aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137

Analysis

max time kernel
211s
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 10:53

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General

Target

aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
Size

446KB
MD5

c64fea75503018e1a4ed2ad81af968c9
SHA1

13168e19702573d2df73c6619021542f645b9d39
SHA256

aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137
SHA512

66561db733f65f9d621b12615a8ec145b51740f538fa232f266a0d4a755c6f2c04579e0611f80a22df36cecb167286be61d50bc38ceb2b431f9cfe79bf9896f8
SSDEEP

12288:ICpGyWmpFkEpju+c0qVW8NoDeuUYzAjX/MxvR6:ICcyWmjkElu+jqVTUe0q/+6

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

Processes:

aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe

description ioc process

File created C:\Windows\system32\drivers\nethfdrv.sys aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
Executes dropped EXE 3 IoCs

Processes:

installd.exenethtsrv.exenetupdsrv.exe

pid process

1556 installd.exe
1668 nethtsrv.exe
1748 netupdsrv.exe

description	ioc	process
File created	C:\Windows\system32\drivers\nethfdrv.sys	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe

pid	process
1556	installd.exe
1668	nethtsrv.exe
1748	netupdsrv.exe

Loads dropped DLL 9 IoCs

Processes:

aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exeinstalld.exenethtsrv.exe

pid	process
1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
1556	installd.exe
1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
1668	nethtsrv.exe
1668	nethtsrv.exe
1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.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:

aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe

description	ioc	process
File created	C:\Windows\SysWOW64\hfnapi.dll	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
File created	C:\Windows\SysWOW64\hfpapi.dll	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
File created	C:\Windows\SysWOW64\installd.exe	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
File created	C:\Windows\SysWOW64\nethtsrv.exe	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe

Drops file in Program Files directory 3 IoCs

Processes:

aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe

description	ioc	process
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
File created	C:\Program Files (x86)\Common Files\Config\data.xml	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.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:

aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exenet.exenet.exe

description	pid	process	target process
PID 1496 wrote to memory of 780	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	net.exe
PID 1496 wrote to memory of 780	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	net.exe
PID 1496 wrote to memory of 780	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	net.exe
PID 1496 wrote to memory of 780	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	net.exe
PID 780 wrote to memory of 560	780	net.exe	net1.exe
PID 780 wrote to memory of 560	780	net.exe	net1.exe
PID 780 wrote to memory of 560	780	net.exe	net1.exe
PID 780 wrote to memory of 560	780	net.exe	net1.exe
PID 1496 wrote to memory of 268	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	net.exe
PID 1496 wrote to memory of 268	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	net.exe
PID 1496 wrote to memory of 268	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	net.exe
PID 1496 wrote to memory of 268	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	net.exe
PID 268 wrote to memory of 1536	268	net.exe	net1.exe
PID 268 wrote to memory of 1536	268	net.exe	net1.exe
PID 268 wrote to memory of 1536	268	net.exe	net1.exe
PID 268 wrote to memory of 1536	268	net.exe	net1.exe
PID 1496 wrote to memory of 1556	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	installd.exe
PID 1496 wrote to memory of 1556	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	installd.exe
PID 1496 wrote to memory of 1556	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	installd.exe
PID 1496 wrote to memory of 1556	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	installd.exe
PID 1496 wrote to memory of 1556	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	installd.exe
PID 1496 wrote to memory of 1556	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	installd.exe
PID 1496 wrote to memory of 1556	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	installd.exe
PID 1496 wrote to memory of 1668	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	nethtsrv.exe
PID 1496 wrote to memory of 1668	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	nethtsrv.exe
PID 1496 wrote to memory of 1668	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	nethtsrv.exe
PID 1496 wrote to memory of 1668	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	nethtsrv.exe
PID 1496 wrote to memory of 1748	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	netupdsrv.exe
PID 1496 wrote to memory of 1748	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	netupdsrv.exe
PID 1496 wrote to memory of 1748	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	netupdsrv.exe
PID 1496 wrote to memory of 1748	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	netupdsrv.exe
PID 1496 wrote to memory of 1748	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	netupdsrv.exe
PID 1496 wrote to memory of 1748	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	netupdsrv.exe
PID 1496 wrote to memory of 1748	1496	aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe	netupdsrv.exe

