cosmu | 59df861ed0e00616c2a3e6c23483a162ddbb20aeb9c8107b1db97135c206e1b5

Analysis

max time kernel
149s
max time network
94s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
02/05/2026, 20:12

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General

Target
2026-05-02_52ce7182d72964b496842a656424ec8e_elex_wannacry.exe
Size 5.5MB
Sample260502-yyweesft2w
SHA256 59df861ed0e00616c2a3e6c23483a162ddbb20aeb9c8107b1db97135c206e1b5
MD5 52ce7182d72964b496842a656424ec8e
SHA1 9d60befeb3f443c6f16557c0de53eb2177bf8248
SHA512 5b6170ccf15384403dce28cc056cec34fc713be5b292630d7ce3dd47cefbce6a73acdb7c1fe57401ea95791604c26b6cfa6c69f8d9650df632c750f70bed0e48
SSDEEP 98304:n4x6LAI1iS32Y/O6CGvd05LwinqS1tRILQM8mHYEYK+hwECGABAulv11aTlA/P1:nVZ1iSrOFNF7HRIECrj/P1
TLSH
T11346BF28F9C0D62CF32961B722DF6C4C5E6DBB69FFC9C90D820A375C906076A3145AD6
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/4752-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/memory/4752-1-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Custom signature

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral2/memory/4752-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/4752-1-0x0000000000400000-0x000000000040A000-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	2026-05-02_52ce7182d72964b496842a656424ec8e_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-05-02_52ce7182d72964b496842a656424ec8e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-02_52ce7182d72964b496842a656424ec8e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4752

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/4752-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/4752-1-0x0000000000400000-0x000000000040A000-memory.dmp