b9a81253d85a5da410ec8cf345c2444ec09739e5c9842e4031195209bacbf8ab

Analysis

max time kernel
92s
max time network
94s
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 16:35

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General

Target

file.exe
Size

312KB
MD5

a64c4c4083e817d1b75536c30dd0ce5e
SHA1

a4667b3ae9b83bc12f9d53543c41783b343afac3
SHA256

b9a81253d85a5da410ec8cf345c2444ec09739e5c9842e4031195209bacbf8ab
SHA512

fa39341ae0d245459174707c4dfd5fa4830e26eb7b58a1c81395977a27536ef1813bc42c2536556901a8a9cb238bd88b081df602f4d2a5242c95320d55d80d8f
SSDEEP

6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQs8EPn:6aeqeO0UQB8KFHqAY8EPn

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 3728 4908 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:

file.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation file.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

5008 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

2416 5008 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)
Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

file.exefile.exe

pid process

2536 file.exe
2536 file.exe
1992 file.exe
1992 file.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3728	4908	rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	file.exe

pid	process
5008	rundll32.exe

pid	pid_target	process	target process
2416	5008	WerFault.exe	rundll32.exe

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

pid	process
2536	file.exe
2536	file.exe
1992	file.exe
1992	file.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

file.exerundll32.exe

description	pid	process	target process
PID 2536 wrote to memory of 1992	2536	file.exe	file.exe
PID 2536 wrote to memory of 1992	2536	file.exe	file.exe
PID 2536 wrote to memory of 1992	2536	file.exe	file.exe
PID 3728 wrote to memory of 5008	3728	rundll32.exe	rundll32.exe
PID 3728 wrote to memory of 5008	3728	rundll32.exe	rundll32.exe
PID 3728 wrote to memory of 5008	3728	rundll32.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2536

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe" -h
2⤵
- Suspicious use of SetWindowsHookEx
PID:1992

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:3728

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
2⤵
- Loads dropped DLL
PID:5008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5008 -s 604
3⤵
- Program crash
PID:2416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5008 -ip 5008
1⤵
PID:4948

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:\Users\Admin\AppData\Local\Temp\db.dat

Filesize
557KB

MD5
f1f63fb8caa7c9447692fe4dc35dce65

SHA1
ea4816ff6db602728e97c990c4e71822e262e87c

SHA256
67e6fcfa88fcfe4fa1c87671567bd8bcf3cb2f79a5cb88173552b2222bbd27d2

SHA512
e5984aa82fd76ebe9804678b722ca416c9a890bab10d20a0f0e2a9b348f86ac3da4c210ddb5bd09ecf489ac90cc9f8d1939a489a242fe436a3af84c09743aed5

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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