Analysis Overview
SHA256
b186eda75a3fd90163c798cb6b11f457f04175e71e09f86c0ec7037c56db55d9
Threat Level: Known bad
The file c5827bccfff621de9248e02b015d9522 was found to be: Known bad.
Malicious Activity Summary
Windows security bypass
Tofsee
Sets service image path in registry
Creates new service(s)
Modifies Windows Firewall
Deletes itself
Executes dropped EXE
Checks computer location settings
Suspicious use of SetThreadContext
Launches sc.exe
Program crash
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-13 09:22
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-13 09:22
Reported
2024-03-13 09:25
Platform
win7-20240221-en
Max time kernel
150s
Max time network
125s
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\qlfyqalg = "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\qlfyqalg\ImagePath = "C:\\Windows\\SysWOW64\\qlfyqalg\\lhzzwlky.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\qlfyqalg\lhzzwlky.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1632 set thread context of 2968 | N/A | C:\Windows\SysWOW64\qlfyqalg\lhzzwlky.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\c5827bccfff621de9248e02b015d9522.exe
"C:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qlfyqalg\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lhzzwlky.exe" C:\Windows\SysWOW64\qlfyqalg\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create qlfyqalg binPath= "C:\Windows\SysWOW64\qlfyqalg\lhzzwlky.exe /d\"C:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description qlfyqalg "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start qlfyqalg
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\qlfyqalg\lhzzwlky.exe
C:\Windows\SysWOW64\qlfyqalg\lhzzwlky.exe /d"C:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.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 | 104.47.53.36:25 | 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 | mta5.am0.yahoodns.net | udp |
| US | 67.195.228.94:25 | mta5.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 209.85.203.27:25 | 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 | 217.69.139.150:25 | mxs.mail.ru | tcp |
| HK | 43.231.4.7:443 | tcp |
Files
memory/1576-1-0x0000000000270000-0x0000000000370000-memory.dmp
memory/1576-2-0x0000000000020000-0x0000000000033000-memory.dmp
memory/1576-3-0x0000000000400000-0x0000000000472000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\lhzzwlky.exe
| MD5 | 72a63c1cbe195c713d3957d356c03edb |
| SHA1 | a95c07cf8b0c0cf649066d320cbda96aa94bf46c |
| SHA256 | 3a8f1a5ad787ef06cd5845ef75e9eaa5a03cfd5be41ba05b7326676d3537d507 |
| SHA512 | 3379466c64e7a1a18c2e7568e744fb453cf27821bf4dbc138b675a4071f3555da11fea9ce41ed20f9caa9577bb4bf67c7fc22c277f7b59adefbcbaba35fa7ab0 |
memory/1576-6-0x0000000000400000-0x0000000000472000-memory.dmp
memory/1576-7-0x0000000000020000-0x0000000000033000-memory.dmp
C:\Windows\SysWOW64\qlfyqalg\lhzzwlky.exe
| MD5 | 968fd1c23c8c4e0c4a65a056d1b2af61 |
| SHA1 | e3703adfc04a7321095d0b101d7068f2eab15bbf |
| SHA256 | 706b95ef453c73664d01762bd2768c4703069f245c1815635736f476eb3b840f |
| SHA512 | 9e3e2f3ebb8fdbbfe191fa9f858e9028ae2de88b92759d4b25912d4c48799d8081f3dacc740c326936cd80a66ff37c1f238ab476175fc9031a2551411fd34415 |
memory/2968-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1632-13-0x0000000000400000-0x0000000000472000-memory.dmp
memory/2968-11-0x0000000000080000-0x0000000000095000-memory.dmp
memory/1632-10-0x0000000000540000-0x0000000000640000-memory.dmp
memory/2968-15-0x0000000000080000-0x0000000000095000-memory.dmp
memory/1632-17-0x0000000000400000-0x0000000000472000-memory.dmp
memory/2968-19-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2968-20-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2968-21-0x0000000000080000-0x0000000000095000-memory.dmp
memory/2968-22-0x0000000000080000-0x0000000000095000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-13 09:22
Reported
2024-03-13 09:25
Platform
win10v2004-20240226-en
Max time kernel
151s
