djvu | c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642

Analysis

max time kernel
291s
max time network
298s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
07/05/2024, 23:56

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General

Target
c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
Size 773KB
Sample240507-3y6bvafd2v
SHA256 c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642
MD5 61565cb8d60ec35e5bc56ac8bf0a5eed
SHA1 abaa43442434e22d3f98e2fd99499b511b22b6c2
SHA512 f45e611e8944563d5283ab6ace9591578bcf74f1a3b024e49d1ec7e267d1d80638a5d3fb78736488fc09838d3c64b34f0208c980161124d36d2c129176b1b4cb
SSDEEP 12288:+r+wxBSJAOQvmvaKFCrFEUXXbZol+vfrLhDmJuRVZorzHV5rZS6nZNbNZk:+6z2OQuFUZS+7LEuRPonVhn9Zk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/1324-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1324-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1324-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1324-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/512-5-0x0000000003760000-0x000000000387B000-memory.dmp	family_djvu
behavioral2/memory/1324-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1540-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1540-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1540-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1540-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/512-31-0x0000000003760000-0x000000000387B000-memory.dmp	family_djvu
behavioral2/memory/1540-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1540-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1540-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1540-37-0x0000000000400000-0x0000000000537000-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
1156	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-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\06ddcebe-465e-4292-95ad-62538f671b3e\\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe\" --AutoStart"	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.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
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 512 set thread context of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 724 set thread context of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77

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
1324	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
1324	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
1540	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
1540	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 512 wrote to memory of 1324	512	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	73
PID 1324 wrote to memory of 1156	1324	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	74
PID 1324 wrote to memory of 1156	1324	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	74
PID 1324 wrote to memory of 1156	1324	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	74
PID 1324 wrote to memory of 724	1324	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	75
PID 1324 wrote to memory of 724	1324	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	75
PID 1324 wrote to memory of 724	1324	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	75
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77
PID 724 wrote to memory of 1540	724	c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe	77

C:\Users\Admin\AppData\Local\Temp\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
"C:\Users\Admin\AppData\Local\Temp\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:512
- C:\Users\Admin\AppData\Local\Temp\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
  "C:\Users\Admin\AppData\Local\Temp\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1324
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\06ddcebe-465e-4292-95ad-62538f671b3e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1156
- - C:\Users\Admin\AppData\Local\Temp\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
    "C:\Users\Admin\AppData\Local\Temp\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:724
  - - C:\Users\Admin\AppData\Local\Temp\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
      "C:\Users\Admin\AppData\Local\Temp\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1540

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 26f7df2742be7eae0cecb3954ab69d2f1ad25c6b63a21e3a477ea34dee8301ae
MD5 af14424bd91fa356e225129fe451aacc
SHA1 4046dc95051bf8382196ff1fec36326c22dc1aae
SHA512 362068ce189ee00c318b574ebc8fc4f2e09add21f6c79aea8fe2f69ece44c0beaeb6c7fec7297a0b758ea5b8879ab0e9993c74ab262e200e289c05833e734179
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 8383ef48255e91fd7eb4894e0d3d782f8f33651c0b39fec7a6c7930b8aa4efd5
MD5 791cac94ef076fbd73d7ce39373895b1
SHA1 5e90b62e074f15a0079b4a8da60e43ae15fe21c6
SHA512 fc170e440ac1cb89a6ef43f2aebbd4161d651f63839889f65dc9f6df0f58d38980c4407f59bc1bb7bdf582fb1d50d306283f45e8439d07d6e8e4a2e4cbcd0352
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 c46a0d780ec7a88ca00a2de1b598254e6b87bcd9b88cd0a72ca1789410319bd8
MD5 65b640e3c4700d061ed4195da538caaa
SHA1 6f9b1a6b06b0dc9bde943d675ea0a28273bf24d2
SHA512 4e2be1900d2edbc759056e65a9656526faf80ae8c628adb9189f31dc489fc8a64e035cc0a899b83711e6ebe1a8fea636bf7d1ed12fdc8efdf7846c3439589987
MD5 SHA1 SHA512

Submit Download

c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe

Path C:\Users\Admin\AppData\Local\06ddcebe-465e-4292-95ad-62538f671b3e\c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642.exe
Size 773KB
SHA256 c55cc386307057326269602b35ffc9d7f445b99e5183707cd03937cad0a4e642
MD5 61565cb8d60ec35e5bc56ac8bf0a5eed
SHA1 abaa43442434e22d3f98e2fd99499b511b22b6c2
SHA512 f45e611e8944563d5283ab6ace9591578bcf74f1a3b024e49d1ec7e267d1d80638a5d3fb78736488fc09838d3c64b34f0208c980161124d36d2c129176b1b4cb
SSDEEP 12288:+r+wxBSJAOQvmvaKFCrFEUXXbZol+vfrLhDmJuRVZorzHV5rZS6nZNbNZk:+6z2OQuFUZS+7LEuRPonVhn9Zk
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/512-4-0x00000000036B0000-0x0000000003751000-memory.dmp

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memory/512-5-0x0000000003760000-0x000000000387B000-memory.dmp

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memory/512-31-0x0000000003760000-0x000000000387B000-memory.dmp

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memory/1324-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1324-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1324-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1324-1-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1324-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1540-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1540-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1540-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1540-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1540-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1540-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1540-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1540-37-0x0000000000400000-0x0000000000537000-memory.dmp

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