8979e74303550e257eb92225507bf2fb128cebde5f3f6e36b4236e822e194f64

Analysis

max time kernel
308s
max time network
309s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
06-09-2024 22:51

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General

Target

[UPG]CSS.exe
Size

1.2MB
MD5

99b098b23ced1a199145fe5577c9de91
SHA1

84031f7b3c97759d56b14591e1cf0ba1f552f201
SHA256

8979e74303550e257eb92225507bf2fb128cebde5f3f6e36b4236e822e194f64
SHA512

05cf74845b264ef2bf6faf8e8900e0f41baa04d43f989a33abbbb1cae9311789d50388510c836cf6dc5f314000572884a9823973a2c4950bfe0ba4699288fbfb
SSDEEP

24576:7DYoP1JgW1tQ2IXUFTBVx2S8lsdu1Hy+mWdyYoltCeiTVS2vDuc9YDznc:7kUQIF2Aa7TVS2ru0YDT

Score

8^/10

discovery

Malware Config

Signatures

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
724	[UPG]CSS.new.exe
3528	[UPG]CSS.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	[UPG]CSS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	[UPG]CSS.new.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	[UPG]CSS.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1956	[UPG]CSS.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1956	[UPG]CSS.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
1956	[UPG]CSS.exe
1956	[UPG]CSS.exe
1956	[UPG]CSS.exe
1956	[UPG]CSS.exe
724	[UPG]CSS.new.exe
724	[UPG]CSS.new.exe
3528	[UPG]CSS.exe
3528	[UPG]CSS.exe
3528	[UPG]CSS.exe
3528	[UPG]CSS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 724	1956	[UPG]CSS.exe	78
PID 1956 wrote to memory of 724	1956	[UPG]CSS.exe	78
PID 1956 wrote to memory of 724	1956	[UPG]CSS.exe	78
PID 724 wrote to memory of 3528	724	[UPG]CSS.new.exe	79
PID 724 wrote to memory of 3528	724	[UPG]CSS.new.exe	79
PID 724 wrote to memory of 3528	724	[UPG]CSS.new.exe	79

C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.exe
"C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.new.exe
  "C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.new.exe" /update "C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:724
- - C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.exe
    "C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.exe" /delete "C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.new.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:3528

C:\Windows\SysWOW64\werfault.exe
werfault.exe /h /shared Global\f085d1fb65674846b230056b305983e2 /t 2924 /p 3528
1⤵
PID:3228

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

C:\Users\Admin\AppData\Local\Temp\[UPG]CSS.new.exe

Filesize
1.2MB

MD5
99b098b23ced1a199145fe5577c9de91

SHA1
84031f7b3c97759d56b14591e1cf0ba1f552f201

SHA256
8979e74303550e257eb92225507bf2fb128cebde5f3f6e36b4236e822e194f64

SHA512
05cf74845b264ef2bf6faf8e8900e0f41baa04d43f989a33abbbb1cae9311789d50388510c836cf6dc5f314000572884a9823973a2c4950bfe0ba4699288fbfb

Download Submit
memory/724-7-0x0000000000B10000-0x0000000000B11000-memory.dmp

Filesize
4KB

Download
memory/724-12-0x0000000000400000-0x000000000053E000-memory.dmp

Filesize
1.2MB

Download
memory/1956-0-0x0000000002640000-0x0000000002641000-memory.dmp

Filesize
4KB

Download
memory/1956-1-0x00000000029A0000-0x00000000029A1000-memory.dmp

Filesize
4KB

Download
memory/1956-8-0x0000000000400000-0x000000000053E000-memory.dmp

Filesize
1.2MB

Download
memory/3528-13-0x0000000002500000-0x0000000002501000-memory.dmp

Filesize
4KB

Download
memory/3528-16-0x0000000002860000-0x0000000002861000-memory.dmp

Filesize
4KB

Download
memory/3528-30-0x0000000002500000-0x0000000002501000-memory.dmp

Filesize
4KB

Download
memory/3528-31-0x0000000000400000-0x000000000053E000-memory.dmp

Filesize
1.2MB

Download