1868f0807fb9ad9be1629bc214b755ede9937036622ef31ae877617aba840080

Analysis

max time kernel
100s
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
09/03/2023, 01:30

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General

Target

a1c5f268d670ba3a4440647bdeaa3e20.exe
Size

308KB
MD5

a1c5f268d670ba3a4440647bdeaa3e20
SHA1

e79227b1a17dc76882f9eef1d65eb7588cce21a4
SHA256

1868f0807fb9ad9be1629bc214b755ede9937036622ef31ae877617aba840080
SHA512

7d43dd7edf54e5853eeea1636e3d05b7880f420d3cfdefc133e53287bb6814ac17921603922ac6c469540564a04d7a6504da5e79d711faff4148b0e7f68c2527
SSDEEP

6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1zEP3:i814Xn0Ti8tbJyIQdjrfzBEP3

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.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1524	4508	rundll32.exe	55

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	a1c5f268d670ba3a4440647bdeaa3e20.exe

Loads dropped DLL 1 IoCs

pid	Process
4444	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

pid	pid_target	Process	procid_target
388	4444	WerFault.exe	88

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

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

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
3796	a1c5f268d670ba3a4440647bdeaa3e20.exe
3796	a1c5f268d670ba3a4440647bdeaa3e20.exe
4668	a1c5f268d670ba3a4440647bdeaa3e20.exe
4668	a1c5f268d670ba3a4440647bdeaa3e20.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3796 wrote to memory of 4668	3796	a1c5f268d670ba3a4440647bdeaa3e20.exe	86
PID 3796 wrote to memory of 4668	3796	a1c5f268d670ba3a4440647bdeaa3e20.exe	86
PID 3796 wrote to memory of 4668	3796	a1c5f268d670ba3a4440647bdeaa3e20.exe	86
PID 1524 wrote to memory of 4444	1524	rundll32.exe	88
PID 1524 wrote to memory of 4444	1524	rundll32.exe	88
PID 1524 wrote to memory of 4444	1524	rundll32.exe	88

C:\Users\Admin\AppData\Local\Temp\a1c5f268d670ba3a4440647bdeaa3e20.exe
"C:\Users\Admin\AppData\Local\Temp\a1c5f268d670ba3a4440647bdeaa3e20.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3796
- C:\Users\Admin\AppData\Local\Temp\a1c5f268d670ba3a4440647bdeaa3e20.exe
  "C:\Users\Admin\AppData\Local\Temp\a1c5f268d670ba3a4440647bdeaa3e20.exe" -h
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:4668

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:1524
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
  2⤵
  - Loads dropped DLL
  PID:4444
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4444 -s 600
    3⤵
    - Program crash
    PID:388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4444 -ip 4444
1⤵
PID:404

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
54ac3dad9676bf56d6d5916d099b7859

SHA1
02a2b6459c451069a81aebaf1fa7753b663f4c6a

SHA256
e0e68ac4dc7141316a94c076f2b503e104207bcc2746dfa9e0c64a17bc984a0a

SHA512
7239359a7e22eb6a12ab370d52666fd67247d50dd52a58fffe2998ab16916088da7b15dd28c25bedc29f7ad4889f5e7a0f53cff94ea38843fc8060760d124c1d

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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