expiro | db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033

Analysis

max time kernel
92s
max time network
95s
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 10:25

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General

Target

db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Size

541KB
MD5

b70ad6cb1abbe25618df017e1b1ab460
SHA1

3dbc2221c17649846b23c3844bf8fda6ceec5455
SHA256

db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033
SHA512

418e5de9edeadeac9b3684a6de59cf85bf1872ee37b8c2c0012af0f9f37b7d9c5bde6bc0cf6ae5a22d32c39483ac639540cbb7c99831e7c7a2cb13257eebc657
SSDEEP

12288:Ut62j/hi8IHO/hXWeNgqLq8RmS31xeQ5:Ut5guvNgUq8RmS3T

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/2760-2-0x0000000001000000-0x00000000011B3000-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	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe

Modifies registry class 13 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.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"	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\DefaultIcon	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Content Type\text/x-vcard	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Content Type\text/x-vcard\Extension = ".vcf"	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.vcf	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.vcf\ = "vcard_wab_auto_file"	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.vcf\Content Type = "text/x-vcard"	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\DefaultIcon\ = "\"C:\\Program Files (x86)\\Windows Mail\\wab.exe\",1"	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.wab	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\ = "vCard File"	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\shell\open\command	db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe

C:\Users\Admin\AppData\Local\Temp\db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe
"C:\Users\Admin\AppData\Local\Temp\db73541f290f2b87a1f6de498dc9b2375d59eecdc7b4aab4b026fdb950407033N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
PID:2760

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1708

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/2760-0-0x0000000001000000-0x00000000011B3000-memory.dmp

Filesize
1.7MB

Download
memory/2760-1-0x0000000001003000-0x0000000001004000-memory.dmp

Filesize
4KB

Download
memory/2760-2-0x0000000001000000-0x00000000011B3000-memory.dmp

Filesize
1.7MB

Download