c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377

Analysis

max time kernel
241s
max time network
336s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 10:13

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General

Target

c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
Size

603KB
MD5

5cad6d376768c13f6319d58183bc4d26
SHA1

1524fd7376f92eb3543d99625510e0ad46ce9e7f
SHA256

c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377
SHA512

8597ec7282e129d29d2ace10f12ec2317bd3c5e2b5264ec3e02b66f908b60b095f9e5ed4f07527014c21ddd6c1e13a2635b558a0b2021890a9d3f7cc19cf3bfb
SSDEEP

12288:HIny5DYTmIag8wSaJgb/decI4XPflAKQq2SxW6K9E:PUTmR7aB4qKQXS0y

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

Processes:

c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe

description ioc process

File created C:\Windows\system32\drivers\nethfdrv.sys c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
Executes dropped EXE 3 IoCs

Processes:

installd.exenethtsrv.exenetupdsrv.exe

pid process

1512 installd.exe
808 nethtsrv.exe
1712 netupdsrv.exe

description	ioc	process
File created	C:\Windows\system32\drivers\nethfdrv.sys	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe

pid	process
1512	installd.exe
808	nethtsrv.exe
1712	netupdsrv.exe

Loads dropped DLL 9 IoCs

Processes:

c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exeinstalld.exenethtsrv.exe

pid	process
2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
1512	installd.exe
2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
808	nethtsrv.exe
808	nethtsrv.exe
2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.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

Processes:

c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe

description	ioc	process
File created	C:\Windows\SysWOW64\nethtsrv.exe	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
File created	C:\Windows\SysWOW64\hfnapi.dll	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
File created	C:\Windows\SysWOW64\hfpapi.dll	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
File created	C:\Windows\SysWOW64\installd.exe	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe

Drops file in Program Files directory 3 IoCs

Processes:

c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe

description	ioc	process
File created	C:\Program Files (x86)\Common Files\Config\data.xml	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.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

Processes:

pid process

460

pid	process
460

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exenet.exenet.exe

description	pid	process	target process
PID 2012 wrote to memory of 1584	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	net.exe
PID 2012 wrote to memory of 1584	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	net.exe
PID 2012 wrote to memory of 1584	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	net.exe
PID 2012 wrote to memory of 1584	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	net.exe
PID 1584 wrote to memory of 1576	1584	net.exe	net1.exe
PID 1584 wrote to memory of 1576	1584	net.exe	net1.exe
PID 1584 wrote to memory of 1576	1584	net.exe	net1.exe
PID 1584 wrote to memory of 1576	1584	net.exe	net1.exe
PID 2012 wrote to memory of 1532	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	net.exe
PID 2012 wrote to memory of 1532	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	net.exe
PID 2012 wrote to memory of 1532	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	net.exe
PID 2012 wrote to memory of 1532	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	net.exe
PID 1532 wrote to memory of 916	1532	net.exe	net1.exe
PID 1532 wrote to memory of 916	1532	net.exe	net1.exe
PID 1532 wrote to memory of 916	1532	net.exe	net1.exe
PID 1532 wrote to memory of 916	1532	net.exe	net1.exe
PID 2012 wrote to memory of 1512	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	installd.exe
PID 2012 wrote to memory of 1512	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	installd.exe
PID 2012 wrote to memory of 1512	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	installd.exe
PID 2012 wrote to memory of 1512	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	installd.exe
PID 2012 wrote to memory of 1512	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	installd.exe
PID 2012 wrote to memory of 1512	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	installd.exe
PID 2012 wrote to memory of 1512	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	installd.exe
PID 2012 wrote to memory of 808	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	nethtsrv.exe
PID 2012 wrote to memory of 808	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	nethtsrv.exe
PID 2012 wrote to memory of 808	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	nethtsrv.exe
PID 2012 wrote to memory of 808	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	nethtsrv.exe
PID 2012 wrote to memory of 1712	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	netupdsrv.exe
PID 2012 wrote to memory of 1712	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	netupdsrv.exe
PID 2012 wrote to memory of 1712	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	netupdsrv.exe
PID 2012 wrote to memory of 1712	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	netupdsrv.exe
PID 2012 wrote to memory of 1712	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	netupdsrv.exe
PID 2012 wrote to memory of 1712	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	netupdsrv.exe
PID 2012 wrote to memory of 1712	2012	c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe	netupdsrv.exe

