cosmu | 0a3fda494d52e23ecbbaa45a714e03335d39d407e2a9984f5675bb9a4099aa78

Analysis

max time kernel
148s
max time network
129s
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, 11:09

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General

Target
2026-10-19_a52bdaa8543a97a95ee127710f5054c2_elex_wannacry.exe
Size 21KB
Sample261020-m84yrsbb78
SHA256 0a3fda494d52e23ecbbaa45a714e03335d39d407e2a9984f5675bb9a4099aa78
MD5 a52bdaa8543a97a95ee127710f5054c2
SHA1 62c12d1e2cc4d339deb474400e10de4215db7a54
SHA512 eb9f38d54e219f55f3df579852b63ef24c2e21171974bc6fd58b27e03be9e499016a064d175b8b9a49c132b4fe77e6815842d04d02273b0e1726648b15183301
SSDEEP 384:KlxBt7Br5xjL0rJAgobS37bhoKWLs7GfBsUAQ:KD7Blp4NUbSrbhoK0s7OuU
TLSH
T151A26B6F9B0EC071D38D8534086E297CDC3362282675BF8BF72ACC4A55262D1D87829B
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/4948-0-0x0000000000400000-0x0000000000408000-memory.dmp	family_cosmu

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2632	4948	WerFault.exe	90

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_a52bdaa8543a97a95ee127710f5054c2_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-10-19_a52bdaa8543a97a95ee127710f5054c2_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-19_a52bdaa8543a97a95ee127710f5054c2_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4948 -s 268
  2⤵
  - Program crash
  PID:2632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4948 -ip 4948
1⤵
PID:4488

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:3872

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/4948-0-0x0000000000400000-0x0000000000408000-memory.dmp

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