djvu | 09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972

Analysis

max time kernel
292s
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
23/05/2024, 22:34

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General

Target
09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
Size 710KB
Sample240523-2henhsbf3z
SHA256 09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972
MD5 40036b013c2180c9327edb88b03fd68b
SHA1 dd8e9ce493da9acd69f551b2767b25f5ae05fbd1
SHA512 0a671b357a97612d201f035283dfa18185b64802a0ee604f9f229d1805db8fca51346f2a75ba7ff040fb059a1de74c1daa24e66ade3c204fff01f80b323bb816
SSDEEP 12288:glBJwvsh726PM8q4jXEvLMSJzUrcmJFntBvA64LvJxY6rHpSRtL7favAWtcE7:glB6vJqM54IYgkTntNQvJzrHpAh7S
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 12 IoCs

resource	yara_rule
behavioral2/memory/1320-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1320-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1320-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1320-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/360-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/360-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/360-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/360-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/360-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/360-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/360-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/360-39-0x0000000000400000-0x0000000000537000-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
1932	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-1-5-21-873560699-1074803302-2326074425-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\58d4f7c9-660a-4326-be7a-15ac6dc9f889\\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe\" --AutoStart"	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.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
10	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2424 set thread context of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 4112 set thread context of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78

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
1320	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
1320	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
360	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
360	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 2424 wrote to memory of 1320	2424	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	74
PID 1320 wrote to memory of 1932	1320	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	75
PID 1320 wrote to memory of 1932	1320	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	75
PID 1320 wrote to memory of 1932	1320	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	75
PID 1320 wrote to memory of 4112	1320	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	76
PID 1320 wrote to memory of 4112	1320	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	76
PID 1320 wrote to memory of 4112	1320	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	76
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78
PID 4112 wrote to memory of 360	4112	09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe	78

C:\Users\Admin\AppData\Local\Temp\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
"C:\Users\Admin\AppData\Local\Temp\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2424
- C:\Users\Admin\AppData\Local\Temp\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
  "C:\Users\Admin\AppData\Local\Temp\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1320
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\58d4f7c9-660a-4326-be7a-15ac6dc9f889" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1932
- - C:\Users\Admin\AppData\Local\Temp\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
    "C:\Users\Admin\AppData\Local\Temp\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4112
  - - C:\Users\Admin\AppData\Local\Temp\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
      "C:\Users\Admin\AppData\Local\Temp\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:360

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 564b4fa6970bf22294bceca2fb8f53087f3f5dec9565872d731cedd80aa9e7c3
MD5 6e66bd2d283b36991f7460262e5ff4ae
SHA1 eb6906c6d9350ef0b8ff2edd81c3e51649b4a916
SHA512 974fef50144e97b5bbae326f07ec863082693396e85dd42a0f85c86b6a3d0928b2da485cb7b3e541942d3c9bf49ce2f8063acf0ced79d6ed755928fdba453727
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 7c080f1bbe43e45ab4cb79b63f42a535339d13f244cabf91c625c333c36bf52f
MD5 b3e899af154e14158a21b3615be3c406
SHA1 2d8dc2edb1c83991a2536233b107f0ddfe970663
SHA512 171df85a71f1837f762ae6bc61d56196c0ff5d40221ef4e95c49c598d0039e8187d3191d7e64feb9fb4c4ee1a6cfa01e0a5aa30bc5311ee5342fa3cd9f7a2147
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 d4ad860a95fbb4b22d72e9044feaad09fb24c19d45a3ef89ea19c1c551f211a0
MD5 2af76755ab0b530c4b12d81d70516302
SHA1 2ec3f18cea2fb7e2ce1b85b6fb5c9778561fc9f4
SHA512 c067581143752bccdf318b6276e5e5feaf0a265a6b828be3b84714269ad25ac4710efa9411b1eb07041ae21018262aefeaeac4bce3aed94c29d94d5a228c4b67
MD5 SHA1 SHA512

Submit Download

09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe

Path C:\Users\Admin\AppData\Local\58d4f7c9-660a-4326-be7a-15ac6dc9f889\09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972.exe
Size 710KB
SHA256 09484b9bdfb7a0f1486211178e0c36c45e5e0898466699ca1c1922b2f1f7f972
MD5 40036b013c2180c9327edb88b03fd68b
SHA1 dd8e9ce493da9acd69f551b2767b25f5ae05fbd1
SHA512 0a671b357a97612d201f035283dfa18185b64802a0ee604f9f229d1805db8fca51346f2a75ba7ff040fb059a1de74c1daa24e66ade3c204fff01f80b323bb816
SSDEEP 12288:glBJwvsh726PM8q4jXEvLMSJzUrcmJFntBvA64LvJxY6rHpSRtL7favAWtcE7:glB6vJqM54IYgkTntNQvJzrHpAh7S
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/360-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/360-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/360-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/360-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/360-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/360-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/360-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/360-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1320-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1320-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1320-5-0x00007FFFF2690000-0x00007FFFF286B000-memory.dmp

Download

memory/1320-20-0x00007FFFF2690000-0x00007FFFF286B000-memory.dmp

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memory/1320-1-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1320-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2424-3-0x00007FFFF2690000-0x00007FFFF286B000-memory.dmp

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