8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3

Analysis

max time kernel
244s
max time network
335s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
24/11/2022, 05:38

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General

Target

8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
Size

603KB
MD5

f28953625f1010302c29bd84106d8a04
SHA1

6e309986ae0aa6016ffd8d582e286a52ef3a4407
SHA256

8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3
SHA512

9cead0cebc0574040beded7c1751c59c4d07163a7b9fab4ca8be5583ebf1d6d4918977e2142de4c5d9a987d08b63d252f22e5295caa1e78f4948cf074f086460
SSDEEP

12288:UIny5DYTMIqrpTuivl6DlCxr18PmJgKBLRrUopV:SUTMVNuDDlEiPm7BL1J

Score

8^/10

discovery

Malware Config

Signatures

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\drivers\nethfdrv.sys	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe

Executes dropped EXE 3 IoCs

pid	Process
1676	installd.exe
1900	nethtsrv.exe
1876	netupdsrv.exe

Loads dropped DLL 9 IoCs

pid	Process
852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
1676	installd.exe
852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
1900	nethtsrv.exe
1900	nethtsrv.exe
852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.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

description	ioc	Process
File created	C:\Windows\SysWOW64\installd.exe	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
File created	C:\Windows\SysWOW64\nethtsrv.exe	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
File created	C:\Windows\SysWOW64\netupdsrv.exe	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
File created	C:\Windows\SysWOW64\hfnapi.dll	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
File created	C:\Windows\SysWOW64\hfpapi.dll	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\Config\ver.xml	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
File created	C:\Program Files (x86)\Common Files\config\uninstinethnfd.exe	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
File created	C:\Program Files (x86)\Common Files\Config\data.xml	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.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

pid	Process
460	Process not Found

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 852 wrote to memory of 1768	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	28
PID 852 wrote to memory of 1768	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	28
PID 852 wrote to memory of 1768	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	28
PID 852 wrote to memory of 1768	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	28
PID 1768 wrote to memory of 1584	1768	net.exe	30
PID 1768 wrote to memory of 1584	1768	net.exe	30
PID 1768 wrote to memory of 1584	1768	net.exe	30
PID 1768 wrote to memory of 1584	1768	net.exe	30
PID 852 wrote to memory of 576	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	31
PID 852 wrote to memory of 576	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	31
PID 852 wrote to memory of 576	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	31
PID 852 wrote to memory of 576	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	31
PID 576 wrote to memory of 1532	576	net.exe	33
PID 576 wrote to memory of 1532	576	net.exe	33
PID 576 wrote to memory of 1532	576	net.exe	33
PID 576 wrote to memory of 1532	576	net.exe	33
PID 852 wrote to memory of 1676	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	34
PID 852 wrote to memory of 1676	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	34
PID 852 wrote to memory of 1676	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	34
PID 852 wrote to memory of 1676	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	34
PID 852 wrote to memory of 1676	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	34
PID 852 wrote to memory of 1676	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	34
PID 852 wrote to memory of 1676	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	34
PID 852 wrote to memory of 1900	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	36
PID 852 wrote to memory of 1900	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	36
PID 852 wrote to memory of 1900	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	36
PID 852 wrote to memory of 1900	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	36
PID 852 wrote to memory of 1876	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	39
PID 852 wrote to memory of 1876	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	39
PID 852 wrote to memory of 1876	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	39
PID 852 wrote to memory of 1876	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	39
PID 852 wrote to memory of 1876	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	39
PID 852 wrote to memory of 1876	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	39
PID 852 wrote to memory of 1876	852	8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe	39

C:\Users\Admin\AppData\Local\Temp\8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.exe
"C:\Users\Admin\AppData\Local\Temp\8a2cb3ef6ff0a2b748dd6eb44a79a819fa74105e583952564b1e92c43a9a47e3.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:852
- C:\Windows\SysWOW64\net.exe
  net stop nethttpservice
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop nethttpservice
    3⤵
    PID:1584
- C:\Windows\SysWOW64\net.exe
  net stop serviceupdater
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:576
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop serviceupdater
    3⤵
    PID:1532
- C:\Windows\SysWOW64\installd.exe
  "C:\Windows\system32\installd.exe" nethfdrv
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:1676
- C:\Windows\SysWOW64\nethtsrv.exe
  "C:\Windows\system32\nethtsrv.exe" -nfdi
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:1900
- C:\Windows\SysWOW64\netupdsrv.exe
  "C:\Windows\system32\netupdsrv.exe" -nfdi
  2⤵
  - Executes dropped EXE
  PID:1876

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
a1017924b05c1cf49cce9d130235a8f3

SHA1
ff5de0b9f29436decd9c74dfc4acfa958c3478f2

SHA256
ffeeaaafbc328ae243f7397cf31bab89946e19b4c74dd6fc7962bff7304fc354

SHA512
fe8c0b3100a321d1b982245f88dda336fad8c4ac37d122c2880fb8682051fb17bfdec2f8e613a547c7491192a2820c9ce8cbafe6d4ba5089074a8832ee92163e

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

Filesize
244KB

MD5
c6323cf4c1e1f1fb3597ef294100c3c1

SHA1
de4f819abe6efba835621d7b6d9c1ecd6641a105

SHA256
496dab554c268a3f37e51cb51ec003ccf81c1b74cf9f8237762efc4a1bfb11ff

SHA512
23fea86db806ea0d2f437295fd5929a63931b54d01b56de969749315850f29fe26b64630f56628d68b0323ab4d9fdf1a72eeccb4c0d7a5d71c38987ce56da9a4

