Analysis Overview
SHA256
3a0812a11a42c0ad5c6a6fa2b2ae73125561d2de24c2177e3794107de6d34f67
Threat Level: Known bad
The file c5326b8ccd0481b6fc7ea4d0261b15d5 was found to be: Known bad.
Malicious Activity Summary
Tofsee
Windows security bypass
Sets service image path in registry
Creates new service(s)
Modifies Windows Firewall
Executes dropped EXE
Checks computer location settings
Deletes itself
Suspicious use of SetThreadContext
Launches sc.exe
Enumerates physical storage devices
Program crash
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-13 06:26
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-13 06:26
Reported
2024-03-13 06:29
Platform
win7-20240221-en
Max time kernel
141s
Max time network
123s
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\rtsnwfhh = "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\rtsnwfhh\ImagePath = "C:\\Windows\\SysWOW64\\rtsnwfhh\\fczxjujx.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\rtsnwfhh\fczxjujx.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1604 set thread context of 2460 | N/A | C:\Windows\SysWOW64\rtsnwfhh\fczxjujx.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\c5326b8ccd0481b6fc7ea4d0261b15d5.exe
"C:\Users\Admin\AppData\Local\Temp\c5326b8ccd0481b6fc7ea4d0261b15d5.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rtsnwfhh\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fczxjujx.exe" C:\Windows\SysWOW64\rtsnwfhh\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create rtsnwfhh binPath= "C:\Windows\SysWOW64\rtsnwfhh\fczxjujx.exe /d\"C:\Users\Admin\AppData\Local\Temp\c5326b8ccd0481b6fc7ea4d0261b15d5.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description rtsnwfhh "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start rtsnwfhh
C:\Windows\SysWOW64\rtsnwfhh\fczxjujx.exe
C:\Windows\SysWOW64\rtsnwfhh\fczxjujx.exe /d"C:\Users\Admin\AppData\Local\Temp\c5326b8ccd0481b6fc7ea4d0261b15d5.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\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 | 104.47.54.36:25 | microsoft-com.mail.protection.outlook.com | tcp |
| HK | 43.231.4.6:443 | tcp | |
| US | 8.8.8.8:53 | yahoo.com | udp |
| US | 8.8.8.8:53 | mta6.am0.yahoodns.net | udp |
| US | 67.195.228.111:25 | mta6.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 74.125.193.27:25 | smtp.google.com | tcp |
| HK | 43.231.4.6:443 | 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 | 43.231.4.6:443 | tcp |
Files
memory/1948-1-0x0000000000A50000-0x0000000000B50000-memory.dmp
memory/1948-2-0x0000000000220000-0x0000000000233000-memory.dmp
memory/1948-4-0x0000000000400000-0x00000000008E9000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\fczxjujx.exe
| MD5 | b89e9f1dfa7ce11aeff8d1f2faa41f9a |
| SHA1 | f9498ea707d7189b08bf685ede05a101bcf7413d |
| SHA256 | 64671356c869cff08a7be79d7b3e10a9729b2646e344c30d3e529ef5f670dcdb |
| SHA512 | 68d0c74cba0ba5901b938aa5e57e7713b7679585fcc41359f7e4424714dc5ca8cf6b47eff22bb799e583b012e8586d62ca8da004bd3e28ccdee47521e27e5f86 |
C:\Windows\SysWOW64\rtsnwfhh\fczxjujx.exe
| MD5 | e2d9c34f2a8c08b6ff142edc6a13e245 |
| SHA1 | eb6ea090516e019fc8b279b61bbe55b5fbd72970 |
| SHA256 | 25dd10f4e6f793072e7c3032503728a1c467adcc0975bb9f03bcfd39d3fdbcdf |
| SHA512 | 1757ce9d5cdbfcb1d5aa9eac9428a80536c9e58b7be46462e514d7a5421e13104b7e8aa282e7e3f73032ffc8dab51b160d05a10a1fe6024585094d618f7f3a67 |
memory/1948-7-0x0000000000400000-0x00000000008E9000-memory.dmp
memory/1948-8-0x0000000000A50000-0x0000000000B50000-memory.dmp
memory/1948-9-0x0000000000220000-0x0000000000233000-memory.dmp
memory/1604-11-0x0000000000A20000-0x0000000000B20000-memory.dmp
memory/1604-12-0x0000000000400000-0x00000000008E9000-memory.dmp
memory/2460-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2460-13-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/1604-17-0x0000000000400000-0x00000000008E9000-memory.dmp
memory/2460-16-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2460-20-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2460-21-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2460-22-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2460-23-0x00000000000C0000-0x00000000000D5000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-13 06:26
Reported
2024-03-13 06:29
Platform
