djvu | cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49

Analysis

max time kernel
141s
max time network
128s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
02/05/2024, 19:43

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General

Target
cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
Size 790KB
Sample240502-yfcjlaee3z
SHA256 cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49
MD5 6006144f86c78d38cde4909f42bce6a9
SHA1 b7a77c33e1c3deb73bc2a4f0e5a0c7266a54ce5b
SHA512 07c6c5e0bcc4bf66788454c5032a99cb5861bdec3e2cd0d3e9aa7552dea30a960e5b6b7b2577f1e827ebefda4cd269fbae82ea18df1d4353ee73883153f9ead7
SSDEEP 12288:MgsKwcJStUJkvTtJzPtCLb3J7+7LKPiIPicrJa1lTCf:Kcyv/PwLb3J7+7LKvPicr4TC
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgzq
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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/4620-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4620-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4620-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4620-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1876-4-0x0000000004A00000-0x0000000004B1B000-memory.dmp	family_djvu
behavioral2/memory/4620-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1600-37-0x0000000000400000-0x0000000000537000-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
1864	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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5f0a6957-cbfc-4d85-b6d1-ad2912841938\\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe\" --AutoStart"	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.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
2	api.2ip.ua
8	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1876 set thread context of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1116 set thread context of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86

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
4620	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
4620	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
1600	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
1600	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 1876 wrote to memory of 4620	1876	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	81
PID 4620 wrote to memory of 1864	4620	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	82
PID 4620 wrote to memory of 1864	4620	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	82
PID 4620 wrote to memory of 1864	4620	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	82
PID 4620 wrote to memory of 1116	4620	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	83
PID 4620 wrote to memory of 1116	4620	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	83
PID 4620 wrote to memory of 1116	4620	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	83
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86
PID 1116 wrote to memory of 1600	1116	cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe	86

C:\Users\Admin\AppData\Local\Temp\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
"C:\Users\Admin\AppData\Local\Temp\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Users\Admin\AppData\Local\Temp\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
  "C:\Users\Admin\AppData\Local\Temp\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4620
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5f0a6957-cbfc-4d85-b6d1-ad2912841938" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1864
- - C:\Users\Admin\AppData\Local\Temp\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
    "C:\Users\Admin\AppData\Local\Temp\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1116
  - - C:\Users\Admin\AppData\Local\Temp\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
      "C:\Users\Admin\AppData\Local\Temp\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1600

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 a923caeac048416a4f6d16993cd0428c085e9e5704190cf6ec6263e25d363969
MD5 4c46ed5fedad016479cacc0840ef1dad
SHA1 6af64fdc9b149490ab4485fecaa374c07004bcc6
SHA512 cc64de7b08f3299973f1e05881284ffcd0ba9681b00aa65077d95670576e386ac5e8591867536b2a71addc22e41d545b075b180f30aa218a20691d65ec6f8ad8
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 c06166319dfe32cfce5181a020b089216ae6fb4f495cc1903aef094ee7cb43d6
MD5 e28ef7db98991202341d6c2bee948ca5
SHA1 c8aa5d30b466defee8c7159007bccee992dc3e2a
SHA512 98c6e3ba8737bacb92a748bb6e536611b39a10d2aa94b596cedfd36ef89321f03855c355a4032f47c01da11ea506d6c6c8dc047ba7ae01688bd89f3d8a0e34ac
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 6c7d4dec27c4c53cc882b98535c6db17595e0698c716e757bb37de045ec1f856
MD5 1ace785fb09bfd1e63ae4a2b92758a72
SHA1 a8bf0a0dcab3f3b5365141978ec3eeae05670f43
SHA512 4258978a48a5a75856c61f08315dd1073286954b25252a4ec46b93c077305bf7bf3cc2ee3905c518fd5364c8d2fa3b47a0958138956ad463687deb3ae6b9cdd3
MD5 SHA1 SHA512

Submit Download

cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe

Path C:\Users\Admin\AppData\Local\5f0a6957-cbfc-4d85-b6d1-ad2912841938\cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49.exe
Size 790KB
SHA256 cdcbdb2e79a498adebe8c811eb0e284224166aaeffb94d1d04e0cf85c5eeff49
MD5 6006144f86c78d38cde4909f42bce6a9
SHA1 b7a77c33e1c3deb73bc2a4f0e5a0c7266a54ce5b
SHA512 07c6c5e0bcc4bf66788454c5032a99cb5861bdec3e2cd0d3e9aa7552dea30a960e5b6b7b2577f1e827ebefda4cd269fbae82ea18df1d4353ee73883153f9ead7
SSDEEP 12288:MgsKwcJStUJkvTtJzPtCLb3J7+7LKPiIPicrJa1lTCf:Kcyv/PwLb3J7+7LKvPicr4TC
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1600-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1600-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1600-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1600-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1600-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1600-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1600-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1600-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1600-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1876-4-0x0000000004A00000-0x0000000004B1B000-memory.dmp

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memory/1876-1-0x0000000003140000-0x00000000031D9000-memory.dmp

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memory/4620-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4620-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4620-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4620-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4620-19-0x0000000000400000-0x0000000000537000-memory.dmp

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