Analysis Overview
SHA256
4494e4e5ac081e129e9c371c9ce9f4dd33a43d035d729863e9183da39a793296
Threat Level: Shows suspicious behavior
The file 2024-06-12_7d03e7821e52d29ebda64eae2231fff5_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
2024-06-12 14:44
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-12 14:44
Reported
2024-06-12 14:46
Platform
win7-20240508-en
Max time kernel
121s
Max time network
122s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Rp1DohDQnAB4SFs.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\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_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\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_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\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_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\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_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\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\Rp1DohDQnAB4SFs.exe
C:\Users\Admin\AppData\Local\Temp\Rp1DohDQnAB4SFs.exe
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
C:\Users\Admin\AppData\Local\Temp\Rp1DohDQnAB4SFs.exe
| MD5 | af88cab288e8213a11a7ea5313363d31 |
| SHA1 | cb769e3246d5244a0040621e919f7c519ba49986 |
| SHA256 | 7407fac6e170430f34322202b73aa392431b5c2c49e15304fb255bb24c540366 |
| SHA512 | a4e353fcb78579345d4c5bc1f48970b473e0499dfe5bc6abeffb669295fa2940ce8637045a11f881fe88dd9b97d380ae9a8eed1b94fbd47181e0b4eb427e9679 |
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-12 14:44
Reported
2024-06-12 14:46
Platform
win10v2004-20240611-en
Max time kernel
125s
Max time network
151s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\9qbFp3eIbKw5M1Z.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\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_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\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_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\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1232 wrote to memory of 1968 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\9qbFp3eIbKw5M1Z.exe |
| PID 1232 wrote to memory of 1968 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe | C:\Users\Admin\AppData\Local\Temp\9qbFp3eIbKw5M1Z.exe |
| PID 1232 wrote to memory of 2976 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1232 wrote to memory of 2976 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe | C:\Windows\CTS.exe |
| PID 1232 wrote to memory of 2976 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-12_7d03e7821e52d29ebda64eae2231fff5_bkransomware.exe"
C:\Users\Admin\AppData\Local\Temp\9qbFp3eIbKw5M1Z.exe
C:\Users\Admin\AppData\Local\Temp\9qbFp3eIbKw5M1Z.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 --field-trial-handle=4012,i,8998666007764333392,14724298544432336038,262144 --variations-seed-version --mojo-platform-channel-handle=3956 /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 148.177.190.20.in-addr.arpa | udp |
| NL | 23.62.61.160:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 160.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.99.105.20.in-addr.arpa | udp |
| IE | 52.111.236.22:443 | tcp | |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.197.17.2.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\9qbFp3eIbKw5M1Z.exe
| MD5 | af88cab288e8213a11a7ea5313363d31 |
| SHA1 | cb769e3246d5244a0040621e919f7c519ba49986 |
| SHA256 | 7407fac6e170430f34322202b73aa392431b5c2c49e15304fb255bb24c540366 |
| SHA512 | a4e353fcb78579345d4c5bc1f48970b473e0499dfe5bc6abeffb669295fa2940ce8637045a11f881fe88dd9b97d380ae9a8eed1b94fbd47181e0b4eb427e9679 |
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | 397e6560171d2ee6e49d3e133a7ea15e |
| SHA1 | d92d52c1344ce9fa02e19609bc36ce3085040ac5 |
| SHA256 | 48b06f11a024e0cf45c12cad24d8ae39139489bbb2ef7dcae89b19acbd8ea421 |
| SHA512 | f81e4c0068500da3ef129f3c2bbe3cd9f090d8869938d52015749c39941e056685b61ea222c25896695258655e32330b7f156c327698be545b22478dfe10e02a |
C:\Users\Admin\AppData\Local\Temp\9qbFp3eIbKw5M1Z.exe
| MD5 | 819a8c143ce12eb87fa21552472223c6 |
| SHA1 | d73561ef39b84127f5e4e9bf7c604f20356edda4 |
| SHA256 | ccb97d9e67908a9eeda34c1ba9ab664d0af28bf26b09078e1c1fe9bc782713c1 |
| SHA512 | 2dd52e3d30f09a2ebf89e3c733c9a18d623196f59a54232b2262b94506f5ecb9c6cee9c9fa272a57a2ff7cadc80e8e2c7f9490c30493f15018ff1ce0cc2beca1 |