djvu | f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de

Analysis

max time kernel
294s
max time network
297s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
06/05/2024, 05:53

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General

Target
f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
Size 810KB
Sample240506-glcccabe2v
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 14 IoCs

resource	yara_rule
behavioral2/memory/168-2-0x0000000003740000-0x000000000385B000-memory.dmp	family_djvu
behavioral2/memory/1940-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1940-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1940-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1940-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1940-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/596-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/596-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/596-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/596-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/596-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/596-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/596-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/596-36-0x0000000000400000-0x0000000000537000-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
2992	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-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\46d1e46a-5379-4f7e-a9ee-8c4edb56aeb4\\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
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 168 set thread context of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 3068 set thread context of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.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
1940	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
1940	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
596	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
596	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 168 wrote to memory of 1940	168	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	74
PID 1940 wrote to memory of 2992	1940	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	75
PID 1940 wrote to memory of 2992	1940	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	75
PID 1940 wrote to memory of 2992	1940	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	75
PID 1940 wrote to memory of 3068	1940	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	76
PID 1940 wrote to memory of 3068	1940	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	76
PID 1940 wrote to memory of 3068	1940	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	76
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78
PID 3068 wrote to memory of 596	3068	f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe	78

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:168
- C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
  "C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\46d1e46a-5379-4f7e-a9ee-8c4edb56aeb4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2992
- - 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:3068
  - - C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
      "C:\Users\Admin\AppData\Local\Temp\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:596

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 7c70cd97fb88cd2af5dbc7121aa06b35d413310d738ac29b1656ccf1e5d3f058
MD5 b46cf5c72fdf37be9df659cc175e08e0
SHA1 372f0083f22399bc1dce4e526699639bd563cb49
SHA512 a5bab815f1bd37f0d7abaa62b43309bbe311c4f4995fe19818c0cfbe284f807fdd2631613e8e4c73828d90a3c060abb17342fce44747c9102c396809db7a5992
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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 274c96da934cb82f6b4773f346add56bfd749783e7274559b5ae5cdcddbad515
MD5 50ce2868d82320e17e844917335be5b2
SHA1 e91f144ca38cf7ec5f0dca7d184f717bfeefc2bf
SHA512 80b3da4f83ff7002e3b786034a4bbb2fb7aa46d976dfb877632e23e4d97ec0c2e319a75922e0bbbc25eecd98ace7e77b97c60e1a66258477239b3c68a4e29fed
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 470c5facd3f13f6a0a9edca2eb652955afec62cdd4984302906cca06312ba936
MD5 b2e61825b82e303117b87628c81fddc4
SHA1 198d557fb93e49ac70d8f03b99ab2a8216c348ea
SHA512 f7ae46e09f95d00f1bad27a44e570ed45266c660551e5d3284d7024eedb8b50c086ed9fc287d1eda826b53f800eb5d4a463496b531f1a1c0d09e115f598205c6
MD5 SHA1 SHA512

Submit Download

f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe

Path C:\Users\Admin\AppData\Local\46d1e46a-5379-4f7e-a9ee-8c4edb56aeb4\f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de.exe
Size 810KB
SHA256 f0d3903bf6809f0f4e7a71a96a6ce9ab5b722a7587fa70adf9562b631192c7de
MD5 00f5b90eb3c54429360443bce6322b6e
SHA1 d3234636627b6f6c746902897789ff8dc90845cb
SHA512 e2ee443bdd902ad4e605489cee603b3f39a6dd832f9f80b3df04bcff6467965d06cfb777c95c4adea513c05b3d4e7e7fdd5141e3e8037aa3b5a189d46d8489c2
SSDEEP 12288:kdOcryILg/rbLbn8K5cdCVDVCsa94y2fGZZjz8QijcrUmNhz:OryIOrbcK5cdCVDIVGfYjz81QIm
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/168-2-0x0000000003740000-0x000000000385B000-memory.dmp

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memory/168-1-0x0000000001AA0000-0x0000000001B34000-memory.dmp

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memory/596-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/596-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/596-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/596-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/596-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/596-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/596-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/596-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1940-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1940-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1940-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1940-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1940-3-0x0000000000400000-0x0000000000537000-memory.dmp

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