C:\Users\Admin\AppData\Local\Temp\aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.exe
"C:\Users\Admin\AppData\Local\Temp\aef24e2997b263198b55b42723d4e13016852e713c52d46083c055bfe98b8137.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:1496

C:\Windows\SysWOW64\net.exe
net stop nethttpservice
2⤵
- Suspicious use of WriteProcessMemory
PID:780

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop nethttpservice
3⤵
PID:560

C:\Windows\SysWOW64\net.exe
net stop serviceupdater
2⤵
- Suspicious use of WriteProcessMemory
PID:268

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop serviceupdater
3⤵
PID:1536

C:\Windows\SysWOW64\installd.exe
"C:\Windows\system32\installd.exe" nethfdrv
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1556

C:\Windows\SysWOW64\nethtsrv.exe
"C:\Windows\system32\nethtsrv.exe" -nfdi
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1668

C:\Windows\SysWOW64\netupdsrv.exe
"C:\Windows\system32\netupdsrv.exe" -nfdi
2⤵
- Executes dropped EXE
PID:1748

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
53e33a7b3538590545cd838adaf4ea6d

SHA1
2dd4ae8e05db5740a2ccae63cdfd16aaf79a1e8e

SHA256
0f9b50f579b3ab92d4607e91f61cfda1e5d5ebdec0502e94cb24bd0bb898eeb6

SHA512
2bf6d3c76e3a289f5036fc69dc20d9ed1280853ac328f7705c42db6a1c6138019a9ccff9a50cb746ee4b541496b44f7ea7586c34aadf3fc1ee31835b8bad6227

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

Filesize
244KB

MD5
1a9d0eb447cf5367bc5c754e4a39ea74

SHA1
1d4496befe956da0e549bfa16734d1a2f6c43a01

SHA256
117721c6655456c940a060d28110edd982f615e00b7287b23782809408496394

SHA512
cf57ec3162c1a4d8f0be5f3e009e5b4faa2ff56677f21f14e516ea6a029e7c80f23f0d69508481be12eac269e70a79d684a240671d1012a89f0049194bb3190e

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

Filesize
108KB

MD5
eed1bb7545e8ddefc1c83b246c9396ff

SHA1
c363695fa6323b0f1dcc9f7b1d92c8ff439f47e9

SHA256
13fe118ba4b76be805c238feb5079c758db965ddb03f15937ffc1a45ef01c49a

SHA512
5e1128688922e9593201646bd1e74945a7020fe9395cdbd028b420af8959a6ed94586efcd093a6598610b16255ca2512f89fd16a020daa5eb60871e9e9cea5d0

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

Filesize
176KB

MD5
7b62b7057f9c9a198c9113f039927213

SHA1
44f1f5c34975e53735dd1208915f6501dafce2a6

SHA256
7ba18b86e9bd88d27cdcb41c0da16dd02b796097344f8f7b84567e9eee76d908

SHA512
d8f78ba7bf6adcf08d63eab890b1082bffbd701f22f5e1c890304011d6cdc98398e18582b77f8c445aaea22c57de445d321a57ca31488c74f7f5d0cc956e4322

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

Filesize
158KB

MD5
4f6feb0b0754d052407faad935096209

SHA1
98b9d447cb7d3ff9c6013111db79c8d5194e1cdd

SHA256
a65336e1a0815a5a142555806471e39e6acf0cc6b0c2903677cf5dd3f9933f15

SHA512
f6a46b0bf29f98f1243a4a04c327259f07e7d0a0e0885cc89ae733ba7f62e6492d9a3f3d5d9e35d402050f01417b9e2d4a71e18355151e667b48663a3996dcf0

