djvu | 9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0

Analysis

max time kernel
147s
max time network
132s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
24/04/2024, 15:24

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General

Target
9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
Size 763KB
Sample240424-ss3zescd41
SHA256 9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0
MD5 4f8fb134c680d0e05861a34827751834
SHA1 5a20d1ff30218dea67d3ff7f61e16e5cc958006f
SHA512 ba90af804408ffde34cb5b7d8d4a4b30ea99f66844ee3d272368086a3bae472347c76440fe93196a457e4fbc10a67b6312a998fd8d30a06001c4b635838fee35
SSDEEP 12288:S13ahbKvq4YIvjnARDUsrD4Shv9QSrwZ/BpOtI7wWsvvaGDXRorYm+0FPSoyWHJk:NJ49sHv9zsZ/B0tWFoXRorg0BSFWHJPc
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 17 IoCs

resource	yara_rule
behavioral2/memory/4500-2-0x0000000006030000-0x000000000614B000-memory.dmp	family_djvu
behavioral2/memory/2960-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2960-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2960-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2960-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2960-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/420-39-0x0000000000400000-0x0000000000537000-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
1772	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-1-5-21-801765966-3955847401-2235691403-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4d25de6a-ce2a-43f1-8b0b-c2110232877c\\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe\" --AutoStart"	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.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
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4500 set thread context of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 2112 set thread context of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85

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
2960	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
2960	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
420	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
420	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 4500 wrote to memory of 2960	4500	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	78
PID 2960 wrote to memory of 1772	2960	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	81
PID 2960 wrote to memory of 1772	2960	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	81
PID 2960 wrote to memory of 1772	2960	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	81
PID 2960 wrote to memory of 2112	2960	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	82
PID 2960 wrote to memory of 2112	2960	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	82
PID 2960 wrote to memory of 2112	2960	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	82
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85
PID 2112 wrote to memory of 420	2112	9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe	85

C:\Users\Admin\AppData\Local\Temp\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
"C:\Users\Admin\AppData\Local\Temp\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Users\Admin\AppData\Local\Temp\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
  "C:\Users\Admin\AppData\Local\Temp\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2960
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4d25de6a-ce2a-43f1-8b0b-c2110232877c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1772
- - C:\Users\Admin\AppData\Local\Temp\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
    "C:\Users\Admin\AppData\Local\Temp\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2112
  - - C:\Users\Admin\AppData\Local\Temp\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
      "C:\Users\Admin\AppData\Local\Temp\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:420

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 fe8079d0a697efbc9cd448968ec09f9a24aa17646114be475c4864d04b57c808
MD5 b976722e6aa4d29d0c420c7b71ee206a
SHA1 fa154a81a9adcff6ae004eb5a020eeab7bf1e6a0
SHA512 b73be5f9fa8747c50c8bc736a3608d2a0393ce49f11fe0cb39c894d4f87455d55bcd0dd100f81d0ac8830fa72a98fbb15914115716d783a422600e576ab672ff
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 ce2b31604625f92db9c3b6975392a2c568d1de639970562a36fad97cddbe89ad
MD5 000f7c0e8eb32d5e422e988922cbcd1d
SHA1 8391228586f7eb08b7866f100484bcb49a4d34a0
SHA512 b9c8a64dc12347fb06fa4293e35fe5eced827509d99f35684b62e40791a50478c8fbf2132f80b37c88c736ba5343e3be642341029436624a06e2eb079befdfb4
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 0b2d35d209bed19f5b73ddbca29b5bf999f0f1e61cd8449dcbb43f1d09d0e6c3
MD5 c8fc7d479c63227513f6a964c93284a3
SHA1 76969826a842873928509f017a292e5de63a24b4
SHA512 f0a1979db3a078bda7622ab45b9e795eb04144bc543ee73280819506fc2b1619b36cc1a942df21a03a8697b4739ce43309a9cd6d0ce41af60d199e2eea70f53b
MD5 SHA1 SHA512

Submit Download

9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe

Path C:\Users\Admin\AppData\Local\4d25de6a-ce2a-43f1-8b0b-c2110232877c\9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0.exe
Size 763KB
SHA256 9c9ed624eaf441b4637d50fe25d386636c5cb59fb69f5b824afc7cec6dfff7f0
MD5 4f8fb134c680d0e05861a34827751834
SHA1 5a20d1ff30218dea67d3ff7f61e16e5cc958006f
SHA512 ba90af804408ffde34cb5b7d8d4a4b30ea99f66844ee3d272368086a3bae472347c76440fe93196a457e4fbc10a67b6312a998fd8d30a06001c4b635838fee35
SSDEEP 12288:S13ahbKvq4YIvjnARDUsrD4Shv9QSrwZ/BpOtI7wWsvvaGDXRorYm+0FPSoyWHJk:NJ49sHv9zsZ/B0tWFoXRorg0BSFWHJPc
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/420-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/420-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2112-20-0x00000000042D0000-0x000000000436B000-memory.dmp

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memory/2960-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2960-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2960-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2960-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2960-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4500-2-0x0000000006030000-0x000000000614B000-memory.dmp

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memory/4500-1-0x0000000004750000-0x00000000047E8000-memory.dmp

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