djvu | 3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe

Analysis

max time kernel
300s
max time network
298s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
09/05/2024, 22:51

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General

Target
3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
Size 774KB
Sample240509-2stv7aee64
SHA256 3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe
MD5 384c3b29fa6133e729935cfc7e1c5472
SHA1 1cf7b27af78d099cceb891dc83d11b0c44b31e97
SHA512 04cdb0dda7ada79a9a049385776c4102bd80bf8354a1eef4ceddf1c619723418ccddc68f5fb38fb8fadaa2f886deab56077c615f7f164a19d80dc1c75bdcfe2e
SSDEEP 24576:JXkCuJNMor20dvGaJoedS4xgEFMNmTmJ:1kC0rrv5R1xgEGmT
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/3336-3-0x0000000004940000-0x0000000004A5B000-memory.dmp	family_djvu
behavioral2/memory/1992-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4376-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4376-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4376-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4376-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4376-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4376-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4376-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4376-36-0x0000000000400000-0x0000000000537000-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
216	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\\747864b5-448e-43b5-b692-9e60c6ef3335\\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe\" --AutoStart"	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.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
12	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3336 set thread context of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 4500 set thread context of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77

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
1992	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
1992	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
4376	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
4376	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 3336 wrote to memory of 1992	3336	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	73
PID 1992 wrote to memory of 216	1992	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	74
PID 1992 wrote to memory of 216	1992	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	74
PID 1992 wrote to memory of 216	1992	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	74
PID 1992 wrote to memory of 4500	1992	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	75
PID 1992 wrote to memory of 4500	1992	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	75
PID 1992 wrote to memory of 4500	1992	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	75
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77
PID 4500 wrote to memory of 4376	4500	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	77

C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
"C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
  "C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1992
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\747864b5-448e-43b5-b692-9e60c6ef3335" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:216
- - C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
    "C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4500
  - - C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
      "C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4376

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 b50c616b5c29bd9611ed360a238b6b6c421d0fe3b85df331e4951aefab526b2e
MD5 5857aff0ea0365561d0f06769a04101c
SHA1 0ac570f0ec93618c5849baf94c0a167e4a706a95
SHA512 1863b40407893a4a26beaa7ae4add199676c15b633d59afb4dfd2906328b29497fdddcb0ff01b9ba77ac59c5c55511fa669b0ffd6e02bcfa2d2cc53df62390be
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 d77310d0ad50f4b9c287ca676d5473ba77ad1d5c9cdbabebfb1246470865b0a2
MD5 ecf7c6e04854131a9cd579c8d60971d8
SHA1 0371de7eb74792544e177fd3eede3937143405a5
SHA512 a2e5295bbd6d8ac5af065dd372e42ea3242426203197ba3204c6ca6417b09ab43b7a90b920bb2307dd2faa1d97174c3a1bfe25ba153a5fde6426072c69fe7768
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 bd48c681124ee0e3b19bf39761a55ccd1c39922a5ca18e780ba623ca49f3b415
MD5 7f010335a70937f3b14c3bc84053dd4d
SHA1 af3960a1065e894a5b30fc96d264d64bb178f2b6
SHA512 af955216cc8d5470c9e516667df454a41b3c8747d6c629f5ebd1d61240269142f0c40ab10294f0e82bf2539b19bfe29db23b3ce181036bf8958726a9ee6b27bd
MD5 SHA1 SHA512

Submit Download

3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe

Path C:\Users\Admin\AppData\Local\747864b5-448e-43b5-b692-9e60c6ef3335\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
Size 774KB
SHA256 3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe
MD5 384c3b29fa6133e729935cfc7e1c5472
SHA1 1cf7b27af78d099cceb891dc83d11b0c44b31e97
SHA512 04cdb0dda7ada79a9a049385776c4102bd80bf8354a1eef4ceddf1c619723418ccddc68f5fb38fb8fadaa2f886deab56077c615f7f164a19d80dc1c75bdcfe2e
SSDEEP 24576:JXkCuJNMor20dvGaJoedS4xgEFMNmTmJ:1kC0rrv5R1xgEGmT
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1992-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1992-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3336-3-0x0000000004940000-0x0000000004A5B000-memory.dmp

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memory/3336-1-0x00000000030F0000-0x0000000003191000-memory.dmp

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memory/4376-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4376-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4376-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4376-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4376-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4376-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4376-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4376-36-0x0000000000400000-0x0000000000537000-memory.dmp

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