9d6f720f4d9bd455371b863ce479c490ebb437ff53c1635fe7befd5eff30af10

Analysis

max time kernel
100s
max time network
102s
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

a3b3e417dc721aaa4fdcaa8f65eef81a.exe
Size

312KB
MD5

a3b3e417dc721aaa4fdcaa8f65eef81a
SHA1

21ea098b035b5fd93037054f59ee506aa66d030c
SHA256

9d6f720f4d9bd455371b863ce479c490ebb437ff53c1635fe7befd5eff30af10
SHA512

10b658b0b440c01bf0d1fe49c5092b82a59ba8c4ebd214b4c7b3fae8f3d8c4d67598154bf53e13fbf80174bf7411b4f12e044832967c528c5f917efe5b6f2585
SSDEEP

6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQshEPn:6aeqeO0UQB8KFHqAYhEPn

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 516 924 rundll32.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	516	924	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:

a3b3e417dc721aaa4fdcaa8f65eef81a.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	a3b3e417dc721aaa4fdcaa8f65eef81a.exe

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1776 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

5104 1776 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
1776	rundll32.exe

pid	pid_target	process	target process
5104	1776	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:

a3b3e417dc721aaa4fdcaa8f65eef81a.exea3b3e417dc721aaa4fdcaa8f65eef81a.exe

pid	process
4120	a3b3e417dc721aaa4fdcaa8f65eef81a.exe
4120	a3b3e417dc721aaa4fdcaa8f65eef81a.exe
3264	a3b3e417dc721aaa4fdcaa8f65eef81a.exe
3264	a3b3e417dc721aaa4fdcaa8f65eef81a.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

a3b3e417dc721aaa4fdcaa8f65eef81a.exerundll32.exe

description	pid	process	target process
PID 4120 wrote to memory of 3264	4120	a3b3e417dc721aaa4fdcaa8f65eef81a.exe	a3b3e417dc721aaa4fdcaa8f65eef81a.exe
PID 4120 wrote to memory of 3264	4120	a3b3e417dc721aaa4fdcaa8f65eef81a.exe	a3b3e417dc721aaa4fdcaa8f65eef81a.exe
PID 4120 wrote to memory of 3264	4120	a3b3e417dc721aaa4fdcaa8f65eef81a.exe	a3b3e417dc721aaa4fdcaa8f65eef81a.exe
PID 516 wrote to memory of 1776	516	rundll32.exe	rundll32.exe
PID 516 wrote to memory of 1776	516	rundll32.exe	rundll32.exe
PID 516 wrote to memory of 1776	516	rundll32.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\a3b3e417dc721aaa4fdcaa8f65eef81a.exe
"C:\Users\Admin\AppData\Local\Temp\a3b3e417dc721aaa4fdcaa8f65eef81a.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4120

C:\Users\Admin\AppData\Local\Temp\a3b3e417dc721aaa4fdcaa8f65eef81a.exe
"C:\Users\Admin\AppData\Local\Temp\a3b3e417dc721aaa4fdcaa8f65eef81a.exe" -h
2⤵
- Suspicious use of SetWindowsHookEx
PID:3264

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:516

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
2⤵
- Loads dropped DLL
PID:1776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1776 -s 572
3⤵
- Program crash
PID:5104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1776 -ip 1776
1⤵
PID:1328

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
1bd81dc243577b6a0c7f93f6bd9ae40b

SHA1
9d4e908b53e52c5216ea7746d2e1b33abea9bc1c

SHA256
3b667512e2dc899bc4e0d92628a981b4487b9423c6ae3804893a30c67a2de21c

SHA512
e7e647733b88c78b8bb6c1951780b2627e2b0b66dc2b29d257f2925d837936bd12eaa56b43c7d59ec663e81fa31ec50f4767de8ab1441c645c0890aec79a8d10

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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