d75bdc11107b27e7602f31a93896dbc589dbd313cbb5e76a00d695208218e92a

Analysis

max time kernel
101s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
07-03-2023 14:11

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General

Target

file.exe
Size

308KB
MD5

75de993ffc429a40b338f5ab5f42f51d
SHA1

d6ccae60897a050b2aa9ecbdf553bc8da116be7e
SHA256

d75bdc11107b27e7602f31a93896dbc589dbd313cbb5e76a00d695208218e92a
SHA512

5c249827b118c7a26776110405f4c83540c1fe01d394860320d9a1e2010248cb9cd4958dc9246589d845d61ed47b523cc931e32a269e47c5ba734601963bf7ec
SSDEEP

6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1iEP3:i814Xn0Ti8tbJyIQdjrfzMEP3

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 3736 1876 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-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation file.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

4732 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

2112 4732 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 12 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

file.exefile.exe

pid process

4024 file.exe
4024 file.exe
3148 file.exe
3148 file.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3736	1876	rundll32.exe

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

pid	process
4732	rundll32.exe

pid	pid_target	process	target process
2112	4732	WerFault.exe	rundll32.exe

description	flow	ioc
HTTP User-Agent header	12	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

pid	process
4024	file.exe
4024	file.exe
3148	file.exe
3148	file.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

file.exerundll32.exe

description	pid	process	target process
PID 4024 wrote to memory of 3148	4024	file.exe	file.exe
PID 4024 wrote to memory of 3148	4024	file.exe	file.exe
PID 4024 wrote to memory of 3148	4024	file.exe	file.exe
PID 3736 wrote to memory of 4732	3736	rundll32.exe	rundll32.exe
PID 3736 wrote to memory of 4732	3736	rundll32.exe	rundll32.exe
PID 3736 wrote to memory of 4732	3736	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:4024

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe" -h
2⤵
- Suspicious use of SetWindowsHookEx
PID:3148

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:3736

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
2⤵
- Loads dropped DLL
PID:4732

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4732 -s 600
3⤵
- Program crash
PID:2112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4732 -ip 4732
1⤵
PID:4108

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
45ceed48afd68359f317952e8845ea02

SHA1
0149982c8c5a90616c3392974b1a543eb2b4e894

SHA256
ba07f9487a10ed278772d9571d6e867f53338029a3c4580eed2e08d8f5a8f9bd

SHA512
c41645620e26ece7bf044c7a7a8d43383e87a07baae20596d7e01a609d403396fc1993647724185b066e48d9b7f7bddca8913c838dfa56916de7dbd27b9bd4cf

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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