expiro | e3287bf8e94f8531d278965d9d139829032a48990a6a65016a2062e70cefe19e

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2025 18:49

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General

Target

e3287bf8e94f8531d278965d9d139829032a48990a6a65016a2062e70cefe19eN.exe
Size

1.8MB
MD5

be833ee05987c6729335b58492b5bff0
SHA1

3defa0f5161b3bb52ea7ee8f7336266a28e2b3a0
SHA256

e3287bf8e94f8531d278965d9d139829032a48990a6a65016a2062e70cefe19e
SHA512

26386590a4fae0cb9497b16d2adc64f3b38543653f440267a0d6cb4ec08ac25305754360e3f7ebe63dee37bb761fd58e386249d1a7da051ddbe051daba2ac211
SSDEEP

24576:GbJDcYm+kU3QAOTUlbM9+kU3QAOTUlbM:IDufA2WbM9fA2WbM

Score

10^/10

expiro backdoor discovery upx

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/3296-2-0x0000000001000000-0x00000000012B0000-memory.dmp	family_expiro1

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3296-0-0x0000000001000000-0x00000000012B0000-memory.dmp	upx
behavioral2/memory/3296-2-0x0000000001000000-0x00000000012B0000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3796	3296	WerFault.exe	82

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	e3287bf8e94f8531d278965d9d139829032a48990a6a65016a2062e70cefe19eN.exe

C:\Users\Admin\AppData\Local\Temp\e3287bf8e94f8531d278965d9d139829032a48990a6a65016a2062e70cefe19eN.exe
"C:\Users\Admin\AppData\Local\Temp\e3287bf8e94f8531d278965d9d139829032a48990a6a65016a2062e70cefe19eN.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3296
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3296 -s 304
  2⤵
  - Program crash
  PID:3796

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3296 -ip 3296
1⤵
PID:1860

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/3296-0-0x0000000001000000-0x00000000012B0000-memory.dmp

Filesize
2.7MB

Download
memory/3296-1-0x000000000100A000-0x000000000100B000-memory.dmp

Filesize
4KB

Download
memory/3296-2-0x0000000001000000-0x00000000012B0000-memory.dmp

Filesize
2.7MB

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