djvu | 630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
24/05/2024, 05:10

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General

Target
630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
Size 718KB
Sample240524-ftstmaef8v
SHA256 630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4
MD5 9829fe8c7f6b9498b57923eedbc08708
SHA1 4b1b4e87772e4cbb3cc4c6c0d01216229418c2f1
SHA512 69740b744196076ac493c386e76d4cf772f5969b0a589a5f920e3ab23efd13aa3d520633758fa7c2427d069d0db04fe91749c4146811309255cb9eb5c0d5a683
SSDEEP 12288:rf6yEw+oHz3DU2+xBg1NoMvLCjUxiUJbiijxEB/6nywi:rfnfJT3B0BgPTmS9Jb/xMCyP
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/4216-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3580-4-0x0000000004AD0000-0x0000000004BEB000-memory.dmp	family_djvu
behavioral2/memory/4216-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1200-37-0x0000000000400000-0x0000000000537000-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
1032	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-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f877d67f-e5e3-44be-9cf5-6a54d2f3b501\\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe\" --AutoStart"	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.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 3580 set thread context of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 480 set thread context of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84

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
4216	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
4216	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
1200	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
1200	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 3580 wrote to memory of 4216	3580	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	79
PID 4216 wrote to memory of 1032	4216	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	80
PID 4216 wrote to memory of 1032	4216	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	80
PID 4216 wrote to memory of 1032	4216	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	80
PID 4216 wrote to memory of 480	4216	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	81
PID 4216 wrote to memory of 480	4216	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	81
PID 4216 wrote to memory of 480	4216	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	81
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84
PID 480 wrote to memory of 1200	480	630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe	84

C:\Users\Admin\AppData\Local\Temp\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
"C:\Users\Admin\AppData\Local\Temp\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3580
- C:\Users\Admin\AppData\Local\Temp\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
  "C:\Users\Admin\AppData\Local\Temp\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f877d67f-e5e3-44be-9cf5-6a54d2f3b501" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1032
- - C:\Users\Admin\AppData\Local\Temp\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
    "C:\Users\Admin\AppData\Local\Temp\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:480
  - - C:\Users\Admin\AppData\Local\Temp\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
      "C:\Users\Admin\AppData\Local\Temp\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1200

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 2d50ce482b26ca8229095ee5944a4e0eabd45432dc3990645400ce35364d95ca
MD5 57d351bf5eb69d4b8e57c100d564a90d
SHA1 43a4fc353186137855458bc1275af613b650d00e
SHA512 1d3e3f23de83a23ec81aab2afeb92b3ba685fbe77c5ee965839d8aaac01f8d26250e8d57bd026ea9efecbe10edd9a8a9d439b5b9eeec5c6f8c103cb72a094063
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 3668a9ae400da38ba93a6036bf5231b2164065bb31c9146e75e11471a045d310
MD5 05b3590c2e4e24346899072f12c0f219
SHA1 6658742a2a366514c010d5c45f80d6546ec4cace
SHA512 89f12c291f7c13c1ee8b3c9272ff3a0a75c5aca5037387d22ae0208343a839027fecdeac7dbaa49a744d054d4db7d3d2f7c15958f9111220467f9b6756eca9d3
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 5d4cfcad36b7856511a142c3a7f2e5573ea9156a98bb125a0ecbb565dcf52c7c
MD5 19e5c2a20addf3fcdb7caea5d989a022
SHA1 58090b573af3d7a313bb6da701b022d556b04a2c
SHA512 f195a4034fdc78df8cc95bfd6e86322316d039e59ce7767a5bed303fae37e605c5befc2d627eef025c3436d7475145802c4acf0a244cc8e5e67067c1df234fd2
MD5 SHA1 SHA512

Submit Download

630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe

Path C:\Users\Admin\AppData\Local\f877d67f-e5e3-44be-9cf5-6a54d2f3b501\630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4.exe
Size 718KB
SHA256 630f98b192cd0ebfa607846b6cdaf12d65e21a427aaa527e36a204218c5473a4
MD5 9829fe8c7f6b9498b57923eedbc08708
SHA1 4b1b4e87772e4cbb3cc4c6c0d01216229418c2f1
SHA512 69740b744196076ac493c386e76d4cf772f5969b0a589a5f920e3ab23efd13aa3d520633758fa7c2427d069d0db04fe91749c4146811309255cb9eb5c0d5a683
SSDEEP 12288:rf6yEw+oHz3DU2+xBg1NoMvLCjUxiUJbiijxEB/6nywi:rfnfJT3B0BgPTmS9Jb/xMCyP
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1200-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1200-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1200-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1200-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1200-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1200-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1200-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1200-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1200-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3580-4-0x0000000004AD0000-0x0000000004BEB000-memory.dmp

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memory/3580-1-0x0000000004A30000-0x0000000004ACC000-memory.dmp

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memory/4216-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-19-0x0000000000400000-0x0000000000537000-memory.dmp

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