cosmu | 1ed58d111fa49ef5a8fb2aaa784ea72e4f6aa0b1ea9af6c57480f7795a428467

Analysis

max time kernel
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260629-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
01/07/2026, 12:04

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-07-01_45c63932596281072a92d0f071a12e93_elex_wannacry.exe
Size 21KB
Sample260701-n8m6padt3r
SHA256 1ed58d111fa49ef5a8fb2aaa784ea72e4f6aa0b1ea9af6c57480f7795a428467
MD5 45c63932596281072a92d0f071a12e93
SHA1 4055301cd391b75bf0caa8e2eb2497fe69be4748
SHA512 8e86e8e2fd9b1e5388e1b6170fe79b413e761b50ca204a116c73c78e5ea704b1eddc473c18060208acb612f17ed6d425e45d74ae7323b18565e2122be3245d7a
SSDEEP 384:KlxBt7Br5xjL8tAgobS37bhHKWL27GfBsUAQ:KD7BlpQUbSrbhHK027OuU
TLSH
T1C8A25B6FAB0DC0B1D3CD8534086D397CDC33A2282675AF9BF729CC49552A291D87C29A
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/4936-0-0x0000000000400000-0x0000000000408000-memory.dmp	family_cosmu

Program crash 1 IoCs

pid	pid_target	Process	procid_target
6376	4936	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	2026-07-01_45c63932596281072a92d0f071a12e93_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-07-01_45c63932596281072a92d0f071a12e93_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_45c63932596281072a92d0f071a12e93_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4936
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4936 -s 256
  2⤵
  - Program crash
  PID:6376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4936 -ip 4936
1⤵
PID:5264

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

Loading Replay Monitor...

Downloads

memory/4936-0-0x0000000000400000-0x0000000000408000-memory.dmp

Download