cosmu | 3a431aae0a19fcd5a4d1a7b519b627471c11a73c63bda34ef922b78bc86fa3ba

Analysis

max time kernel
149s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
04/11/2026, 16:55

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General

Target
2026-11-03_73eade109568e232be37d31806c65e99_elex_wannacry.exe
Size 92KB
Sample261104-vfhttsbx5x
SHA256 3a431aae0a19fcd5a4d1a7b519b627471c11a73c63bda34ef922b78bc86fa3ba
MD5 73eade109568e232be37d31806c65e99
SHA1 e5a44d41ec5130a075daef84490504aad5ec277a
SHA512 1157fa5110da628f9c0038e529f09062769224ee109b9a34b44f5878de3afac2228f1bec393a79f6c02737b4df59431f6987852d52dd20bc369aa1e2786aa92a
SSDEEP 768:Z7BlpcupARFbh6q1pim2PlSaW97X7vX9O7X7vAiuyIEd7gN+:Z7ZcupAp6q1p2KMIwY+
TLSH
T1EF9384C9795FF789E64A2030D91317BE4EB690176E608ACBB78DF4EC6761AD0F01C426
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
behavioral1/memory/4580-0-0x0000000000400000-0x000000000040B000-memory.dmp	family_cosmu
behavioral1/memory/4580-1-0x0000000000400000-0x000000000040B000-memory.dmp	family_cosmu

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral1/memory/4580-0-0x0000000000400000-0x000000000040B000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral1/memory/4580-1-0x0000000000400000-0x000000000040B000-memory.dmp	INDICATOR_EXE_Packed_eXPressor

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1452	4580	WerFault.exe	83

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	2026-11-03_73eade109568e232be37d31806c65e99_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-11-03_73eade109568e232be37d31806c65e99_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-03_73eade109568e232be37d31806c65e99_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4580
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4580 -s 228
  2⤵
  - Program crash
  PID:1452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4580 -ip 4580
1⤵
PID:2344

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/4580-0-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/4580-1-0x0000000000400000-0x000000000040B000-memory.dmp