2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5

Analysis

max time kernel
196s
max time network
34s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 10:29

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General

Target

2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
Size

601KB
MD5

3033793cdcf6068f2e163a9ebc91ebc3
SHA1

6a04fbf61fc5bbc4e29f19e7e458992326ec68e2
SHA256

2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5
SHA512

ae80a42a51c2ee87d3a4fa13acf34712c44a17bd0e6d4a0b1129c431b78d465c2ac6333d58fd7d43a3c28db51cb7790b7346a709ee02c3988681eff804b30af5
SSDEEP

12288:VIny5DYT8tSg0Bzh9aHUC2UHOYqkK4tKqXku9FEbFJMc7PRSszc0:hUTwTHmkK4kSkucJ+cYQc

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

Processes:

2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe

description ioc process

File created C:\Windows\system32\drivers\nethfdrv.sys 2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
Executes dropped EXE 3 IoCs

Processes:

installd.exenethtsrv.exenetupdsrv.exe

pid process

748 installd.exe
1136 nethtsrv.exe
1708 netupdsrv.exe

description	ioc	process
File created	C:\Windows\system32\drivers\nethfdrv.sys	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe

pid	process
748	installd.exe
1136	nethtsrv.exe
1708	netupdsrv.exe

Loads dropped DLL 9 IoCs

Processes:

2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exeinstalld.exenethtsrv.exe

pid	process
856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
748	installd.exe
856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
1136	nethtsrv.exe
1136	nethtsrv.exe
856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.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:

2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe

description	ioc	process
File created	C:\Windows\SysWOW64\hfnapi.dll	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
File created	C:\Windows\SysWOW64\hfpapi.dll	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
File created	C:\Windows\SysWOW64\installd.exe	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
File created	C:\Windows\SysWOW64\nethtsrv.exe	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe

Drops file in Program Files directory 3 IoCs

Processes:

2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe

description	ioc	process
File created	C:\Program Files (x86)\Common Files\Config\data.xml	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.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

464

pid	process
464

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exenet.exenet.exe

description	pid	process	target process
PID 856 wrote to memory of 376	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	net.exe
PID 856 wrote to memory of 376	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	net.exe
PID 856 wrote to memory of 376	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	net.exe
PID 856 wrote to memory of 376	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	net.exe
PID 376 wrote to memory of 1720	376	net.exe	net1.exe
PID 376 wrote to memory of 1720	376	net.exe	net1.exe
PID 376 wrote to memory of 1720	376	net.exe	net1.exe
PID 376 wrote to memory of 1720	376	net.exe	net1.exe
PID 856 wrote to memory of 296	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	net.exe
PID 856 wrote to memory of 296	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	net.exe
PID 856 wrote to memory of 296	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	net.exe
PID 856 wrote to memory of 296	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	net.exe
PID 296 wrote to memory of 904	296	net.exe	net1.exe
PID 296 wrote to memory of 904	296	net.exe	net1.exe
PID 296 wrote to memory of 904	296	net.exe	net1.exe
PID 296 wrote to memory of 904	296	net.exe	net1.exe
PID 856 wrote to memory of 748	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	installd.exe
PID 856 wrote to memory of 748	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	installd.exe
PID 856 wrote to memory of 748	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	installd.exe
PID 856 wrote to memory of 748	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	installd.exe
PID 856 wrote to memory of 748	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	installd.exe
PID 856 wrote to memory of 748	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	installd.exe
PID 856 wrote to memory of 748	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	installd.exe
PID 856 wrote to memory of 1136	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	nethtsrv.exe
PID 856 wrote to memory of 1136	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	nethtsrv.exe
PID 856 wrote to memory of 1136	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	nethtsrv.exe
PID 856 wrote to memory of 1136	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	nethtsrv.exe
PID 856 wrote to memory of 1708	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	netupdsrv.exe
PID 856 wrote to memory of 1708	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	netupdsrv.exe
PID 856 wrote to memory of 1708	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	netupdsrv.exe
PID 856 wrote to memory of 1708	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	netupdsrv.exe
PID 856 wrote to memory of 1708	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	netupdsrv.exe
PID 856 wrote to memory of 1708	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	netupdsrv.exe
PID 856 wrote to memory of 1708	856	2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe	netupdsrv.exe

