b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344

Analysis

max time kernel
238s
max time network
336s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
24-11-2022 06:01

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General

Target

b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
Size

694KB
MD5

e3412e8b231384002f79953e87fcc7d6
SHA1

bfd490952c36222d027971ef8f1d5c0f7cb5cb60
SHA256

b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344
SHA512

5d066537c5ccf249b327beb76bdf8f841e5ec2fd49d6b2d5451b7d2df8e0c4ea2f7c4f015f6760efd2f0236de6ebb89672d830dacc5f99839549e0b49068d54f
SSDEEP

12288:0Abu3fQ+thk6Ez4bfFOOqAphWKCxFN/plQmHPPGZ2BWx3upMZdLOTgsy:0AbuPPEzMfwXpKCV/p6Zv3upMZdCgp

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\drivers\nethfdrv.sys	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe

Executes dropped EXE 3 IoCs

pid	Process
1668	installd.exe
1612	nethtsrv.exe
840	netupdsrv.exe

Loads dropped DLL 9 IoCs

pid	Process
564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
1668	installd.exe
564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
1612	nethtsrv.exe
1612	nethtsrv.exe
564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\hfnapi.dll	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
File created	C:\Windows\SysWOW64\hfpapi.dll	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
File created	C:\Windows\SysWOW64\installd.exe	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
File created	C:\Windows\SysWOW64\nethtsrv.exe	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\Config\data.xml	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Runs net.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
460	Process not Found

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 564 wrote to memory of 896	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	28
PID 564 wrote to memory of 896	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	28
PID 564 wrote to memory of 896	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	28
PID 564 wrote to memory of 896	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	28
PID 896 wrote to memory of 1504	896	net.exe	30
PID 896 wrote to memory of 1504	896	net.exe	30
PID 896 wrote to memory of 1504	896	net.exe	30
PID 896 wrote to memory of 1504	896	net.exe	30
PID 564 wrote to memory of 1456	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	31
PID 564 wrote to memory of 1456	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	31
PID 564 wrote to memory of 1456	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	31
PID 564 wrote to memory of 1456	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	31
PID 1456 wrote to memory of 1224	1456	net.exe	33
PID 1456 wrote to memory of 1224	1456	net.exe	33
PID 1456 wrote to memory of 1224	1456	net.exe	33
PID 1456 wrote to memory of 1224	1456	net.exe	33
PID 564 wrote to memory of 1668	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	34
PID 564 wrote to memory of 1668	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	34
PID 564 wrote to memory of 1668	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	34
PID 564 wrote to memory of 1668	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	34
PID 564 wrote to memory of 1668	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	34
PID 564 wrote to memory of 1668	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	34
PID 564 wrote to memory of 1668	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	34
PID 564 wrote to memory of 1612	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	36
PID 564 wrote to memory of 1612	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	36
PID 564 wrote to memory of 1612	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	36
PID 564 wrote to memory of 1612	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	36
PID 564 wrote to memory of 840	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	38
PID 564 wrote to memory of 840	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	38
PID 564 wrote to memory of 840	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	38
PID 564 wrote to memory of 840	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	38
PID 564 wrote to memory of 840	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	38
PID 564 wrote to memory of 840	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	38
PID 564 wrote to memory of 840	564	b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe	38

C:\Users\Admin\AppData\Local\Temp\b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.exe
"C:\Users\Admin\AppData\Local\Temp\b3176b58c3103c0cf53857e94945f74bfc4e988dfa7770837c2beb276be8a344.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:564
- C:\Windows\SysWOW64\net.exe
  net stop nethttpservice
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:896
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop nethttpservice
    3⤵
    PID:1504
- C:\Windows\SysWOW64\net.exe
  net stop serviceupdater
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1456
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop serviceupdater
    3⤵
    PID:1224
- C:\Windows\SysWOW64\installd.exe
  "C:\Windows\system32\installd.exe" nethfdrv
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:1668
- C:\Windows\SysWOW64\nethtsrv.exe
  "C:\Windows\system32\nethtsrv.exe" -nfdi
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:1612
- C:\Windows\SysWOW64\netupdsrv.exe
  "C:\Windows\system32\netupdsrv.exe" -nfdi
  2⤵
  - Executes dropped EXE
  PID:840

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
82e1b1a47d3c55325c61b83c87a5fd94

SHA1
60d0422fdbaf39c314174143e8fc0d358f03d030

SHA256
37f5555363ee918ffd00c9f14ee50e1c46c82a532b9c23ba3bfb995040e1a8a2

SHA512
2b365623603ab35e17314b55d80296626b10b07b39d019e66b05a530b69031d750300e94c9b88e61e20fd395d93c19a0bc1be0000b40d446d890bdeb91898a7d

Download Submit
C:\Windows\SysWOW64\hfpapi.dll

Filesize
241KB

MD5
5a7776f26bd73df188d747933746c2ee

SHA1
91325bfcc5a6ba2124cd55e6e1ef063de08eac2d

SHA256
8ca847f13b9fbcc279f465f7437928c923e51ec2b394eb70d7a4d1c8d029b235

SHA512
7e9ca95ec10d3c0a054f5bde1969f595d1a484fbf3c05ae9a395b273bd5f0de24faebe244f8c53c556cd657f4a928e06ba309ec83c0f0eebe3fa8458cf036778

Download Submit
C:\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
4d74a82bab553ded8d8962578749ed9f

