Analysis Overview
SHA256
6eaff3a3059d64fba8aaf22757cd51de82addb4f84f24f87aa3292a95d0825ca
Threat Level: Known bad
The file deed33d8537ad5384cd927b88df28494 was found to be: Known bad.
Malicious Activity Summary
Windows security bypass
Tofsee
Sets service image path in registry
Modifies Windows Firewall
Creates new service(s)
Executes dropped EXE
Deletes itself
Checks computer location settings
Suspicious use of SetThreadContext
Drops file in System32 directory
Launches sc.exe
Unsigned PE
Program crash
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-26 10:20
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-26 10:20
Reported
2024-03-26 10:23
Platform
win7-20240221-en
Max time kernel
143s
Max time network
131s
Command Line
Signatures
Tofsee
Windows security bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\ymqshkno = "0" | C:\Windows\SysWOW64\svchost.exe | N/A |
Creates new service(s)
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\ymqshkno\ImagePath = "C:\\Windows\\SysWOW64\\ymqshkno\\hbbsdmdf.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\ymqshkno\hbbsdmdf.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2428 set thread context of 2992 | N/A | C:\Windows\SysWOW64\ymqshkno\hbbsdmdf.exe | C:\Windows\SysWOW64\svchost.exe |
Launches sc.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe
"C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ymqshkno\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hbbsdmdf.exe" C:\Windows\SysWOW64\ymqshkno\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ymqshkno binPath= "C:\Windows\SysWOW64\ymqshkno\hbbsdmdf.exe /d\"C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ymqshkno "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ymqshkno
C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
C:\Windows\SysWOW64\ymqshkno\hbbsdmdf.exe
C:\Windows\SysWOW64\ymqshkno\hbbsdmdf.exe /d"C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 20.112.250.133:80 | microsoft.com | tcp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 8.8.8.8:53 | microsoft-com.mail.protection.outlook.com | udp |
| US | 52.101.11.0:25 | microsoft-com.mail.protection.outlook.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta7.am0.yahoodns.net | udp |
| US | 67.195.204.73:25 | mta7.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| BE | 142.251.173.27:25 | smtp.google.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | mail.ru | udp |
| US | 8.8.8.8:53 | mxs.mail.ru | udp |
| RU | 94.100.180.31:25 | mxs.mail.ru | tcp |
| HK | 43.231.4.7:443 | tcp |
Files
memory/1436-1-0x00000000005A0000-0x00000000006A0000-memory.dmp
memory/1436-4-0x0000000000400000-0x000000000046E000-memory.dmp
memory/1436-3-0x0000000000220000-0x0000000000233000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\hbbsdmdf.exe
| MD5 | 99942c7c9d05ab4ceb75ca3880952cc3 |
| SHA1 | 5bbe60343821535132ec1c0382f34299459c2ded |
| SHA256 | efc7a37e4f2a33a07b9f2bcc223ca6942c9e5ea6dac5fe0d724b0a474c853edc |
| SHA512 | e53013dd7d2abc899a71e8fc620b6675be2685873607182868c2806cc753eb355e850190ffe0c81e6293987a96d3eb68d0f5a26c7f7ef7f29f60957052e00a60 |
memory/1436-6-0x0000000000400000-0x000000000046E000-memory.dmp
C:\Windows\SysWOW64\ymqshkno\hbbsdmdf.exe
| MD5 | d3518cfce049a078c5d7d454f45f18ff |
| SHA1 | c9a2a92a0d093fbe96fa331ad6f0187de278fadc |
| SHA256 | a994d077bddd69c283ac3df4688089118696dc22f994dc368a59e610651695fa |
| SHA512 | 36cd6fe78146d0a11c0192413c0b358de2080ffd28aa602f339fb153bacc9cbbcf8428d0cd5ffac353a995715899b7c40dc5b0d9e17c91663a8206b2d2f6a86e |
memory/2428-9-0x00000000004E0000-0x00000000005E0000-memory.dmp
memory/2428-10-0x0000000000400000-0x000000000046E000-memory.dmp
memory/2992-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2992-11-0x0000000000100000-0x0000000000115000-memory.dmp
memory/2428-15-0x0000000000400000-0x000000000046E000-memory.dmp
memory/2992-14-0x0000000000100000-0x0000000000115000-memory.dmp
memory/2992-18-0x0000000000100000-0x0000000000115000-memory.dmp
memory/2992-19-0x0000000000100000-0x0000000000115000-memory.dmp
memory/2992-20-0x0000000000100000-0x0000000000115000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-26 10:20
Reported
