djvu | 6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a

Analysis

max time kernel
146s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
26/05/2024, 05:10

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General

Target
6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
Size 733KB
Sample240526-fty1msgh54
SHA256 6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a
MD5 cf060e3341788ee60679f7770a693022
SHA1 a7429069651062ebc1b84ba7fdb51898c2d724ea
SHA512 7ce3afa01c13491d25c23a8d96ad3a447759b7af2f6cd69509b4101544f66720d132b63d650a69a846a7a7bcdf47f781680dcffb434d9c623d68bddfd92c3f0f
SSDEEP 12288:PiH8zs008N52SupW/sXNXaSk2H37ahdM27moao7jY5K72is:Pi3ON52PDXNKC7CxmJ+YQiis
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/4276-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4276-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3288-4-0x0000000004AE0000-0x0000000004BFB000-memory.dmp	family_djvu
behavioral2/memory/4276-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4276-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4276-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4656-37-0x0000000000400000-0x0000000000537000-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
1056	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\cdcb4c9b-dee5-4c8a-9efd-0a361c701e4b\\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe\" --AutoStart"	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.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
7	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3288 set thread context of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 440 set thread context of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82

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
4276	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
4276	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
4656	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
4656	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 3288 wrote to memory of 4276	3288	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	77
PID 4276 wrote to memory of 1056	4276	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	78
PID 4276 wrote to memory of 1056	4276	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	78
PID 4276 wrote to memory of 1056	4276	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	78
PID 4276 wrote to memory of 440	4276	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	79
PID 4276 wrote to memory of 440	4276	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	79
PID 4276 wrote to memory of 440	4276	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	79
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82
PID 440 wrote to memory of 4656	440	6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe	82

C:\Users\Admin\AppData\Local\Temp\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
"C:\Users\Admin\AppData\Local\Temp\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3288
- C:\Users\Admin\AppData\Local\Temp\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
  "C:\Users\Admin\AppData\Local\Temp\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4276
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\cdcb4c9b-dee5-4c8a-9efd-0a361c701e4b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1056
- - C:\Users\Admin\AppData\Local\Temp\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
    "C:\Users\Admin\AppData\Local\Temp\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:440
  - - C:\Users\Admin\AppData\Local\Temp\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
      "C:\Users\Admin\AppData\Local\Temp\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4656

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 e9e041a83d7f3dbd6adfeda50b7ff9d3fd1abfcfb4fc5906d481c33db7072b85
MD5 dd3850d9ce5a33ba453ba4d1dfb4ba51
SHA1 df05b044dd14e7d009aad0398686bbfd6fff1491
SHA512 ec27ccc61d0133a76a612d5ddde2c6193f96302e17f66a75da8e1ad18ee871fe6b307e535317726449dc724331d4f48376d03201ad8d9dc2985aa0420d45b8e4
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 f8a43617d6211687bcf2954ef0137edeb2f39e49139d2c5671e8cdd4d6806490
MD5 fb665a358952539bcac0614a8bd14ef9
SHA1 c451e362d40022f5096946b5524a97b121507f4b
SHA512 6068efa52359408828b54cacd3b588b941a2917716d5aa3585c99c1065c93b64498ccf608af24bee300f77c5020ed9c7a69d92d9fd22b8505bad2b7625ce0ef7
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 a4dad01680d3e5aef728e8b4b47037d8283ebf6ec279075cb671ebb49e7e9e11
MD5 4c155566f6c060eccac00d5f95549362
SHA1 2bd30946da9028a04d1c2d2943602da722250f68
SHA512 5dc7ddaad5c53e9173923cc6fc5fa79d59b44aeae945dc9a7cae1c04e71e6ed31ce2bc71c273eac8c23fc95cc29eeb819d3cd9a35a96453d807a05b361a8fbd8
MD5 SHA1 SHA512

Submit Download

6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe

Path C:\Users\Admin\AppData\Local\cdcb4c9b-dee5-4c8a-9efd-0a361c701e4b\6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a.exe
Size 733KB
SHA256 6a04cbe42c5ce6f85169138ce099f8b329a8b00a94761d93e93afd1703d2a09a
MD5 cf060e3341788ee60679f7770a693022
SHA1 a7429069651062ebc1b84ba7fdb51898c2d724ea
SHA512 7ce3afa01c13491d25c23a8d96ad3a447759b7af2f6cd69509b4101544f66720d132b63d650a69a846a7a7bcdf47f781680dcffb434d9c623d68bddfd92c3f0f
SSDEEP 12288:PiH8zs008N52SupW/sXNXaSk2H37ahdM27moao7jY5K72is:Pi3ON52PDXNKC7CxmJ+YQiis
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3288-4-0x0000000004AE0000-0x0000000004BFB000-memory.dmp

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memory/3288-1-0x0000000004A40000-0x0000000004ADD000-memory.dmp

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memory/4276-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4276-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4276-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4276-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4276-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4656-37-0x0000000000400000-0x0000000000537000-memory.dmp

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