cosmu | e786eae6a8ee65ec0d3c357061312e6e26ba2413ef5b8fbc1a004795cf90f2ea

Analysis

max time kernel
149s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
10/05/2026, 21:26

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General

Target
2026-05-10_612e5f1f723519cdcec1f91e0ebb7f61_elex_wannacry.exe
Size 5.9MB
Sample260510-1afp6sez21
SHA256 e786eae6a8ee65ec0d3c357061312e6e26ba2413ef5b8fbc1a004795cf90f2ea
MD5 612e5f1f723519cdcec1f91e0ebb7f61
SHA1 86fe6a040449e5bd7544cbe0568757f11319afda
SHA512 47b68e4120b90b069e18d90920f4ac285368fc5e38d919c1577a46cf19db7727ab26d05b63d43d477545f92e5b1415e1dad1b90abc8add817b82a30e2915567f
SSDEEP 49152:GHIfSkXXPLetEBZuop98aH6kG52gNNG9okukbP0mVRRT7x:ZfS+XytEBZuop99H6JsobA/RL
TLSH
T1C7563B2A976141D6D32C9B3870EBF35DF311BC0ED4E528887794A3E47F45F42A626A32
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/3356-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/memory/3356-1-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Custom signature

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral2/memory/3356-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/3356-1-0x0000000000400000-0x000000000040A000-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	2026-05-10_612e5f1f723519cdcec1f91e0ebb7f61_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-05-10_612e5f1f723519cdcec1f91e0ebb7f61_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-10_612e5f1f723519cdcec1f91e0ebb7f61_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3356

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/3356-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/3356-1-0x0000000000400000-0x000000000040A000-memory.dmp