SHA1
58cdf387ff920d5ab007312b3bcd0d67c88eff48

SHA256
b50505b38b1c7b52e2e4fc54cb6d57fa054a1dfe7311635b5163ecfa3a2b1ad6

SHA512
6e518e1e88024c94ea9461dcf68be749cf10d89adf72b84f9857e17a15cffe159cdda1fbf057f775a4efa19473123d7b08a1086957f15c2e6d0d3fbb030fe605

Download Submit
C:\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
7214cd6830b8a2adf7b67f6323fe57de

SHA1
cb2763f384858d47dc84ab9950f742d7067a0c1e

SHA256
702301a92dfbd78d8af66d4ed00bafbf0afcc547b259e9e5de5fbc4e9c01d738

SHA512
a57076b79ef78676f4566e4a0bad91f90495b35a151cdff74c31aed37df4cfcb9e9662b6d7ffcdc5cca8c22b4304d7e943780d0fbe46e2a845f608599b715d25

Download Submit
C:\Windows\SysWOW64\netupdsrv.exe

Filesize
158KB

MD5
e9dd8cd43f17cc2e2863498a7083bfb3

SHA1
bec69dab0f6c54e1d2af6e65e770e6d3c62887e3

SHA256
ef9bef64da6c7943b5056dfcf6f93bbfa1cdac8443e1b0529009fbb4e7a74d48

SHA512
9db432fed79a2caaf534bb5108a4db9a827be2885b5a90452a06632bbeff44bf275e57db10c8f98212f1872d345c7c345ea3d9017644bb44a7118af308646803

Download Submit
\Users\Admin\AppData\Local\Temp\nsf6E7.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
\Users\Admin\AppData\Local\Temp\nsf6E7.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Users\Admin\AppData\Local\Temp\nsf6E7.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
82e1b1a47d3c55325c61b83c87a5fd94

SHA1
60d0422fdbaf39c314174143e8fc0d358f03d030

SHA256
37f5555363ee918ffd00c9f14ee50e1c46c82a532b9c23ba3bfb995040e1a8a2

SHA512
2b365623603ab35e17314b55d80296626b10b07b39d019e66b05a530b69031d750300e94c9b88e61e20fd395d93c19a0bc1be0000b40d446d890bdeb91898a7d

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
82e1b1a47d3c55325c61b83c87a5fd94

SHA1
60d0422fdbaf39c314174143e8fc0d358f03d030

SHA256
37f5555363ee918ffd00c9f14ee50e1c46c82a532b9c23ba3bfb995040e1a8a2

SHA512
2b365623603ab35e17314b55d80296626b10b07b39d019e66b05a530b69031d750300e94c9b88e61e20fd395d93c19a0bc1be0000b40d446d890bdeb91898a7d

Download Submit
\Windows\SysWOW64\hfpapi.dll

Filesize
241KB

MD5
5a7776f26bd73df188d747933746c2ee

SHA1
91325bfcc5a6ba2124cd55e6e1ef063de08eac2d

SHA256
8ca847f13b9fbcc279f465f7437928c923e51ec2b394eb70d7a4d1c8d029b235

SHA512
7e9ca95ec10d3c0a054f5bde1969f595d1a484fbf3c05ae9a395b273bd5f0de24faebe244f8c53c556cd657f4a928e06ba309ec83c0f0eebe3fa8458cf036778

Download Submit
\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
4d74a82bab553ded8d8962578749ed9f

SHA1
58cdf387ff920d5ab007312b3bcd0d67c88eff48

SHA256
b50505b38b1c7b52e2e4fc54cb6d57fa054a1dfe7311635b5163ecfa3a2b1ad6

SHA512
6e518e1e88024c94ea9461dcf68be749cf10d89adf72b84f9857e17a15cffe159cdda1fbf057f775a4efa19473123d7b08a1086957f15c2e6d0d3fbb030fe605

Download Submit
\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
7214cd6830b8a2adf7b67f6323fe57de

SHA1
cb2763f384858d47dc84ab9950f742d7067a0c1e

SHA256
702301a92dfbd78d8af66d4ed00bafbf0afcc547b259e9e5de5fbc4e9c01d738

SHA512
a57076b79ef78676f4566e4a0bad91f90495b35a151cdff74c31aed37df4cfcb9e9662b6d7ffcdc5cca8c22b4304d7e943780d0fbe46e2a845f608599b715d25

Download Submit
\Windows\SysWOW64\netupdsrv.exe

Filesize
158KB

MD5
e9dd8cd43f17cc2e2863498a7083bfb3

SHA1
bec69dab0f6c54e1d2af6e65e770e6d3c62887e3

SHA256
ef9bef64da6c7943b5056dfcf6f93bbfa1cdac8443e1b0529009fbb4e7a74d48

SHA512
9db432fed79a2caaf534bb5108a4db9a827be2885b5a90452a06632bbeff44bf275e57db10c8f98212f1872d345c7c345ea3d9017644bb44a7118af308646803

Download Submit
memory/564-69-0x0000000000340000-0x00000000007BE000-memory.dmp

Filesize
4.5MB

Download
memory/564-54-0x0000000076D71000-0x0000000076D73000-memory.dmp

Filesize
8KB

Download
memory/564-55-0x0000000000340000-0x00000000007BE000-memory.dmp

Filesize
4.5MB

Download
memory/840-77-0x0000000000000000-mapping.dmp

Download
memory/896-58-0x0000000000000000-mapping.dmp

Download
memory/1224-62-0x0000000000000000-mapping.dmp

Download
memory/1456-61-0x0000000000000000-mapping.dmp

Download
memory/1504-59-0x0000000000000000-mapping.dmp

Download
memory/1612-71-0x0000000000000000-mapping.dmp

Download
memory/1668-64-0x0000000000000000-mapping.dmp

Download