Analysis Overview
SHA256
31eb4492dbdb099fae987f89fdb66fcd2a79367d6112a7f4a3ae47fdfa9e62d5
Threat Level: Known bad
The file 8ffb95d5e237a22a2773b17e34a4c6b0 was found to be: Known bad.
Malicious Activity Summary
Detect XtremeRAT payload
XtremeRAT
Modifies Installed Components in the registry
Loads dropped DLL
Executes dropped EXE
UPX packed file
Drops desktop.ini file(s)
Adds Run key to start application
Suspicious use of SetThreadContext
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Suspicious use of FindShellTrayWindow
Suspicious behavior: EnumeratesProcesses
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-26 21:28
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-26 21:28
Reported
2024-01-07 05:15
Platform
win7-20231215-en
Max time kernel
147s
Max time network
126s
Command Line
Signatures
Detect XtremeRAT payload
| Description | Indicator | Process | Target |
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XtremeRAT
Modifies Installed Components in the registry
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{PF38VKJN-7V8U-658N-NM1O-1B1M1TAV43R7} | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{PF38VKJN-7V8U-658N-NM1O-1B1M1TAV43R7}\StubPath = "C:\\Windows\\InstallDir\\skypa.exe restart" | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{PF38VKJN-7V8U-658N-NM1O-1B1M1TAV43R7} | C:\Windows\SysWOW64\svchost.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{PF38VKJN-7V8U-658N-NM1O-1B1M1TAV43R7}\StubPath = "C:\\Windows\\InstallDir\\skypa.exe restart" | C:\Windows\SysWOW64\svchost.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{PF38VKJN-7V8U-658N-NM1O-1B1M1TAV43R7} | C:\Windows\InstallDir\skypa.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{PF38VKJN-7V8U-658N-NM1O-1B1M1TAV43R7}\StubPath = "C:\\Windows\\InstallDir\\skypa.exe restart" | C:\Windows\InstallDir\skypa.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{PF38VKJN-7V8U-658N-NM1O-1B1M1TAV43R7} | C:\Windows\SysWOW64\explorer.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{PF38VKJN-7V8U-658N-NM1O-1B1M1TAV43R7}\StubPath = "C:\\Windows\\InstallDir\\skypa.exe restart" | C:\Windows\SysWOW64\explorer.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\InstallDir\skypa.exe | N/A |
| N/A | N/A | C:\Windows\InstallDir\skypa.exe | N/A |
| N/A | N/A | C:\Windows\InstallDir\skypa.exe | N/A |
| N/A | N/A | C:\Windows\InstallDir\skypa.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\explorer.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\explorer.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AVG = "C:\\Windows\\InstallDir\\skypa.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\AVG = "C:\\Windows\\InstallDir\\skypa.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AVG = "C:\\Windows\\InstallDir\\skypa.exe" | C:\Windows\InstallDir\skypa.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\AVG = "C:\\Windows\\InstallDir\\skypa.exe" | C:\Windows\InstallDir\skypa.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AVG = "C:\\Windows\\InstallDir\\skypa.exe" | C:\Windows\SysWOW64\explorer.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\AVG = "C:\\Windows\\InstallDir\\skypa.exe" | C:\Windows\SysWOW64\explorer.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AVG = "C:\\Windows\\InstallDir\\skypa.exe" | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\AVG = "C:\\Windows\\InstallDir\\skypa.exe" | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe | N/A |
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini | C:\Windows\SysWOW64\explorer.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3068 set thread context of 2004 | N/A | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe |
| PID 2640 set thread context of 2860 | N/A | C:\Windows\InstallDir\skypa.exe | C:\Windows\InstallDir\skypa.exe |
| PID 2860 set thread context of 544 | N/A | C:\Windows\InstallDir\skypa.exe | C:\Windows\SysWOW64\explorer.exe |
| PID 1968 set thread context of 1684 | N/A | C:\Windows\InstallDir\skypa.exe | C:\Windows\InstallDir\skypa.exe |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\InstallDir\ | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe | N/A |
| File opened for modification | C:\Windows\InstallDir\skypa.exe | C:\Windows\InstallDir\skypa.exe | N/A |
| File opened for modification | C:\Windows\InstallDir\ | C:\Windows\InstallDir\skypa.exe | N/A |
| File opened for modification | C:\Windows\InstallDir\skypa.exe | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe | N/A |
| File created | C:\Windows\InstallDir\skypa.exe | C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe | N/A |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\explorer.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\explorer.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\explorer.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\explorer.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\explorer.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe
"C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe"
C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe
C:\Users\Admin\AppData\Local\Temp\8ffb95d5e237a22a2773b17e34a4c6b0.exe
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\explorer.exe
explorer.exe
C:\Windows\InstallDir\skypa.exe
"C:\Windows\InstallDir\skypa.exe"
C:\Windows\InstallDir\skypa.exe
"C:\Windows\InstallDir\skypa.exe"
C:\Windows\InstallDir\skypa.exe
C:\Windows\InstallDir\skypa.exe
C:\Windows\SysWOW64\explorer.exe
explorer.exe
C:\Windows\InstallDir\skypa.exe
C:\Windows\InstallDir\skypa.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | sweetma198.no-ip.info | udp |
Files
memory/2004-2-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2004-1-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2004-0-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2004-4-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2004-7-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2004-10-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2004-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2004-18-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/3068-19-0x0000000023240000-0x000000002326A000-memory.dmp
memory/2004-14-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2004-12-0x0000000000C80000-0x0000000000CE9000-memory.dmp
C:\Windows\InstallDir\skypa.exe
| MD5 | 391211f48801d386ad55f2327543c4c0 |
| SHA1 | 5d77cd181341594311ce384b451ab9bdf4bb607b |
| SHA256 | 53fbae69f1cda07a6cc91fe4833c6f2a73178bcd5da3216514fc854c0ca5c2ef |
| SHA512 | b2dd1358f353192aab5a5aa2bbc762f1f28a1aacca21543a9a2c44d887bfcf8de36d5a524bd3b4f05a758ea12ec70784087fbb063d1d782410b5fe73169dbe89 |
memory/2672-28-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2856-32-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2856-40-0x0000000000C80000-0x0000000000CE9000-memory.dmp
memory/2856-34-0x0000000000C80000-0x0000000000CE9000-memory.dmp
\Windows\InstallDir\skypa.exe
| MD5 | 8ffb95d5e237a22a2773b17e34a4c6b0 |
| SHA1 | 7e74c23a6d66fc6ad4d6a5397642476af48735ad |
| SHA256 | 31eb4492dbdb099fae987f89fdb66fcd2a79367d6112a7f4a3ae47fdfa9e62d5 |
| SHA512 | e8a3c594e6d0009ad6cfe1f7d3341dcadac3fb536c001e0490c6b5f702abf904a30efc3964f797894c1aabbe03eb310d79ebf3e436b2a80c51dcc29de7f2aca8 |
