Analysis
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max time kernel
164s -
max time network
168s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
22-11-2022 00:20
Static task
static1
Behavioral task
behavioral1
Sample
a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe
Resource
win10v2004-20221111-en
General
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Target
a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe
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Size
695KB
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MD5
150ae0a06e80349ea46d2061bdd81daf
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SHA1
fdc6b0f20ef3a94a43386884d45f40db7f1aecf7
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SHA256
a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946
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SHA512
4882afdfea2bab4c9b708bcb16f0beed6cf9a501dacd7be8a89071fcd40008aacd2bb72e74852222fcfe787fc67fcea85017e207e9f5cdce3b93f8a75525de43
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SSDEEP
12288:OAbu3fQ+thk6EzvbfGuL9ZCBkOx/8+GBHeR8zvhjqu3SZ5XgllVL3:OAbuPPEzzfj9OkKwHeizQuSAlVL3
Malware Config
Signatures
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Drops file in Drivers directory 1 IoCs
description ioc Process File created C:\Windows\system32\drivers\nethfdrv.sys a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe -
Executes dropped EXE 5 IoCs
pid Process 4164 installd.exe 3380 nethtsrv.exe 3484 netupdsrv.exe 3184 nethtsrv.exe 2232 netupdsrv.exe -
Loads dropped DLL 14 IoCs
pid Process 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 4164 installd.exe 3380 nethtsrv.exe 3380 nethtsrv.exe 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 3184 nethtsrv.exe 3184 nethtsrv.exe 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Drops file in System32 directory 5 IoCs
description ioc Process File created C:\Windows\SysWOW64\hfnapi.dll a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe File created C:\Windows\SysWOW64\hfpapi.dll a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe File created C:\Windows\SysWOW64\installd.exe a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe File created C:\Windows\SysWOW64\nethtsrv.exe a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe File created C:\Windows\SysWOW64\netupdsrv.exe a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe -
Drops file in Program Files directory 3 IoCs
description ioc Process File created C:\Program Files (x86)\Common Files\Config\data.xml a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe File created C:\Program Files (x86)\Common Files\Config\ver.xml a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe File created C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies data under HKEY_USERS 1 IoCs
description ioc Process Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections nethtsrv.exe -
Runs net.exe
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Suspicious behavior: LoadsDriver 1 IoCs
pid Process 648 Process not Found -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3184 nethtsrv.exe -
Suspicious use of WriteProcessMemory 33 IoCs
description pid Process procid_target PID 380 wrote to memory of 1264 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 83 PID 380 wrote to memory of 1264 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 83 PID 380 wrote to memory of 1264 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 83 PID 1264 wrote to memory of 1828 1264 net.exe 85 PID 1264 wrote to memory of 1828 1264 net.exe 85 PID 1264 wrote to memory of 1828 1264 net.exe 85 PID 380 wrote to memory of 400 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 86 PID 380 wrote to memory of 400 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 86 PID 380 wrote to memory of 400 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 86 PID 400 wrote