b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1

Analysis

max time kernel
227s
max time network
333s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 10:36

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General

Target

b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
Size

558KB
MD5

0972bc13010b6ce6ee911679864ad5b2
SHA1

0c232d695c13210eb824fc600ee1e097106c378e
SHA256

b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1
SHA512

d0ada37176d3b9e192bde964abbb44b28fe33a2d6bf6ceaca48793005a39046cc0bda87ab26ff2be38895438610575ca8959392f8dd9194e944bf7fd91a11d48
SSDEEP

12288:G2hB6DQbfsEQ2lnRjA4Laq0nU+0gSfnlVu46YF:aD0fDRjAdq0nrmrVF

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

Processes:

b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe

description ioc process

File created C:\Windows\system32\drivers\nethfdrv.sys b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
Executes dropped EXE 3 IoCs

Processes:

installd.exenethtsrv.exenetupdsrv.exe

pid process

900 installd.exe
1960 nethtsrv.exe
1252 netupdsrv.exe

description	ioc	process
File created	C:\Windows\system32\drivers\nethfdrv.sys	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe

pid	process
900	installd.exe
1960	nethtsrv.exe
1252	netupdsrv.exe

Loads dropped DLL 9 IoCs

Processes:

b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exeinstalld.exenethtsrv.exe

pid	process
288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
900	installd.exe
288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
1960	nethtsrv.exe
1960	nethtsrv.exe
288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.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:

b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe

description	ioc	process
File created	C:\Windows\SysWOW64\hfnapi.dll	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
File created	C:\Windows\SysWOW64\hfpapi.dll	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
File created	C:\Windows\SysWOW64\installd.exe	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
File created	C:\Windows\SysWOW64\nethtsrv.exe	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe

Drops file in Program Files directory 3 IoCs

Processes:

b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe

description	ioc	process
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
File created	C:\Program Files (x86)\Common Files\Config\data.xml	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.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:

b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exenet.exenet.exe

description	pid	process	target process
PID 288 wrote to memory of 436	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	net.exe
PID 288 wrote to memory of 436	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	net.exe
PID 288 wrote to memory of 436	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	net.exe
PID 288 wrote to memory of 436	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	net.exe
PID 436 wrote to memory of 1844	436	net.exe	net1.exe
PID 436 wrote to memory of 1844	436	net.exe	net1.exe
PID 436 wrote to memory of 1844	436	net.exe	net1.exe
PID 436 wrote to memory of 1844	436	net.exe	net1.exe
PID 288 wrote to memory of 1028	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	net.exe
PID 288 wrote to memory of 1028	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	net.exe
PID 288 wrote to memory of 1028	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	net.exe
PID 288 wrote to memory of 1028	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	net.exe
PID 1028 wrote to memory of 1788	1028	net.exe	net1.exe
PID 1028 wrote to memory of 1788	1028	net.exe	net1.exe
PID 1028 wrote to memory of 1788	1028	net.exe	net1.exe
PID 1028 wrote to memory of 1788	1028	net.exe	net1.exe
PID 288 wrote to memory of 900	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	installd.exe
PID 288 wrote to memory of 900	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	installd.exe
PID 288 wrote to memory of 900	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	installd.exe
PID 288 wrote to memory of 900	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	installd.exe
PID 288 wrote to memory of 900	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	installd.exe
PID 288 wrote to memory of 900	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	installd.exe
PID 288 wrote to memory of 900	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	installd.exe
PID 288 wrote to memory of 1960	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	nethtsrv.exe
PID 288 wrote to memory of 1960	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	nethtsrv.exe
PID 288 wrote to memory of 1960	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	nethtsrv.exe
PID 288 wrote to memory of 1960	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	nethtsrv.exe
PID 288 wrote to memory of 1252	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	netupdsrv.exe
PID 288 wrote to memory of 1252	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	netupdsrv.exe
PID 288 wrote to memory of 1252	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	netupdsrv.exe
PID 288 wrote to memory of 1252	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	netupdsrv.exe
PID 288 wrote to memory of 1252	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	netupdsrv.exe
PID 288 wrote to memory of 1252	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	netupdsrv.exe
PID 288 wrote to memory of 1252	288	b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe	netupdsrv.exe

