Analysis Overview
SHA256
bfd18f72aab900840cc667f96449dbd01158970223ec1c25df9965ba1ad0b59d
Threat Level: Shows suspicious behavior
The file 2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
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 17:53
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-11 17:53
Reported
2024-06-11 17:56
Platform
win7-20240508-en
Max time kernel
122s
Max time network
124s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| 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_56c46bfa121fca06c1325981e6c13195_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_56c46bfa121fca06c1325981e6c13195_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_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2956 wrote to memory of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2956 wrote to memory of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2956 wrote to memory of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2956 wrote to memory of 2100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
C:\Windows\CTS.exe
| MD5 | 66df4ffab62e674af2e75b163563fc0b |
| SHA1 | dec8a197312e41eeb3cfef01cb2a443f0205cd6e |
| SHA256 | 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163 |
| SHA512 | 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25 |
C:\Users\Admin\AppData\Local\Temp\1JfwafEvokpQAbN.exe
| MD5 | 893912ff0c0fdf6b37227ef8fe1be850 |
| SHA1 | 354d5572c3e8061e54454546cc88174398324da1 |
| SHA256 | cd047dd6083c20858fb99d04c4ef822617b3ce75f5abc34044d0b0c84a6bac61 |
| SHA512 | 0c73c1ed1b8c426482aba3dd4330bb1b402d07ddd8d93d93cb9eade9943c1d07ecd9b790dfb5b02f24523cdc160b70efa4f4a9d31c46305d156adab5e1586c26 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-11 17:53
Reported
2024-06-11 17:56
Platform
win10v2004-20240226-en
Max time kernel
140s
Max time network
151s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| 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_56c46bfa121fca06c1325981e6c13195_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_56c46bfa121fca06c1325981e6c13195_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_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 536 wrote to memory of 2916 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | C:\Windows\CTS.exe |
| PID 536 wrote to memory of 2916 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | C:\Windows\CTS.exe |
| PID 536 wrote to memory of 2916 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_56c46bfa121fca06c1325981e6c13195_bkransomware.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 --mojo-platform-channel-handle=4456 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.43.201.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| GB | 172.217.169.74:443 | tcp | |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 13.107.253.64:443 | tcp | |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 145.83.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 31.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 114.83.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 7.173.189.20.in-addr.arpa | udp |
Files
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 | bf54e6a94aad67a4d3486b1a7b710005 |
| SHA1 | 143028dea97021a7e0e73f1b13dba3bf3ed008f4 |
| SHA256 | 03488e832d54c38ec26bbba20f52457998801f44c958ee428c0cce75564ad4ee |
| SHA512 | daab54fbdab9cd1062f81d2032796ceb4a8b472c3791a69b8a56d33ea232dac10cb0441b4f6d533ec5b7ed80a27a5ade1f898b1a80fd570599bf4d47b10ecd60 |
C:\Users\Admin\AppData\Local\Temp\DYyOizMUpYD2WYB.exe
| MD5 | 5d9b5f41943bf3ae7f7a98c388ee285c |
| SHA1 | f1ea2c250e2dfff22c487ca41491ad9b89ecd64d |
| SHA256 | 42db6416458cb6cc4111287f7e8e26926766f3631227d22a4dcdc5cf116e8e18 |
| SHA512 | 57ec57c2967c61b98007f71f3cfc56091bdaf216bdd3c324dbb6ba65de887247d8d5c15cf2a39ae83673f06b32fada2a3487aa894a5e06cfddb3f12e44d474f2 |