djvu | f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de

Analysis

max time kernel
142s
max time network
103s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 15:53

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General

Target
f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
Size 810KB
Sample240503-tbzfcaae8x
SHA256 f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de
MD5 00f5b90eb3c54429360443bce6322b6e
SHA1 d3234636627b6f6c746902897789ff8dc90845cb
SHA512 e2ee443bdd902ad4e605489cee603b3f39a6dd832f9f80b3df04bcff6467965d06cfb777c95c4adea513c05b3d4e7e7fdd5141e3e8037aa3b5a189d46d8489c2
SSDEEP 12288:kdOcryILg/rbLbn8K5cdCVDVCsa94y2fGZZjz8QijcrUmNhz:OryIOrbcK5cdCVDIVGfYjz81QIm
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 18 IoCs

resource	yara_rule
behavioral1/memory/4416-2-0x0000000003750000-0x000000000386B000-memory.dmp	family_djvu
behavioral1/memory/4864-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4864-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4864-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4864-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4864-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5944-34-0x0000000000400000-0x0000000001A95000-memory.dmp	family_djvu
behavioral1/memory/5276-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/5276-41-0x0000000000400000-0x0000000000537000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2044	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-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c3383f21-4b19-4d0a-8be7-e1ef6bc6b9f3\\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe\" --AutoStart"	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.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
13	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4416 set thread context of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 5944 set thread context of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88

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
4864	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
4864	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
5276	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
5276	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4416 wrote to memory of 4864	4416	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	82
PID 4864 wrote to memory of 2044	4864	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	85
PID 4864 wrote to memory of 2044	4864	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	85
PID 4864 wrote to memory of 2044	4864	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	85
PID 4864 wrote to memory of 5944	4864	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	86
PID 4864 wrote to memory of 5944	4864	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	86
PID 4864 wrote to memory of 5944	4864	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	86
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88
PID 5944 wrote to memory of 5276	5944	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	88

C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
"C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4416
- C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
  "C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4864
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c3383f21-4b19-4d0a-8be7-e1ef6bc6b9f3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2044
- - C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
    "C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5944
  - - C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
      "C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:5276

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 872ac376bc8e2d40af544eef8087ec7bcc424b9115491cc2e5490cf8dcf893c3
MD5 117ca974ee34db2c4bdaa8a4e4761aa1
SHA1 9ba6ffaabc1aa208e96e1d52395aaace2f55249a
SHA512 21f4f289d4ceeaa456eb7aaccc7b612b12fab6690fc4b5c92cd595dc35c4765ff597d6ec6b00bc2415a0fb49da465c5f446c0ea5e514447d0e59dc15cbb0a9b1
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 a850194bb3463fdef1832237a062d4e97c15a7c2f51fbeedae105af43e68b200
MD5 097b1335cd98029cdd143b35e138b5a7
SHA1 2edce7d1e2f338c70001682f85f8c6a60cf13ece
SHA512 6ab541dbb286ac19ee91c27f7ed0708211eaad13c91d0f32a23887e96f1ae2f7ed77c43997e28e27e2d7f2188607f1499a840444401aaf198b6540a486254c3b
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 dfe5e5437f37242e0b4d94c08caba525221ebc73f6c51b412441a56e020b34e2
MD5 b6066e36ab426dd57b128cae26cf846b
SHA1 f745637f12cd50dbd52349d5036fa461ef8ced74
SHA512 34e720fa6ec8c546776013fb1786f7c717f3fb42041a1db68effd7c7887a7ae7a9c657f09503422d631d4a21e82651f3308c11cd1882a5585967b6892135f5df
MD5 SHA1 SHA512

Submit Download

f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe

Path C:\Users\Admin\AppData\Local\c3383f21-4b19-4d0a-8be7-e1ef6bc6b9f3\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
Size 810KB
SHA256 f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de
MD5 00f5b90eb3c54429360443bce6322b6e
SHA1 d3234636627b6f6c746902897789ff8dc90845cb
SHA512 e2ee443bdd902ad4e605489cee603b3f39a6dd832f9f80b3df04bcff6467965d06cfb777c95c4adea513c05b3d4e7e7fdd5141e3e8037aa3b5a189d46d8489c2
SSDEEP 12288:kdOcryILg/rbLbn8K5cdCVDVCsa94y2fGZZjz8QijcrUmNhz:OryIOrbcK5cdCVDIVGfYjz81QIm
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4416-1-0x0000000001CD0000-0x0000000001D67000-memory.dmp

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memory/4416-2-0x0000000003750000-0x000000000386B000-memory.dmp

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memory/4864-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4864-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4864-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4864-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4864-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5276-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5944-24-0x0000000000400000-0x0000000001A95000-memory.dmp

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memory/5944-34-0x0000000000400000-0x0000000001A95000-memory.dmp

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