Analysis Overview
SHA256
d7a77526e580263c2374f51a2a960d7494d12d489859e1ab421e3bba7e558b4b
Threat Level: Known bad
The file 24042024_1016_2023_TAX_ORGANIZER_s.zip was found to be: Known bad.
Malicious Activity Summary
Remcos
Adds Run key to start application
Suspicious use of NtCreateThreadExHideFromDebugger
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-24 02:17
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-24 02:17
Reported
2024-04-24 02:19
Platform
win7-20240221-en
Max time kernel
147s
Max time network
144s
Command Line
Signatures
Remcos
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\*Chrome = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\HEARTB.dll,EntryPoint" | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious use of NtCreateThreadExHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe
"C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe"
C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe
"C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f & exit
C:\Windows\SysWOW64\reg.exe
reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | faststaynow.duckdns.org | udp |
| LV | 46.183.222.118:5057 | faststaynow.duckdns.org | tcp |
| US | 8.8.8.8:53 | geoplugin.net | udp |
| NL | 178.237.33.50:80 | geoplugin.net | tcp |
Files
memory/2492-0-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2492-2-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2500-1-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2492-4-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2500-5-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp
memory/2500-7-0x0000000000250000-0x0000000000251000-memory.dmp
memory/2500-9-0x0000000000250000-0x0000000000251000-memory.dmp
memory/2492-11-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2500-12-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-13-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-14-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-15-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-16-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-17-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-18-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-19-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-21-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-22-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-23-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-24-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-25-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-26-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-27-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-28-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-29-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-30-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-31-0x00000000001C0000-0x0000000000242000-memory.dmp
memory/2500-32-0x00000000001C0000-0x0000000000242000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-24 02:17
Reported
2024-04-24 02:19
Platform
win10v2004-20240412-en
Max time kernel
147s
Max time network
145s
Command Line
Signatures
Remcos
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1132431369-515282257-1998160155-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*Chrome = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\HEARTB.dll,EntryPoint" | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious use of NtCreateThreadExHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe
"C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe"
C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe
"C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\Tax Organizer.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f & exit
C:\Windows\SysWOW64\reg.exe
reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 4.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 156.33.209.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.114.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | faststaynow.duckdns.org | udp |
| LV | 46.183.222.118:5057 | faststaynow.duckdns.org | tcp |
| US | 8.8.8.8:53 | geoplugin.net | udp |
| NL | 178.237.33.50:80 | geoplugin.net | tcp |
| US | 8.8.8.8:53 | 118.222.183.46.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.33.237.178.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.251.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.236.111.52.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 | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
Files
memory/2088-0-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2088-1-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2088-3-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/4232-2-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/4232-7-0x0000000000410000-0x0000000000492000-memory.dmp
memory/2088-6-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2088-5-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/4232-8-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-9-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-10-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-12-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-11-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-13-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-15-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-16-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-17-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-18-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-19-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-20-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-21-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-25-0x0000000000410000-0x0000000000492000-memory.dmp
memory/4232-26-0x0000000000410000-0x0000000000492000-memory.dmp
Analysis: behavioral3
Detonation Overview
Submitted
2024-04-24 02:17
Reported
2024-04-24 02:19
Platform
win7-20240221-en
Max time kernel
118s
Max time network
123s
Command Line
Signatures
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1152 wrote to memory of 1772 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1152 wrote to memory of 1772 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1152 wrote to memory of 1772 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1152 wrote to memory of 1772 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1152 wrote to memory of 1772 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1152 wrote to memory of 1772 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
| PID 1152 wrote to memory of 1772 | N/A | C:\Windows\system32\regsvr32.exe | C:\Windows\SysWOW64\regsvr32.exe |
Processes
C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\g2m.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\g2m.dll
Network
Files
memory/1772-0-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/1772-1-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/1772-2-0x00000000679E0000-0x0000000068086000-memory.dmp
Analysis: behavioral4
Detonation Overview
Submitted
2024-04-24 02:17
Reported
2024-04-24 02:19
Platform
win10v2004-20240412-en
Max time kernel
147s
Max time network
145s
Command Line
Signatures
Remcos
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*Chrome = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\HEARTB.dll,EntryPoint" | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious use of NtCreateThreadExHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\g2m.dll
C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\2023_TAX_ORGANIZER\g2m.dll
C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\SysWOW64\regsvr32.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f & exit
C:\Windows\SysWOW64\reg.exe
reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| 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 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.32.209.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.114.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | faststaynow.duckdns.org | udp |
| LV | 46.183.222.118:5057 | faststaynow.duckdns.org | tcp |
| US | 8.8.8.8:53 | 118.222.183.46.in-addr.arpa | udp |
| US | 8.8.8.8:53 | geoplugin.net | udp |
| NL | 178.237.33.50:80 | geoplugin.net | tcp |
| US | 8.8.8.8:53 | 50.33.237.178.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 65.139.73.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.251.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 30.243.111.52.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 | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
Files
memory/2092-0-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/1812-2-0x0000000000B10000-0x0000000000B11000-memory.dmp
memory/2092-1-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2092-5-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/2092-4-0x00000000679E0000-0x0000000068086000-memory.dmp
memory/1812-7-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-6-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-9-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-10-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-11-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-12-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-13-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-14-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-16-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-17-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-18-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-19-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-20-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-21-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-22-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-23-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-25-0x0000000000A80000-0x0000000000B02000-memory.dmp
memory/1812-26-0x0000000000A80000-0x0000000000B02000-memory.dmp