C:\Users\Admin\AppData\Local\Temp\b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.exe
"C:\Users\Admin\AppData\Local\Temp\b34789a797ac4834484c01532d96f5ad1d8565e9c9ec41d899eacc6a145122f1.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:288

C:\Windows\SysWOW64\net.exe
net stop nethttpservice
2⤵
- Suspicious use of WriteProcessMemory
PID:436

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop nethttpservice
3⤵
PID:1844

C:\Windows\SysWOW64\net.exe
net stop serviceupdater
2⤵
- Suspicious use of WriteProcessMemory
PID:1028

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop serviceupdater
3⤵
PID:1788

C:\Windows\SysWOW64\installd.exe
"C:\Windows\system32\installd.exe" nethfdrv
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:900

C:\Windows\SysWOW64\nethtsrv.exe
"C:\Windows\system32\nethtsrv.exe" -nfdi
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1960

C:\Windows\SysWOW64\netupdsrv.exe
"C:\Windows\system32\netupdsrv.exe" -nfdi
2⤵
- Executes dropped EXE
PID:1252

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
0aa00344dd7ce19d753cd4bab7ca6eea

SHA1
daf304197b74b68339ee40b6b0647e11992d63b9

SHA256
b53ffc539134e945cb0aeeeb9bdd5cd48bb973c69a4f3b43529222b5e8dfff97

SHA512
04afba21c414a902412ab791476a6f12b1a720d98baef205b55cc57030279b0cc0685ddd0cbb3632260353e037cc3fdff82c86bebd636753fa4fab570f564b58

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

Filesize
241KB

MD5
36e9415a2abd19f66104ac996611d184

SHA1
ae99f86c33973d0b4cc87f65c56fa296398ca93d

SHA256
a6b8069bb36dbc84b37ecd3699a2db103ec22ce5e8700fe6c602d1b8eeeae0fe

SHA512
d4fe24bb49967dc8e23ef30930ec2e346513343b4d139a666a79048a74797fbcbbe73b3a7ab1ab22ee0b1e304d491bf80a3cf1fc7d1850f12ea3fa4820a56e2f

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

Filesize
108KB

MD5
593223208c930c8dc768eb4a6dd56feb

SHA1
aed124c3ae90384577663ce5f29304b11128c466

SHA256
c958abb34e5b4dde5f709ed90640011b55b75a7383e3b0a73c13a08df4bb9963

SHA512
7dc965f915f93f9919a1383bccf3ae438ffff0366f5507523bebd9a273282f11bea2f19eaa5c57f4de7d3621c69fa929140d1e5be768f72e547e8607eaf3efb8

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

Filesize
176KB

MD5
7908196bed0f90219608545f58ae7bd4

SHA1
d18b2004d12d7e48f6af829b40e776cd34657b6b

SHA256
77560b23bcafae658b478ea79bba982c35ddda8ec866d79432c9db216db8948d

SHA512
f8eefe449ca824526e32555d8bfaea4bd146334b2d2c009950cc6124fc5e7ff953f7a433989a3015035d02e40ae31bb610a2de36b8d2199e8fe297b564efb8cc

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

Filesize
159KB

MD5
c786b631d4c06fabdc4d17b4cd773ba4

SHA1
47208c7ea0dd86e6d9b25727ac2a0c705e4a356c

SHA256
af71e17bc4c55f1abcb061db80ffbeaa26928948c1996b3fbdaf18488c92e9cf

SHA512
af6adf326b4fa9b05d2a307e1a31d608f4025c63dba741ef8fac10c4b486f9b8b0f7e64e6d7458d6f37ddfcf03928d737ef37adf6134e23a90ec8b99f17eec9d

Download Submit
\Users\Admin\AppData\Local\Temp\nsz2197.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
\Users\Admin\AppData\Local\Temp\nsz2197.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Users\Admin\AppData\Local\Temp\nsz2197.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
0aa00344dd7ce19d753cd4bab7ca6eea

