cosmu | ff7947d86af0eda9f47a0c2aa25c4890f1bc86cb126440af2e50f6e81ab20d5a

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
05/05/2026, 07:34

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General

Target
2026-05-05_e3fba57afc4fed761d5cde4ad7741ea7_cobalt-strike_elex_wannacry.exe
Size 4.5MB
Sample260505-jec2eaev6k
SHA256 ff7947d86af0eda9f47a0c2aa25c4890f1bc86cb126440af2e50f6e81ab20d5a
MD5 e3fba57afc4fed761d5cde4ad7741ea7
SHA1 3e3e3118302eb200fc95e49745867f409ebe29bd
SHA512 d5dda3b66ca280d41324cf8a4553284788380bc0b2c0ec7777b94e9d012943306c3fc426874bd1ced1e21e782ef8a342f63bb8ef8048a74e4488cd53665e9c27
SSDEEP 49152:G424pOK123wBa1c603wsZga2udET1I+51Oj1CvTA+GG6OHrPeO9ro3mb6S7Q6HBh:3qEv60gsOTGMNLPeSo3Q/dHBiDfkKa
TLSH
T1FB266B99663CB870E491543FAEA896839D8B5D113289DF7C00B541638F580B7FC89FAF
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/4912-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral1/memory/4912-1-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Custom signature

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral1/memory/4912-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral1/memory/4912-1-0x0000000000400000-0x000000000040A000-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	2026-05-05_e3fba57afc4fed761d5cde4ad7741ea7_cobalt-strike_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-05-05_e3fba57afc4fed761d5cde4ad7741ea7_cobalt-strike_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-05_e3fba57afc4fed761d5cde4ad7741ea7_cobalt-strike_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4912

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/4912-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/4912-1-0x0000000000400000-0x000000000040A000-memory.dmp