djvu | d4b9f4354252a9c203a211d8d600113f9d236ecca6234f43b5aa02350b5b24cc

Analysis

max time kernel
143s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 15:39

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General

Target
file.exe
Size 793KB
Sample240219-s32jcafd65
SHA256 d4b9f4354252a9c203a211d8d600113f9d236ecca6234f43b5aa02350b5b24cc
MD5 84e5ccdfbdfd9d92456c890e6d8641d4
SHA1 bc1f99c3a86a6a3258e6baa57c26be3a4403146e
SHA512 5f57e132b811e83f167f4b624397262b83982c9781dd05cba20bd2de798fcf1fd010c268060fcdf5601d5c2af1d4a61c2ff8a3ed659a25ceb6a3ef1034b8cf4c
SSDEEP 12288:wtoRocpobWxvcSJj1LT0K85JMR8LNp/tOtMqMXwe/47FXtqtAlkdyiV/M3f:wtlca6F7JHkNp/tOteXvA76Slkdyzf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://habrafa.com/test2/get.php

Attributes

extension
.lkfr
offline_id
OxV6DGl22io8sqMOW1zCCOlzPiv4f1Vqzw7Y8zt1
payload_url
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://we.tl/t-uNdL2KHHdy 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: 0852ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/1508-2-0x0000000002390000-0x00000000024AB000-memory.dmp	family_djvu
behavioral2/memory/4636-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4668-40-0x0000000000400000-0x0000000000537000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3680	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-1-5-21-768304381-2824894965-3840216961-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\414e9734-8fb8-4cc2-a947-c92513219217\\file.exe\" --AutoStart"	file.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
3	api.2ip.ua
4	api.2ip.ua
15	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1508 set thread context of 4636	1508	file.exe	85
PID 624 set thread context of 4668	624	file.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
4636	file.exe
4636	file.exe
4668	file.exe
4668	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 1508 wrote to memory of 4636	1508	file.exe	85
PID 4636 wrote to memory of 3680	4636	file.exe	86
PID 4636 wrote to memory of 3680	4636	file.exe	86
PID 4636 wrote to memory of 3680	4636	file.exe	86
PID 4636 wrote to memory of 624	4636	file.exe	88
PID 4636 wrote to memory of 624	4636	file.exe	88
PID 4636 wrote to memory of 624	4636	file.exe	88
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89
PID 624 wrote to memory of 4668	624	file.exe	89

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1508
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4636
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\414e9734-8fb8-4cc2-a947-c92513219217" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3680
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:624
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4668

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 98c2b007222adfaa8b008a1088da7cdf8f49a4edea94dda5913549eb607f0f74
MD5 5b1e61565370ced4389e1fb9cf2eea34
SHA1 b3247b7d4a124b21c5acb430f207dfacf097f1bf
SHA512 c9cd08e193323351b5b6ef9e3ad5062e1072242a0d4380e7d6dec73a7ffa23a0283eb8ef5595bfd86a4d87ba53c0c5bdb8a83454e856160f42dba7c7f92ed362
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 1f377e49803b3649d02632bf3b374b1ffa069e8cf023f5a049b8fdb26b8918c0
MD5 33c0af78cd1b2d2e4c670e3f8df28e33
SHA1 18573c5620aad06464a12304b6a4d643acad4b92
SHA512 13d9f82b3c704a15040632afda3b1230490dec92504c44e33ec5a3a51f9a373487d7b123e91e3517aa54228088afa2c3f0704cd21fec8f544928669d39cd79ae
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 3056d504a4f9d3faa13fe2f43a9f81c62fa6e7f3d74a6003fa19fc707556c635
MD5 6d2258f2790a80c2d691aa8fed05a6e9
SHA1 5353f0813700f9444c8d1e32e88a97260d54ee72
SHA512 b39fea3d39ffa097ce0dfb4eb13ef8ce21624bae4cf6bd6b4c4acc3ffed4b555f8f43c20082e8be53095791ee8e040159d322ddc437258172de34eb7696fedef
MD5 SHA1 SHA512

Submit Download

file.exe

Path C:\Users\Admin\AppData\Local\414e9734-8fb8-4cc2-a947-c92513219217\file.exe
Size 793KB
SHA256 d4b9f4354252a9c203a211d8d600113f9d236ecca6234f43b5aa02350b5b24cc
MD5 84e5ccdfbdfd9d92456c890e6d8641d4
SHA1 bc1f99c3a86a6a3258e6baa57c26be3a4403146e
SHA512 5f57e132b811e83f167f4b624397262b83982c9781dd05cba20bd2de798fcf1fd010c268060fcdf5601d5c2af1d4a61c2ff8a3ed659a25ceb6a3ef1034b8cf4c
SSDEEP 12288:wtoRocpobWxvcSJj1LT0K85JMR8LNp/tOtMqMXwe/47FXtqtAlkdyiV/M3f:wtlca6F7JHkNp/tOteXvA76Slkdyzf
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/624-20-0x0000000002150000-0x00000000021E6000-memory.dmp

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memory/1508-2-0x0000000002390000-0x00000000024AB000-memory.dmp

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memory/1508-1-0x0000000002220000-0x00000000022BF000-memory.dmp

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memory/4636-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4668-40-0x0000000000400000-0x0000000000537000-memory.dmp

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