43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16

Analysis

max time kernel
249s
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 10:57

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General

Target

43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
Size

446KB
MD5

08d1101774d5c33748639d68ced23e36
SHA1

e3d112b4e70ee3da615e9fafbe7aaa1202f1f186
SHA256

43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16
SHA512

53b1556f2f790eef64479a3c410f9a86bbf81146868e16477c1a1f170ede0168c5b8fc9b789c89c6111c03790d4d8d6a6ba848a23d2ed5a2ad376897f8ba08c5
SSDEEP

6144:XzfSZ8vRxCRxYRAMRX0KHXdFP5WgUykA2GPJRC295vdZ6Wrc5C0cpefagQ0:2SY/uNFPN72GhRb1ZJgQ0

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

Processes:

43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe

description ioc process

File created C:\Windows\system32\drivers\nethfdrv.sys 43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
Executes dropped EXE 2 IoCs

Processes:

installd.exenethtsrv.exe

pid process

1548 installd.exe
1924 nethtsrv.exe

description	ioc	process
File created	C:\Windows\system32\drivers\nethfdrv.sys	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe

pid	process
1548	installd.exe
1924	nethtsrv.exe

Loads dropped DLL 8 IoCs

Processes:

43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exeinstalld.exenethtsrv.exe

pid	process
860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
1548	installd.exe
860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
1924	nethtsrv.exe
1924	nethtsrv.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:

43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe

description	ioc	process
File created	C:\Windows\SysWOW64\hfpapi.dll	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
File created	C:\Windows\SysWOW64\installd.exe	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
File created	C:\Windows\SysWOW64\nethtsrv.exe	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
File created	C:\Windows\SysWOW64\hfnapi.dll	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe

Drops file in Program Files directory 3 IoCs

Processes:

43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe

description	ioc	process
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
File created	C:\Program Files (x86)\Common Files\Config\data.xml	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.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 27 IoCs

Processes:

43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exenet.exenet.exe

description	pid	process	target process
PID 860 wrote to memory of 1960	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	net.exe
PID 860 wrote to memory of 1960	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	net.exe
PID 860 wrote to memory of 1960	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	net.exe
PID 860 wrote to memory of 1960	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	net.exe
PID 1960 wrote to memory of 1720	1960	net.exe	net1.exe
PID 1960 wrote to memory of 1720	1960	net.exe	net1.exe
PID 1960 wrote to memory of 1720	1960	net.exe	net1.exe
PID 1960 wrote to memory of 1720	1960	net.exe	net1.exe
PID 860 wrote to memory of 864	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	net.exe
PID 860 wrote to memory of 864	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	net.exe
PID 860 wrote to memory of 864	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	net.exe
PID 860 wrote to memory of 864	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	net.exe
PID 864 wrote to memory of 1600	864	net.exe	net1.exe
PID 864 wrote to memory of 1600	864	net.exe	net1.exe
PID 864 wrote to memory of 1600	864	net.exe	net1.exe
PID 864 wrote to memory of 1600	864	net.exe	net1.exe
PID 860 wrote to memory of 1548	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	installd.exe
PID 860 wrote to memory of 1548	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	installd.exe
PID 860 wrote to memory of 1548	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	installd.exe
PID 860 wrote to memory of 1548	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	installd.exe
PID 860 wrote to memory of 1548	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	installd.exe
PID 860 wrote to memory of 1548	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	installd.exe
PID 860 wrote to memory of 1548	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	installd.exe
PID 860 wrote to memory of 1924	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	nethtsrv.exe
PID 860 wrote to memory of 1924	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	nethtsrv.exe
PID 860 wrote to memory of 1924	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	nethtsrv.exe
PID 860 wrote to memory of 1924	860	43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe	nethtsrv.exe

C:\Users\Admin\AppData\Local\Temp\43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.exe
"C:\Users\Admin\AppData\Local\Temp\43a21be7a521f039542105801ba98ff46a0159ea4f4f27a72d6cd39afd029f16.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:860

C:\Windows\SysWOW64\net.exe
net stop nethttpservice
2⤵
- Suspicious use of WriteProcessMemory
PID:1960

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:864

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:1548

C:\Windows\SysWOW64\nethtsrv.exe
"C:\Windows\system32\nethtsrv.exe" -nfdi
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1924

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
b06c4d1c506858c92f96e39b67f3f142

SHA1
91b09b1412247016c0cedbbdfedd670b9ce1fcbc

SHA256
3c6a2bcb70888ce14b525fd51e8b0fd6457590f115a4eca6268e880a3823b9ea

SHA512
58a47934216cee80497dae9639eac85251e26931b6ebc2bfc0012b52cf7334bc97004fead7c19d776d3bc83eb6ca5ad036dc40c34ea45160180f366b27844ea6

