Analysis Overview
SHA256
8555743631267a78de02ae65d5454e3bfc2ac6c5336dab259fcff5316aba840c
Threat Level: Known bad
The file Client.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Executes dropped EXE
Unsigned PE
Suspicious use of SetWindowsHookEx
Uses Task Scheduler COM API
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-08 11:56
Signatures
Quasar family
Quasar payload
| 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 |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-08 11:56
Reported
2024-01-08 11:58
Platform
win7-20231129-en
Max time kernel
148s
Max time network
150s
Command Line
Signatures
Quasar RAT
Quasar payload
| 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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | s4.v100.vip | udp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
Files
memory/2240-0-0x0000000000F80000-0x00000000012A4000-memory.dmp
memory/2240-1-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp
memory/2240-2-0x0000000000B50000-0x0000000000BD0000-memory.dmp
memory/2868-9-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp
memory/2868-10-0x000000001B280000-0x000000001B300000-memory.dmp
memory/2240-8-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp
memory/2868-7-0x0000000000FD0000-0x00000000012F4000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | edfb9f3a3c6d6cb393683d9d2200b51d |
| SHA1 | ea5348dc526cea50caf687002313cce76ad87e87 |
| SHA256 | 83e93e2987466d68f62e918018e15844625708a8c4fb267c4d375cc2c91c25e4 |
| SHA512 | a32a99d0dedd8330e8ed6c0fdb93b4f86bd5c9e2a9ee795a070a294d07480456704c810ff282c233e6e479f62a69437e1d83dfac274aad0798745d04ef2e1bee |
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | f9116b0b62ae7417dbd550152df86a70 |
| SHA1 | 8e6602bf208975f52055ba19b4c730bc1920f09b |
| SHA256 | fa220355fedd412ffba9c3e8036ba1183d1347097ae2e9909376b3f6d8183f30 |
| SHA512 | 6334a7e03fa817661c9f36ff2e16bf37132bd3d5cc00cccf57c962b25be80049e3a30fdb2f7681fa3d4fe9b2d58422db9e42946a038c8896a080e26de9a1929d |
memory/2868-11-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp
memory/2868-12-0x000000001B280000-0x000000001B300000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-08 11:56
Reported
2024-01-08 11:58
Platform
win10v2004-20231215-en
Max time kernel
147s
Max time network
126s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4908 wrote to memory of 2076 | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4908 wrote to memory of 2076 | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4908 wrote to memory of 3164 | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4908 wrote to memory of 3164 | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3164 wrote to memory of 3752 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3164 wrote to memory of 3752 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 208.194.73.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 203.178.17.96.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 | s4.v100.vip | udp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.136.104.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 114.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 145.71.91.104.in-addr.arpa | udp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.241.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| CN | 43.248.117.189:27923 | s4.v100.vip | tcp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 181.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | 197.178.17.96.in-addr.arpa | udp |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| CN | 43.248.117.189:27923 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| GB | 88.221.135.211:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| GB | 88.221.135.211:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 96.17.178.197:80 | tcp | |
| GB | 88.221.135.211:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| GB | 88.221.135.211:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| CN | 43.248.117.189:27923 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| GB | 96.17.178.195:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| GB | 88.221.135.211:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| GB | 88.221.135.211:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| GB | 88.221.135.211:80 | tcp | |
| GB | 88.221.135.211:80 | tcp | |
| GB | 88.221.135.211:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp |
Files
memory/4908-0-0x0000000000040000-0x0000000000364000-memory.dmp
memory/4908-2-0x000000001B000000-0x000000001B010000-memory.dmp
memory/4908-1-0x00007FFBE3C80000-0x00007FFBE4741000-memory.dmp
memory/3164-9-0x00007FFBE3C80000-0x00007FFBE4741000-memory.dmp
memory/4908-10-0x00007FFBE3C80000-0x00007FFBE4741000-memory.dmp
memory/3164-11-0x000000001B8D0000-0x000000001B8E0000-memory.dmp
memory/3164-12-0x000000001BEE0000-0x000000001BF30000-memory.dmp
memory/3164-13-0x000000001BFF0000-0x000000001C0A2000-memory.dmp
memory/3164-14-0x00007FFBE3C80000-0x00007FFBE4741000-memory.dmp
memory/3164-15-0x000000001B8D0000-0x000000001B8E0000-memory.dmp