77b93ab10cebe802ef48ffbb2cf30405959315d74a5a9cee2e20a020f59430db

Analysis

max time kernel
148s
max time network
132s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
12/07/2026, 00:19

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General

Target
nbtool-0.02/cygwin1.dll
Size 1.8MB
Sample260712-ame2asbv8q
SHA256 77b93ab10cebe802ef48ffbb2cf30405959315d74a5a9cee2e20a020f59430db
MD5 af9801d354c3aed2a14034d7da2a949c
SHA1 489a8ca7c7851088ade58c404ddde1a926559003
SHA512 1d720945838c3b3cbd12fb5bdb1c54c9b60d331fdefd97e1241b2eda12fb554c81a64020eef5fc69ae27f012e76a44271ced3565b313ebcf61dcc62686f93c09
SSDEEP 49152:58f/HEjHfsRwTuSidj/NSimYP/sv31TVDhywfiMrV:58fPEjHf8wTutmYP/sf1TVDhR6+
TLSH
T1EC855C4576CB08FBD813063881DB677F9735A7204252CB9BEA48AC758F1B9C1AF25B07
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

discovery

Malware Config

Signatures

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4568	4820	WerFault.exe	88

System Location Discovery: System Language Discovery 1 TTPs 2 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies data under HKEY_USERS 4 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Cygnus Solutions	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Cygnus Solutions\Cygwin	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Cygnus Solutions\Cygwin\mounts v2	rundll32.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5004 wrote to memory of 4908	5004	rundll32.exe	87
PID 4908 wrote to memory of 4820	4908	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\nbtool-0.02\cygwin1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5004
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\nbtool-0.02\cygwin1.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4908
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\nbtool-0.02\cygwin1.dll,#1
    3⤵
    - System Location Discovery: System Language Discovery
    - Modifies data under HKEY_USERS
    PID:4820
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4820 -s 660
      4⤵
      Program crash
      PID:4568

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4820 -ip 4820
1⤵
PID:3764

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/4820-2-0x0000000061000000-0x0000000061200000-memory.dmp

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memory/4820-3-0x0000000061000000-0x0000000061200000-memory.dmp

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memory/4820-5-0x0000000061000000-0x0000000061200000-memory.dmp

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memory/4908-1-0x0000000061167000-0x0000000061168000-memory.dmp

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memory/4908-0-0x0000000061000000-0x0000000061200000-memory.dmp

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memory/4908-7-0x0000000061000000-0x0000000061200000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads