Analysis Overview
SHA256
e2169a586ecb0a42d5b26ed7de8e3714f64652a26c89ccb883c7128224785dab
Threat Level: Likely malicious
The file e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118 was found to be: Likely malicious.
Malicious Activity Summary
Modifies AppInit DLL entries
UPX packed file
Executes dropped EXE
Loads dropped DLL
Deletes itself
Drops file in System32 directory
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-07 23:19
Signatures
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| 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
2024-04-07 23:19
Reported
2024-04-07 23:21
Platform
win7-20240215-en
Max time kernel
150s
Max time network
121s
Command Line
Signatures
Modifies AppInit DLL entries
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\lenyunsk.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | 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 |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\lenyuns.dll | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | N/A |
| File created | C:\Windows\SysWOW64\lenyunsk.exe | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\lenyunsk.exe | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe"
C:\Windows\SysWOW64\lenyunsk.exe
C:\Windows\system32\lenyunsk.exe ˜‰
C:\Windows\SysWOW64\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe.bat
Network
Files
memory/1804-0-0x0000000000400000-0x0000000000410000-memory.dmp
\Windows\SysWOW64\lenyunsk.exe
| MD5 | e6185d4b4ff10b58f876babe5db6bfe6 |
| SHA1 | ad39f69563dac75355d8cf42f733d85da7c48aee |
| SHA256 | e2169a586ecb0a42d5b26ed7de8e3714f64652a26c89ccb883c7128224785dab |
| SHA512 | b965ef57212a48c514c229c5da784bd96734d1ece121c31fd8b7365ba7eae208e6cd0b38bff9c87bdd723606949c07f4e662a8f1210231f7d923bab585c93181 |
memory/1804-4-0x0000000000230000-0x0000000000240000-memory.dmp
memory/1804-11-0x0000000000230000-0x0000000000240000-memory.dmp
memory/2260-12-0x0000000000400000-0x0000000000410000-memory.dmp
memory/1804-13-0x0000000000400000-0x0000000000410000-memory.dmp
memory/1804-17-0x0000000000230000-0x0000000000240000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe.bat
| MD5 | 6933dc7d4e6e364ae8bc4650876f6499 |
| SHA1 | 6e0728e32a39fdf72847536b63042a43c698c6d9 |
| SHA256 | edf96aa2228fad182390c65d802910fd2e9c4280bc131bfe1a7865b5f65a37b0 |
| SHA512 | 33ba49e8ca8344cc3aabfcf5613839f693ca583348c724adce030e983800f1f12d2e535733cc1839a43e08690a8dfa45f557e10b1c189ad40452c00f97a9ab77 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-07 23:19
Reported
2024-04-07 23:21
Platform
win10v2004-20231215-en
Max time kernel
150s
Max time network
149s
Command Line
Signatures
Modifies AppInit DLL entries
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\lenyunsk.exe | 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 |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\lenyunsk.exe | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\lenyunsk.exe | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | N/A |
| File created | C:\Windows\SysWOW64\lenyuns.dll | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1568 wrote to memory of 2220 | N/A | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | C:\Windows\SysWOW64\lenyunsk.exe |
| PID 1568 wrote to memory of 2220 | N/A | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | C:\Windows\SysWOW64\lenyunsk.exe |
| PID 1568 wrote to memory of 2220 | N/A | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | C:\Windows\SysWOW64\lenyunsk.exe |
| PID 1568 wrote to memory of 4016 | N/A | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1568 wrote to memory of 4016 | N/A | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1568 wrote to memory of 4016 | N/A | C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe"
C:\Windows\SysWOW64\lenyunsk.exe
C:\Windows\system32\lenyunsk.exe ˜‰
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe.bat
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 76.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 159.113.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 130.118.77.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 178.223.142.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
Files
memory/1568-0-0x0000000000400000-0x0000000000410000-memory.dmp
C:\Windows\SysWOW64\lenyunsk.exe
| MD5 | e6185d4b4ff10b58f876babe5db6bfe6 |
| SHA1 | ad39f69563dac75355d8cf42f733d85da7c48aee |
| SHA256 | e2169a586ecb0a42d5b26ed7de8e3714f64652a26c89ccb883c7128224785dab |
| SHA512 | b965ef57212a48c514c229c5da784bd96734d1ece121c31fd8b7365ba7eae208e6cd0b38bff9c87bdd723606949c07f4e662a8f1210231f7d923bab585c93181 |
memory/1568-6-0x0000000000400000-0x0000000000410000-memory.dmp
memory/2220-7-0x0000000000400000-0x0000000000410000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\e6185d4b4ff10b58f876babe5db6bfe6_JaffaCakes118.exe.bat
| MD5 | 6933dc7d4e6e364ae8bc4650876f6499 |
| SHA1 | 6e0728e32a39fdf72847536b63042a43c698c6d9 |
| SHA256 | edf96aa2228fad182390c65d802910fd2e9c4280bc131bfe1a7865b5f65a37b0 |
| SHA512 | 33ba49e8ca8344cc3aabfcf5613839f693ca583348c724adce030e983800f1f12d2e535733cc1839a43e08690a8dfa45f557e10b1c189ad40452c00f97a9ab77 |