SHA1
daf304197b74b68339ee40b6b0647e11992d63b9

SHA256
b53ffc539134e945cb0aeeeb9bdd5cd48bb973c69a4f3b43529222b5e8dfff97

SHA512
04afba21c414a902412ab791476a6f12b1a720d98baef205b55cc57030279b0cc0685ddd0cbb3632260353e037cc3fdff82c86bebd636753fa4fab570f564b58

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
0aa00344dd7ce19d753cd4bab7ca6eea

SHA1
daf304197b74b68339ee40b6b0647e11992d63b9

SHA256
b53ffc539134e945cb0aeeeb9bdd5cd48bb973c69a4f3b43529222b5e8dfff97

SHA512
04afba21c414a902412ab791476a6f12b1a720d98baef205b55cc57030279b0cc0685ddd0cbb3632260353e037cc3fdff82c86bebd636753fa4fab570f564b58

Download Submit
\Windows\SysWOW64\hfpapi.dll

Filesize
241KB

MD5
36e9415a2abd19f66104ac996611d184

SHA1
ae99f86c33973d0b4cc87f65c56fa296398ca93d

SHA256
a6b8069bb36dbc84b37ecd3699a2db103ec22ce5e8700fe6c602d1b8eeeae0fe

SHA512
d4fe24bb49967dc8e23ef30930ec2e346513343b4d139a666a79048a74797fbcbbe73b3a7ab1ab22ee0b1e304d491bf80a3cf1fc7d1850f12ea3fa4820a56e2f

Download Submit
\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
593223208c930c8dc768eb4a6dd56feb

SHA1
aed124c3ae90384577663ce5f29304b11128c466

SHA256
c958abb34e5b4dde5f709ed90640011b55b75a7383e3b0a73c13a08df4bb9963

SHA512
7dc965f915f93f9919a1383bccf3ae438ffff0366f5507523bebd9a273282f11bea2f19eaa5c57f4de7d3621c69fa929140d1e5be768f72e547e8607eaf3efb8

Download Submit
\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
7908196bed0f90219608545f58ae7bd4

SHA1
d18b2004d12d7e48f6af829b40e776cd34657b6b

SHA256
77560b23bcafae658b478ea79bba982c35ddda8ec866d79432c9db216db8948d

SHA512
f8eefe449ca824526e32555d8bfaea4bd146334b2d2c009950cc6124fc5e7ff953f7a433989a3015035d02e40ae31bb610a2de36b8d2199e8fe297b564efb8cc

Download Submit
\Windows\SysWOW64\netupdsrv.exe

Filesize
159KB

MD5
c786b631d4c06fabdc4d17b4cd773ba4

SHA1
47208c7ea0dd86e6d9b25727ac2a0c705e4a356c

SHA256
af71e17bc4c55f1abcb061db80ffbeaa26928948c1996b3fbdaf18488c92e9cf

SHA512
af6adf326b4fa9b05d2a307e1a31d608f4025c63dba741ef8fac10c4b486f9b8b0f7e64e6d7458d6f37ddfcf03928d737ef37adf6134e23a90ec8b99f17eec9d

Download Submit
memory/288-54-0x0000000074DA1000-0x0000000074DA3000-memory.dmp

Filesize
8KB

Download
memory/288-69-0x0000000000370000-0x00000000007BE000-memory.dmp

Filesize
4.3MB

Download
memory/288-55-0x0000000000370000-0x00000000007BE000-memory.dmp

Filesize
4.3MB

Download
memory/436-58-0x0000000000000000-mapping.dmp

Download
memory/900-64-0x0000000000000000-mapping.dmp

Download
memory/1028-61-0x0000000000000000-mapping.dmp

Download
memory/1252-77-0x0000000000000000-mapping.dmp

Download
memory/1788-62-0x0000000000000000-mapping.dmp

Download
memory/1844-59-0x0000000000000000-mapping.dmp

Download
memory/1960-71-0x0000000000000000-mapping.dmp

Download