expiro | b2da6e56ae7c16b232d50db4444548871b1afa4c85a7077da48c5c1da5230f3d

Analysis

max time kernel
92s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-12-2024 00:22

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General

Target

b2da6e56ae7c16b232d50db4444548871b1afa4c85a7077da48c5c1da5230f3d.exe
Size

7.3MB
MD5

d80bdd3b9cf78abf9f897549ac6d584d
SHA1

3b47134227c19819aea623a0840e7708356878b4
SHA256

b2da6e56ae7c16b232d50db4444548871b1afa4c85a7077da48c5c1da5230f3d
SHA512

15b197c0d6ebfe286746b90552519bb9895da4af99db0f3b9e0a6704960ef9b23d2b8a3284e0e9207d480bb17a505c778f242ff265b1c460ae7d670318b2ad48
SSDEEP

98304:vxC3ud6MOIvysi7CQKzo5qphIHVruP3WpF3UdE1hZHEdLF003:EGQgMkhgJuP32+dmhZk/0s

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 4 IoCs

backdoor

resource	yara_rule
behavioral2/memory/1656-0-0x00000000016BE000-0x0000000001751000-memory.dmp	family_expiro1
behavioral2/memory/1656-1-0x0000000000F70000-0x0000000001751000-memory.dmp	family_expiro1
behavioral2/memory/1656-3-0x0000000000F70000-0x0000000001751000-memory.dmp	family_expiro1
behavioral2/memory/1656-2-0x00000000016BE000-0x0000000001751000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1268	1656	WerFault.exe	80

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	b2da6e56ae7c16b232d50db4444548871b1afa4c85a7077da48c5c1da5230f3d.exe

C:\Users\Admin\AppData\Local\Temp\b2da6e56ae7c16b232d50db4444548871b1afa4c85a7077da48c5c1da5230f3d.exe
"C:\Users\Admin\AppData\Local\Temp\b2da6e56ae7c16b232d50db4444548871b1afa4c85a7077da48c5c1da5230f3d.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1656
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 428
  2⤵
  - Program crash
  PID:1268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1656 -ip 1656
1⤵
PID:448

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/1656-0-0x00000000016BE000-0x0000000001751000-memory.dmp

Filesize
588KB

Download
memory/1656-1-0x0000000000F70000-0x0000000001751000-memory.dmp

Filesize
7.9MB

Download
memory/1656-3-0x0000000000F70000-0x0000000001751000-memory.dmp

Filesize
7.9MB

Download
memory/1656-2-0x00000000016BE000-0x0000000001751000-memory.dmp

Filesize
588KB

Download