expiro | 6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974

Analysis

max time kernel
95s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-01-2025 21:15

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General

Target

6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Size

605KB
MD5

c5af0aafbf974c335a82219f06262fa0
SHA1

3bd0511f99c28313648341f1ce880051e2c37996
SHA256

6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974
SHA512

0b10c8cce410f1007bee19a0e21fd90e5036a009c71a0aface5b9a846b927dc3af9c7a2b2c222fb7d743c305a34cc8c191de183b7d0bc5806b76728426bde82a
SSDEEP

12288:sK6zvrB1WtXOyX2fULXmsYOmrX0R+j03kG12XlY7+oWTePa1:sKUDf4XrX2fULXrmrX0oj03Tl7+oWTqC

Score

10^/10

expiro backdoor discovery

Malware Config

Signatures

Expiro family
expiro
Expiro, m0yv
Expiro aka m0yv is a multi-functional backdoor written in C++.
backdoor expiro

Expiro payload 1 IoCs

backdoor

resource	yara_rule
behavioral2/memory/1576-2-0x0000000001000000-0x00000000011BC000-memory.dmp	family_expiro1

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe

Modifies registry class 13 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Content Type\text/x-vcard	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Content Type\text/x-vcard\Extension = ".vcf"	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\.vcf	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\ = "vCard File"	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\shell\open\command	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\DefaultIcon	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\DefaultIcon\ = "\"C:\\Program Files (x86)\\Windows Mail\\wab.exe\",1"	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.wab	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\.vcf\ = "vcard_wab_auto_file"	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\.vcf\Content Type = "text/x-vcard"	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\shell\open\command\ = "\"C:\\Program Files (x86)\\Windows Mail\\wab.exe\" /vcard %1"	6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe

C:\Users\Admin\AppData\Local\Temp\6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe
"C:\Users\Admin\AppData\Local\Temp\6d5b0c5353d555fe3d9d5a02a403f02ad3edc40711e4424755b8219f95253974N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
PID:1576

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1576-0-0x0000000001000000-0x00000000011BC000-memory.dmp

Filesize
1.7MB

Download
memory/1576-1-0x0000000001003000-0x0000000001004000-memory.dmp

Filesize
4KB

Download
memory/1576-2-0x0000000001000000-0x00000000011BC000-memory.dmp

Filesize
1.7MB

Download