b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0

Analysis

max time kernel
158s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 10:15

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General

Target

b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
Size

603KB
MD5

e9ce8a3a192b355783fd1d81f7bc5c0b
SHA1

1e33973df206d0fe0e65096eaadc487155c8895b
SHA256

b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0
SHA512

c4cbdacb901805289ac2bfaa5b5191409be72038fbaa2b67aca2928185d0d325b09630adf40decd55912bd9ed3e747dcd3adce79920ddd952f97a2e6d0505a35
SSDEEP

12288:bIny5DYT8mN+6wltptS+MYtWLujKct7+aRc9oI3qjRlVHAuAQCs8X:jUTN+6MZiGxB8aRct0RltJhCs8

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

Processes:

b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe

description ioc process

File created C:\Windows\system32\drivers\nethfdrv.sys b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
Executes dropped EXE 2 IoCs

Processes:

installd.exenethtsrv.exe

pid process

1652 installd.exe
1596 nethtsrv.exe

description	ioc	process
File created	C:\Windows\system32\drivers\nethfdrv.sys	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe

pid	process
1652	installd.exe
1596	nethtsrv.exe

Loads dropped DLL 8 IoCs

Processes:

b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exeinstalld.exenethtsrv.exe

pid	process
1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
1652	installd.exe
1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
1596	nethtsrv.exe
1596	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:

b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe

description	ioc	process
File created	C:\Windows\SysWOW64\hfnapi.dll	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
File created	C:\Windows\SysWOW64\hfpapi.dll	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
File created	C:\Windows\SysWOW64\installd.exe	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
File created	C:\Windows\SysWOW64\nethtsrv.exe	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe

Drops file in Program Files directory 3 IoCs

Processes:

b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe

description	ioc	process
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
File created	C:\Program Files (x86)\Common Files\Config\data.xml	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.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 27 IoCs

Processes:

b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exenet.exenet.exe

description	pid	process	target process
PID 1524 wrote to memory of 552	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	net.exe
PID 1524 wrote to memory of 552	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	net.exe
PID 1524 wrote to memory of 552	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	net.exe
PID 1524 wrote to memory of 552	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	net.exe
PID 552 wrote to memory of 880	552	net.exe	net1.exe
PID 552 wrote to memory of 880	552	net.exe	net1.exe
PID 552 wrote to memory of 880	552	net.exe	net1.exe
PID 552 wrote to memory of 880	552	net.exe	net1.exe
PID 1524 wrote to memory of 1564	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	net.exe
PID 1524 wrote to memory of 1564	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	net.exe
PID 1524 wrote to memory of 1564	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	net.exe
PID 1524 wrote to memory of 1564	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	net.exe
PID 1564 wrote to memory of 1520	1564	net.exe	net1.exe
PID 1564 wrote to memory of 1520	1564	net.exe	net1.exe
PID 1564 wrote to memory of 1520	1564	net.exe	net1.exe
PID 1564 wrote to memory of 1520	1564	net.exe	net1.exe
PID 1524 wrote to memory of 1652	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	installd.exe
PID 1524 wrote to memory of 1652	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	installd.exe
PID 1524 wrote to memory of 1652	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	installd.exe
PID 1524 wrote to memory of 1652	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	installd.exe
PID 1524 wrote to memory of 1652	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	installd.exe
PID 1524 wrote to memory of 1652	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	installd.exe
PID 1524 wrote to memory of 1652	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	installd.exe
PID 1524 wrote to memory of 1596	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	nethtsrv.exe
PID 1524 wrote to memory of 1596	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	nethtsrv.exe
PID 1524 wrote to memory of 1596	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	nethtsrv.exe
PID 1524 wrote to memory of 1596	1524	b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe	nethtsrv.exe

C:\Users\Admin\AppData\Local\Temp\b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.exe
"C:\Users\Admin\AppData\Local\Temp\b301770c31dbd0bebe33e3cd8c227af013b05815f6957bdfe851f4c0303e93f0.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:1524

C:\Windows\SysWOW64\net.exe
net stop nethttpservice
2⤵
- Suspicious use of WriteProcessMemory
PID:552

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop nethttpservice
3⤵
PID:880

C:\Windows\SysWOW64\net.exe
net stop serviceupdater
2⤵
- Suspicious use of WriteProcessMemory
PID:1564

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop serviceupdater
3⤵
PID:1520

C:\Windows\SysWOW64\installd.exe
"C:\Windows\system32\installd.exe" nethfdrv
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1652

C:\Windows\SysWOW64\nethtsrv.exe
"C:\Windows\system32\nethtsrv.exe" -nfdi
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1596

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
f14f305d24eccaed9bfc0e6c99b43177

SHA1
36bfe0f4a08cf26f365fa089d46e67c4f98ebcc2

SHA256
a9f4869e3d9c04a41690d7f9bc346dff434ab8af8a6afd0bf311fb9c7d3feccd

SHA512
c1b417bac973be0ca49ec437d765d8fbe38f1d425cde0bb046a54742d49f4b4bb121cd1b3cc41bccfecd6a76af4f4deb3f92cb34747c1bd9bf039278e7d7d57b