memory/2856-46-0x0000000000C80000-0x0000000000CE9000-memory.dmp
C:\Windows\InstallDir\skypa.exe
| MD5 | 77602e679bc6f083bc49aae4f658adb5 |
| SHA1 | 21cf0e86ad3febf0da71444bb879399e0754032f |
| SHA256 | 4c35b58be0d9a61037790b82b7b9d5b08bf695af7e3a0c75ea2a3e5efb1cd359 |
| SHA512 | ee5b8a18f03673a53023a2f2d2d6178457c4111ab7a154e4fab6bdef23d1be2599a79271da5c7523f7ade151077eb86c070bb0f41d7a3f2cf42f6f4f025f31fa |
\??\PIPE\srvsvc
| MD5 | d41d8cd98f00b204e9800998ecf8427e |
| SHA1 | da39a3ee5e6b4b0d3255bfef95601890afd80709 |
| SHA256 | e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 |
| SHA512 | cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e |
\Windows\InstallDir\skypa.exe
| MD5 | 1ad8c36c519b748fbe1aa79b574573fa |
| SHA1 | d783363eeb161fbd096b5657c2a27480b3e1f79a |
| SHA256 | 44ca58e48755b2148b09dce0fcc79a4a87495110cb3c9a4b9fbfb1530c29ceaf |
| SHA512 | 8bc7fa99e860b07e478f4d1357c98f484ad649a2e2223deabfffe62350f68d0948669fdd503257bb891aa2c32b1d7d7c44fe6dfd4402e71ca3331b47d4b1b684 |
C:\Windows\InstallDir\skypa.exe
| MD5 | 37ae693d4a9a755b9c620bf5473bd3d1 |
| SHA1 | 54af2c11b8aae8d6cfe855b250f53a5051728215 |
| SHA256 | bbb5b65c4320858bbc4016265cfc49baf1bcff7b9495e4ec29c5576f5f638421 |
| SHA512 | 96c6eb3dad16b5c7e6e4300983501e390d38415b50515e6412c70b6af7046933aaa7b15edf12676f5ea530273bd83d5e3ed37ed926382f51c682e4570324607d |
memory/2640-51-0x0000000023240000-0x000000002326A000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\a24hcUtl1.cfg
| MD5 | 3c4d3cd283491acb2b8be880e6515e34 |
| SHA1 | 24a402254b7b16a007a334655e811fee25bfac61 |
| SHA256 | 077c026e8eaa149a9a0b3b2f361f1d5d90852bd082d40d5366f70a3b783100e5 |
| SHA512 | ec420ca447b53ec38b1ac879d8e03ad7f89babf8ce0f81d91d0befae0402f594e6a7f229763d6a3a1483a4d8658cdd5e581a7bf35d496c98402460d608a970c1 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\a24hcUtl1.xtr
| MD5 | 6426d400c96fb9ffef4eaa54f6647f4c |
| SHA1 | 70a37871aff432790b6adf7d3fc4eb929476e082 |
| SHA256 | 98bba0cf4c57ecd35b227f45e4aa6dd50ef7cfb1160235cc14687c96eb09fa3c |
| SHA512 | 2c8b4d3ab066cbfca6cf0c8d89d5044152b5e3d7100249cbedd1c816e3a4a94efc8bc6b79c1dab4bdf96e3ce476d6caccf625cfbe0aff3bf5e7a29dfcfa948c5 |
memory/544-76-0x0000000001610000-0x0000000001712000-memory.dmp
memory/544-77-0x0000000001610000-0x0000000001712000-memory.dmp
memory/544-79-0x0000000001610000-0x0000000001712000-memory.dmp
memory/544-81-0x0000000001610000-0x0000000001712000-memory.dmp
memory/544-82-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/544-85-0x0000000001610000-0x0000000001712000-memory.dmp
memory/544-87-0x0000000001610000-0x0000000001712000-memory.dmp
memory/544-86-0x0000000001610000-0x0000000001712000-memory.dmp
memory/544-88-0x0000000000130000-0x0000000000131000-memory.dmp
memory/544-89-0x0000000001610000-0x0000000001712000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\a24hcUtl1.dat
| MD5 | 84cad01fdb44ae58dbe6c3973dcd87f5 |
| SHA1 | 4700b42849fb35be323774820bf1bc8019d26c80 |
| SHA256 | 8b1f194be530240c18bf0b1ee0d038e750fab8b24c6bd25c864297e5ebb41fa6 |
| SHA512 | 6e10d3ec4724c1aca9ff3f6a26292ba80065d18e8e9395f1474c0a298008f25e312e2f7024e7d10aab3264764e69a25553cc20afd23090f83921d20e42b989ab |
memory/544-90-0x0000000001610000-0x0000000001712000-memory.dmp
memory/544-121-0x0000000000130000-0x0000000000131000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-26 21:28
Reported
2024-01-07 05:14
Platform
win10v2004-20231215-en
Max time network
7s
Command Line
Signatures
Processes
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 146.78.124.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 148.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| NL | 52.142.223.178:80 | tcp |