Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240709-en -
resource tags
arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system -
submitted
09-07-2024 23:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-07-09_daaa8c6d8b91f552bc30f6a0f1e88334_bkransomware.exe
Resource
win7-20240705-en
General
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Target
2024-07-09_daaa8c6d8b91f552bc30f6a0f1e88334_bkransomware.exe
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Size
2.4MB
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MD5
daaa8c6d8b91f552bc30f6a0f1e88334
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SHA1
cd213bbf8310492f1fb1bd840394b82a77cca398
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SHA256
96c11c69b06e7eeabb364d69a882bc5db048ee2747a05093238f27aefb1fcc1b
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SHA512
715f544ac6f5b900ce256fd82f695e9217cc70656950e3d834fa812ad01aeebe8a7345a0cabd7d2cded7e14694ed50b590eda83a09df340975b369f0bf783cb0
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SSDEEP
49152:agq8vNCYHcOcXDJxTKaKj7unKRjVW1tEXVY:agq2C6mXt1K7j7BA1tEF
Malware Config
Extracted
phorphiex
http://185.215.113.66/
http://77.91.77.92/
http://91.202.233.141/
0xCa90599132C4D88907Bd8E046540284aa468a035
TRuGGXNDM1cavQ1AqMQHG8yfxP4QWVSMN6
qph44jx8r9k5xeq5cuf958krv3ewrnp5vc6hhdjd3r
XryzFMFVpDUvU7famUGf214EXD3xNUSmQf
LLeT2zkStY3cvxMBFhoWXkG5VuZPoezduv
rwc4LVd9ABpULQ1CuCpDkgX2xVB1fUijyb
4AtjkCVKbtEC3UEN77SQHuH9i1XkzNiRi5VCbA2XGsJh46nJSXfGQn4GjLuupCqmC57Lo7LvKmFUyRfhtJSvKvuw3h9ReKK
15TssKwtjMtwy4vDLcLsQUZUD2B9f7eDjw85sBNVC5LRPPnC
17hgMFyLDwMjxWqw5GhijhnPdJDyFDqecY
ltc1qt0n3f0t7vz9k0mvcswk477shrxwjhf9sj5ykrp
3PMiLynrGVZ8oEqvoqC4hXD67B1WoALR4pc
3FerB8kUraAVGCVCNkgv57zTBjUGjAUkU3
DLUzwvyxN1RrwjByUPPzVMdfxNRPGVRMMA
t1J6GCPCiHW1eRdjJgDDu6b1vSVmL5U7Twh
stars125f3mw4xd9htpsq4zj5w5ezm5gags37yxxh6mj
bnb1epx67ne4vckqmaj4gwke8m322f4yjr6eh52wqw
bc1qmpkehfffkr6phuklsksnd7nhgx0369sxu772m3
bitcoincash:qph44jx8r9k5xeq5cuf958krv3ewrnp5vc6hhdjd3r
GBQJMXYXPRIWFMXIFJR35ZB7LRKMB4PHCIUAUFR3TKUL6RDBZVLZEUJ3
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mutex
55a4er5wo
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user_agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Signatures
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Modifies security service 2 TTPs 1 IoCs
Processes:
sysmablsvr.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\Start = "4" sysmablsvr.exe -
Phorphiex payload 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\2355024307.exe family_phorphiex -
Processes:
sysmablsvr.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" sysmablsvr.exe -
Downloads MZ/PE file
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Executes dropped EXE 4 IoCs
Processes:
8C32.exe2355024307.exesysmablsvr.exe2087927000.exepid process 4908 8C32.exe 1420 2355024307.exe 4880 sysmablsvr.exe 3228 2087927000.exe -
Processes:
sysmablsvr.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiSpywareOverride = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1" sysmablsvr.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" sysmablsvr.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
2355024307.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Settings = "C:\\Windows\\sysmablsvr.exe" 2355024307.exe -