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

Filesize
244KB

MD5
6acd798a7fb47c1b6d369ba7638823d1

SHA1
33d749c0b7fcdc68f1d7eccdb125c081433e39c1

SHA256
98316da73666f0c9d9e26073af19f7a51e4beb1e406471e54e07ebaec1dc1dc5

SHA512
8228c773dbf99c7274e92234f97944d982b2d2d5207de2dd3e282946ab1b130b3849cc24901d2506b887219ef14a9e49f8ce94474712bf2d5fe599dbb90d9cea

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

Filesize
108KB

MD5
6490f323ad82caf91bf01b3a87f801d1

SHA1
cadf30476c81bec0059358e3409d6dfb71959c3f

SHA256
f5d6d87bd61e6c1c06deb1756cc373affb82616ef2da712730d7a1ad0e5145b6

SHA512
78ffe011c9c0554d709168eb9284c35720ca9b80dc3b360a1366a7055e43c0ebb24dfda34cb916c7e19e5bbb43544ad2cfbb34684561bed44d2aee4c911edbc9

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

Filesize
176KB

MD5
98fa761712466d6b07674a6ec0b19963

SHA1
3a133ce784757e7664e8e5f37074a783ad458ff5

SHA256
f3527868f583b936253c6e2925780272a230108f6fb5c88ef1e3fa90f2ddcb8d

SHA512
1ff97ae5419dbf9cf4e578c9ed1774b223ce265d1d3c948342437fcae8e3baf8ca497e8e07c6ea42aee8ee1327fe56e8d3aca61f838afa374186842dd1f4562c

Download Submit
\Users\Admin\AppData\Local\Temp\nse4AE8.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
\Users\Admin\AppData\Local\Temp\nse4AE8.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Users\Admin\AppData\Local\Temp\nse4AE8.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
f14f305d24eccaed9bfc0e6c99b43177

SHA1
36bfe0f4a08cf26f365fa089d46e67c4f98ebcc2

SHA256
a9f4869e3d9c04a41690d7f9bc346dff434ab8af8a6afd0bf311fb9c7d3feccd

SHA512
c1b417bac973be0ca49ec437d765d8fbe38f1d425cde0bb046a54742d49f4b4bb121cd1b3cc41bccfecd6a76af4f4deb3f92cb34747c1bd9bf039278e7d7d57b

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
f14f305d24eccaed9bfc0e6c99b43177

SHA1
36bfe0f4a08cf26f365fa089d46e67c4f98ebcc2

SHA256
a9f4869e3d9c04a41690d7f9bc346dff434ab8af8a6afd0bf311fb9c7d3feccd

SHA512
c1b417bac973be0ca49ec437d765d8fbe38f1d425cde0bb046a54742d49f4b4bb121cd1b3cc41bccfecd6a76af4f4deb3f92cb34747c1bd9bf039278e7d7d57b

Download Submit
\Windows\SysWOW64\hfpapi.dll

Filesize
244KB

MD5
6acd798a7fb47c1b6d369ba7638823d1

SHA1
33d749c0b7fcdc68f1d7eccdb125c081433e39c1

SHA256
98316da73666f0c9d9e26073af19f7a51e4beb1e406471e54e07ebaec1dc1dc5

SHA512
8228c773dbf99c7274e92234f97944d982b2d2d5207de2dd3e282946ab1b130b3849cc24901d2506b887219ef14a9e49f8ce94474712bf2d5fe599dbb90d9cea

Download Submit
\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
6490f323ad82caf91bf01b3a87f801d1

SHA1
cadf30476c81bec0059358e3409d6dfb71959c3f

SHA256
f5d6d87bd61e6c1c06deb1756cc373affb82616ef2da712730d7a1ad0e5145b6

SHA512
78ffe011c9c0554d709168eb9284c35720ca9b80dc3b360a1366a7055e43c0ebb24dfda34cb916c7e19e5bbb43544ad2cfbb34684561bed44d2aee4c911edbc9

Download Submit
\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
98fa761712466d6b07674a6ec0b19963

SHA1
3a133ce784757e7664e8e5f37074a783ad458ff5

SHA256
f3527868f583b936253c6e2925780272a230108f6fb5c88ef1e3fa90f2ddcb8d

SHA512
1ff97ae5419dbf9cf4e578c9ed1774b223ce265d1d3c948342437fcae8e3baf8ca497e8e07c6ea42aee8ee1327fe56e8d3aca61f838afa374186842dd1f4562c

Download Submit
memory/552-59-0x0000000000000000-mapping.dmp

Download
memory/880-60-0x0000000000000000-mapping.dmp

Download
memory/1520-63-0x0000000000000000-mapping.dmp

Download
memory/1524-54-0x0000000076391000-0x0000000076393000-memory.dmp

Filesize
8KB

Download
memory/1524-58-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/1524-55-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/1564-62-0x0000000000000000-mapping.dmp

Download
memory/1596-71-0x0000000000000000-mapping.dmp

Download
memory/1652-65-0x0000000000000000-mapping.dmp

Download