Analysis Overview
SHA256
968e3fac7b477dfa7b0064ddd254e63155a20eced174f1d63d5b8a404c89ca33
Threat Level: Shows suspicious behavior
The file 2024-05-30_490a955172e90c8fb03c0272a91c1028_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
2024-05-30 23:24
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-30 23:24
Reported
2024-05-30 23:27
Platform
win7-20240221-en
Max time kernel
118s
Max time network
119s
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\2024-05-30_490a955172e90c8fb03c0272a91c1028_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\2024-05-30_490a955172e90c8fb03c0272a91c1028_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\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2240 wrote to memory of 1204 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2240 wrote to memory of 1204 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2240 wrote to memory of 1204 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2240 wrote to memory of 1204 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
Files
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
C:\Users\Admin\AppData\Local\Temp\Pm6jQr85KePH109.exe
| MD5 | 69c48e4b74f195e6e3ba4790170bca15 |
| SHA1 | 14644d99cfa35bae5d0e71ef2b88bf70ef89be3c |
| SHA256 | 09d72e46fd62ed6c900476447263093433ddd285b03f0d41b9e38384f1201fd8 |
| SHA512 | dc9661277f2bedfa7d708016cd3bf127856ff6480cf58551b7a5a97dd4f9bcdf52482eb0d182ab7c4be38ce2feda4873d394363c575a32d4b1e28b7851683259 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-30 23:24
Reported
2024-05-30 23:27
Platform
win10v2004-20240508-en
Max time kernel
133s
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\2024-05-30_490a955172e90c8fb03c0272a91c1028_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\2024-05-30_490a955172e90c8fb03c0272a91c1028_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\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\CTS.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2312 wrote to memory of 3100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2312 wrote to memory of 3100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | C:\Windows\CTS.exe |
| PID 2312 wrote to memory of 3100 | N/A | C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe | C:\Windows\CTS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_490a955172e90c8fb03c0272a91c1028_bkransomware.exe"
C:\Windows\CTS.exe
"C:\Windows\CTS.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 145.83.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| BE | 88.221.83.201:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 201.83.221.88.in-addr.arpa | udp |
| BE | 88.221.83.201:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 45.19.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
Files
C:\Windows\CTS.exe
| MD5 | f9d4ab0a726adc9b5e4b7d7b724912f1 |
| SHA1 | 3d42ca2098475924f70ee4a831c4f003b4682328 |
| SHA256 | b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc |
| SHA512 | 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432 |
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
| MD5 | c3fdda17102fa9110b8051036612d99f |
| SHA1 | fc0cbe8e38267de9cf362997ff55237dc8bfc160 |
| SHA256 | 97a0ed8eb041ba88f70776955322e5dab2dd935ddb47787ac7fc93c8259c07a2 |
| SHA512 | 5b2f20889ffcac7928f9d0b8f36a80da85a040c55552e42d021120c4aeae35b00bbc77628d24e387b43e2a8d7bf5db96a7a3b051fafccb05e49359fb4eb571d9 |
C:\Users\Admin\AppData\Local\Temp\S57tQx7cUBMmzed.exe
| MD5 | 00421a83c4d8d9f78bc025adde1c6fa9 |
| SHA1 | e258562cbae75574ff5bdedcf113876520b83558 |
| SHA256 | 0c2167d8d5c4533bab3351a2a02b378156c77231e2ccb8347bc50cb1e5f5923d |
| SHA512 | f732859892f7c3e7b9f2a76416089012bcbb4dff006ca3b0c1a76cb38470a89d5bb59ecde92ebbec71bedd021fb2f253ad91c946d8a0927b04957012d10a1916 |