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

Filesize
241KB

MD5
424366167c789bbb926bd043c0f9eab5

SHA1
02467e17d41e8f02253fb87458c6efaba9111b94

SHA256
8170b81b28a23f09753c18513a937681f78a416ad3e5e1ed1d01b8bf1d502aa7

SHA512
9474c983cb0c9a492156a466ad027440706bd3bd246f8fb21069b6b5f8357f0cd1682ec8165511e33c5556b73875ffbf4a3fa439956be7856081a414368c1b5d

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

Filesize
108KB

MD5
21a947a3f67085d29b8e1004f483d618

SHA1
644e5f070e985e24fe17443a0155b8a2ce036733

SHA256
1096b3357002dd1f45e2bb284c05b09ecffe4cd01b5e7eeec5ad639613d5a791

SHA512
b19542cf20f858257df8aafb5c536fae87aaed839ba2bab19dab608a61e6240909a1e019718b9b1ae19ae8874e98ad5b3dc54446812a0ebe11aaaffe68804ca1

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

Filesize
176KB

MD5
fb10b940a7643b0753fd6f0fa9e07564

SHA1
362f709049e760f14226d250b5073ae1650cffa5

SHA256
22317d1a19a6d210b3877ceab0d179293e8f18dd7bc7250939b4f3bff3f24514

SHA512
0a75d7bd385938eb7bee796fbcd8e0ee915986a2b658e2a4dcc8597f2170f07d35b6251c8b7de20dc5bdd23af14e42f3cb4ce150e581f6afdce45298af1448e8

Download Submit
\Users\Admin\AppData\Local\Temp\nsp22DF.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
\Users\Admin\AppData\Local\Temp\nsp22DF.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Users\Admin\AppData\Local\Temp\nsp22DF.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
b06c4d1c506858c92f96e39b67f3f142

SHA1
91b09b1412247016c0cedbbdfedd670b9ce1fcbc

SHA256
3c6a2bcb70888ce14b525fd51e8b0fd6457590f115a4eca6268e880a3823b9ea

SHA512
58a47934216cee80497dae9639eac85251e26931b6ebc2bfc0012b52cf7334bc97004fead7c19d776d3bc83eb6ca5ad036dc40c34ea45160180f366b27844ea6

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
b06c4d1c506858c92f96e39b67f3f142

SHA1
91b09b1412247016c0cedbbdfedd670b9ce1fcbc

SHA256
3c6a2bcb70888ce14b525fd51e8b0fd6457590f115a4eca6268e880a3823b9ea

SHA512
58a47934216cee80497dae9639eac85251e26931b6ebc2bfc0012b52cf7334bc97004fead7c19d776d3bc83eb6ca5ad036dc40c34ea45160180f366b27844ea6

Download Submit
\Windows\SysWOW64\hfpapi.dll

Filesize
241KB

MD5
424366167c789bbb926bd043c0f9eab5

SHA1
02467e17d41e8f02253fb87458c6efaba9111b94

SHA256
8170b81b28a23f09753c18513a937681f78a416ad3e5e1ed1d01b8bf1d502aa7

SHA512
9474c983cb0c9a492156a466ad027440706bd3bd246f8fb21069b6b5f8357f0cd1682ec8165511e33c5556b73875ffbf4a3fa439956be7856081a414368c1b5d

Download Submit
\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
21a947a3f67085d29b8e1004f483d618

SHA1
644e5f070e985e24fe17443a0155b8a2ce036733

SHA256
1096b3357002dd1f45e2bb284c05b09ecffe4cd01b5e7eeec5ad639613d5a791

SHA512
b19542cf20f858257df8aafb5c536fae87aaed839ba2bab19dab608a61e6240909a1e019718b9b1ae19ae8874e98ad5b3dc54446812a0ebe11aaaffe68804ca1

Download Submit
\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
fb10b940a7643b0753fd6f0fa9e07564

SHA1
362f709049e760f14226d250b5073ae1650cffa5

SHA256
22317d1a19a6d210b3877ceab0d179293e8f18dd7bc7250939b4f3bff3f24514

SHA512
0a75d7bd385938eb7bee796fbcd8e0ee915986a2b658e2a4dcc8597f2170f07d35b6251c8b7de20dc5bdd23af14e42f3cb4ce150e581f6afdce45298af1448e8

Download Submit
memory/860-54-0x0000000076391000-0x0000000076393000-memory.dmp

Filesize
8KB

Download
memory/864-60-0x0000000000000000-mapping.dmp

Download
memory/1548-63-0x0000000000000000-mapping.dmp

Download
memory/1600-61-0x0000000000000000-mapping.dmp

Download
memory/1720-58-0x0000000000000000-mapping.dmp

Download
memory/1924-69-0x0000000000000000-mapping.dmp

Download
memory/1960-57-0x0000000000000000-mapping.dmp

Download