djvu | 41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 18:25

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General

Target
41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
Size 738KB
Sample240522-w2p1psca28
SHA256 41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925
MD5 05567327c48b4b2af47574295ee9748b
SHA1 7595f946efc74526f2b989413e73e3f37c4b4765
SHA512 293c0df46670b450a5a840a424ef1848a2dd8634a5e837b1ace4196ba76ba040dcb12a8a0397a4c1583af3d1b63227653999b64247f6b593ef5c1cf2ec33fdea
SSDEEP 12288:xIArWcHGmhaQSRJSYXYDNV+VA6Sy7ng50CgH969W6Cw:xo1JSrDNV7y7n1ldK
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/2372-2-0x0000000004100000-0x000000000421B000-memory.dmp	family_djvu
behavioral2/memory/3428-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3428-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3428-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3428-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3428-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2956-35-0x0000000000400000-0x0000000000537000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1392	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-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a0f8d110-3a71-471d-84a6-59f3f952f32e\\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe\" --AutoStart"	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.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
8	api.2ip.ua
16	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2372 set thread context of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 3060 set thread context of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.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
3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
2956	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
2956	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 2372 wrote to memory of 3428	2372	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	83
PID 3428 wrote to memory of 1392	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	85
PID 3428 wrote to memory of 1392	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	85
PID 3428 wrote to memory of 1392	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	85
PID 3428 wrote to memory of 3060	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	87
PID 3428 wrote to memory of 3060	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	87
PID 3428 wrote to memory of 3060	3428	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	87
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89
PID 3060 wrote to memory of 2956	3060	41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe	89

C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
"C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
  "C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3428
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\a0f8d110-3a71-471d-84a6-59f3f952f32e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1392
- - C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
    "C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3060
  - - C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
      "C:\Users\Admin\AppData\Local\Temp\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2956

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 e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
MD5 6728aea2631b86a76c237508d8ba9b55
SHA1 7a670f95cac088313f7558869162fe01c6dc0ec9
SHA512 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
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 cf1c7062acc7a650a31bfb3653c8e7064cd27326594e00e94f1d31f4e3c15753
MD5 3373dbeea4ce7ec1624a25669b96c0d0
SHA1 a1cef0ea77fac36fdfb3fb6fdfede45370146534
SHA512 caad38da82117157b25db851a0e011722013bf37403d46be992f91ca623820ecacbe327b38e62b2511db5425e8f37a6672b9421ef534d14aa99dc83babc35c3d
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 9884762bca242b6e7b45947b55c5a822081c50b33203ec99887de619ae0b8e82
MD5 cadba2e275b58dd22a66c2ff973b3bfd
SHA1 18bb988169b11e47968d54b3f1df17f4d6d713a3
SHA512 56d8a85f9f3260a8afb217f05c237bdc4fc9562162df552d5769d6b1f27630e9a021e1100161bd210c3532dbb3ea223870c59e5028d1f185d5cf3ca5f9cede87
MD5 SHA1 SHA512

Submit Download

41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe

Path C:\Users\Admin\AppData\Local\a0f8d110-3a71-471d-84a6-59f3f952f32e\41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925.exe
Size 738KB
SHA256 41414ecd1275b4aaa6c0b82659b622a46426b599855cb402ace8358e42e18925
MD5 05567327c48b4b2af47574295ee9748b
SHA1 7595f946efc74526f2b989413e73e3f37c4b4765
SHA512 293c0df46670b450a5a840a424ef1848a2dd8634a5e837b1ace4196ba76ba040dcb12a8a0397a4c1583af3d1b63227653999b64247f6b593ef5c1cf2ec33fdea
SSDEEP 12288:xIArWcHGmhaQSRJSYXYDNV+VA6Sy7ng50CgH969W6Cw:xo1JSrDNV7y7n1ldK
MD5 SHA1 SHA512 SSDEEP

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memory/2372-1-0x00000000026C0000-0x0000000002759000-memory.dmp

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memory/2372-2-0x0000000004100000-0x000000000421B000-memory.dmp

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memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2956-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3428-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3428-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3428-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3428-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3428-17-0x0000000000400000-0x0000000000537000-memory.dmp

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