C:\Users\Admin\AppData\Local\Temp\2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.exe
"C:\Users\Admin\AppData\Local\Temp\2fcbf9a5ed962182d239fcd21e793daed62c497bc42d1904319a46af2909ffc5.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:856

C:\Windows\SysWOW64\net.exe
net stop nethttpservice
2⤵
- Suspicious use of WriteProcessMemory
PID:376

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop nethttpservice
3⤵
PID:1720

C:\Windows\SysWOW64\net.exe
net stop serviceupdater
2⤵
- Suspicious use of WriteProcessMemory
PID:296

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop serviceupdater
3⤵
PID:904

C:\Windows\SysWOW64\installd.exe
"C:\Windows\system32\installd.exe" nethfdrv
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:748

C:\Windows\SysWOW64\nethtsrv.exe
"C:\Windows\system32\nethtsrv.exe" -nfdi
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1136

C:\Windows\SysWOW64\netupdsrv.exe
"C:\Windows\system32\netupdsrv.exe" -nfdi
2⤵
- Executes dropped EXE
PID:1708

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

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
8912b56c85206e4282c0b48f2e046b00

SHA1
1d90a09987b685ad1471ff9152cee461e9782213

SHA256
d02f33b1e693cc386f44153cb9f186a5694b0bb8d160cd69ec232d732298d296

SHA512
4754b5d198abe1869fc2144a746189234dd243844b3876f7b9aae87e2c9fd1073bb3e2df91bc06aea5e64ded5eddcc237daeefae3812b69963ce16bc2038d059

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

Filesize
241KB

MD5
09dfa0e7c47022b3217677f52f258be8

SHA1
dabb9f3b3399ba73b181d6061ec6dd0b210abfae

SHA256
f9286c442ee5a6a02851f75c347d35507adb67a9c994e29a88a065cb8aca6836

SHA512
72d7dd9d623e9994b182749c613af90eaf211db79761b90cc438832ae9380afe037f401cb20be5ce6502b80759ecd446c567015824ec136d9f25ad53b90411ce

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

Filesize
108KB

MD5
36ef2286f0ce99f63bb528dd454852b0

SHA1
f7f2b1e71214cd72ccda576a792d4e1920058df8

SHA256
28380a56111b68eaad4030bee14f61b12a2102143def86266b60f8dd8978e6c2

SHA512
18f83f4522f918e2df33b4c22c63e9999cc6bfe4b14f792271ad246a69dc14d0d6efd1e0893019027b7aeef406cb544d74347b1afeac4e27707f3d8b176f6f80

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

Filesize
176KB

MD5
99d0ad7af34c8a7ada18423ab7b3aab1

SHA1
903cc17fe3948fc718c2e988dbf2e2010073215f

SHA256
5b230192ee550e1dc14ccf87431e5c42cf15509a454100bd1ec9b028fd590aec

SHA512
82f91f072c78dea52937364c0d08b58809e1be499f1003a44d7fa8c824cfd94ce4dd0aefff2f85662c694be8a835cfcca88a0d08a4edb51035ff368d194367c7

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

Filesize
158KB

MD5
b28cb7e780efc1671bf30e495b526df4

SHA1
0f028a845a7c313feff8540137d8d8e08d06d908

SHA256
1f54b8c4fef919b14f9675f6bf8d3e19ac9291b236bea34abffca97a1b61cc26

SHA512
ae834d8496cb0d5e1deff3bb196fba7f9918fdefdb80e18b5bb8719affed637bb612cf6b03db7fca45178b26ebf6468927c893ed6a74d1cfc6e7c470117a9df5

