cosmu | 722fdf31a5ee3b50cbe53e1c95c2fd640131e2a532f238172af48d4779bb6156

Analysis

max time kernel
148s
max time network
125s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/10/2026, 22:32

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General

Target
2026-10-15_f7bd6dcb900ac92fa05ecea49251cd01_elex_wannacry.exe
Size 21KB
Sample261015-2gft7aee86
SHA256 722fdf31a5ee3b50cbe53e1c95c2fd640131e2a532f238172af48d4779bb6156
MD5 f7bd6dcb900ac92fa05ecea49251cd01
SHA1 a2193e98e3d0cd8d4b04be23afb62a39b6990aa9
SHA512 1aa44f8e362077a75b8d3ca0a1c483c5ea44db8e591ab1aaa0ad7b3dba636757f73ca9ddb59054aca0390954aafad1749a202f402564a54d03fad427d2575629
SSDEEP 384:KlxBt7Br5xjLlNAgobS37bhoKWLs7GfBsUAQ:KD7BlpRNUbSrbhoK0s7OuU
TLSH
T18CA26C6F5F0DC471D38D8534086E397CDC3362282675BF4BF729CC0A5526291D87829B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery cosmu worm

Malware Config

Signatures

Family: Cosmu
Cosmu is a Windows worm written in C++.
worm cosmu

Detects Cosmu payload 1 IoCs

Cosmu is a worm written in C++.

resource	yara_rule
behavioral2/memory/4980-0-0x0000000000400000-0x0000000000408000-memory.dmp	family_cosmu

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4572	4980	WerFault.exe	87

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	2026-10-15_f7bd6dcb900ac92fa05ecea49251cd01_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-10-15_f7bd6dcb900ac92fa05ecea49251cd01_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-15_f7bd6dcb900ac92fa05ecea49251cd01_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4980 -s 256
  2⤵
  - Program crash
  PID:4572

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 392 -p 4980 -ip 4980
1⤵
PID:3768

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

Replay Monitor

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Downloads

memory/4980-0-0x0000000000400000-0x0000000000408000-memory.dmp

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