Analysis Overview
SHA256
64e52297cb5b2028e6d8f9827630a881bf7a3862645a0bef4642e890c291c6f9
Threat Level: Known bad
The file de66f26c8cf8906b96c4d20e5f443716 was found to be: Known bad.
Malicious Activity Summary
Tofsee
Creates new service(s)
Sets service image path in registry
Modifies Windows Firewall
Deletes itself
Executes dropped EXE
Checks computer location settings
Suspicious use of SetThreadContext
Launches sc.exe
Program crash
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-25 16:05
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-25 16:05
Reported
2024-03-25 16:08
Platform
win10v2004-20240226-en
Max time kernel
150s
Max time network
156s
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\fjuaxfnd\ImagePath = "C:\\Windows\\SysWOW64\\fjuaxfnd\\zrwwdvpt.exe" | C:\Windows\SysWOW64\svchost.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\de66f26c8cf8906b96c4d20e5f443716.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\fjuaxfnd\zrwwdvpt.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 552 set thread context of 4572 | N/A | C:\Windows\SysWOW64\fjuaxfnd\zrwwdvpt.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\de66f26c8cf8906b96c4d20e5f443716.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\fjuaxfnd\zrwwdvpt.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\de66f26c8cf8906b96c4d20e5f443716.exe
"C:\Users\Admin\AppData\Local\Temp\de66f26c8cf8906b96c4d20e5f443716.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fjuaxfnd\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zrwwdvpt.exe" C:\Windows\SysWOW64\fjuaxfnd\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create fjuaxfnd binPath= "C:\Windows\SysWOW64\fjuaxfnd\zrwwdvpt.exe /d\"C:\Users\Admin\AppData\Local\Temp\de66f26c8cf8906b96c4d20e5f443716.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description fjuaxfnd "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start fjuaxfnd
C:\Windows\SysWOW64\fjuaxfnd\zrwwdvpt.exe
C:\Windows\SysWOW64\fjuaxfnd\zrwwdvpt.exe /d"C:\Users\Admin\AppData\Local\Temp\de66f26c8cf8906b96c4d20e5f443716.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 444 -p 3664 -ip 3664
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3664 -s 1028
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 552 -ip 552
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 552 -s 520
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=4172 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 217.106.137.52.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 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.181.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.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 | 52.101.40.26:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.250.112.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| GB | 172.217.169.42:443 | chromewebstore.googleapis.com | tcp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 42.169.217.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta6.am0.yahoodns.net | udp |
| US | 98.136.96.74:25 | mta6.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| BE | 64.233.166.27:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | 188.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | refabyd.info | 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 | 43.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | refabyd.info | udp |
| US | 8.8.8.8:53 | refabyd.info | udp |
| US | 8.8.8.8:53 | refabyd.info | 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 |
| US | 8.8.8.8:53 | refabyd.info | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
| US | 8.8.8.8:53 | 88.16.208.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | defeatwax.ru | udp |
Files