Download Submit
\Users\Admin\AppData\Local\Temp\nsp38DF.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
\Users\Admin\AppData\Local\Temp\nsp38DF.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Users\Admin\AppData\Local\Temp\nsp38DF.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
8912b56c85206e4282c0b48f2e046b00

SHA1
1d90a09987b685ad1471ff9152cee461e9782213

SHA256
d02f33b1e693cc386f44153cb9f186a5694b0bb8d160cd69ec232d732298d296

SHA512
4754b5d198abe1869fc2144a746189234dd243844b3876f7b9aae87e2c9fd1073bb3e2df91bc06aea5e64ded5eddcc237daeefae3812b69963ce16bc2038d059

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
8912b56c85206e4282c0b48f2e046b00

SHA1
1d90a09987b685ad1471ff9152cee461e9782213

SHA256
d02f33b1e693cc386f44153cb9f186a5694b0bb8d160cd69ec232d732298d296

SHA512
4754b5d198abe1869fc2144a746189234dd243844b3876f7b9aae87e2c9fd1073bb3e2df91bc06aea5e64ded5eddcc237daeefae3812b69963ce16bc2038d059

Download Submit
\Windows\SysWOW64\hfpapi.dll

Filesize
241KB

MD5
09dfa0e7c47022b3217677f52f258be8

SHA1
dabb9f3b3399ba73b181d6061ec6dd0b210abfae

SHA256
f9286c442ee5a6a02851f75c347d35507adb67a9c994e29a88a065cb8aca6836

SHA512
72d7dd9d623e9994b182749c613af90eaf211db79761b90cc438832ae9380afe037f401cb20be5ce6502b80759ecd446c567015824ec136d9f25ad53b90411ce

Download Submit
\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
36ef2286f0ce99f63bb528dd454852b0

SHA1
f7f2b1e71214cd72ccda576a792d4e1920058df8

SHA256
28380a56111b68eaad4030bee14f61b12a2102143def86266b60f8dd8978e6c2

SHA512
18f83f4522f918e2df33b4c22c63e9999cc6bfe4b14f792271ad246a69dc14d0d6efd1e0893019027b7aeef406cb544d74347b1afeac4e27707f3d8b176f6f80

Download Submit
\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
99d0ad7af34c8a7ada18423ab7b3aab1

SHA1
903cc17fe3948fc718c2e988dbf2e2010073215f

SHA256
5b230192ee550e1dc14ccf87431e5c42cf15509a454100bd1ec9b028fd590aec

SHA512
82f91f072c78dea52937364c0d08b58809e1be499f1003a44d7fa8c824cfd94ce4dd0aefff2f85662c694be8a835cfcca88a0d08a4edb51035ff368d194367c7

Download Submit
\Windows\SysWOW64\netupdsrv.exe

Filesize
158KB

MD5
b28cb7e780efc1671bf30e495b526df4

SHA1
0f028a845a7c313feff8540137d8d8e08d06d908

SHA256
1f54b8c4fef919b14f9675f6bf8d3e19ac9291b236bea34abffca97a1b61cc26

SHA512
ae834d8496cb0d5e1deff3bb196fba7f9918fdefdb80e18b5bb8719affed637bb612cf6b03db7fca45178b26ebf6468927c893ed6a74d1cfc6e7c470117a9df5

Download Submit
memory/296-61-0x0000000000000000-mapping.dmp

Download
memory/376-58-0x0000000000000000-mapping.dmp

Download
memory/748-64-0x0000000000000000-mapping.dmp

Download
memory/856-54-0x0000000075831000-0x0000000075833000-memory.dmp

Filesize
8KB

Download
memory/856-69-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/856-56-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/904-62-0x0000000000000000-mapping.dmp

Download
memory/1136-71-0x0000000000000000-mapping.dmp

Download
memory/1708-77-0x0000000000000000-mapping.dmp

Download
memory/1720-59-0x0000000000000000-mapping.dmp

Download