2024-03-26 10:23
Platform
win10v2004-20240226-en
Max time kernel
150s
Max time network
151s
Command Line
Signatures
Tofsee
Creates new service(s)
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\lylhnhqf\ImagePath = "C:\\Windows\\SysWOW64\\lylhnhqf\\tvqwpcm.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\lylhnhqf\tvqwpcm.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\|xr | C:\Windows\SysWOW64\lylhnhqf\tvqwpcm.exe | N/A |
| File created | C:\Windows\SysWOW64\ΓΌ?q | C:\Windows\SysWOW64\lylhnhqf\tvqwpcm.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4708 set thread context of 524 | N/A | C:\Windows\SysWOW64\lylhnhqf\tvqwpcm.exe | C:\Windows\SysWOW64\svchost.exe |
Launches sc.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\sc.exe | N/A |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\lylhnhqf\tvqwpcm.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe
"C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lylhnhqf\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tvqwpcm.exe" C:\Windows\SysWOW64\lylhnhqf\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create lylhnhqf binPath= "C:\Windows\SysWOW64\lylhnhqf\tvqwpcm.exe /d\"C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description lylhnhqf "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start lylhnhqf
C:\Windows\SysWOW64\lylhnhqf\tvqwpcm.exe
C:\Windows\SysWOW64\lylhnhqf\tvqwpcm.exe /d"C:\Users\Admin\AppData\Local\Temp\deed33d8537ad5384cd927b88df28494.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 4260 -ip 4260
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4708 -ip 4708
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4708 -s 524
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4260 -s 1044
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 23.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 8.8.8.8:53 | 190.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 45.19.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 20.112.250.133:80 | microsoft.com | tcp |
| US | 8.8.8.8:53 | microsoft.com | udp |
| US | 8.8.8.8:53 | microsoft-com.mail.protection.outlook.com | udp |
| US | 52.101.42.0:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | 133.250.112.20.in-addr.arpa | udp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 100.5.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 119.110.54.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 44.56.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta7.am0.yahoodns.net | udp |
| US | 67.195.228.111:25 | mta7.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| BE | 142.251.173.27:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | 181.178.17.96.in-addr.arpa | udp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 172.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | mail.ru | udp |
| US | 8.8.8.8:53 | mxs.mail.ru | udp |
| RU | 217.69.139.150:25 | mxs.mail.ru | tcp |
| US | 8.8.8.8:53 | 186.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 211.143.182.52.in-addr.arpa | udp |
Files
memory/4260-1-0x00000000004D0000-0x00000000005D0000-memory.dmp
memory/4260-2-0x00000000004B0000-0x00000000004C3000-memory.dmp
memory/4260-3-0x0000000000400000-0x000000000046E000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tvqwpcm.exe
| MD5 | d1c78fcfbc3a5262649e77cff98be43d |
| SHA1 | 5ef136647957980055ae386066deeac7cafcfcd8 |
| SHA256 | 5f66c0b1051813c566fdf24230ea6a26c285897611f8e32d20c630e0f78f660e |
| SHA512 | 64850b4faea01258989ea6dc90b8450f81a9a1681623013e682e0a3d7348c939d12d497eece34b0d4275c3859ea49ba33bb7d3c90351da5b94bde45b810ace63 |
memory/4708-8-0x0000000000700000-0x0000000000800000-memory.dmp
memory/4708-10-0x00000000006C0000-0x00000000006D3000-memory.dmp
memory/524-9-0x0000000000BE0000-0x0000000000BF5000-memory.dmp
memory/4708-12-0x0000000000400000-0x000000000046E000-memory.dmp
memory/524-14-0x0000000000BE0000-0x0000000000BF5000-memory.dmp
memory/4260-16-0x0000000000400000-0x000000000046E000-memory.dmp
memory/524-17-0x0000000000BE0000-0x0000000000BF5000-memory.dmp
memory/524-18-0x0000000000BE0000-0x0000000000BF5000-memory.dmp
memory/524-19-0x0000000000BE0000-0x0000000000BF5000-memory.dmp