Max time network
146s
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\uywktbzo\ImagePath = "C:\\Windows\\SysWOW64\\uywktbzo\\joytnzwy.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.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\uywktbzo\joytnzwy.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4756 set thread context of 4996 | N/A | C:\Windows\SysWOW64\uywktbzo\joytnzwy.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:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\uywktbzo\joytnzwy.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.exe
"C:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uywktbzo\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\joytnzwy.exe" C:\Windows\SysWOW64\uywktbzo\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create uywktbzo binPath= "C:\Windows\SysWOW64\uywktbzo\joytnzwy.exe /d\"C:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description uywktbzo "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start uywktbzo
C:\Windows\SysWOW64\uywktbzo\joytnzwy.exe
C:\Windows\SysWOW64\uywktbzo\joytnzwy.exe /d"C:\Users\Admin\AppData\Local\Temp\c5827bccfff621de9248e02b015d9522.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 1424 -ip 1424
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1424 -s 1204
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4756 -ip 4756
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4756 -s 516
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3884 --field-trial-handle=2304,i,7548677271533893574,11048237606705436109,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 176.178.17.96.in-addr.arpa | udp |
| 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 | 58.99.105.20.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 | 8.8.8.8:53 | 133.250.112.20.in-addr.arpa | udp |
| US | 104.47.53.36:25 | microsoft-com.mail.protection.outlook.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 13.86.106.20.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 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 13.107.246.64:443 | tcp | |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 209.85.203.26:25 | smtp.google.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| 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 |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| HK | 43.231.4.7:443 | 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 |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
Files
memory/1424-1-0x00000000004B0000-0x00000000005B0000-memory.dmp
memory/1424-2-0x00000000001E0000-0x00000000001F3000-memory.dmp
memory/1424-3-0x0000000000400000-0x0000000000472000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\joytnzwy.exe
| MD5 | 507f4098845d5a11326bdab7e7d5da71 |
| SHA1 | a3d85876ad4e48e3212e12d0f1c6299c1eb8addf |
| SHA256 | 3e6b879eceeddc4e2f646fd825541f9057ba90b564f30578ac0045c7ed7d9410 |
| SHA512 | f02459a58a83a92396c8af4da9d7abede712bd3bcd14fe3ff03d572e345bcbf3cd97e2630d1f182b9f16b56433e49c4df39e7b7e4e0971cc522553d0162f287c |
C:\Windows\SysWOW64\uywktbzo\joytnzwy.exe
| MD5 | 93faf2fa03f8cb55c3b2f1fb4d11738d |
| SHA1 | 801cdfaa9ae4c4eb412e1cf31f2cc3ae6b302e44 |
| SHA256 | 05f3e5c9248e9cf66516b0d06edbb65d5dee28dffbf5ced96a8ed846d611c9d9 |
| SHA512 | 45e2d7203bb989910f84b3284145b0c39de269cbde726bfe4ebd43e4a672639a622f4601dc3ba28f1e18cce3840f9802fe2c24a7478f9465e827b8895305b37a |
memory/1424-7-0x0000000000400000-0x0000000000472000-memory.dmp
memory/1424-8-0x00000000001E0000-0x00000000001F3000-memory.dmp
memory/4756-11-0x0000000000400000-0x0000000000472000-memory.dmp
memory/4756-10-0x0000000000640000-0x0000000000740000-memory.dmp
memory/4996-12-0x0000000001250000-0x0000000001265000-memory.dmp
memory/4996-15-0x0000000001250000-0x0000000001265000-memory.dmp
memory/4996-16-0x0000000001250000-0x0000000001265000-memory.dmp
memory/4756-17-0x0000000000400000-0x0000000000472000-memory.dmp
memory/4996-18-0x0000000001250000-0x0000000001265000-memory.dmp