Analysis Overview
SHA256
df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763
Threat Level: Known bad
The file rBlbqI2.exe was found to be: Known bad.
Malicious Activity Summary
Jigsaw
Executes dropped EXE
Loads dropped DLL
Drops desktop.ini file(s)
Adds Run entry to start application
Drops file in Windows directory
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2020-05-01 14:11
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2020-05-01 14:11
Reported
2020-05-01 14:14
Platform
win7v200430
Max time kernel
35s
Max time network
6s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe | N/A |
Adds Run entry to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
Jigsaw
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 824 wrote to memory of 1500 | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe |
| PID 824 wrote to memory of 1500 | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe |
| PID 824 wrote to memory of 1500 | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe |
| PID 824 wrote to memory of 1500 | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe
"C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe"
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
"C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe
Network
| Country | Destination | Domain | Proto |
| N/A | 239.255.255.250:1900 | udp | |
| N/A | 239.255.255.250:1900 | udp | |
| N/A | 224.0.0.22 | igmp |
Files
memory/824-0-0x0000000001FB0000-0x0000000001FC1000-memory.dmp
\Users\Admin\AppData\Local\Drpbx\drpbx.exe
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
memory/1500-8-0x0000000001FD0000-0x0000000001FE1000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2020-05-01 14:11
Reported
2020-05-01 14:14
Platform
win10v200430
Max time kernel
128s
Max time network
97s
Command Line
Signatures
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\assembly | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
| File created | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
| File opened for modification | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File created | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
| File opened for modification | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1356 wrote to memory of 1828 | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe |
| PID 1356 wrote to memory of 1828 | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe |
| PID 1356 wrote to memory of 1828 | N/A | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe | N/A |
Adds Run entry to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" | C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe | N/A |
Jigsaw
Processes
C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe
"C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe"
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
"C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe
Network
| Country | Destination | Domain | Proto |
| N/A | 239.255.255.250:1900 | udp | |
| N/A | 239.255.255.250:1900 | udp | |
| N/A | 10.10.0.255:137 | udp | |
| N/A | 8.8.8.8:53 | udp | |
| N/A | 52.109.12.19:443 | nexusrules.officeapps.live.com | tcp |
| N/A | 10.10.0.16:137 | udp | |
| N/A | 10.10.0.31:137 | udp |
Files
memory/1356-0-0x0000000002480000-0x0000000002481000-memory.dmp
memory/1356-1-0x0000000002480000-0x0000000002481000-memory.dmp
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
memory/1828-5-0x0000000002330000-0x0000000002331000-memory.dmp