81b89d3ea9e0dbf57f738ffc85137f1d528f384671e50b68b1ba7ac2fbc58de9

Analysis

max time kernel
136s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
31/01/2023, 10:30

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe
Size

72KB
MD5

9905fbc44d31dcac233e5c6bebc27035
SHA1

824c546905f046702eeeb9405c4b4d7cb03eb8ec
SHA256

4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55
SHA512

3755f29c31aacdc216af3516b17cd9bf91d1d3b38d7913b3107535999c5a182a84ab357fb35fa4d75f7f2d22ecf7820d1a9ae19774d2fde829bb9af726fbd9de
SSDEEP

1536:3vAkGoo+bH/J027ZKxyafwhHCC/mq1ktG:3vuWbaRgaYtX1ktG

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	832	1872	rundll32.exe	47

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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe

Loads dropped DLL 1 IoCs

pid	Process
1888	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
224	1888	WerFault.exe	89

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	15	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4972 wrote to memory of 4524	4972	4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe	84
PID 4972 wrote to memory of 4524	4972	4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe	84
PID 4972 wrote to memory of 4524	4972	4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe	84
PID 832 wrote to memory of 1888	832	rundll32.exe	89
PID 832 wrote to memory of 1888	832	rundll32.exe	89
PID 832 wrote to memory of 1888	832	rundll32.exe	89

C:\Users\Admin\AppData\Local\Temp\4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe
"C:\Users\Admin\AppData\Local\Temp\4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Users\Admin\AppData\Local\Temp\4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe
  "C:\Users\Admin\AppData\Local\Temp\4bff4b7f8db1497c00f3a666cfcbec6b1bad407a1d5f7ad6909e115c3f98ba55.exe" --v
  2⤵
  PID:4524

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:832
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
  2⤵
  - Loads dropped DLL
  PID:1888
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1888 -s 600
    3⤵
    - Program crash
    PID:224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1888 -ip 1888
1⤵
PID:1744

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

Loading Replay Monitor...

Downloads

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

Filesize
557KB

MD5
f1f63fb8caa7c9447692fe4dc35dce65

SHA1
ea4816ff6db602728e97c990c4e71822e262e87c

SHA256
67e6fcfa88fcfe4fa1c87671567bd8bcf3cb2f79a5cb88173552b2222bbd27d2

SHA512
e5984aa82fd76ebe9804678b722ca416c9a890bab10d20a0f0e2a9b348f86ac3da4c210ddb5bd09ecf489ac90cc9f8d1939a489a242fe436a3af84c09743aed5

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dll

Filesize
52KB

MD5
1b20e998d058e813dfc515867d31124f

SHA1
c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

SHA256
24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

SHA512
79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dll

Filesize
52KB

MD5
1b20e998d058e813dfc515867d31124f

SHA1
c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

SHA256
24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

SHA512
79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

Download Submit