cosmu | 5e43f0b980ebe61eb57e36d07d0e97927f97a4d773b00ee0c8e7a4b68b942352

Analysis

max time kernel
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
28/08/2026, 03:16

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General

Target
2026-08-27_e8b7984d3ddfae604d04d461f999e31a_cobalt-strike_elex_hijackloader_vidar_wannacry.exe
Size 802KB
Sample260828-dsty7asgre
SHA256 5e43f0b980ebe61eb57e36d07d0e97927f97a4d773b00ee0c8e7a4b68b942352
MD5 e8b7984d3ddfae604d04d461f999e31a
SHA1 9eedb5a6a4f9673ec0e250b0ca28d621922a33b8
SHA512 94298d97e043f6db012b6f4e463b9861d3bc6d8866281e0efa0f0ba33d41264b9d2688942404c32558f4bd502bbe0028563c8f7ce0c774313a24350924d0aba2
SSDEEP 12288:GbRX4rJzFa1pgpqQT7uVp0VPBuOpiK8SGLsr+d/3MYrTlFb:GbJZ1ypqz/BLsr+dp
TLSH
T18D05492CA67782E4E1BC9B3021A53B64C970F09D66DCCA7A4653F7280B59F91FC6436C
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/5204-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/memory/5204-1-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral2/memory/5204-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/5204-1-0x0000000000400000-0x000000000040A000-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	2026-08-27_e8b7984d3ddfae604d04d461f999e31a_cobalt-strike_elex_hijackloader_vidar_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-08-27_e8b7984d3ddfae604d04d461f999e31a_cobalt-strike_elex_hijackloader_vidar_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-27_e8b7984d3ddfae604d04d461f999e31a_cobalt-strike_elex_hijackloader_vidar_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:5204

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/5204-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/5204-1-0x0000000000400000-0x000000000040A000-memory.dmp