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

Filesize
108KB

MD5
d949064feb8875355864b60b488c3dc0

SHA1
1c9c339e3a1cbb15ca5f0d50c9cd4d8306a648fe

SHA256
322e486ebda73c758710c766e2dce204af42eed98b2f3299edf4c12bc63fc842

SHA512
51c5332d24c7b348a12ab4590ad7768baa1804c0852c8d0d84aebb903d6d0d5836a0e28c202a43771267aa1b82c5bfe007968d2d7d3be6869a3eb18b5d2f9ac9

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

Filesize
176KB

MD5
c31a26f9271298bdeedcef92070d3f33

SHA1
364a3d4e1956bcdfa4257f7ce015c123fa09779a

SHA256
20488d4589b20b9897d354d0573b279021c004f6f4688c6372e492ded8ae6cbd

SHA512
acce5e9c39c67a35a172d7ec901c78f2cf9eb9de4e8a5fa0c97767093b1ca47c624819f7a517574fbc0207329f18d75160a31aeffdccaa42183b995688c3d095

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

Filesize
158KB

MD5
90ad4d1e1f81a8f4cea82e58f0386b0e

SHA1
e089c111bb2c88e681b4dd9f283199f2cbd8658c

SHA256
b1f14c9ee5f650c3530b9129ff7bc5d29fb7b1b0b25bf14e3003993538deff39

SHA512
760c87637b7e481ba512ae4286372633de7ee795282554f6a954f81ebcd2d38d0a03bbd8d33b9234a6372d7b4102f109cc4a8a9b0f550dbd074fcb410a46d2cb

Download Submit
\Users\Admin\AppData\Local\Temp\nsk6442.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit
\Users\Admin\AppData\Local\Temp\nsk6442.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Users\Admin\AppData\Local\Temp\nsk6442.tmp\nsExec.dll

Filesize
6KB

MD5
acc2b699edfea5bf5aae45aba3a41e96

SHA1
d2accf4d494e43ceb2cff69abe4dd17147d29cc2

SHA256
168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

SHA512
e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
a1017924b05c1cf49cce9d130235a8f3

SHA1
ff5de0b9f29436decd9c74dfc4acfa958c3478f2

SHA256
ffeeaaafbc328ae243f7397cf31bab89946e19b4c74dd6fc7962bff7304fc354

SHA512
fe8c0b3100a321d1b982245f88dda336fad8c4ac37d122c2880fb8682051fb17bfdec2f8e613a547c7491192a2820c9ce8cbafe6d4ba5089074a8832ee92163e

Download Submit
\Windows\SysWOW64\hfnapi.dll

Filesize
106KB

MD5
a1017924b05c1cf49cce9d130235a8f3

SHA1
ff5de0b9f29436decd9c74dfc4acfa958c3478f2

SHA256
ffeeaaafbc328ae243f7397cf31bab89946e19b4c74dd6fc7962bff7304fc354

SHA512
fe8c0b3100a321d1b982245f88dda336fad8c4ac37d122c2880fb8682051fb17bfdec2f8e613a547c7491192a2820c9ce8cbafe6d4ba5089074a8832ee92163e

Download Submit
\Windows\SysWOW64\hfpapi.dll

Filesize
244KB

MD5
c6323cf4c1e1f1fb3597ef294100c3c1

SHA1
de4f819abe6efba835621d7b6d9c1ecd6641a105

SHA256
496dab554c268a3f37e51cb51ec003ccf81c1b74cf9f8237762efc4a1bfb11ff

SHA512
23fea86db806ea0d2f437295fd5929a63931b54d01b56de969749315850f29fe26b64630f56628d68b0323ab4d9fdf1a72eeccb4c0d7a5d71c38987ce56da9a4

Download Submit
\Windows\SysWOW64\installd.exe

Filesize
108KB

MD5
d949064feb8875355864b60b488c3dc0

SHA1
1c9c339e3a1cbb15ca5f0d50c9cd4d8306a648fe

SHA256
322e486ebda73c758710c766e2dce204af42eed98b2f3299edf4c12bc63fc842

SHA512
51c5332d24c7b348a12ab4590ad7768baa1804c0852c8d0d84aebb903d6d0d5836a0e28c202a43771267aa1b82c5bfe007968d2d7d3be6869a3eb18b5d2f9ac9

Download Submit
\Windows\SysWOW64\nethtsrv.exe

Filesize
176KB

MD5
c31a26f9271298bdeedcef92070d3f33

SHA1
364a3d4e1956bcdfa4257f7ce015c123fa09779a

SHA256
20488d4589b20b9897d354d0573b279021c004f6f4688c6372e492ded8ae6cbd

SHA512
acce5e9c39c67a35a172d7ec901c78f2cf9eb9de4e8a5fa0c97767093b1ca47c624819f7a517574fbc0207329f18d75160a31aeffdccaa42183b995688c3d095

Download Submit
\Windows\SysWOW64\netupdsrv.exe

Filesize
158KB

MD5
90ad4d1e1f81a8f4cea82e58f0386b0e

SHA1
e089c111bb2c88e681b4dd9f283199f2cbd8658c

SHA256
b1f14c9ee5f650c3530b9129ff7bc5d29fb7b1b0b25bf14e3003993538deff39

SHA512
760c87637b7e481ba512ae4286372633de7ee795282554f6a954f81ebcd2d38d0a03bbd8d33b9234a6372d7b4102f109cc4a8a9b0f550dbd074fcb410a46d2cb

Download Submit
memory/852-69-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/852-56-0x0000000000360000-0x00000000007BE000-memory.dmp

Filesize
4.4MB

Download
memory/852-54-0x0000000075E01000-0x0000000075E03000-memory.dmp

Filesize
8KB

Download