336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7

Analysis

max time kernel
150s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
11/10/2022, 14:37

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General

Target

336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe
Size

260KB
MD5

690e1920cf7edb4f2d66685745f2e710
SHA1

f7d730f09c6fead005001e7c34902667e7400032
SHA256

336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7
SHA512

9482f72c71516fc474e95931f8f8948a603f0b12f48a6ec6f2e0092c32caef0590ed2c527dddecd6cb3bac4c4fd84f76f4e091bb4641ef205637981f0b3e435f
SSDEEP

3072:TezGZqJUcQUPU8xnxRIGLP9pMfs7ufRJRUz7hwfiiQJV3L58MrxO:TeiZLeU8xUegfRDfsJV3KM

Score

8^/10

evasion persistence

Malware Config

Signatures

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	3848	Rundll32.exe

Executes dropped EXE 2 IoCs

pid	Process
5012	system.exe
2716	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe

Stops running service(s) 3 TTPs
evasion

Modify Existing Service
T1031

Impair Defenses
T1562

Service Stop
T1489

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	Rundll32.exe

Loads dropped DLL 3 IoCs

pid	Process
356	Rundll32.exe
3848	Rundll32.exe
3848	Rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\system = "C:\\Windows\\system32\\system.exe"	Rundll32.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\D:	Rundll32.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\system.exe	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe
File created	C:\Windows\SysWOW64\cfopifaa.dll	system.exe
File created	C:\Windows\SysWOW64\vgdrifaa.dll	system.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\AAV\CDriver.sys	Rundll32.exe

Launches sc.exe 7 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2700	sc.exe
2992	sc.exe
2164	sc.exe
1660	sc.exe
2732	sc.exe
3724	sc.exe
4604	sc.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: EnumeratesProcesses 18 IoCs

pid	Process
5012	system.exe
5012	system.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
356	Rundll32.exe
3848	Rundll32.exe
3848	Rundll32.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
644	Process not Found

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4896	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2716	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe
2716	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe
2716	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe

Suspicious use of WriteProcessMemory 63 IoCs

description	pid	Process	procid_target
PID 4896 wrote to memory of 5012	4896	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe	82
PID 4896 wrote to memory of 5012	4896	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe	82
PID 4896 wrote to memory of 5012	4896	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe	82
PID 5012 wrote to memory of 356	5012	system.exe	83
PID 5012 wrote to memory of 356	5012	system.exe	83
PID 5012 wrote to memory of 356	5012	system.exe	83
PID 356 wrote to memory of 3464	356	Rundll32.exe	84
PID 356 wrote to memory of 3464	356	Rundll32.exe	84
PID 356 wrote to memory of 3464	356	Rundll32.exe	84
PID 356 wrote to memory of 788	356	Rundll32.exe	85
PID 356 wrote to memory of 788	356	Rundll32.exe	85
PID 356 wrote to memory of 788	356	Rundll32.exe	85
PID 356 wrote to memory of 2992	356	Rundll32.exe	91
PID 356 wrote to memory of 2992	356	Rundll32.exe	91
PID 356 wrote to memory of 2992	356	Rundll32.exe	91
PID 356 wrote to memory of 2700	356	Rundll32.exe	90
PID 356 wrote to memory of 2700	356	Rundll32.exe	90
PID 356 wrote to memory of 2700	356	Rundll32.exe	90
PID 356 wrote to memory of 2164	356	Rundll32.exe	92
PID 356 wrote to memory of 2164	356	Rundll32.exe	92
PID 356 wrote to memory of 2164	356	Rundll32.exe	92
PID 356 wrote to memory of 1660	356	Rundll32.exe	93
PID 356 wrote to memory of 1660	356	Rundll32.exe	93
PID 356 wrote to memory of 1660	356	Rundll32.exe	93
PID 356 wrote to memory of 2732	356	Rundll32.exe	94
PID 356 wrote to memory of 2732	356	Rundll32.exe	94
PID 356 wrote to memory of 2732	356	Rundll32.exe	94
PID 356 wrote to memory of 3724	356	Rundll32.exe	95
PID 356 wrote to memory of 3724	356	Rundll32.exe	95
PID 356 wrote to memory of 3724	356	Rundll32.exe	95
PID 356 wrote to memory of 4896	356	Rundll32.exe	80
PID 356 wrote to memory of 4896	356	Rundll32.exe	80
PID 356 wrote to memory of 5012	356	Rundll32.exe	82
PID 356 wrote to memory of 5012	356	Rundll32.exe	82
PID 356 wrote to memory of 3464	356	Rundll32.exe	84
PID 356 wrote to memory of 3464	356	Rundll32.exe	84
PID 356 wrote to memory of 788	356	Rundll32.exe	85
PID 356 wrote to memory of 788	356	Rundll32.exe	85
PID 356 wrote to memory of 2992	356	Rundll32.exe	91
PID 356 wrote to memory of 2992	356	Rundll32.exe	91
PID 356 wrote to memory of 2700	356	Rundll32.exe	90
PID 356 wrote to memory of 2700	356	Rundll32.exe	90
PID 356 wrote to memory of 2164	356	Rundll32.exe	92
PID 356 wrote to memory of 2164	356	Rundll32.exe	92
PID 356 wrote to memory of 1660	356	Rundll32.exe	93
PID 356 wrote to memory of 1660	356	Rundll32.exe	93
PID 356 wrote to memory of 2732	356	Rundll32.exe	94
PID 356 wrote to memory of 2732	356	Rundll32.exe	94
PID 3464 wrote to memory of 1920	3464	net.exe	100
PID 3464 wrote to memory of 1920	3464	net.exe	100
PID 3464 wrote to memory of 1920	3464	net.exe	100
PID 788 wrote to memory of 2268	788	net.exe	101
PID 788 wrote to memory of 2268	788	net.exe	101
PID 788 wrote to memory of 2268	788	net.exe	101
PID 356 wrote to memory of 4604	356	Rundll32.exe	102
PID 356 wrote to memory of 4604	356	Rundll32.exe	102
PID 356 wrote to memory of 4604	356	Rundll32.exe	102
PID 5012 wrote to memory of 3848	5012	system.exe	104
PID 5012 wrote to memory of 3848	5012	system.exe	104
PID 5012 wrote to memory of 3848	5012	system.exe	104
PID 4896 wrote to memory of 2716	4896	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe	112
PID 4896 wrote to memory of 2716	4896	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe	112
PID 4896 wrote to memory of 2716	4896	336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe	112

