Analysis Overview
SHA256
91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f
Threat Level: Known bad
The file 91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f was found to be: Known bad.
Malicious Activity Summary
Isrstealer family
ISR Stealer
ISR Stealer Payload
UPX packed file
Reads user/profile data of web browsers
Suspicious use of SetThreadContext
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-03-12 07:59
Signatures
ISR Stealer Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Isrstealer family
Analysis: behavioral1
Detonation Overview
Submitted
2022-03-12 07:59
Reported
2022-03-12 09:13
Platform
win7-20220310-en
Max time kernel
4294178s
Max time network
130s
Command Line
Signatures
ISR Stealer
ISR Stealer Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Reads user/profile data of web browsers
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1428 set thread context of 1808 | N/A | C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe | C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe |
| PID 1808 set thread context of 1780 | N/A | C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe | C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe |
| PID 1808 set thread context of 1100 | N/A | C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe | C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe
"C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe"
C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe
"C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe"
C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\fwzjTKh8w9.ini"
C:\Windows\Microsoft.net\Framework\v2.0.50727\regasm.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\jQCDLrIz9J.ini"
Network
Files
memory/1428-54-0x0000000074DE1000-0x0000000074DE3000-memory.dmp
memory/1428-56-0x0000000000830000-0x0000000000831000-memory.dmp
memory/1428-55-0x00000000741D0000-0x000000007477B000-memory.dmp
memory/1428-57-0x00000000741D0000-0x000000007477B000-memory.dmp
memory/1808-58-0x0000000000400000-0x0000000000442000-memory.dmp
memory/1780-64-0x0000000000400000-0x0000000000453000-memory.dmp
memory/1780-67-0x0000000000400000-0x0000000000453000-memory.dmp
memory/1780-69-0x0000000000400000-0x0000000000453000-memory.dmp
memory/1780-70-0x0000000000400000-0x0000000000453000-memory.dmp
memory/1780-71-0x0000000000400000-0x0000000000453000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-03-12 07:59
Reported
2022-03-12 09:13
Platform
win10v2004-20220310-en
Max time kernel
127s
Max time network
155s
Command Line
Signatures
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2212 wrote to memory of 3908 | N/A | C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe | C:\Windows\SysWOW64\fondue.exe |
| PID 2212 wrote to memory of 3908 | N/A | C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe | C:\Windows\SysWOW64\fondue.exe |
| PID 2212 wrote to memory of 3908 | N/A | C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe | C:\Windows\SysWOW64\fondue.exe |
| PID 3908 wrote to memory of 1468 | N/A | C:\Windows\SysWOW64\fondue.exe | C:\Windows\system32\FonDUE.EXE |
| PID 3908 wrote to memory of 1468 | N/A | C:\Windows\SysWOW64\fondue.exe | C:\Windows\system32\FonDUE.EXE |
Processes
C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe
"C:\Users\Admin\AppData\Local\Temp\91ed0d89cfea28fa7889128593cb541b3da9088cf5ea5b8b09047f765b275d9f.exe"
C:\Windows\SysWOW64\fondue.exe
"C:\Windows\system32\fondue.exe" /enable-feature:NetFx3 /caller-name:mscoreei.dll
C:\Windows\system32\FonDUE.EXE
"C:\Windows\sysnative\FonDUE.EXE" /enable-feature:NetFx3 /caller-name:mscoreei.dll
Network
| Country | Destination | Domain | Proto |
| NL | 8.238.21.254:80 | tcp | |
| NL | 8.238.21.254:80 | tcp | |
| US | 104.18.21.226:80 | tcp | |
| US | 104.18.20.226:80 | tcp |