cosmu | 3b983a029cf8552bb98b10e7637dba737fe05de30e5b0caf9b5910346faac5f5

Analysis

max time kernel
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
30/09/2026, 11:09

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General

Target
2026-09-30_5c4665cd980cef0f519a30edcd7261cb_elex_wannacry.exe
Size 443KB
Sample260930-m9arbadg36
SHA256 3b983a029cf8552bb98b10e7637dba737fe05de30e5b0caf9b5910346faac5f5
MD5 5c4665cd980cef0f519a30edcd7261cb
SHA1 6e81ae418b8066804382e608f116ea1063e72659
SHA512 b659a2f50f278ce9385f544209571d80cb37359a114f422cbb7e053a1a4d36b134d4e117f7034d79ca68a784b6090a201211a7d1a4fc99f29ecad505279f08dd
SSDEEP 6144:0HL3rYMv0pilFvAfTtYHHu8C/TXmrILr9iMGsSaOyiZ:GDvvUcFvACw7XmrS9iMGsSaOyiZ
TLSH
T100A418C50053CBC2DE1E46799BE9BD5810F1966AACE9CFE04A4A6632C204F1F517ECDB
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 2 IoCs

Cosmu is a worm written in C++.

resource	yara_rule
behavioral2/memory/856-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/memory/856-1-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral2/memory/856-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/856-1-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor

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	2026-09-30_5c4665cd980cef0f519a30edcd7261cb_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-09-30_5c4665cd980cef0f519a30edcd7261cb_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-30_5c4665cd980cef0f519a30edcd7261cb_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:856

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/856-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/856-1-0x0000000000400000-0x000000000040A000-memory.dmp