e9d67a2e057ca30600aa7c21e7026844238265755fc03f78a4fb78f7d0e48883

Analysis

max time kernel
130s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16-08-2024 21:08

Target

$SYSDIR/zlib.dll
Size

68KB
MD5

babfd98a4ecd496b9f6a093338063c9c
SHA1

05372090fd0f15a06c8b3f27beeeb60759a72522
SHA256

eeec6f4c5d0dcfac04a2979dd5728a47c67a35761759a5180d52d5124a5f8194
SHA512

3e474d0af6097ce7f747f632bd7d7b0eea0d333d38a0c32742df677784ec25fda11a764f8c0883d465c9634400f574a6a71be87203e0f1dc892e6b0943b7c0e5
SSDEEP

768:yRagNMRy7pA2cp+k8AVfgibjlR1L+zwWMyKO+zlSXuriOxPj6:yRkRmpITVfgin1iz91C8zA

Score

3^/10

discovery

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4368 1792 WerFault.exe rundll32.exe
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
discovery

System Language Discovery
T1614.001

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe

pid	pid_target	process	target process
4368	1792	WerFault.exe	rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 2204 wrote to memory of 1792	2204	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 1792	2204	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 1792	2204	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$SYSDIR\zlib.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$SYSDIR\zlib.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1792
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1792 -s 604
    3⤵
    - Program crash
    PID:4368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1792 -ip 1792
1⤵
PID:2704

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

System Language Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

memory/1792-0-0x0000000001150000-0x0000000001177000-memory.dmp

Filesize
156KB

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