to memory of 4352 400 net.exe 88 PID 400 wrote to memory of 4352 400 net.exe 88 PID 400 wrote to memory of 4352 400 net.exe 88 PID 380 wrote to memory of 4164 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 89 PID 380 wrote to memory of 4164 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 89 PID 380 wrote to memory of 4164 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 89 PID 380 wrote to memory of 3380 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 91 PID 380 wrote to memory of 3380 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 91 PID 380 wrote to memory of 3380 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 91 PID 380 wrote to memory of 3484 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 93 PID 380 wrote to memory of 3484 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 93 PID 380 wrote to memory of 3484 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 93 PID 380 wrote to memory of 1156 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 95 PID 380 wrote to memory of 1156 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 95 PID 380 wrote to memory of 1156 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 95 PID 1156 wrote to memory of 1644 1156 net.exe 97 PID 1156 wrote to memory of 1644 1156 net.exe 97 PID 1156 wrote to memory of 1644 1156 net.exe 97 PID 380 wrote to memory of 4796 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 99 PID 380 wrote to memory of 4796 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 99 PID 380 wrote to memory of 4796 380 a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe 99 PID 4796 wrote to memory of 2576 4796 net.exe 101 PID 4796 wrote to memory of 2576 4796 net.exe 101 PID 4796 wrote to memory of 2576 4796 net.exe 101
Processes
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C:\Users\Admin\AppData\Local\Temp\a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe"C:\Users\Admin\AppData\Local\Temp\a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe"1⤵
- Drops file in Drivers directory
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:380 -
C:\Windows\SysWOW64\net.exenet stop nethttpservice2⤵
- Suspicious use of WriteProcessMemory
PID:1264 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop nethttpservice3⤵PID:1828
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C:\Windows\SysWOW64\net.exenet stop serviceupdater2⤵
- Suspicious use of WriteProcessMemory
PID:400 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop serviceupdater3⤵PID:4352
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C:\Windows\SysWOW64\installd.exe"C:\Windows\system32\installd.exe" nethfdrv2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:4164
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C:\Windows\SysWOW64\nethtsrv.exe"C:\Windows\system32\nethtsrv.exe" -nfdi2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:3380
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C:\Windows\SysWOW64\netupdsrv.exe"C:\Windows\system32\netupdsrv.exe" -nfdi2⤵
- Executes dropped EXE
PID:3484
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C:\Windows\SysWOW64\net.exenet start nethttpservice2⤵
- Suspicious use of WriteProcessMemory
PID:1156 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 start nethttpservice3⤵PID:1644
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C:\Windows\SysWOW64\net.exenet start serviceupdater2⤵
- Suspicious use of WriteProcessMemory
PID:4796 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 start serviceupdater3⤵PID:2576
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C:\Windows\SysWOW64\nethtsrv.exeC:\Windows\SysWOW64\nethtsrv.exe1⤵
- Executes dropped EXE
- Loads dropped DLL
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:3184
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C:\Windows\SysWOW64\netupdsrv.exeC:\Windows\SysWOW64\netupdsrv.exe1⤵
- Executes dropped EXE