Drops file in Windows directory 2 IoCs
Processes:
2355024307.exedescription ioc process File created C:\Windows\sysmablsvr.exe 2355024307.exe File opened for modification C:\Windows\sysmablsvr.exe 2355024307.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
2024-07-09_daaa8c6d8b91f552bc30f6a0f1e88334_bkransomware.exe8C32.exe2355024307.exesysmablsvr.exedescription pid process target process PID 2152 wrote to memory of 4908 2152 2024-07-09_daaa8c6d8b91f552bc30f6a0f1e88334_bkransomware.exe 8C32.exe PID 2152 wrote to memory of 4908 2152 2024-07-09_daaa8c6d8b91f552bc30f6a0f1e88334_bkransomware.exe 8C32.exe PID 2152 wrote to memory of 4908 2152 2024-07-09_daaa8c6d8b91f552bc30f6a0f1e88334_bkransomware.exe 8C32.exe PID 4908 wrote to memory of 1420 4908 8C32.exe 2355024307.exe PID 4908 wrote to memory of 1420 4908 8C32.exe 2355024307.exe PID 4908 wrote to memory of 1420 4908 8C32.exe 2355024307.exe PID 1420 wrote to memory of 4880 1420 2355024307.exe sysmablsvr.exe PID 1420 wrote to memory of 4880 1420 2355024307.exe sysmablsvr.exe PID 1420 wrote to memory of 4880 1420 2355024307.exe sysmablsvr.exe PID 4880 wrote to memory of 3228 4880 sysmablsvr.exe 2087927000.exe PID 4880 wrote to memory of 3228 4880 sysmablsvr.exe 2087927000.exe PID 4880 wrote to memory of 3228 4880 sysmablsvr.exe 2087927000.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-07-09_daaa8c6d8b91f552bc30f6a0f1e88334_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-07-09_daaa8c6d8b91f552bc30f6a0f1e88334_bkransomware.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:2152 -
C:\Users\Admin\AppData\Local\Temp\8C32.exe"C:\Users\Admin\AppData\Local\Temp\8C32.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4908 -
C:\Users\Admin\AppData\Local\Temp\2355024307.exeC:\Users\Admin\AppData\Local\Temp\2355024307.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1420 -
C:\Windows\sysmablsvr.exeC:\Windows\sysmablsvr.exe4⤵
- Modifies security service
- Windows security bypass
- Executes dropped EXE
- Windows security modification
- Suspicious use of WriteProcessMemory
PID:4880 -
C:\Users\Admin\AppData\Local\Temp\2087927000.exeC:\Users\Admin\AppData\Local\Temp\2087927000.exe5⤵
- Executes dropped EXE
PID:3228
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
7KB
MD5dd4a0ff33915c8c60a771851bad19e0b
SHA11f9e76ce72c790eecf87068607234d57e5a4d095
SHA256c4b4f771907c36c65fe352d920923cd63d99eaff8d2fa44f80e26ddaba61f341
SHA5121ed0daf3cfd84dfb3b616d367509ab70756596cc7cbe42dcd0fccc1eaf7081c3c5965739e7c72bba4f9ce94b3630c480534b6bc41e401d2a727d536d3e0e0e05
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Filesize
88KB
MD54505daf4c08fc8e8e1380911e98588aa
SHA1d990eb1b2ccbb71c878944be37923b1ebd17bc72
SHA256a2139600c569365149894405d411ea1401bafc8c7e8af1983d046cf087269c40
SHA512bb57d11150086c3c61f9a8fdd2511e3e780a24362183a6b833f44484238451f23b74b244262009f38a8baa7254d07dfdd9d4209efcf426dfd4e651c47f2f8cec
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Filesize
9KB
MD58d8e6c7952a9dc7c0c73911c4dbc5518
SHA19098da03b33b2c822065b49d5220359c275d5e94
SHA256feb4c3ae4566f0acbb9e0f55417b61fefd89dc50a4e684df780813fb01d61278
SHA51291a573843c28dd32a9f31a60ba977f9a3d4bb19ffd1b7254333e09bcecef348c1b3220a348ebb2cb08edb57d56cb7737f026519da52199c9dc62c10aea236645