cosmu | 5143d934a90aee599879b1920deae5ee45e74ca4ce144cf7931de0eb20fbc89e

Analysis

max time kernel
149s
max time network
100s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
20/04/2026, 11:15

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General

Target
2026-04-20_9046b6553c75bac33938c145112f380f_elex_wannacry.exe
Size 814KB
Sample260420-nc2dfacx4v
SHA256 5143d934a90aee599879b1920deae5ee45e74ca4ce144cf7931de0eb20fbc89e
MD5 9046b6553c75bac33938c145112f380f
SHA1 eb56659af00c7dc506304e1772e94a0e544996a1
SHA512 bb4a51d51c6c49847e6bd3cc8e016d34fda22cb244ecbeb0bfa6c42c28b3c6f1fbccfb94a8ba6ec1288f5942c5372df9a70400a23a6e2e292801467990553db5
SSDEEP 12288:GPkx/Q4mNRQ1OlmjRMF/lKet4NIIwBaNHEicDO2iKClF8:GpRQLRItoIGNB0O2iK
TLSH
T1D705C72CA46BD28ADD5046F064CAFC9C4B14BA26E8B55D6447ADB33DD3D033EA50C3B6
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/3388-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/memory/3388-2-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Custom signature

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral2/memory/3388-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/3388-2-0x0000000000400000-0x000000000040A000-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	2026-04-20_9046b6553c75bac33938c145112f380f_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-04-20_9046b6553c75bac33938c145112f380f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-20_9046b6553c75bac33938c145112f380f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3388

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/3388-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/3388-2-0x0000000000400000-0x000000000040A000-memory.dmp