PID:2232
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
11KB
MD5c17103ae9072a06da581dec998343fc1
SHA1b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d
SHA256dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f
SHA512d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f
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Filesize
6KB
MD5acc2b699edfea5bf5aae45aba3a41e96
SHA1d2accf4d494e43ceb2cff69abe4dd17147d29cc2
SHA256168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e
SHA512e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe
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Filesize
6KB
MD5acc2b699edfea5bf5aae45aba3a41e96
SHA1d2accf4d494e43ceb2cff69abe4dd17147d29cc2
SHA256168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e
SHA512e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe
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Filesize
6KB
MD5acc2b699edfea5bf5aae45aba3a41e96
SHA1d2accf4d494e43ceb2cff69abe4dd17147d29cc2
SHA256168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e
SHA512e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe
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Filesize
6KB
MD5acc2b699edfea5bf5aae45aba3a41e96
SHA1d2accf4d494e43ceb2cff69abe4dd17147d29cc2
SHA256168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e
SHA512e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe
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Filesize
6KB
MD5acc2b699edfea5bf5aae45aba3a41e96
SHA1d2accf4d494e43ceb2cff69abe4dd17147d29cc2
SHA256168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e
SHA512e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe
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Filesize
6KB
MD5acc2b699edfea5bf5aae45aba3a41e96
SHA1d2accf4d494e43ceb2cff69abe4dd17147d29cc2
SHA256168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e
SHA512e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe
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Filesize
6KB
MD5acc2b699edfea5bf5aae45aba3a41e96
SHA1d2accf4d494e43ceb2cff69abe4dd17147d29cc2
SHA256168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e
SHA512e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe
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Filesize
6KB
MD5acc2b699edfea5bf5aae45aba3a41e96
SHA1d2accf4d494e43ceb2cff69abe4dd17147d29cc2
SHA256168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e
SHA512e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe
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Filesize
106KB
MD5bd0e50d970dd138bf888f4c09dc123ef
SHA11806b4e71ebcca3bc65c35ef7db952836aef2e56
SHA25685d5260b3d3674c7c8a4897c1bdb619ca70d472c4471d3f961625d66634f874c
SHA51233d065c2900253529e95ef51c86b5c6880b5459b920ad8a27b98fbae92ef8d2fea842b7667ce51a035c2742b7ccd48034e76960e0696c8d9d3ec0f6594bc3377
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Filesize
106KB
MD5bd0e50d970dd138bf888f4c09dc123ef
SHA11806b4e71ebcca3bc65c35ef7db952836aef2e56
SHA25685d5260b3d3674c7c8a4897c1bdb619ca70d472c4471d3f961625d66634f874c
SHA51233d065c2900253529e95ef51c86b5c6880b5459b920ad8a27b98fbae92ef8d2fea842b7667ce51a035c2742b7ccd48034e76960e0696c8d9d3ec0f6594bc3377
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Filesize
106KB
MD5bd0e50d970dd138bf888f4c09dc123ef
SHA11806b4e71ebcca3bc65c35ef7db952836aef2e56
SHA25685d5260b3d3674c7c8a4897c1bdb619ca70d472c4471d3f961625d66634f874c
SHA51233d065c2900253529e95ef51c86b5c6880b5459b920ad8a27b98fbae92ef8d2fea842b7667ce51a035c2742b7ccd48034e76960e0696c8d9d3ec0f6594bc3377
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Filesize
106KB
MD5bd0e50d970dd138bf888f4c09dc123ef
SHA11806b4e71ebcca3bc65c35ef7db952836aef2e56
SHA25685d5260b3d3674c7c8a4897c1bdb619ca70d472c4471d3f961625d66634f874c
SHA51233d065c2900253529e95ef51c86b5c6880b5459b920ad8a27b98fbae92ef8d2fea842b7667ce51a035c2742b7ccd48034e76960e0696c8d9d3ec0f6594bc3377
