djvu | 87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb

Analysis

max time kernel
144s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09/05/2024, 23:50

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General

Target
87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
Size 722KB
Sample240509-3v251she63
SHA256 87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb
MD5 a974032594e06e98f660c03678a3c8a9
SHA1 ccf9348280c9dae0b5c1aa5f265b28af0bedebf8
SHA512 1af56a3af3c2a01423c1659bdaed66fa7160bcc5fff3b0d6b0300e69195ea5d674ce21093eb40ae4cfb71ce43f8aa15005f3ad049ef8f95510f457d28400e1dc
SSDEEP 12288:Jka8O/CTG4TJ3XFJbJoP+1APoq98IatrZo3iycIIHFny2Ny3NuLCxyLPxjgdUZ4Q:JktTZHVom1APoq98dVoyyvcFQ3ULSsxD
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/2512-2-0x00000000042A0000-0x00000000043BB000-memory.dmp	family_djvu
behavioral2/memory/1260-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1260-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1260-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1260-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1260-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1836-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4376	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-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3e8662bf-a358-4295-9861-feeb638d01d3\\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe\" --AutoStart"	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.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 2512 set thread context of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 5004 set thread context of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89

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
1260	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
1260	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
1836	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
1836	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 2512 wrote to memory of 1260	2512	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	85
PID 1260 wrote to memory of 4376	1260	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	86
PID 1260 wrote to memory of 4376	1260	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	86
PID 1260 wrote to memory of 4376	1260	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	86
PID 1260 wrote to memory of 5004	1260	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	87
PID 1260 wrote to memory of 5004	1260	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	87
PID 1260 wrote to memory of 5004	1260	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	87
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89
PID 5004 wrote to memory of 1836	5004	87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe	89

C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
"C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
  "C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1260
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\3e8662bf-a358-4295-9861-feeb638d01d3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4376
- - C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
    "C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5004
  - - C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
      "C:\Users\Admin\AppData\Local\Temp\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1836

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

Query Registry

T1012

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 40a181e9a8b85b862afc89a604eb290be3b5cd68937feb9ccfc467d3589e8e5c
MD5 b6e71adf7324685d8f60c97bdb99f892
SHA1 ac45dd58c3dfb5d68ffdbc27817f1e5ad5720830
SHA512 f864a712e300632059c0678ff5f54412fc7f7a1db02e469bcdc77be452886b55cd3d08ff51076278d1a21b091b2fc459e30c53b0d8e8855dbfefa59f0ee4cea9
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 ae925c68ec38debcc5279b4420528343006d0310c18f90e9f82c660d7f597df7
MD5 a76e0be65897088494323b8644f6414e
SHA1 754973ed3cfefda1a3abb9ee9246322063d9c8e4
SHA512 7fe41c17997ecc8b3ac1cf403a074334a9b3bebf748c5b0c07035f6a72a8a35a1d6f85acca9de7b7eabf3a111cf080ad8a95df8bd8d304f0ad8d83423798fbbf
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 9faf545d860ceee555f0bd459b247632ba603969f2cb9f173f87473b204c36bc
MD5 e55e126af2b9e5d0596209ffd9c3527c
SHA1 55809e220f0adddffabb7421e7cfb3b177508847
SHA512 2014b646d7a2bfea6711802115fe4297e02952d06837d6a61a5f4a84c2e361d5cc29295dac6b1f03d2493218380046e36f4204b5be3779da40448d3c083ab299
MD5 SHA1 SHA512

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87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe

Path C:\Users\Admin\AppData\Local\3e8662bf-a358-4295-9861-feeb638d01d3\87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb.exe
Size 722KB
SHA256 87f0d64f0c5d354992d208b9cb1ffa50ede41deb9188f9f0a0c08cff29125ddb
MD5 a974032594e06e98f660c03678a3c8a9
SHA1 ccf9348280c9dae0b5c1aa5f265b28af0bedebf8
SHA512 1af56a3af3c2a01423c1659bdaed66fa7160bcc5fff3b0d6b0300e69195ea5d674ce21093eb40ae4cfb71ce43f8aa15005f3ad049ef8f95510f457d28400e1dc
SSDEEP 12288:Jka8O/CTG4TJ3XFJbJoP+1APoq98IatrZo3iycIIHFny2Ny3NuLCxyLPxjgdUZ4Q:JktTZHVom1APoq98dVoyyvcFQ3ULSsxD
MD5 SHA1 SHA512 SSDEEP

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memory/1260-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1260-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1260-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1260-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1260-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1836-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2512-2-0x00000000042A0000-0x00000000043BB000-memory.dmp

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memory/2512-1-0x0000000004200000-0x0000000004298000-memory.dmp

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