expiro | b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8

Analysis

max time kernel
94s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
16-02-2025 17:40

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General

Target

b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Size

605KB
MD5

ba28a2ab6f837173f5ecd70e03942010
SHA1

3e28fa597a5b4f6e1ddc838dd3d69f91d991a262
SHA256

b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8
SHA512

9b52547ae0303c6361be9f1e8a1cf24c206e5309cec57fad7bce2fc2cea24acba173e6b8038a4459cd09e0c06c37db96275957f8e36e9109c4cf08b7b202e6e5
SSDEEP

12288:sr6tql9pktyCk7A5g7SPzOy5WUZ2CgijLLRS741m73OO6SuBtMT:srfpkP7g2PzOy5WUZVgij/RSx73OjBtM

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
behavioral1/memory/1064-2-0x0000000001000000-0x00000000011BC000-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	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe

Modifies registry class 12 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.wab	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.vcf	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.vcf\ = "vcard_wab_auto_file"	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.vcf\Content Type = "text/x-vcard"	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\ = "vCard File"	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.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"	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\DefaultIcon\ = "\"C:\\Program Files (x86)\\Windows Mail\\wab.exe\",1"	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\shell\open\command	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\vcard_wab_auto_file\DefaultIcon	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Content Type\text/x-vcard	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Content Type\text/x-vcard\Extension = ".vcf"	b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe

C:\Users\Admin\AppData\Local\Temp\b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe
"C:\Users\Admin\AppData\Local\Temp\b8de74ab9bd042e7b9f3c6abaa7f9f803afa67b4027e1f1bc04285567511ffd8N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
PID:1064

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/1064-0-0x0000000001000000-0x00000000011BC000-memory.dmp

Filesize
1.7MB

Download
memory/1064-1-0x0000000001003000-0x0000000001004000-memory.dmp

Filesize
4KB

Download
memory/1064-2-0x0000000001000000-0x00000000011BC000-memory.dmp

Filesize
1.7MB

Download