237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683

Analysis

max time kernel
279s
max time network
289s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 10:31

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General

Target

237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
Size

598KB
MD5

63a77879c8119d3a877e9bfee98c6376
SHA1

c639b571d95035cdc2681a448295205b4bcbc6b4
SHA256

237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683
SHA512

0389430e5cae8b48a14cb90cd695d73e4db33d5c3b38fb7322b621c346f75a973271836289e97cd6982bd471ecc8d5a33a1a7d06b0b61ea3b89cf2bc2bdc3be9
SSDEEP

12288:jIny5DYTV10frJYb4xQG+3ZfiIjg5FzMlQzyRoD1TBLsBvL:rUTV10frJYbUQvZfiIj5lQCoD9

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

Processes:

237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe

description ioc process

File created C:\Windows\system32\drivers\nethfdrv.sys 237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
Executes dropped EXE 1 IoCs

Processes:

installd.exe

pid process

3828 installd.exe

description	ioc	process
File created	C:\Windows\system32\drivers\nethfdrv.sys	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe

pid	process
3828	installd.exe

Loads dropped DLL 6 IoCs

Processes:

237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exeinstalld.exe

pid	process
1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
3828	installd.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:

237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe

description	ioc	process
File created	C:\Windows\SysWOW64\hfnapi.dll	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
File created	C:\Windows\SysWOW64\hfpapi.dll	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
File created	C:\Windows\SysWOW64\installd.exe	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
File created	C:\Windows\SysWOW64\nethtsrv.exe	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe

Drops file in Program Files directory 3 IoCs

Processes:

237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe

description	ioc	process
File created	C:\Program Files (x86)\Common Files\Config\data.xml	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.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 use of WriteProcessMemory 15 IoCs

Processes:

237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exenet.exenet.exe

description	pid	process	target process
PID 1392 wrote to memory of 2552	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	net.exe
PID 1392 wrote to memory of 2552	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	net.exe
PID 1392 wrote to memory of 2552	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	net.exe
PID 2552 wrote to memory of 444	2552	net.exe	net1.exe
PID 2552 wrote to memory of 444	2552	net.exe	net1.exe
PID 2552 wrote to memory of 444	2552	net.exe	net1.exe
PID 1392 wrote to memory of 4544	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	net.exe
PID 1392 wrote to memory of 4544	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	net.exe
PID 1392 wrote to memory of 4544	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	net.exe
PID 4544 wrote to memory of 1600	4544	net.exe	net1.exe
PID 4544 wrote to memory of 1600	4544	net.exe	net1.exe
PID 4544 wrote to memory of 1600	4544	net.exe	net1.exe
PID 1392 wrote to memory of 3828	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	installd.exe
PID 1392 wrote to memory of 3828	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	installd.exe
PID 1392 wrote to memory of 3828	1392	237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe	installd.exe

C:\Users\Admin\AppData\Local\Temp\237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.exe
"C:\Users\Admin\AppData\Local\Temp\237184cfc7fb4a151418bc5fce74298deb7fff3770a30408c25e0096b5f73683.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:1392

C:\Windows\SysWOW64\net.exe
net stop nethttpservice
2⤵
- Suspicious use of WriteProcessMemory
PID:2552

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop nethttpservice
3⤵
PID:444

C:\Windows\SysWOW64\net.exe
net stop serviceupdater
2⤵
- Suspicious use of WriteProcessMemory
PID:4544

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop serviceupdater
3⤵
PID:1600

C:\Windows\SysWOW64\installd.exe
"C:\Windows\system32\installd.exe" nethfdrv
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:3828

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nssFAB4.tmp\System.dll
Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
C:\Users\Admin\AppData\Local\Temp\nssFAB4.tmp\nsExec.dll
Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\nssFAB4.tmp\nsExec.dll
Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\nssFAB4.tmp\nsExec.dll
Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\nssFAB4.tmp\nsExec.dll
Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
C:\Windows\SysWOW64\hfnapi.dll
Filesize
106KB

MD5
0d8859fd63e06851664c9a5c332e1956

SHA1
a563057d943b34943aab6a154f298c55540d7af5

SHA256
095dea909c20a4e1fe79ec4215900ceab57a5bef969af4aef2c5fc58981814a9

SHA512
62c5b0b0c002868e98edd6e2ab9deda1b62673a51942498b006d6b8b465cf54c7480df8a6a207e20867ad7a4bc57399f64e66e74f65874be889ab4ae291a3470

Download Submit
C:\Windows\SysWOW64\hfnapi.dll
Filesize
106KB

MD5
0d8859fd63e06851664c9a5c332e1956

SHA1
a563057d943b34943aab6a154f298c55540d7af5

SHA256
095dea909c20a4e1fe79ec4215900ceab57a5bef969af4aef2c5fc58981814a9

SHA512
62c5b0b0c002868e98edd6e2ab9deda1b62673a51942498b006d6b8b465cf54c7480df8a6a207e20867ad7a4bc57399f64e66e74f65874be889ab4ae291a3470

Download Submit
C:\Windows\SysWOW64\installd.exe
Filesize
108KB

MD5
f0bc119c655f00f64f90468d08e92e7a

SHA1
c226f27b88b1d2bbf24ab83f28040b154fc9fc39

SHA256
8d6c96d58cd5a38e8194ab3ef99724ef28f97e8d86a05fa2616393aa737111a0

SHA512
ea498cf111560d15777de8b60973c1eb6ba821092926731eba2f488ee511b3acf8a23b44c080adc142935b370576d9720ba7ebc2bf2842e31868974978e4bec1

Download Submit
C:\Windows\SysWOW64\installd.exe
Filesize
108KB

MD5
f0bc119c655f00f64f90468d08e92e7a

SHA1
c226f27b88b1d2bbf24ab83f28040b154fc9fc39

SHA256
8d6c96d58cd5a38e8194ab3ef99724ef28f97e8d86a05fa2616393aa737111a0

SHA512
ea498cf111560d15777de8b60973c1eb6ba821092926731eba2f488ee511b3acf8a23b44c080adc142935b370576d9720ba7ebc2bf2842e31868974978e4bec1

Download Submit
memory/444-137-0x0000000000000000-mapping.dmp

Download
memory/1392-138-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/1392-132-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/1600-142-0x0000000000000000-mapping.dmp

Download
memory/2552-136-0x0000000000000000-mapping.dmp

Download
memory/3828-143-0x0000000000000000-mapping.dmp

Download
memory/4544-141-0x0000000000000000-mapping.dmp

Download