Analysis Overview
SHA256
ef1f172c0354bde12b7af5d2a3f38200d83418b511e791590d0a0ed28931f81d
Threat Level: Shows suspicious behavior
The file 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Adds Run key to start application
Drops file in Windows directory
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-11 18:03
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-11 18:03
Reported
2024-06-11 18:06
Platform
win7-20240508-en
Max time kernel
118s
Max time network
119s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\NFVpTyMJr7QmrYa.exe | N/A |
| N/A | N/A | C:\Windows\CTS.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe | N/A |
Reads user/profile data of web browsers
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Windows\CTS.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\CTS.exe | C:\Windows\CTS.exe | N/A |
| File created | C:\Windows\CTS.exe | C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\NFVpTyMJr7QmrYa.exe
C:\Users\Admin\AppData\Local\Temp\NFVpTyMJr7QmrYa.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
\Users\Admin\AppData\Local\Temp\NFVpTyMJr7QmrYa.exe
| MD5 | ec5e7403f86990ab23caeeb4955f5ffb |
| SHA1 | c345479d6dc53a102ccb05259c0c858a1ddd7d8e |
| SHA256 | 352df104254095ddf925514d99bfb5411c95b5386e90caf06557979f82e16844 |
| SHA512 | 679957452967a3d3f3f1c55a9a510befa2d31e3bdb825a76540e845667f61775f4d18c3b3493133dd671b380907aaae0dd380b95729a448acf48d95ca0fe5206 |
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-11 18:03
Reported
2024-06-11 18:06
Platform
win10v2004-20240508-en
Max time kernel
145s
Max time network
151s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\OLUPLp6P2xjbqhE.exe | N/A |
| N/A | N/A | C:\Windows\CTS.exe | N/A |
Reads user/profile data of web browsers
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" | C:\Windows\CTS.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\CTS.exe | C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe | N/A |
| File created | C:\Windows\CTS.exe | C:\Windows\CTS.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\OLUPLp6P2xjbqhE.exe
C:\Users\Admin\AppData\Local\Temp\OLUPLp6P2xjbqhE.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4200,i,10373433614523925616,13586256558317053467,262144 --variations-seed-version --mojo-platform-channel-handle=1960 /prefetch:8
Network
Files
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
C:\Users\Admin\AppData\Local\Temp\OLUPLp6P2xjbqhE.exe
| MD5 | ec5e7403f86990ab23caeeb4955f5ffb |
| SHA1 | c345479d6dc53a102ccb05259c0c858a1ddd7d8e |
| SHA256 | 352df104254095ddf925514d99bfb5411c95b5386e90caf06557979f82e16844 |
| SHA512 | 679957452967a3d3f3f1c55a9a510befa2d31e3bdb825a76540e845667f61775f4d18c3b3493133dd671b380907aaae0dd380b95729a448acf48d95ca0fe5206 |
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | 0f7f86a84658374dc6343c57a83286ce |
| SHA1 | fb6a4e392c4baafb53693e01580b6a49af55ff5c |
| SHA256 | 7db21555b64c9b855a4821685b8d5e2f37141983363f3a305e8edbdd4a5942bc |
| SHA512 | df3032574185d3df0cd2cc909b41338169743380017fe7d97df40c757f613e6973b31f2b253ac905dbbdb904a8e7d7535bfd8cc44cd01d1484461dffdcd04f76 |