expiro | 7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-12-2024 02:12

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General

Target

7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7.exe
Size

567KB
MD5

0ea4caaae0f84e80b1d20c2de766f046
SHA1

3bba16483ce758075ffe5ede4e81699a952d552a
SHA256

7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7
SHA512

02d8194be60c58546de9b363371cd7d9bc14b0ebccfbf483c72afc1fce2cc35bbdc71807d5323cde03ed2b62349dc33d3792d2c078d77f3434a6ab4c05d77914
SSDEEP

12288:agwzKlEa58XMiOs2XK6zF924eDUeFy/NROXAqpR8djy:ZGe8XMLsS5R92JDUeE/NROQq0y

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/4680-2-0x0000000000400000-0x000000000064F000-memory.dmp	family_expiro1

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7.exe

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 2 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	7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4680 wrote to memory of 1748	4680	7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7.exe	83
PID 4680 wrote to memory of 1748	4680	7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7.exe	83
PID 4680 wrote to memory of 1748	4680	7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7.exe	83

C:\Users\Admin\AppData\Local\Temp\7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7.exe
"C:\Users\Admin\AppData\Local\Temp\7dd32adae1b33b5d3f041e723f648d883bee7485b8e48f1aec3c4ffabac00eb7.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4680
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /Delete /TN EPUpdater /F
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4680-0-0x0000000000400000-0x000000000064F000-memory.dmp

Filesize
2.3MB

Download
memory/4680-1-0x0000000000401000-0x0000000000402000-memory.dmp

Filesize
4KB

Download
memory/4680-2-0x0000000000400000-0x000000000064F000-memory.dmp

Filesize
2.3MB

Download