Analysis Overview
SHA256
d5c62df11d9b96104bdb9fd411142d931c621740b90c2ad790802f244251a0c0
Threat Level: Likely malicious
The file e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118 was found to be: Likely malicious.
Malicious Activity Summary
Modifies AppInit DLL entries
Executes dropped EXE
UPX packed file
Deletes itself
Loads dropped DLL
Drops file in System32 directory
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-06 14:45
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
2024-04-06 14:45
Reported
2024-04-06 14:48
Platform
win7-20240221-en
Max time kernel
150s
Max time network
122s
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\rexljehk.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_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\rexljeh.dll | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | N/A |
| File created | C:\Windows\SysWOW64\rexljehk.exe | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\rexljehk.exe | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe"
C:\Windows\SysWOW64\rexljehk.exe
C:\Windows\system32\rexljehk.exe ˜‰
C:\Windows\SysWOW64\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe.bat
Network
Files
memory/1660-0-0x0000000000400000-0x0000000000410000-memory.dmp
\Windows\SysWOW64\rexljehk.exe
| MD5 | e2c5b96c2e7d8eab8c67326a13fe449a |
| SHA1 | 4518bfd39e40e6287fc2d2783a4d43b6ef652cc6 |
| SHA256 | d5c62df11d9b96104bdb9fd411142d931c621740b90c2ad790802f244251a0c0 |
| SHA512 | 16eb8502660bbb3f3ce19e56121461cc2737eb6fdb3b33aad22a70a207093075f63e4d304a995b7dc03b85455b65a9a9d3336846f00a87de1f3b112de69cec11 |
memory/1660-4-0x0000000000230000-0x0000000000240000-memory.dmp
memory/1660-11-0x0000000000400000-0x0000000000410000-memory.dmp
memory/1940-12-0x0000000000400000-0x0000000000410000-memory.dmp
memory/1660-15-0x0000000000230000-0x0000000000240000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe.bat
| MD5 | 85bb108f9917b9bce9139a4e3dc136a2 |
| SHA1 | cdccce71f6fbb0831781e79ed14a7853c007b0ba |
| SHA256 | 03cc47917cacaf345e08cc77f98cbda58d6b8521c09b1e96643a536e0e6fc6fb |
| SHA512 | 1615a990b5fadab1b781049d08f8fd3ee920fab02ef4400f31c91b3aee7c7522613bc4f99cfe2d2c1be5116f20ad2165cc20d08e6a63cc552be4185d63ebe430 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-06 14:45
Reported
2024-04-06 14:48
Platform
win10v2004-20240226-en
Max time kernel
150s
Max time network
152s
Command Line
Signatures
Modifies AppInit DLL entries
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rexljehk.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\rexljehk.exe | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\rexljehk.exe | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | N/A |
| File created | C:\Windows\SysWOW64\rexljeh.dll | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2220 wrote to memory of 1908 | N/A | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | C:\Windows\SysWOW64\rexljehk.exe |
| PID 2220 wrote to memory of 1908 | N/A | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | C:\Windows\SysWOW64\rexljehk.exe |
| PID 2220 wrote to memory of 1908 | N/A | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | C:\Windows\SysWOW64\rexljehk.exe |
| PID 2220 wrote to memory of 3352 | N/A | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2220 wrote to memory of 3352 | N/A | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2220 wrote to memory of 3352 | N/A | C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe"
C:\Windows\SysWOW64\rexljehk.exe
C:\Windows\system32\rexljehk.exe ˜‰
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe.bat
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.143.109.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.173.189.20.in-addr.arpa | udp |
Files
memory/2220-0-0x0000000000400000-0x0000000000410000-memory.dmp
C:\Windows\SysWOW64\rexljehk.exe
| MD5 | e2c5b96c2e7d8eab8c67326a13fe449a |
| SHA1 | 4518bfd39e40e6287fc2d2783a4d43b6ef652cc6 |
| SHA256 | d5c62df11d9b96104bdb9fd411142d931c621740b90c2ad790802f244251a0c0 |
| SHA512 | 16eb8502660bbb3f3ce19e56121461cc2737eb6fdb3b33aad22a70a207093075f63e4d304a995b7dc03b85455b65a9a9d3336846f00a87de1f3b112de69cec11 |
memory/2220-6-0x0000000000400000-0x0000000000410000-memory.dmp
memory/1908-7-0x0000000000400000-0x0000000000410000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\e2c5b96c2e7d8eab8c67326a13fe449a_JaffaCakes118.exe.bat
| MD5 | 85bb108f9917b9bce9139a4e3dc136a2 |
| SHA1 | cdccce71f6fbb0831781e79ed14a7853c007b0ba |
| SHA256 | 03cc47917cacaf345e08cc77f98cbda58d6b8521c09b1e96643a536e0e6fc6fb |
| SHA512 | 1615a990b5fadab1b781049d08f8fd3ee920fab02ef4400f31c91b3aee7c7522613bc4f99cfe2d2c1be5116f20ad2165cc20d08e6a63cc552be4185d63ebe430 |