Analysis Overview
SHA256
b58b79e854bc26f935d23d1d665021c1551be54ef1af660a8d4c37ef4111aec3
Threat Level: Shows suspicious behavior
The file 8157b685c864ed653938a86a18c61aeb_JaffaCakes118 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Deletes itself
Indicator Removal: File Deletion
Drops file in System32 directory
Unsigned PE
System Location Discovery: System Language Discovery
Checks processor information in registry
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-10-31 03:02
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-10-31 03:02
Reported
2024-10-31 03:26
Platform
win7-20240903-en
Max time kernel
149s
Max time network
119s
Command Line
Signatures
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\ooaaya.exe | N/A |
Indicator Removal: File Deletion
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\ooaaya.exe | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\ooaaya.exe | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\ooaaya.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\SysWOW64\ooaaya.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\SysWOW64\ooaaya.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2888 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2888 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2888 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2888 wrote to memory of 2328 | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe"
C:\Windows\SysWOW64\ooaaya.exe
C:\Windows\SysWOW64\ooaaya.exe
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\8157B6~1.EXE > nul
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
Files
C:\Windows\SysWOW64\ooaaya.exe
| MD5 | 8157b685c864ed653938a86a18c61aeb |
| SHA1 | c8de3b88ba1c2cdcfce054b2a18f08dbc61d4753 |
| SHA256 | b58b79e854bc26f935d23d1d665021c1551be54ef1af660a8d4c37ef4111aec3 |
| SHA512 | a23e173881051ded42aea6353dc8a555c774a88750c9b9599b91e49c9a19d34f670eacbf160612ade2375b5eb5efa21102f3d60bd02fb05c787f81afa72ec3d1 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-10-31 03:02
Reported
2024-10-31 03:27
Platform
win10v2004-20241007-en
Max time kernel
149s
Max time network
150s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\kcuyyg.exe | N/A |
Indicator Removal: File Deletion
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\kcuyyg.exe | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\kcuyyg.exe | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\kcuyyg.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\SysWOW64\kcuyyg.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\SysWOW64\kcuyyg.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4216 wrote to memory of 4152 | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4216 wrote to memory of 4152 | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4216 wrote to memory of 4152 | N/A | C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8157b685c864ed653938a86a18c61aeb_JaffaCakes118.exe"
C:\Windows\SysWOW64\kcuyyg.exe
C:\Windows\SysWOW64\kcuyyg.exe
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\8157B6~1.EXE > nul
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 74.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | 197.87.175.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 69.190.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | 10.27.171.150.in-addr.arpa | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
| US | 8.8.8.8:53 | xiaohuei1.3322.org | udp |
Files
C:\Windows\SysWOW64\kcuyyg.exe
| MD5 | 8157b685c864ed653938a86a18c61aeb |
| SHA1 | c8de3b88ba1c2cdcfce054b2a18f08dbc61d4753 |
| SHA256 | b58b79e854bc26f935d23d1d665021c1551be54ef1af660a8d4c37ef4111aec3 |
| SHA512 | a23e173881051ded42aea6353dc8a555c774a88750c9b9599b91e49c9a19d34f670eacbf160612ade2375b5eb5efa21102f3d60bd02fb05c787f81afa72ec3d1 |