cosmu | 0698fe6386b6045d26198bdce43c7a753e2449b11a77969cecff3554cf0a2c2d

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
16/04/2026, 20:04

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General

Target
2026-04-16_88e0ed5bd218924dc0af1bc9abfa2dc1_cobalt-strike_elex_wannacry.exe
Size 2.9MB
Sample260416-ys9pvsc16w
SHA256 0698fe6386b6045d26198bdce43c7a753e2449b11a77969cecff3554cf0a2c2d
MD5 88e0ed5bd218924dc0af1bc9abfa2dc1
SHA1 8594e4f18be81e31445d4a12fd747d135fda7251
SHA512 dd149cad170a47d24d79eb97639b4a1b0de8e09bd80872baa8d184c5b43d0d8800d8cf103c0dfbad741ba63d2950dd8dc397e3471a52a63b894eaad63116df91
SSDEEP 49152:G424pOK123wBa1c603wsZga2udET1I+51Oj1CvTA+GG6OA:3qEv60gsOTGMNA
TLSH
T144E5299A767CB970D491543FFEA89A83AD8B4D112285577C00B941A34F480B7FC8AFED
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/4952-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/memory/4952-1-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Custom signature

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral2/memory/4952-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/4952-1-0x0000000000400000-0x000000000040A000-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	2026-04-16_88e0ed5bd218924dc0af1bc9abfa2dc1_cobalt-strike_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-04-16_88e0ed5bd218924dc0af1bc9abfa2dc1_cobalt-strike_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_88e0ed5bd218924dc0af1bc9abfa2dc1_cobalt-strike_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4952

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/4952-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/4952-1-0x0000000000400000-0x000000000040A000-memory.dmp