C:\Users\Admin\AppData\Local\Temp\336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe
"C:\Users\Admin\AppData\Local\Temp\336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:4896
- C:\Windows\SysWOW64\system.exe
  C:\Windows\system32\system.exe
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5012
- - C:\Windows\SysWOW64\Rundll32.exe
    Rundll32 C:\Windows\system32\cfopifaa.dll Exxcute
    3⤵
    - Checks computer location settings
    - Loads dropped DLL
    - Drops file in Program Files directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:356
  - - C:\Windows\SysWOW64\net.exe
      net stop WinDefend
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3464
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 stop WinDefend
        5⤵
        
        PID:1920
  - - C:\Windows\SysWOW64\net.exe
      net stop MpsSvc
      4⤵
      Suspicious use of WriteProcessMemory
      PID:788
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 stop MpsSvc
        5⤵
        
        PID:2268
  - - C:\Windows\SysWOW64\sc.exe
      sc config MpsSvc start= disabled
      4⤵
      Launches sc.exe
      PID:2700
  - - C:\Windows\SysWOW64\sc.exe
      sc config WinDefend start= disabled
      4⤵
      Launches sc.exe
      PID:2992
  - - C:\Windows\SysWOW64\sc.exe
      sc stop ZhuDongFangYu
      4⤵
      Launches sc.exe
      PID:2164
  - - C:\Windows\SysWOW64\sc.exe
      sc delete ZhuDongFangYu
      4⤵
      Launches sc.exe
      PID:1660
  - - C:\Windows\SysWOW64\sc.exe
      sc stop 360rp
      4⤵
      Launches sc.exe
      PID:2732
  - - C:\Windows\SysWOW64\sc.exe
      sc delete 360rp
      4⤵
      Launches sc.exe
      PID:3724
  - - C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" stop PolicyAgent
      4⤵
      Launches sc.exe
      PID:4604
- - C:\Windows\SysWOW64\Rundll32.exe
    Rundll32 C:\Windows\system32\vgdrifaa.dll Exucute
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    - Adds Run key to start application
    - Enumerates connected drives
    - Suspicious behavior: EnumeratesProcesses
    PID:3848
- C:\Users\Admin\AppData\Local\Temp\336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe
  C:\Users\Admin\AppData\Local\Temp\336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2716

