c33ecac87bf07fc75b6768b76622daac389e05ef718c457e0393238d646bb130

Analysis

max time kernel
79s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
09-03-2023 02:13

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General

Target

b5e1e946ebad560b876703e9675ca326.exe
Size

308KB
MD5

b5e1e946ebad560b876703e9675ca326
SHA1

c0e2e24a911a4d8e9cbc5a483ef8876fbabfa772
SHA256

c33ecac87bf07fc75b6768b76622daac389e05ef718c457e0393238d646bb130
SHA512

8ee9e9af2731eb83af3f17aa19b9a74547429f026882fb6d592d74d97ed958f990f46c5be5371e06360503672e9f8ca00ccf9d64ed59d11475c86a6f35ac1ff5
SSDEEP

6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1gEP3:i814Xn0Ti8tbJyIQdjrfzWEP3

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 512 2208 rundll32.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	512	2208	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:

b5e1e946ebad560b876703e9675ca326.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	b5e1e946ebad560b876703e9675ca326.exe

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

4340 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

4416 4340 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 14 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

pid	process
4340	rundll32.exe

pid	pid_target	process	target process
4416	4340	WerFault.exe	rundll32.exe

description	flow	ioc
HTTP User-Agent header	14	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

b5e1e946ebad560b876703e9675ca326.exeb5e1e946ebad560b876703e9675ca326.exe

pid	process
3268	b5e1e946ebad560b876703e9675ca326.exe
3268	b5e1e946ebad560b876703e9675ca326.exe
3612	b5e1e946ebad560b876703e9675ca326.exe
3612	b5e1e946ebad560b876703e9675ca326.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

b5e1e946ebad560b876703e9675ca326.exerundll32.exe

description	pid	process	target process
PID 3268 wrote to memory of 3612	3268	b5e1e946ebad560b876703e9675ca326.exe	b5e1e946ebad560b876703e9675ca326.exe
PID 3268 wrote to memory of 3612	3268	b5e1e946ebad560b876703e9675ca326.exe	b5e1e946ebad560b876703e9675ca326.exe
PID 3268 wrote to memory of 3612	3268	b5e1e946ebad560b876703e9675ca326.exe	b5e1e946ebad560b876703e9675ca326.exe
PID 512 wrote to memory of 4340	512	rundll32.exe	rundll32.exe
PID 512 wrote to memory of 4340	512	rundll32.exe	rundll32.exe
PID 512 wrote to memory of 4340	512	rundll32.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\b5e1e946ebad560b876703e9675ca326.exe
"C:\Users\Admin\AppData\Local\Temp\b5e1e946ebad560b876703e9675ca326.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3268

C:\Users\Admin\AppData\Local\Temp\b5e1e946ebad560b876703e9675ca326.exe
"C:\Users\Admin\AppData\Local\Temp\b5e1e946ebad560b876703e9675ca326.exe" -h
2⤵
- Suspicious use of SetWindowsHookEx
PID:3612

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:512

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
2⤵
- Loads dropped DLL
PID:4340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4340 -s 600
3⤵
- Program crash
PID:4416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4340 -ip 4340
1⤵
PID:4532

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

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Downloads

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

MD5
fd90f85bea1392578bc903144ace2ace

SHA1
0eabae72ab684584ca78dce7680fb997d7aba07b

SHA256
32e932155cf3f208d90aa0a058a87cf072e54e38e8c5c22c045411bac0bf936d

SHA512
6de4887f177d71e21b89c9d431244044b50f3bb994939690413e77775dcc17b06a4dc11c7f5b1f6f382459e12bc9800fbba81fc54f41a4dbe77e5b52c90c4151

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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