cosmu | 1f1c1da7935844f67990a56de817f2675821ced3ec84b13c8f7e6121d90172ad

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
19/04/2026, 12:11

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General

Target
2026-04-19_86091ce872c37102d2b95653418843a8_elex_wannacry.exe
Size 686KB
Sample260419-pc5arshx7r
SHA256 1f1c1da7935844f67990a56de817f2675821ced3ec84b13c8f7e6121d90172ad
MD5 86091ce872c37102d2b95653418843a8
SHA1 85271b203cb420a2d851b1f27ca1cfe59c331514
SHA512 70386684494a06d7bdc697689542dbf06309bb254e4ccd5e0fc507c311bad1ee0ec911dbd0a5affd8a7ca1ec247869584d4025821d784272334d7139280b8506
SSDEEP 6144:0HxJM7ZDfvVkmjRcyxZ5aiS5uhvPFWmuFlEzrdPZE4SmRUi8lxmFJ:GPk3tcM4uhFWm0Evdm4SelFJ
TLSH
T176E4F29436797870C9D6083DDC2A38D8ACF37EBDA5C489BE55D4740B0740AA3F91A1EE
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/1616-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/memory/1616-1-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral2/memory/1616-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/1616-1-0x0000000000400000-0x000000000040A000-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	2026-04-19_86091ce872c37102d2b95653418843a8_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-04-19_86091ce872c37102d2b95653418843a8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-19_86091ce872c37102d2b95653418843a8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1616

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/1616-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/1616-1-0x0000000000400000-0x000000000040A000-memory.dmp