win10v2004-20240226-en
Max time kernel
152s
Max time network
152s
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\negjluyh\ImagePath = "C:\\Windows\\SysWOW64\\negjluyh\\qublzmuk.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\c5326b8ccd0481b6fc7ea4d0261b15d5.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\negjluyh\qublzmuk.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4124 set thread context of 2724 | N/A | C:\Windows\SysWOW64\negjluyh\qublzmuk.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\c5326b8ccd0481b6fc7ea4d0261b15d5.exe |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\negjluyh\qublzmuk.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c5326b8ccd0481b6fc7ea4d0261b15d5.exe
"C:\Users\Admin\AppData\Local\Temp\c5326b8ccd0481b6fc7ea4d0261b15d5.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\negjluyh\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qublzmuk.exe" C:\Windows\SysWOW64\negjluyh\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create negjluyh binPath= "C:\Windows\SysWOW64\negjluyh\qublzmuk.exe /d\"C:\Users\Admin\AppData\Local\Temp\c5326b8ccd0481b6fc7ea4d0261b15d5.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description negjluyh "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start negjluyh
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 420 -p 4984 -ip 4984
C:\Windows\SysWOW64\negjluyh\qublzmuk.exe
C:\Windows\SysWOW64\negjluyh\qublzmuk.exe /d"C:\Users\Admin\AppData\Local\Temp\c5326b8ccd0481b6fc7ea4d0261b15d5.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4984 -s 1164
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4124 -ip 4124
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4124 -s 508
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=4340 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 136.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.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 | 194.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.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 | 104.47.54.36:25 | microsoft-com.mail.protection.outlook.com | tcp |
| US | 8.8.8.8:53 | 133.250.112.20.in-addr.arpa | udp |
| HK | 43.231.4.6:443 | tcp | |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| 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 | 74.125.193.27:25 | smtp.google.com | tcp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| HK | 43.231.4.6:443 | 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 |
| 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 |
| HK | 43.231.4.6:443 | tcp | |
| US | 8.8.8.8:53 | 26.73.42.20.in-addr.arpa | udp |
Files
memory/4984-1-0x0000000000AA0000-0x0000000000BA0000-memory.dmp
memory/4984-2-0x0000000002640000-0x0000000002653000-memory.dmp
memory/4984-3-0x0000000000400000-0x00000000008E9000-memory.dmp
memory/4984-5-0x0000000000400000-0x00000000008E9000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\qublzmuk.exe
| MD5 | 3bb6e8afcaa67f72acf23cd413bbdf95 |
| SHA1 | b91c5b27090753d6e044e197ea4fdf13fe5da873 |
| SHA256 | 626fbb5667c3c8de0764fce5f89627178e1b734a6449d82cd745d6ac01c502ab |
| SHA512 | 4bd5e525a8a5376694b321af63e5cf7c31fb6d9404578d42aad4aa24fdcb2daba1c2b7b8a2930719ea61680c5da16b809f242c44fd3fe6d5541cc80989f11f6b |
C:\Windows\SysWOW64\negjluyh\qublzmuk.exe
| MD5 | 6fe069811fc6c0cb31bddfc5254054eb |
| SHA1 | 314bc9a7f39c6f16c5261f6fba99fec506a210c8 |
| SHA256 | 669329531e5724dc5cf4ceb3c5363265daa5a336ee8fe10d50e60374c016a539 |
| SHA512 | 296554610e5ef252d08dc7145cbdca036e7c8c78406ebf0ae53b8a429efddb4d941b69e53bc907e1d41f7c4f30ac0c6f5d7370ac983b4d66e068b20ce32e1226 |
memory/4984-8-0x0000000000400000-0x00000000008E9000-memory.dmp
memory/4984-11-0x0000000002640000-0x0000000002653000-memory.dmp
memory/4124-12-0x0000000000B30000-0x0000000000C30000-memory.dmp
memory/4124-13-0x0000000000400000-0x00000000008E9000-memory.dmp
memory/2724-14-0x0000000000480000-0x0000000000495000-memory.dmp
memory/2724-17-0x0000000000480000-0x0000000000495000-memory.dmp
memory/2724-18-0x0000000000480000-0x0000000000495000-memory.dmp
memory/2724-19-0x0000000000480000-0x0000000000495000-memory.dmp
memory/4124-20-0x0000000000400000-0x00000000008E9000-memory.dmp
memory/2724-21-0x0000000000480000-0x0000000000495000-memory.dmp