memory/3664-1-0x0000000000620000-0x0000000000720000-memory.dmp
memory/3664-2-0x0000000000600000-0x0000000000613000-memory.dmp
memory/3664-3-0x0000000000400000-0x0000000000456000-memory.dmp
memory/3664-5-0x0000000000400000-0x0000000000456000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\zrwwdvpt.exe
| MD5 | f4fe795d214e87a4ef45c1101849ffc6 |
| SHA1 | db3b17947453bc4e0d8140d39a8927b4908511de |
| SHA256 | 03f072c233ee62f1ce907d0e79970eca502e7094dfdfc86d32238bc012635a1c |
| SHA512 | a1f7450e039f9bae60962897ade9fd98ffd033dc50d13bd28f48f804fa0ca560c1c67ae45f7805c50b446be9af18d3c250e8ba29fe6ef7c1bf657b0e354cfd92 |
C:\Windows\SysWOW64\fjuaxfnd\zrwwdvpt.exe
| MD5 | 4dab2695168085b462f35c6f3822ddf8 |
| SHA1 | 62400adb7708b992372fa49a9da5fa0c68aeb515 |
| SHA256 | f127b71525fe166654fa55461de935755e05467c8d9fb959d49a6ebee8aebdd0 |
| SHA512 | 454decfa5582d2b57ad6969e99d54ad7d4395cf3b7038074b378c4a3ebe67412762abe4b7720b4f7c98968bf23738e1dc6039e95af431d35eb13457d3d7c661e |
memory/3664-9-0x0000000000400000-0x0000000000456000-memory.dmp
memory/3664-10-0x0000000000600000-0x0000000000613000-memory.dmp
memory/552-11-0x00000000005A0000-0x00000000006A0000-memory.dmp
memory/4572-13-0x00000000004E0000-0x00000000004F5000-memory.dmp
memory/552-12-0x0000000000400000-0x0000000000456000-memory.dmp
memory/4572-17-0x00000000004E0000-0x00000000004F5000-memory.dmp
memory/552-18-0x0000000000400000-0x0000000000456000-memory.dmp
memory/4572-19-0x00000000004E0000-0x00000000004F5000-memory.dmp
memory/4572-20-0x00000000004E0000-0x00000000004F5000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-25 16:05
Reported
2024-03-25 16:08
Platform
win7-20240221-en
Max time kernel
122s
Max time network
126s
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 |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\hhirgbnz\rrkxjgfh.exe | N/A |
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\de66f26c8cf8906b96c4d20e5f443716.exe
"C:\Users\Admin\AppData\Local\Temp\de66f26c8cf8906b96c4d20e5f443716.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hhirgbnz\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rrkxjgfh.exe" C:\Windows\SysWOW64\hhirgbnz\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create hhirgbnz binPath= "C:\Windows\SysWOW64\hhirgbnz\rrkxjgfh.exe /d\"C:\Users\Admin\AppData\Local\Temp\de66f26c8cf8906b96c4d20e5f443716.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description hhirgbnz "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start hhirgbnz
C:\Windows\SysWOW64\hhirgbnz\rrkxjgfh.exe
C:\Windows\SysWOW64\hhirgbnz\rrkxjgfh.exe /d"C:\Users\Admin\AppData\Local\Temp\de66f26c8cf8906b96c4d20e5f443716.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
Network
Files
memory/2492-1-0x00000000002F0000-0x00000000003F0000-memory.dmp
memory/2492-2-0x00000000001B0000-0x00000000001C3000-memory.dmp
memory/2492-4-0x0000000000400000-0x0000000000456000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\rrkxjgfh.exe
| MD5 | 35710bd639f65252b89699a77044e45f |
| SHA1 | 3f895859dd06024faf6346ac832985fd7aeb8b67 |
| SHA256 | 8095f40523e34bbbf688244d18ddc0b2abe3a6d682b74cd503f346dfdaa70227 |
| SHA512 | 0bc705ec370acab9d304a235e4755b0b460f4fcbf0639d77d1ebf4d268cb42dae3a2e5bdf5c249e6a700a859d6b8e06d11b222c519686f2cefe61f7d508e0b3f |
memory/2492-9-0x00000000001B0000-0x00000000001C3000-memory.dmp
C:\Windows\SysWOW64\hhirgbnz\rrkxjgfh.exe
| MD5 | d49ac487776a712f9a57dc4b762bc44a |
| SHA1 | 6e14c8ecd14d8110a5037e527cde9aeb12a43f42 |
| SHA256 | d53ea293d4c1c2c7c2c454485be9610f2bb81eda17aa3ca0536e9f3ed36da62d |
| SHA512 | 500687d53c70c335c924257b4ce658e2c3a3b2d8324f2a87f45f72a9c31ca800131d2d91b6f94ede960b6c560f65cf4eeee2d218dca7d17d9e7d20bb91f9c193 |
memory/2492-8-0x0000000000400000-0x0000000000456000-memory.dmp