a5f6e0a00c8979e377952a9570d0e1604ac5dbdddfce11fc9d66afc99889aff4

Analysis

max time kernel
148s
max time network
143s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/10/2026, 19:34

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General

Target
a5f6e0a00c8979e377952a9570d0e1604ac5dbdddfce11fc9d66afc99889aff4.dll
Size 659KB
Sample261009-yaerrsea79
SHA256 a5f6e0a00c8979e377952a9570d0e1604ac5dbdddfce11fc9d66afc99889aff4
MD5 f7737c280f76eab9682f0c5dcf6426f5
SHA1 1956bea85e6c2605b2e610262b3963522d531d0f
SHA512 ff7e6bba6045b16785ad3287e7de9554895c2540ffc89bc22ebcb76a7a025a3ff4718291f4dbe88c0285deeeded7ab76689fbb3c3a6e15621611d7ce71b60530
SSDEEP 12288:X8tX2aJf3LTwEjx21gfcupc5e6PQBxiqGVspixqlzZsVubmCqhbebyET5yais2Xp:XA2ah5Vv3pc5e64BxKUz6ubqhbPETd8Z
TLSH
T19BE4231DA5D6B188F77A83B01FB3C0053C089188C5D7F9DCFC59F41BAD9BA0A5689E26
MD5 SHA1 SHA512 SSDEEP TLSH

Score

5^/10

discovery upx

Malware Config

Signatures

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\AntiCheatExpert\InGame\x86\ACE-DRV32.dll	rundll32.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4552-0-0x0000000010000000-0x00000000102BA000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5344	4552	WerFault.exe	88

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

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{F935DC20-1CF0-11D0-ADB9-00C04FD58A0B}\1.0\HELPDIR	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{F935DC20-1CF0-11D0-ADB9-00C04FD58A0B}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{F935DC20-1CF0-11D0-ADB9-00C04FD58A0B}\1.0	rundll32.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 4552	4948	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a5f6e0a00c8979e377952a9570d0e1604ac5dbdddfce11fc9d66afc99889aff4.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a5f6e0a00c8979e377952a9570d0e1604ac5dbdddfce11fc9d66afc99889aff4.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:4552
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4552 -s 812
    3⤵
    - Program crash
    PID:5344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4552 -ip 4552
1⤵
PID:5476

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4552-0-0x0000000010000000-0x00000000102BA000-memory.dmp

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memory/4552-4-0x0000000001420000-0x0000000001520000-memory.dmp

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memory/4552-5-0x0000000010000000-0x00000000102BA000-memory.dmp

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memory/4552-6-0x0000000001420000-0x0000000001520000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads