Analysis Overview
SHA256
74a42ffbfcfe93903cae0dc8cdf2267171b8fd2efe82d14962cb2b7586126d7e
Threat Level: Likely malicious
The file e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118 was found to be: Likely malicious.
Malicious Activity Summary
Modifies AppInit DLL entries
Deletes itself
Loads dropped DLL
UPX packed file
Executes dropped EXE
Drops file in System32 directory
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-07 00:04
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 00:04
Reported
2024-04-07 00:07
Platform
win7-20240221-en
Max time kernel
150s
Max time network
124s
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\zesttnsk.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_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 |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\zesttns.dll | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
| File created | C:\Windows\SysWOW64\zesttnsk.exe | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\zesttnsk.exe | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe"
C:\Windows\SysWOW64\zesttnsk.exe
C:\Windows\system32\zesttnsk.exe ˜‰
C:\Windows\SysWOW64\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe.bat
Network
Files
memory/460-0-0x0000000000400000-0x000000000040F000-memory.dmp
\Windows\SysWOW64\zesttnsk.exe
| MD5 | e39b7454e8ad23a60bd64e79a97b6229 |
| SHA1 | ecbfe1e129211aa5be50bb8861d0daff24e38f88 |
| SHA256 | 74a42ffbfcfe93903cae0dc8cdf2267171b8fd2efe82d14962cb2b7586126d7e |
| SHA512 | f279a23ca67165af46bbb611db93150cde62e2020700367e4ac1789f3d870b9dfb176e358db95f1f4fa7e850ccc40b22ddca7df7e14aa5a0a9e4fc5629036329 |
memory/460-10-0x0000000000030000-0x000000000003F000-memory.dmp
memory/2064-11-0x0000000000400000-0x000000000040F000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe.bat
| MD5 | 3ce37db588076badc1f567e5122401ef |
| SHA1 | b97592cad2b384ccc5d2e17b09d9e88e33e8d629 |
| SHA256 | a62f6bc75ffd35418db1a0e68f60c4bd1fbe505b1ec322327325f6df5f4ea9aa |
| SHA512 | 51f5c2e000e6bf8d7248500d914dfeb921e8049b8458ae53cd003c82027776aa72cc0b3d2277bae0169687cab8b80ad3b35a9cacb0021a61043a49ac1eb26619 |
memory/460-19-0x0000000000400000-0x000000000040F000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-07 00:04
Reported
2024-04-07 00:07
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\zesttnsk.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 opened for modification | C:\Windows\SysWOW64\zesttnsk.exe | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
| File created | C:\Windows\SysWOW64\zesttns.dll | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
| File created | C:\Windows\SysWOW64\zesttnsk.exe | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4864 wrote to memory of 392 | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | C:\Windows\SysWOW64\zesttnsk.exe |
| PID 4864 wrote to memory of 392 | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | C:\Windows\SysWOW64\zesttnsk.exe |
| PID 4864 wrote to memory of 392 | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | C:\Windows\SysWOW64\zesttnsk.exe |
| PID 4864 wrote to memory of 3016 | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4864 wrote to memory of 3016 | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4864 wrote to memory of 3016 | N/A | C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe"
C:\Windows\SysWOW64\zesttnsk.exe
C:\Windows\system32\zesttnsk.exe ˜‰
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_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 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 4.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 150.1.37.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 105.83.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 169.253.116.51.in-addr.arpa | udp |
Files
memory/4864-0-0x0000000000400000-0x000000000040F000-memory.dmp
C:\Windows\SysWOW64\zesttnsk.exe
| MD5 | e39b7454e8ad23a60bd64e79a97b6229 |
| SHA1 | ecbfe1e129211aa5be50bb8861d0daff24e38f88 |
| SHA256 | 74a42ffbfcfe93903cae0dc8cdf2267171b8fd2efe82d14962cb2b7586126d7e |
| SHA512 | f279a23ca67165af46bbb611db93150cde62e2020700367e4ac1789f3d870b9dfb176e358db95f1f4fa7e850ccc40b22ddca7df7e14aa5a0a9e4fc5629036329 |
memory/4864-8-0x0000000000400000-0x000000000040F000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\e39b7454e8ad23a60bd64e79a97b6229_JaffaCakes118.exe.bat
| MD5 | 3ce37db588076badc1f567e5122401ef |
| SHA1 | b97592cad2b384ccc5d2e17b09d9e88e33e8d629 |
| SHA256 | a62f6bc75ffd35418db1a0e68f60c4bd1fbe505b1ec322327325f6df5f4ea9aa |
| SHA512 | 51f5c2e000e6bf8d7248500d914dfeb921e8049b8458ae53cd003c82027776aa72cc0b3d2277bae0169687cab8b80ad3b35a9cacb0021a61043a49ac1eb26619 |
memory/392-10-0x0000000000400000-0x000000000040F000-memory.dmp