Analysis Overview
SHA256
901847a959678fa8c5a673996b31303d6de209e124ad922debe57f019c38fe25
Threat Level: Known bad
The file c4e30adbc0004c8b24f86e36cfff81f7 was found to be: Known bad.
Malicious Activity Summary
Windows security bypass
Tofsee
Modifies Windows Firewall
Sets service image path in registry
Creates new service(s)
Deletes itself
Checks computer location settings
Executes dropped EXE
Suspicious use of SetThreadContext
Launches sc.exe
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-13 03:44
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-13 03:44
Reported
2024-03-13 03:47
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\ezwsjjsy = "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\ezwsjjsy\ImagePath = "C:\\Windows\\SysWOW64\\ezwsjjsy\\nlsonwul.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\ezwsjjsy\nlsonwul.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2068 set thread context of 2584 | N/A | C:\Windows\SysWOW64\ezwsjjsy\nlsonwul.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\c4e30adbc0004c8b24f86e36cfff81f7.exe
"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ezwsjjsy\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nlsonwul.exe" C:\Windows\SysWOW64\ezwsjjsy\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ezwsjjsy binPath= "C:\Windows\SysWOW64\ezwsjjsy\nlsonwul.exe /d\"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ezwsjjsy "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ezwsjjsy
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\ezwsjjsy\nlsonwul.exe
C:\Windows\SysWOW64\ezwsjjsy\nlsonwul.exe /d"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.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 | 52.101.42.0:25 | 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 | 98.136.96.74:25 | mta7.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 209.85.202.26:25 | 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/1964-0-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/1964-2-0x0000000000D90000-0x0000000000E90000-memory.dmp
memory/1964-4-0x0000000000400000-0x0000000000C56000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\nlsonwul.exe
| MD5 | 79e4d24d8728cabc83e1765ff05f86de |
| SHA1 | dc375306e7e7f6ea65c07880786322e18a0443c6 |
| SHA256 | 05a7e9d48b9a89d570d9f0a000785be551f7eefd3f15babdc2a5387aad9486d2 |
| SHA512 | aaece4f61e38be2de2498e05bfc0dd85aebfb029530dda7dadef4c6a15a6957d5d7a135e3ca0b085bd0273380219f2454308bc5c408bd71eb3ea9ccdaa17d470 |
memory/1964-6-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/1964-7-0x0000000000D90000-0x0000000000E90000-memory.dmp
C:\Windows\SysWOW64\ezwsjjsy\nlsonwul.exe
| MD5 | 0546a906f72bf1b11637caa4da9f48d5 |
| SHA1 | a8b197068200ad072ca9e2ffe7cae035effeb4a9 |
| SHA256 | b21eb5ab574e6acc03ac86bafb5700324e8acf56e1b93e1241ca8d161af6671a |
| SHA512 | 75b374c76d6bdeccb7ca214f6382018352c5b79216d75ea695e01d79a70a50799ec60ba5b25558e5cd22e6439b8ae2f4948865fbe611dd195c904ebd296fd1d1 |
memory/2068-9-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/2068-11-0x0000000000DC0000-0x0000000000EC0000-memory.dmp
memory/2584-12-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2068-14-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/2584-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2584-16-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2584-19-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2068-20-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/2584-21-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2584-22-0x00000000000C0000-0x00000000000D5000-memory.dmp
memory/2584-23-0x00000000000C0000-0x00000000000D5000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-13 03:44
Reported
2024-03-13 03:47
Platform
win10v2004-20240226-en
Max time kernel
152s
Max time network
155s
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\oufiyglm\ImagePath = "C:\\Windows\\SysWOW64\\oufiyglm\\vvualzgj.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\c4e30adbc0004c8b24f86e36cfff81f7.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\oufiyglm\vvualzgj.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 656 set thread context of 3100 | N/A | C:\Windows\SysWOW64\oufiyglm\vvualzgj.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\c4e30adbc0004c8b24f86e36cfff81f7.exe
"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oufiyglm\
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vvualzgj.exe" C:\Windows\SysWOW64\oufiyglm\
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create oufiyglm binPath= "C:\Windows\SysWOW64\oufiyglm\vvualzgj.exe /d\"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe\"" type= own start= auto DisplayName= "wifi support"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description oufiyglm "wifi internet conection"
C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start oufiyglm
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\oufiyglm\vvualzgj.exe
C:\Windows\SysWOW64\oufiyglm\vvualzgj.exe /d"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe"
C:\Windows\SysWOW64\svchost.exe
svchost.exe
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=3940 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | 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 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| NL | 172.217.23.202:443 | chromewebstore.googleapis.com | tcp |
| US | 8.8.8.8:53 | 202.23.217.172.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 | 133.250.112.20.in-addr.arpa | udp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.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 | 67.195.204.77:25 | mta7.am0.yahoodns.net | tcp |
| US | 8.8.8.8:53 | 25.140.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | google.com | udp |
| US | 8.8.8.8:53 | smtp.google.com | udp |
| IE | 209.85.202.26:25 | smtp.google.com | tcp |
| HK | 43.231.4.7:443 | tcp | |
| US | 8.8.8.8:53 | 13.227.111.52.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 | 43.58.199.20.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 | 88.16.208.104.in-addr.arpa | udp |
Files
memory/4612-0-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/4612-2-0x0000000000DF0000-0x0000000000EF0000-memory.dmp
memory/4612-4-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/4612-5-0x0000000000400000-0x0000000000C56000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\vvualzgj.exe
| MD5 | 9ce7c16f8a117f83e95fa911a36bdc9d |
| SHA1 | 57ffddcaea9c8964903657b7a3b13bfc4c2fb315 |
| SHA256 | 0b3d1e861cd53804c95b1b9062b18fceba2cde8c159a3197958e6901826837f6 |
| SHA512 | 4c5786c56a6edcb54e2450d18a521408f7513b38028575e05d9a30bcc38009d65a0eab3c43f7414b021e40ef013c59ccdb921d8876172deac52cbca9e2c2abd7 |
memory/4612-7-0x0000000000400000-0x0000000000C56000-memory.dmp
C:\Windows\SysWOW64\oufiyglm\vvualzgj.exe
| MD5 | 9878ab660d43259b25df192d9a1a5ed4 |
| SHA1 | d5412da0f7608058918c322cc143bb771f25f16f |
| SHA256 | 2795f3ed9b3e88edb0b8afe5e4b763cd6105d9a8ca18ae14bfd58a5ed9e4fb5e |
| SHA512 | 348a99369467a0c864d73b2c22e84c09c89ad014448361c86f9fcbb909e10093c5b8c4032f24c176cbfc82e206eed379a3c08283784477633468dd36e9c2afc9 |
memory/656-9-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/656-11-0x0000000000E50000-0x0000000000F50000-memory.dmp
memory/656-12-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/3100-13-0x0000000000470000-0x0000000000485000-memory.dmp
memory/656-14-0x0000000000400000-0x0000000000C56000-memory.dmp
memory/3100-17-0x0000000000470000-0x0000000000485000-memory.dmp
memory/3100-18-0x0000000000470000-0x0000000000485000-memory.dmp
memory/3100-19-0x0000000000470000-0x0000000000485000-memory.dmp