expiro | a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad

Analysis

max time kernel
120s
max time network
127s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
08-02-2025 15:49

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General

Target

a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad.exe
Size

1.9MB
MD5

edb836a9e67e323fe3581101f68e009e
SHA1

f7e7daa690efdd57ab9b5730273af125fb430337
SHA256

a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad
SHA512

879817910957de023365a6d674980e48823cdbe2bdea24b5b8ddcc367b47368791517fc0942fd25dd7477895d3fcd75feb1f4851704d5397b81b6ddf5014cc02
SSDEEP

49152:v0ZWI+llRK7lC1oClOQZFcY161tVeNIcTr6wtRPGsuK5BY:cUVaYNsnVRERPl56

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
behavioral1/memory/2736-0-0x0000000000508000-0x000000000059C000-memory.dmp	family_expiro1
behavioral1/memory/2736-1-0x0000000000320000-0x000000000059C000-memory.dmp	family_expiro1
behavioral1/memory/2736-2-0x0000000000508000-0x000000000059C000-memory.dmp	family_expiro1
behavioral1/memory/2736-3-0x0000000000320000-0x000000000059C000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1760	2736	WerFault.exe	29

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	a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 1760	2736	a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad.exe	30
PID 2736 wrote to memory of 1760	2736	a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad.exe	30
PID 2736 wrote to memory of 1760	2736	a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad.exe	30
PID 2736 wrote to memory of 1760	2736	a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad.exe	30

C:\Users\Admin\AppData\Local\Temp\a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad.exe
"C:\Users\Admin\AppData\Local\Temp\a68e93bba8097cb95f7139ba26d9e9250f7e7cae93ec7527ea484cad87a0ffad.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2736 -s 248
  2⤵
  - Program crash
  PID:1760

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/2736-0-0x0000000000508000-0x000000000059C000-memory.dmp

Filesize
592KB

Download
memory/2736-1-0x0000000000320000-0x000000000059C000-memory.dmp

Filesize
2.5MB

Download
memory/2736-2-0x0000000000508000-0x000000000059C000-memory.dmp

Filesize
592KB

Download
memory/2736-3-0x0000000000320000-0x000000000059C000-memory.dmp

Filesize
2.5MB

Download