djvu | d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893

Analysis

max time kernel
148s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
29/04/2024, 19:20

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General

Target
d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
Size 702KB
Sample240429-x2fbyaba8x
SHA256 d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893
MD5 164daa2e41570b1348fcf5f0b59d7ef8
SHA1 55be058a18b0c4b5eb9a0ff4bdbdf4cd092a513a
SHA512 b863804a35197dab5a56e4a1a3fa536272d1201ff0cad6192d97ee50096efb02415bcfca5e619a3e5e5c5506faf7f00b086d37d4b5833f911b52ff267660d392
SSDEEP 12288:/FnTi1nLMQs1pl0NloNnuCEH3hxsDN2p2:9nmhYDHO4NnuJHk
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/4916-2-0x0000000004A70000-0x0000000004B8B000-memory.dmp	family_djvu
behavioral2/memory/3624-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3576-31-0x0000000000400000-0x0000000000537000-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
4840	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-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b17efa79-9a87-4b1b-a77e-d749326e47f0\\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe\" --AutoStart"	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4916 set thread context of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4736 set thread context of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.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
3624	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
3624	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
3576	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
3576	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 4916 wrote to memory of 3624	4916	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	80
PID 3624 wrote to memory of 4840	3624	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	81
PID 3624 wrote to memory of 4840	3624	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	81
PID 3624 wrote to memory of 4840	3624	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	81
PID 3624 wrote to memory of 4736	3624	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	82
PID 3624 wrote to memory of 4736	3624	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	82
PID 3624 wrote to memory of 4736	3624	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	82
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4736 wrote to memory of 3576	4736	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85

C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
"C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
  "C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3624
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b17efa79-9a87-4b1b-a77e-d749326e47f0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4840
- - C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
    "C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4736
  - - C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
      "C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3576

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

d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe

Path C:\Users\Admin\AppData\Local\b17efa79-9a87-4b1b-a77e-d749326e47f0\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
Size 702KB
SHA256 d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893
MD5 164daa2e41570b1348fcf5f0b59d7ef8
SHA1 55be058a18b0c4b5eb9a0ff4bdbdf4cd092a513a
SHA512 b863804a35197dab5a56e4a1a3fa536272d1201ff0cad6192d97ee50096efb02415bcfca5e619a3e5e5c5506faf7f00b086d37d4b5833f911b52ff267660d392
SSDEEP 12288:/FnTi1nLMQs1pl0NloNnuCEH3hxsDN2p2:9nmhYDHO4NnuJHk
MD5 SHA1 SHA512 SSDEEP

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memory/3576-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-16-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3576-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3624-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3624-12-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3624-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3624-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3624-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4916-1-0x00000000048A0000-0x0000000004939000-memory.dmp

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memory/4916-2-0x0000000004A70000-0x0000000004B8B000-memory.dmp

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