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Filesize
241KB
MD525de08e9a910fb59dfbb225d42458f18
SHA17706ece5a75d2026009b2ec693336457ce5ba6bd
SHA25632a8feec0c8996ce1f113b4c2c6ea6bb91aa282a60ad72320d7facfa843c1240
SHA51264457d13a12b2c3993a65bd5f6e283da9f9709eed08dca94fd979293f3201ea3f71800b189c52eabac4820378f1866d61759cd6d8f9bd5d011dce629e3a219f9
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Filesize
241KB
MD525de08e9a910fb59dfbb225d42458f18
SHA17706ece5a75d2026009b2ec693336457ce5ba6bd
SHA25632a8feec0c8996ce1f113b4c2c6ea6bb91aa282a60ad72320d7facfa843c1240
SHA51264457d13a12b2c3993a65bd5f6e283da9f9709eed08dca94fd979293f3201ea3f71800b189c52eabac4820378f1866d61759cd6d8f9bd5d011dce629e3a219f9
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Filesize
241KB
MD525de08e9a910fb59dfbb225d42458f18
SHA17706ece5a75d2026009b2ec693336457ce5ba6bd
SHA25632a8feec0c8996ce1f113b4c2c6ea6bb91aa282a60ad72320d7facfa843c1240
SHA51264457d13a12b2c3993a65bd5f6e283da9f9709eed08dca94fd979293f3201ea3f71800b189c52eabac4820378f1866d61759cd6d8f9bd5d011dce629e3a219f9
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Filesize
108KB
MD51f16914d356a4081f689f04fa6c046ad
SHA109729ccd3d81028d4cca8b9056d167f4d7c03d64
SHA256a6a7a20173b4519e203af0dbd2a59d666fc8ccf88bae51cc5a8d9330f3bc31d8
SHA5121ec74e16eda2bece11936d309d6be8ce17a297435deaecf841adaedbb258840eb4d075ea0c97d710c93c3954babe76da38dbfe1dfb4099d6472562d64ac7fd02
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Filesize
108KB
MD51f16914d356a4081f689f04fa6c046ad
SHA109729ccd3d81028d4cca8b9056d167f4d7c03d64
SHA256a6a7a20173b4519e203af0dbd2a59d666fc8ccf88bae51cc5a8d9330f3bc31d8
SHA5121ec74e16eda2bece11936d309d6be8ce17a297435deaecf841adaedbb258840eb4d075ea0c97d710c93c3954babe76da38dbfe1dfb4099d6472562d64ac7fd02
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Filesize
176KB
MD50bf35c4872e5591fd31da133ba3885c6
SHA15e8e37a76f9eedded93f7510614ffc4ab4ebf111
SHA256aec0fb75ae8a1033ff935b9e5e82962594a77814a6f7c186a3b298febea76fd0
SHA5122ee395ca31dfac4377c8860be3becad26392e60fdd9e9b5bbe2b12cfeec4409593f6fb9b71cff1822cc32b967f26471623041b7c9c8f7fab75b6225d61b2ddb3
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Filesize
176KB
MD50bf35c4872e5591fd31da133ba3885c6
SHA15e8e37a76f9eedded93f7510614ffc4ab4ebf111
SHA256aec0fb75ae8a1033ff935b9e5e82962594a77814a6f7c186a3b298febea76fd0
SHA5122ee395ca31dfac4377c8860be3becad26392e60fdd9e9b5bbe2b12cfeec4409593f6fb9b71cff1822cc32b967f26471623041b7c9c8f7fab75b6225d61b2ddb3
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Filesize
176KB
MD50bf35c4872e5591fd31da133ba3885c6
SHA15e8e37a76f9eedded93f7510614ffc4ab4ebf111
SHA256aec0fb75ae8a1033ff935b9e5e82962594a77814a6f7c186a3b298febea76fd0
SHA5122ee395ca31dfac4377c8860be3becad26392e60fdd9e9b5bbe2b12cfeec4409593f6fb9b71cff1822cc32b967f26471623041b7c9c8f7fab75b6225d61b2ddb3
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Filesize
159KB
MD52ddf62814724098ba56896e8f609eec4
SHA1c4ed0161365491863735f37fda7ff0b9fb10e128
SHA256247c423542adecc4a063c4fc1a287f50533323542aed89f910a4f7369d5eae93
SHA51247a3f34baba755ad9e4884ae3bd7a48fa1a5df59c88d191ec093edb52557df8ede70e106cb0e3201c111cfa94abf158768cc3368c2e7c1355e08b4127a277d6f
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Filesize
159KB
MD52ddf62814724098ba56896e8f609eec4
SHA1c4ed0161365491863735f37fda7ff0b9fb10e128
SHA256247c423542adecc4a063c4fc1a287f50533323542aed89f910a4f7369d5eae93
SHA51247a3f34baba755ad9e4884ae3bd7a48fa1a5df59c88d191ec093edb52557df8ede70e106cb0e3201c111cfa94abf158768cc3368c2e7c1355e08b4127a277d6f
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Filesize
159KB
MD52ddf62814724098ba56896e8f609eec4
SHA1c4ed0161365491863735f37fda7ff0b9fb10e128
SHA256247c423542adecc4a063c4fc1a287f50533323542aed89f910a4f7369d5eae93
SHA51247a3f34baba755ad9e4884ae3bd7a48fa1a5df59c88d191ec093edb52557df8ede70e106cb0e3201c111cfa94abf158768cc3368c2e7c1355e08b4127a277d6f