djvu | d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893

Analysis

max time kernel
139s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-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 15 IoCs

resource	yara_rule
behavioral1/memory/1584-2-0x00000000048A0000-0x00000000049BB000-memory.dmp	family_djvu
behavioral1/memory/316-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/316-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/316-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/316-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/316-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4912-37-0x0000000000400000-0x0000000000537000-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2956	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-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d0122314-abfd-4ea2-a4a5-50fbd96bb761\\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe\" --AutoStart"	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.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
11	api.2ip.ua
17	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1584 set thread context of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 4012 set thread context of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.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
316	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
316	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
4912	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
4912	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 1584 wrote to memory of 316	1584	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	85
PID 316 wrote to memory of 2956	316	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	86
PID 316 wrote to memory of 2956	316	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	86
PID 316 wrote to memory of 2956	316	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	86
PID 316 wrote to memory of 4012	316	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	87
PID 316 wrote to memory of 4012	316	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	87
PID 316 wrote to memory of 4012	316	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	87
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89
PID 4012 wrote to memory of 4912	4012	d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe	89

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:1584
- C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
  "C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:316
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d0122314-abfd-4ea2-a4a5-50fbd96bb761" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2956
- - 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:4012
  - - C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe
      "C:\Users\Admin\AppData\Local\Temp\d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4912

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 880e9493a52a3726a09faee961611cd35b857043ddc50846e648febf0b22099d
MD5 1516a6f80d6bb7cbea2876c52e1e2ff0
SHA1 b13a9a9e8a99d2d94ab66fdeec970252cf0c1258
SHA512 8626fd39c4f26a0c41c097fc055a67e9ca9b088bfd1232e4fe8df92dbb9649696e4efe1e602b55802c674b72acd83745cd5a4eb9f71df48e34fc86bedc600102
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 427a609243d619f521e1bda9c41da22a1e7930e6ad613866873f8649425f5fd3
MD5 fdbfe9489a79de8c80c65c3d861fcd4b
SHA1 96b51b221ec1d23e615c89af282ad2bb878ae975
SHA512 12881991bd9622ad0582d12987446179561a7db5667810153e90a9699891f88eac262f93aef5be5c280591b106fe1450216a6994b73263c83397c6051542fe3d
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 d7ff94a097a340a1cd6349cf19885d669c3fde82484850ac7edf803fb9a16cff
MD5 410156f57400d82608b7c524350991b1
SHA1 6d4c26d4845f7094f19d20510bac4012ec81a779
SHA512 5a5aecd034948581f4bb5711bf9a7419e9c504637d3a49d6563e2f7262b8c7cc237f180b28ba4fc089a6de71b822829beb4153274e0740591198c7895867e715
MD5 SHA1 SHA512

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d127f9abf62606037f60834e4acb08fa42420d07a51221502010a4cc8479e893.exe

Path C:\Users\Admin\AppData\Local\d0122314-abfd-4ea2-a4a5-50fbd96bb761\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/316-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/316-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/316-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/316-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/316-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1584-2-0x00000000048A0000-0x00000000049BB000-memory.dmp

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memory/1584-1-0x00000000047F0000-0x000000000488F000-memory.dmp

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memory/4912-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4912-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4912-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4912-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4912-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4912-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4912-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4912-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4912-37-0x0000000000400000-0x0000000000537000-memory.dmp

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