9a8d4f6c8f24d96d32ef8974ba8c96cc02d4fca7d46c3d1edf7e70d6027805f5

Analysis

max time kernel
66s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
22-02-2023 11:00

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General

Target

8c4b7faad766aea25bebe85e8f15f705.exe
Size

312KB
MD5

8c4b7faad766aea25bebe85e8f15f705
SHA1

7e3588daf272343e6404195355dca4fb45b21bca
SHA256

9a8d4f6c8f24d96d32ef8974ba8c96cc02d4fca7d46c3d1edf7e70d6027805f5
SHA512

c0b3a92cbbae4c696039eb8dd543c8fd705ddfcbc9885070eac7ae31f3948cad1be3553fd1a8b222b50810d7dc4ca785ae636b6a979f5ab3395b34290b03abfc
SSDEEP

6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQswEPn:6aeqeO0UQB8KFHqAYwEPn

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exe

description pid pid_target process target process

Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1352 536 rundll32.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1352	536	rundll32.exe

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

Processes:

8c4b7faad766aea25bebe85e8f15f705.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	8c4b7faad766aea25bebe85e8f15f705.exe

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

4416 rundll32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3564 4416 WerFault.exe rundll32.exe
Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.

Processes:

description flow ioc

HTTP User-Agent header 2 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

pid	process
4416	rundll32.exe

pid	pid_target	process	target process
3564	4416	WerFault.exe	rundll32.exe

description	flow	ioc
HTTP User-Agent header	2	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

8c4b7faad766aea25bebe85e8f15f705.exe8c4b7faad766aea25bebe85e8f15f705.exe

pid	process
4616	8c4b7faad766aea25bebe85e8f15f705.exe
4616	8c4b7faad766aea25bebe85e8f15f705.exe
2008	8c4b7faad766aea25bebe85e8f15f705.exe
2008	8c4b7faad766aea25bebe85e8f15f705.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

8c4b7faad766aea25bebe85e8f15f705.exerundll32.exe

description	pid	process	target process
PID 4616 wrote to memory of 2008	4616	8c4b7faad766aea25bebe85e8f15f705.exe	8c4b7faad766aea25bebe85e8f15f705.exe
PID 4616 wrote to memory of 2008	4616	8c4b7faad766aea25bebe85e8f15f705.exe	8c4b7faad766aea25bebe85e8f15f705.exe
PID 4616 wrote to memory of 2008	4616	8c4b7faad766aea25bebe85e8f15f705.exe	8c4b7faad766aea25bebe85e8f15f705.exe
PID 1352 wrote to memory of 4416	1352	rundll32.exe	rundll32.exe
PID 1352 wrote to memory of 4416	1352	rundll32.exe	rundll32.exe
PID 1352 wrote to memory of 4416	1352	rundll32.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\8c4b7faad766aea25bebe85e8f15f705.exe
"C:\Users\Admin\AppData\Local\Temp\8c4b7faad766aea25bebe85e8f15f705.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4616

C:\Users\Admin\AppData\Local\Temp\8c4b7faad766aea25bebe85e8f15f705.exe
"C:\Users\Admin\AppData\Local\Temp\8c4b7faad766aea25bebe85e8f15f705.exe" -h
2⤵
- Suspicious use of SetWindowsHookEx
PID:2008

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:1352

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
2⤵
- Loads dropped DLL
PID:4416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4416 -s 572
3⤵
- Program crash
PID:3564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4416 -ip 4416
1⤵
PID:2188

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\db.dat
Filesize
557KB

MD5
f7e8df8e09b2ece08e769ba285f7bb92

SHA1
52157d2b18f5e9f1d932652fb4a414b5ceadfc1b

SHA256
20fb5f8100fa609f83b3af630e89091135f887d88007885aab16f89a2b38e7dc

SHA512
d21490bd29490a62250b97dd14ff951f8cadb65429010b0057c31371f01487f7439f9b6327b3f214a2aaa83c4c8c5a964e76fc19936f5403f2258b777b2a29b5

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C:\Users\Admin\AppData\Local\Temp\db.dll
Filesize
52KB

MD5
1b20e998d058e813dfc515867d31124f

SHA1
c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

SHA256
24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

SHA512
79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

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C:\Users\Admin\AppData\Local\Temp\db.dll
Filesize
52KB

MD5
1b20e998d058e813dfc515867d31124f

SHA1
c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

SHA256
24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

SHA512
79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

Download Submit