C:\Users\Admin\AppData\Local\Temp\c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.exe
"C:\Users\Admin\AppData\Local\Temp\c2b50036898d28dfc8c35756e91601cec290347deb558c6a8a561bc04570d377.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:2012

C:\Windows\SysWOW64\net.exe
net stop nethttpservice
2⤵
- Suspicious use of WriteProcessMemory
PID:1584

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop nethttpservice
3⤵
PID:1576

C:\Windows\SysWOW64\net.exe
net stop serviceupdater
2⤵
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop serviceupdater
3⤵
PID:916

C:\Windows\SysWOW64\installd.exe
"C:\Windows\system32\installd.exe" nethfdrv
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1512

C:\Windows\SysWOW64\nethtsrv.exe
"C:\Windows\system32\nethtsrv.exe" -nfdi
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:808

C:\Windows\SysWOW64\netupdsrv.exe
"C:\Windows\system32\netupdsrv.exe" -nfdi
2⤵
- Executes dropped EXE
PID:1712

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
a37ec4df64f9c0958092127204776214

SHA1
fd9b74861c670fdd7e459a806148b15377e403a8

SHA256
702489cca898fc1dca843ddee0826639159165e4a65a1e833ab28e41038d8650

SHA512
8cb626ae8941f915451a120fdf971e0daa4c5a0ad95903dcf451a9b4108f8593a55cf41c4810c46e8b7b14404d05b6fc52b066969986f0af9395db54eae0b834

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

Filesize
244KB

MD5
2cbaf3794ae2ae8e3a2aafdff9fdfa4e

SHA1
00a7e4029d29243a7f4f282d9a1ad366f213a23b

SHA256
ac43da456672840c2ad5b6d1c98723413dfd9be231a2c4afc4e6c70a4269b0ee

SHA512
7382ee3e318287d568ca1fce66afba8ff6e7ebe3f4d779212b8f2f6085133c905da1b2454e5e080af995500351415b12bb7d6bbf07af0ddf30a822175a354a1e

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

Filesize
108KB

MD5
10b2ffcc43ebfccc3982ba69a474167e

SHA1
007015974280d76feb3cef81f96da22e29ee8a46

SHA256
4bc5bd684271afbd2091b51fad30bbe4241e90f6c9555c8a62ebfbdd7c30076c

SHA512
dc7bfcba82be51b29696294a192754dc79ee6ecb6a636be2f519d511eeacf81e0700c4ea90a161ea89be7b2ffc34f9982e6329ac501d11eae153016cf4de1b64

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

Filesize
176KB

MD5
9b37410e07cd10d92cc4da8b496a1932

SHA1
ede8d83d503f5a7de80fdc6c01ba09dee1cbf2fa

SHA256
13ca93f679ba8fa359f883e37777d60583df8c2ff06e33ac65587579d73daa34

SHA512
bfa0f2b3ac9bc93c5cdde58e085990ce54d3c0f03b5eceffc7190be3099634558272a01ee9afc06e0304233492f9b6b0851001bcf07b8be1e1ce681479681db8

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

Filesize
158KB

MD5
693f6b9d48a52d80d4b5b13c0968eed1

SHA1
9912458737cc6af38967df48ad20c58e1b2334f5

SHA256
85f487f91e89677663a5411b02180d7026f5ba3a96ec4742456c4d28dfc7a907

SHA512
0321437beea6f10a7fde5d9051d7c36b20f7b3b7bd9fa15858071c25b20c3de8519f4a04110fcfb7546923b7e977fdcad4cde3fef949854242b5d9f026588e34

