea6c4
MD5 fc645c046b61028ac135d6484834cb8f
SHA1 0f53da2cd7bd5b6b695f47ebefc6b1c698fe8019
SHA512 567f0a47bdc02fac646e1aef827c20c9346581337838dd3585f383aa764213fc627261d26b921bc24ab48d242abeb29235eba43b49cfaa2ed969d2b15237a13c
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 5251445e4ea5898e0729257f732a7739523d59abd1316f497162c52ad5d8ddb2
MD5 7a00c45f57b41d4648d4a405aeca7a8b
SHA1 b888be9f54e7b25cae3c695ede5c9d7b13dea882
SHA512 0f4e384b1df95ac59a53ba81bdb6bbc46114c2f4d3a89ecab0d16cf9d9888eb05fe15f53d5eb7b0e01c69b6ff21b7b4727537601020c713c4bfe0e61da63cd32
MD5 SHA1 SHA512

Submit Download

3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe

Path C:\Users\Admin\AppData\Local\68c30bef-ea8c-43e6-9d87-e39d860b5d94\3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8.exe
Size 805KB
SHA256 3d671617eb9309b57270ca90341af42a2512fda22a22b2b47d4b6060110aecd8
MD5 c809827be1c79e65c9dd86e78d7c53f1
SHA1 ba0403ea800d5b0e68888543f6ca0921f753ddd1
SHA512 ad47c68490b7c34b0ae8001d59071cbf1888de7bb72be29922dc0c3e1eea1624bc1a4dfd6481cc06281363c54d170bbfa37a43b1e720721b18b5813d23ad45c5
SSDEEP 12288:ofdavAM3xfGM4YJYFdxFQ09Lbl7Pq3/RSVAlGO+MUzE:+dazfGM4kYdFfLbl7PqUalZoI
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1696-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1696-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3292-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4132-1-0x00000000025D0000-0x0000000002670000-memory.dmp

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memory/4132-2-0x00000000041C0000-0x00000000042DB000-memory.dmp

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