2db44b086d860c51a4f45f43a739cd20fb0822189deb1c1cf13e4b5a3b05bc3b

Analysis

max time kernel
145s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
04/09/2024, 17:43

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General

Target

bin/zlib1.dll
Size

140KB
MD5

b4be42518e7ecb8758d2d184db0cc674
SHA1

de68a823b6fd95ef7b9f6ea87fb0004462258701
SHA256

49ff1dba97bf62f0bfd5f357e08be7c2617b2f64b56eedaaf161e07bc6a7cfc0
SHA512

85fe5efb43785c835bfed27b44965d261a337b653fd46f8890c8309cbe7b210359f393e28fb091784fa8646b38996b1cfd464e0a9f511375e498498aec59117f
SSDEEP

3072:sEpp8vhVUC3mYFhgBv89foW+jv4y2WVkIXBrm6P05:sEHyhVrzkBvwgW+jt2WV/xrm/5

Score

3^/10

discovery

Malware Config

Signatures

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4612	4268	WerFault.exe	78

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

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4088 wrote to memory of 4268	4088	rundll32.exe	78
PID 4088 wrote to memory of 4268	4088	rundll32.exe	78
PID 4088 wrote to memory of 4268	4088	rundll32.exe	78

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bin\zlib1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4088
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bin\zlib1.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4268
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4268 -s 460
    3⤵
    - Program crash
    PID:4612

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4268 -ip 4268
1⤵
PID:800

Network

MITRE ATT&CK Enterprise v15

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

Replay Monitor

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Downloads

memory/4268-0-0x0000000063080000-0x00000000630A8000-memory.dmp

Filesize
160KB

Download
memory/4268-2-0x0000000064B40000-0x0000000064B54000-memory.dmp

Filesize
80KB

Download
memory/4268-1-0x000000006EB40000-0x000000006EB64000-memory.dmp

Filesize
144KB

Download