Download Submit
\Users\Admin\AppData\Local\Temp\nsp23.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
\Users\Admin\AppData\Local\Temp\nsp23.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Users\Admin\AppData\Local\Temp\nsp23.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
a37ec4df64f9c0958092127204776214

SHA1
fd9b74861c670fdd7e459a806148b15377e403a8

SHA256
702489cca898fc1dca843ddee0826639159165e4a65a1e833ab28e41038d8650

SHA512
8cb626ae8941f915451a120fdf971e0daa4c5a0ad95903dcf451a9b4108f8593a55cf41c4810c46e8b7b14404d05b6fc52b066969986f0af9395db54eae0b834

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
a37ec4df64f9c0958092127204776214

SHA1
fd9b74861c670fdd7e459a806148b15377e403a8

SHA256
702489cca898fc1dca843ddee0826639159165e4a65a1e833ab28e41038d8650

SHA512
8cb626ae8941f915451a120fdf971e0daa4c5a0ad95903dcf451a9b4108f8593a55cf41c4810c46e8b7b14404d05b6fc52b066969986f0af9395db54eae0b834

Download Submit
\Windows\SysWOW64\hfpapi.dll

Filesize
244KB

MD5
2cbaf3794ae2ae8e3a2aafdff9fdfa4e

SHA1
00a7e4029d29243a7f4f282d9a1ad366f213a23b

SHA256
ac43da456672840c2ad5b6d1c98723413dfd9be231a2c4afc4e6c70a4269b0ee

SHA512
7382ee3e318287d568ca1fce66afba8ff6e7ebe3f4d779212b8f2f6085133c905da1b2454e5e080af995500351415b12bb7d6bbf07af0ddf30a822175a354a1e

Download Submit
\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
10b2ffcc43ebfccc3982ba69a474167e

SHA1
007015974280d76feb3cef81f96da22e29ee8a46

SHA256
4bc5bd684271afbd2091b51fad30bbe4241e90f6c9555c8a62ebfbdd7c30076c

SHA512
dc7bfcba82be51b29696294a192754dc79ee6ecb6a636be2f519d511eeacf81e0700c4ea90a161ea89be7b2ffc34f9982e6329ac501d11eae153016cf4de1b64

Download Submit
\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
9b37410e07cd10d92cc4da8b496a1932

SHA1
ede8d83d503f5a7de80fdc6c01ba09dee1cbf2fa

SHA256
13ca93f679ba8fa359f883e37777d60583df8c2ff06e33ac65587579d73daa34

SHA512
bfa0f2b3ac9bc93c5cdde58e085990ce54d3c0f03b5eceffc7190be3099634558272a01ee9afc06e0304233492f9b6b0851001bcf07b8be1e1ce681479681db8

Download Submit
\Windows\SysWOW64\netupdsrv.exe

Filesize
158KB

MD5
693f6b9d48a52d80d4b5b13c0968eed1

SHA1
9912458737cc6af38967df48ad20c58e1b2334f5

SHA256
85f487f91e89677663a5411b02180d7026f5ba3a96ec4742456c4d28dfc7a907

SHA512
0321437beea6f10a7fde5d9051d7c36b20f7b3b7bd9fa15858071c25b20c3de8519f4a04110fcfb7546923b7e977fdcad4cde3fef949854242b5d9f026588e34

Download Submit
memory/808-71-0x0000000000000000-mapping.dmp

Download
memory/916-62-0x0000000000000000-mapping.dmp

Download
memory/1512-64-0x0000000000000000-mapping.dmp

Download
memory/1532-61-0x0000000000000000-mapping.dmp

Download
memory/1576-59-0x0000000000000000-mapping.dmp

Download
memory/1584-58-0x0000000000000000-mapping.dmp

Download
memory/1712-77-0x0000000000000000-mapping.dmp

Download
memory/2012-69-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/2012-54-0x0000000075E01000-0x0000000075E03000-memory.dmp

Filesize
8KB

Download
memory/2012-55-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download