cosmu | 19ec2f8f8d93faf8df8b7c426447a8ab27ae339b6276873a06516debf1bf6f77

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
20/10/2026, 18:48

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General

Target
2026-10-19_6138efbdf66c1283b8f711417b62429a_elex_wannacry.exe
Size 21KB
Sample261020-xftbnsch33
SHA256 19ec2f8f8d93faf8df8b7c426447a8ab27ae339b6276873a06516debf1bf6f77
MD5 6138efbdf66c1283b8f711417b62429a
SHA1 53c93304c6219a1b4b5933405877172f7a4a13bc
SHA512 ff4ddc2d797064882650017b91980639dca8e42856b047a945e7e3af99eb0909d354ea50af778d0d85023498535eed39605900c72b7f490ddcdf1477686b0e62
SSDEEP 384:KlxBt7Br5xjLgbAgobS37bh8KWLx7GfBsUAQ:KD7BlpOUbSrbh8K0x7OuU
TLSH
T126A26CAFAF0DC071C38D8534186D757CDC33A2282675BF8BF329CC0A552B291D87829A
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/4720-0-0x0000000000400000-0x0000000000408000-memory.dmp	family_cosmu

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1728	4720	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	2026-10-19_6138efbdf66c1283b8f711417b62429a_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-10-19_6138efbdf66c1283b8f711417b62429a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-19_6138efbdf66c1283b8f711417b62429a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4720
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4720 -s 256
  2⤵
  - Program crash
  PID:1728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4720 -ip 4720
1⤵
PID:4152

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/4720-0-0x0000000000400000-0x0000000000408000-memory.dmp

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