Analysis Overview
SHA256
bbcd72e82d0511c6fda963e60a70d942e39e36e37ac225f75f3f5b9aa96b3e17
Threat Level: Known bad
The file BCBP-FT-TRANSFER-287287912.scr.exe was found to be: Known bad.
Malicious Activity Summary
NanoCore
Executes dropped EXE
Loads dropped DLL
Adds Run key to start application
Checks whether UAC is enabled
Suspicious use of SetThreadContext
Drops file in Program Files directory
Unsigned PE
Enumerates physical storage devices
Program crash
NSIS installer
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: MapViewOfSection
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-04 19:01
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
NSIS installer
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-04 19:01
Reported
2023-12-04 19:03
Platform
win7-20231130-en
Max time kernel
145s
Max time network
150s
Command Line
Signatures
NanoCore
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2185821622-4133679102-1697169727-1000\Software\Microsoft\Windows\CurrentVersion\Run\pluuqyyiee = "C:\\Users\\Admin\\AppData\\Roaming\\ueeajjsoxxhdd\\miirbwwgp.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\gpaxjkfx.exe\" " | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\IMAP Subsystem = "C:\\Program Files (x86)\\IMAP Subsystem\\imapss.exe" | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2232 set thread context of 2216 | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\IMAP Subsystem\imapss.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
| File opened for modification | C:\Program Files (x86)\IMAP Subsystem\imapss.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe
"C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe"
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
"C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe"
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
"C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.4.4:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.8.8:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.8.8:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.4.4:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.8.8:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.8.8:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.4.4:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.8.8:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.8.8:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.4.4:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
| US | 8.8.8.8:53 | multipleentry90dayscontroller.homingbeacon.net | udp |
Files
\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
| MD5 | dcb26c9bfc1b5d7ce5d51c3b87c37daa |
| SHA1 | 824e47ae0d2ef729977f162c019aba515575eabf |
| SHA256 | cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d |
| SHA512 | de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35 |
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
| MD5 | dcb26c9bfc1b5d7ce5d51c3b87c37daa |
| SHA1 | 824e47ae0d2ef729977f162c019aba515575eabf |
| SHA256 | cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d |
| SHA512 | de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35 |
memory/2232-6-0x0000000000400000-0x0000000000431000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
| MD5 | dcb26c9bfc1b5d7ce5d51c3b87c37daa |
| SHA1 | 824e47ae0d2ef729977f162c019aba515575eabf |
| SHA256 | cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d |
| SHA512 | de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35 |
C:\Users\Admin\AppData\Local\Temp\xdxmt.s
| MD5 | f4aa88a2bdd058cf0f9263c8d9207102 |
| SHA1 | 399a192bbac02ec52cfee904aa1ee2fad0369aad |
| SHA256 | 2bcb37bd3f65d6135c329e502c2ef0909572c3fa480947cc6fe23252d41cdf33 |
| SHA512 | 9e3428b01280b92af142db29b9c9ca6ede2a210a8617190bbecaf7504c661f6cab66d10926dac49b9864417f9667a867109fd312f012f9a487388a622bde80de |
\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
| MD5 | dcb26c9bfc1b5d7ce5d51c3b87c37daa |
| SHA1 | 824e47ae0d2ef729977f162c019aba515575eabf |
| SHA256 | cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d |
| SHA512 | de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35 |
memory/2216-11-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2216-15-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2232-14-0x0000000000400000-0x0000000000431000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
| MD5 | dcb26c9bfc1b5d7ce5d51c3b87c37daa |
| SHA1 | 824e47ae0d2ef729977f162c019aba515575eabf |
| SHA256 | cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d |
| SHA512 | de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35 |
memory/2216-16-0x0000000000400000-0x000000000044A000-memory.dmp
memory/2216-17-0x0000000074280000-0x000000007482B000-memory.dmp
memory/2216-19-0x0000000074280000-0x000000007482B000-memory.dmp
memory/2216-20-0x0000000001CB0000-0x0000000001CF0000-memory.dmp
memory/2216-18-0x0000000001CB0000-0x0000000001CF0000-memory.dmp
C:\Program Files (x86)\IMAP Subsystem\imapss.exe
| MD5 | dcb26c9bfc1b5d7ce5d51c3b87c37daa |
| SHA1 | 824e47ae0d2ef729977f162c019aba515575eabf |
| SHA256 | cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d |
| SHA512 | de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35 |
memory/2216-24-0x0000000074280000-0x000000007482B000-memory.dmp
memory/2216-25-0x0000000074280000-0x000000007482B000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-04 19:01
Reported
2023-12-04 19:03
Platform
win10v2004-20231130-en
Max time kernel
125s
Max time network
50s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1791582586-1997866593-3795608343-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\pluuqyyiee = "C:\\Users\\Admin\\AppData\\Roaming\\ueeajjsoxxhdd\\miirbwwgp.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\gpaxjkfx.exe\" " | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | N/A |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4100 wrote to memory of 4600 | N/A | C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe |
| PID 4100 wrote to memory of 4600 | N/A | C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe |
| PID 4100 wrote to memory of 4600 | N/A | C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe |
| PID 4600 wrote to memory of 2160 | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe |
| PID 4600 wrote to memory of 2160 | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe |
| PID 4600 wrote to memory of 2160 | N/A | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe | C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe
"C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe"
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
"C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe"
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
"C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4600 -ip 4600
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4600 -s 652
Network
Files
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
| MD5 | dcb26c9bfc1b5d7ce5d51c3b87c37daa |
| SHA1 | 824e47ae0d2ef729977f162c019aba515575eabf |
| SHA256 | cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d |
| SHA512 | de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35 |
C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe
| MD5 | dcb26c9bfc1b5d7ce5d51c3b87c37daa |
| SHA1 | 824e47ae0d2ef729977f162c019aba515575eabf |
| SHA256 | cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d |
| SHA512 | de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35 |
memory/4600-5-0x0000000000400000-0x0000000000431000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\xdxmt.s
| MD5 | f4aa88a2bdd058cf0f9263c8d9207102 |
| SHA1 | 399a192bbac02ec52cfee904aa1ee2fad0369aad |
| SHA256 | 2bcb37bd3f65d6135c329e502c2ef0909572c3fa480947cc6fe23252d41cdf33 |
| SHA512 | 9e3428b01280b92af142db29b9c9ca6ede2a210a8617190bbecaf7504c661f6cab66d10926dac49b9864417f9667a867109fd312f012f9a487388a622bde80de |