Download Submit
\Users\Admin\AppData\Local\Temp\nsz8A29.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
\Users\Admin\AppData\Local\Temp\nsz8A29.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Users\Admin\AppData\Local\Temp\nsz8A29.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
53e33a7b3538590545cd838adaf4ea6d

SHA1
2dd4ae8e05db5740a2ccae63cdfd16aaf79a1e8e

SHA256
0f9b50f579b3ab92d4607e91f61cfda1e5d5ebdec0502e94cb24bd0bb898eeb6

SHA512
2bf6d3c76e3a289f5036fc69dc20d9ed1280853ac328f7705c42db6a1c6138019a9ccff9a50cb746ee4b541496b44f7ea7586c34aadf3fc1ee31835b8bad6227

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
53e33a7b3538590545cd838adaf4ea6d

SHA1
2dd4ae8e05db5740a2ccae63cdfd16aaf79a1e8e

SHA256
0f9b50f579b3ab92d4607e91f61cfda1e5d5ebdec0502e94cb24bd0bb898eeb6

SHA512
2bf6d3c76e3a289f5036fc69dc20d9ed1280853ac328f7705c42db6a1c6138019a9ccff9a50cb746ee4b541496b44f7ea7586c34aadf3fc1ee31835b8bad6227

Download Submit
\Windows\SysWOW64\hfpapi.dll

Filesize
244KB

MD5
1a9d0eb447cf5367bc5c754e4a39ea74

SHA1
1d4496befe956da0e549bfa16734d1a2f6c43a01

SHA256
117721c6655456c940a060d28110edd982f615e00b7287b23782809408496394

SHA512
cf57ec3162c1a4d8f0be5f3e009e5b4faa2ff56677f21f14e516ea6a029e7c80f23f0d69508481be12eac269e70a79d684a240671d1012a89f0049194bb3190e

Download Submit
\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
eed1bb7545e8ddefc1c83b246c9396ff

SHA1
c363695fa6323b0f1dcc9f7b1d92c8ff439f47e9

SHA256
13fe118ba4b76be805c238feb5079c758db965ddb03f15937ffc1a45ef01c49a

SHA512
5e1128688922e9593201646bd1e74945a7020fe9395cdbd028b420af8959a6ed94586efcd093a6598610b16255ca2512f89fd16a020daa5eb60871e9e9cea5d0

Download Submit
\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
7b62b7057f9c9a198c9113f039927213

SHA1
44f1f5c34975e53735dd1208915f6501dafce2a6

SHA256
7ba18b86e9bd88d27cdcb41c0da16dd02b796097344f8f7b84567e9eee76d908

SHA512
d8f78ba7bf6adcf08d63eab890b1082bffbd701f22f5e1c890304011d6cdc98398e18582b77f8c445aaea22c57de445d321a57ca31488c74f7f5d0cc956e4322

Download Submit
\Windows\SysWOW64\netupdsrv.exe

Filesize
158KB

MD5
4f6feb0b0754d052407faad935096209

SHA1
98b9d447cb7d3ff9c6013111db79c8d5194e1cdd

SHA256
a65336e1a0815a5a142555806471e39e6acf0cc6b0c2903677cf5dd3f9933f15

SHA512
f6a46b0bf29f98f1243a4a04c327259f07e7d0a0e0885cc89ae733ba7f62e6492d9a3f3d5d9e35d402050f01417b9e2d4a71e18355151e667b48663a3996dcf0

Download Submit
memory/268-60-0x0000000000000000-mapping.dmp

Download
memory/560-58-0x0000000000000000-mapping.dmp

Download
memory/780-57-0x0000000000000000-mapping.dmp

Download
memory/1496-54-0x0000000076391000-0x0000000076393000-memory.dmp

Filesize
8KB

Download
memory/1536-61-0x0000000000000000-mapping.dmp

Download
memory/1556-63-0x0000000000000000-mapping.dmp

Download
memory/1668-69-0x0000000000000000-mapping.dmp

Download
memory/1748-75-0x0000000000000000-mapping.dmp

Download