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Impair Defenses

T1562

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\336b1661b66a240f252fdd6b53a43be92793e834945ac9e9eca475ea86b43ff7.exe

Filesize
108KB

MD5
8e5b467a5679e89d8e386713fee20bf4

SHA1
1febaaa60c3019c47ff035f8319469f747aac2cf

SHA256
64dc8c4d9f640b91b08d604c615caeac2ddd78c80190ce154f1cc884f65b2637

SHA512
b35ca07e473d561b1a09c0a128a5840763f6a538293cb6cde99c6ce8495bbdaa2a2e6cb70b458a10012350a792f0889ac8b2ab7704514d2a7379bd6ca0b5a368

Download Submit
C:\Users\Admin\AppData\Local\Temp\CB73.tmp

Filesize
4.3MB

MD5
6c7cdd25c2cb0073306eb22aebfc663f

SHA1
a1eba8ab49272b9852fe6a543677e8af36271248

SHA256
58280e3572333f97a7cf9f33e8d31dc26a98b6535965ebd0bde82249fc9bf705

SHA512
17344e07b9e9b2cd6ae4237d7f310732462f9cbb8656883607d7a1a4090e869265f92a6da1718dee50b1375b91583de60c6bd9e7e8db6b6e45e33f4b894365d6

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

Filesize
76KB

MD5
eee47dc87eac9004c88a14ecb74f68b7

SHA1
fb655609e5325aedbc32970e07a9ff1def649495

SHA256
1842b912afece361d3a2f62ca742e5940d312f431773f5701d534044b8143c9e

SHA512
e9b58771260bea011c69bbb22fafad18c6c858aad7e23f8565fdccefa054954236f21e25570c53b7c2ca1016da580d0713a929405700a23a8eaefeceee35c22c

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

Filesize
76KB

MD5
eee47dc87eac9004c88a14ecb74f68b7

SHA1
fb655609e5325aedbc32970e07a9ff1def649495

SHA256
1842b912afece361d3a2f62ca742e5940d312f431773f5701d534044b8143c9e

SHA512
e9b58771260bea011c69bbb22fafad18c6c858aad7e23f8565fdccefa054954236f21e25570c53b7c2ca1016da580d0713a929405700a23a8eaefeceee35c22c

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

Filesize
141KB

MD5
d38207a5dd73ffd8c9ffe21fcd3f2a53

SHA1
e5e792ef21a75423318e8d503ed88ba7bbfbcb45

SHA256
b51a122cf9228b7a017331146d05b1a50685fbc604cfd608fcbdbe89622387c3

SHA512
730c66e2490692f991ce80ff4df4126e40539034d938df5a9fdf47807579a06b598fce46e8c2982dce583f7a55e077da74dc1a1a94cac154c13678c20710b7ba

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

Filesize
141KB

MD5
d38207a5dd73ffd8c9ffe21fcd3f2a53

SHA1
e5e792ef21a75423318e8d503ed88ba7bbfbcb45

SHA256
b51a122cf9228b7a017331146d05b1a50685fbc604cfd608fcbdbe89622387c3

SHA512
730c66e2490692f991ce80ff4df4126e40539034d938df5a9fdf47807579a06b598fce46e8c2982dce583f7a55e077da74dc1a1a94cac154c13678c20710b7ba

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

Filesize
21KB

MD5
2642b0beb97e9113be39215406b6d40b

SHA1
cbcc7ddce2eb844dfc47876e566fda122d062a76

SHA256
83e8298f58ddb4cef0580a3bb70fa023c82143e0af63ef6a275e19b3ef93b282

SHA512
66659311a109dea93abfa2f4e9287d011e686774d6e30e24991fa88a0ec6a44304f46ed99680a19752a437ea2d83519e3d2c0c5bf676fae0c4af6e285c955b36

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

Filesize
21KB

MD5
2642b0beb97e9113be39215406b6d40b

SHA1
cbcc7ddce2eb844dfc47876e566fda122d062a76

SHA256
83e8298f58ddb4cef0580a3bb70fa023c82143e0af63ef6a275e19b3ef93b282

SHA512
66659311a109dea93abfa2f4e9287d011e686774d6e30e24991fa88a0ec6a44304f46ed99680a19752a437ea2d83519e3d2c0c5bf676fae0c4af6e285c955b36

Download Submit
memory/4896-132-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download