djvu | 917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a

Analysis

max time kernel
291s
max time network
297s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
09/05/2024, 23:13

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General

Target
917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
Size 818KB
Sample240509-27n89ace2y
SHA256 917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a
MD5 a0e214068a05c7bcb9b7dc3882ae11fc
SHA1 0e2f33a7cb123a043fbfbbf06f4c3674f6b102a9
SHA512 683d3f5327112836e8f88cb8def047c17fb61b8c776ca216f267a25694e373e92a782a4b0b931f294b099fd3b5c1fff4b3da8373e4ae2018cbd361bfb9da09e8
SSDEEP 12288:KbLRA0V/1O3xHV/KwI2GOBwt+0Lh2AFNQs1GcPxnb/aIjsK0:w1O3VtKwnwvl2AFNQGZnb
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 14 IoCs

resource	yara_rule
behavioral2/memory/3080-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3080-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3080-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3080-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2612-3-0x0000000003760000-0x000000000387B000-memory.dmp	family_djvu
behavioral2/memory/3080-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-36-0x0000000000400000-0x0000000000537000-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
4340	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-1-5-21-873560699-1074803302-2326074425-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bf829438-f972-42c1-90e1-ebc847cc9fdc\\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe\" --AutoStart"	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.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
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2612 set thread context of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 1508 set thread context of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79

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
3080	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
3080	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
1956	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
1956	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 2612 wrote to memory of 3080	2612	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	75
PID 3080 wrote to memory of 4340	3080	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	76
PID 3080 wrote to memory of 4340	3080	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	76
PID 3080 wrote to memory of 4340	3080	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	76
PID 3080 wrote to memory of 1508	3080	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	77
PID 3080 wrote to memory of 1508	3080	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	77
PID 3080 wrote to memory of 1508	3080	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	77
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79
PID 1508 wrote to memory of 1956	1508	917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe	79

C:\Users\Admin\AppData\Local\Temp\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
"C:\Users\Admin\AppData\Local\Temp\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2612
- C:\Users\Admin\AppData\Local\Temp\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
  "C:\Users\Admin\AppData\Local\Temp\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3080
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\bf829438-f972-42c1-90e1-ebc847cc9fdc" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4340
- - C:\Users\Admin\AppData\Local\Temp\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
    "C:\Users\Admin\AppData\Local\Temp\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1508
  - - C:\Users\Admin\AppData\Local\Temp\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
      "C:\Users\Admin\AppData\Local\Temp\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1956

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 40a181e9a8b85b862afc89a604eb290be3b5cd68937feb9ccfc467d3589e8e5c
MD5 b6e71adf7324685d8f60c97bdb99f892
SHA1 ac45dd58c3dfb5d68ffdbc27817f1e5ad5720830
SHA512 f864a712e300632059c0678ff5f54412fc7f7a1db02e469bcdc77be452886b55cd3d08ff51076278d1a21b091b2fc459e30c53b0d8e8855dbfefa59f0ee4cea9
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 a1cd35322f797ff6d61c5684655f5e4434a190a24ab97478b4bcbc1d9ff4b619
MD5 228bb252e5e4076b0c1dc140d63ad8b1
SHA1 9aa679fff3c7eb79d60cbcd64880222a4dd9c5e6
SHA512 808f1e21f4801693425f1e1e6597b0169d897321dcba8e403c4a9159148611cb03b4b05a4375aae08eff8678a5733433ae112d641047fdfe567b0327d22cb5ec
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 e4c14f30913820d15292163fd6e0feebc9a10fbd05e4b89728d7c89c329a3603
MD5 839da287d5af9200954a7c36da56b2bf
SHA1 251c4c9482d067dbfced3d8b61fe27fea1b01374
SHA512 b94f37878e54a7f26eab0e376009e762324ef2a6e22834f97c4f1de82dc5d0652428740ed76e24b6728e6b5ae4d5ff6022433215f0650ca89169ebf9ec23f636
MD5 SHA1 SHA512

Submit Download

917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe

Path C:\Users\Admin\AppData\Local\bf829438-f972-42c1-90e1-ebc847cc9fdc\917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a.exe
Size 818KB
SHA256 917b3549188a94defbd99a0ac7a730ce3f6ad0de550206cbeda6ffeb8e6e634a
MD5 a0e214068a05c7bcb9b7dc3882ae11fc
SHA1 0e2f33a7cb123a043fbfbbf06f4c3674f6b102a9
SHA512 683d3f5327112836e8f88cb8def047c17fb61b8c776ca216f267a25694e373e92a782a4b0b931f294b099fd3b5c1fff4b3da8373e4ae2018cbd361bfb9da09e8
SSDEEP 12288:KbLRA0V/1O3xHV/KwI2GOBwt+0Lh2AFNQs1GcPxnb/aIjsK0:w1O3VtKwnwvl2AFNQGZnb
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1956-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1956-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1956-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1956-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1956-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1956-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1956-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1956-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-3-0x0000000003760000-0x000000000387B000-memory.dmp

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memory/2612-1-0x0000000001CE0000-0x0000000001D82000-memory.dmp

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memory/3080-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3080-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3080-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3080-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3080-19-0x0000000000400000-0x0000000000537000-memory.dmp

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