expiro | ad8032fb428d37013ab5eb7bda35e9f07a1361979659b29821e093bd5e097d61

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-01-2025 17:52

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General

Target

ad8032fb428d37013ab5eb7bda35e9f07a1361979659b29821e093bd5e097d61.exe
Size

599KB
MD5

e18360759c1cb645ffdcee33fe1b0d1d
SHA1

cec5b35187646471de9e7777ad6624cef832640d
SHA256

ad8032fb428d37013ab5eb7bda35e9f07a1361979659b29821e093bd5e097d61
SHA512

c0ff3dbb383cdb627c667d214c4e0aa1e8a6fcdb30371f60c6fd91d5a96ccc1eb4c5df2c20ca348e10a02657e829fe020e9acdeb51b531d2f90a76746e2131a6
SSDEEP

12288:W7gKNkhm/JuyXnPB+h8WHHsp7+aFVLr7vJ6yNGbRwQjCz3ruZ+MNLbF3gQURq:W7zNkhm5PBXi8yyL3RXORwQm7PMNLh3k

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 3 IoCs

backdoor

resource	yara_rule
behavioral2/memory/4224-0-0x00000000004BA000-0x000000000054F000-memory.dmp	family_expiro1
behavioral2/memory/4224-1-0x0000000000420000-0x000000000054F000-memory.dmp	family_expiro1
behavioral2/memory/4224-2-0x00000000004BA000-0x000000000054F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2888	4224	WerFault.exe	81

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	ad8032fb428d37013ab5eb7bda35e9f07a1361979659b29821e093bd5e097d61.exe

C:\Users\Admin\AppData\Local\Temp\ad8032fb428d37013ab5eb7bda35e9f07a1361979659b29821e093bd5e097d61.exe
"C:\Users\Admin\AppData\Local\Temp\ad8032fb428d37013ab5eb7bda35e9f07a1361979659b29821e093bd5e097d61.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4224
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4224 -s 344
  2⤵
  - Program crash
  PID:2888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4224 -ip 4224
1⤵
PID:4200

Network

MITRE ATT&CK Enterprise v15

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/4224-0-0x00000000004BA000-0x000000000054F000-memory.dmp

Filesize
596KB

Download
memory/4224-1-0x0000000000420000-0x000000000054F000-memory.dmp

Filesize
1.2MB

Download
memory/4224-2-0x00000000004BA000-0x000000000054F000-memory.dmp

Filesize
596KB

Download