expiro | 337da0f9707b59fee809ff632840f51f31c3d7d25268fb0ab994d49a89d179f9

Analysis

max time kernel
94s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-01-2025 10:06

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General

Target

JaffaCakes118_7913b537a0abb790594b45e7f92bbd10.exe
Size

335KB
MD5

7913b537a0abb790594b45e7f92bbd10
SHA1

89a5ede2588081620a719927a5e6c9c81053d40a
SHA256

337da0f9707b59fee809ff632840f51f31c3d7d25268fb0ab994d49a89d179f9
SHA512

5c8d5be7c134f83a4a9ad2b6cc24b4ef94e5f9cf07c2d898029666e1b0c12ef6b0ed47ba28f04aff47aec2167dd61f92e969d4895071b02339ee1b5ee4a9b8fc
SSDEEP

6144:84co6jgW4CS35RLY+0ERNklPtn/ejOZZAmavcTC+wfsoIw8h:nc/jgW4CS35JYkRNklP0jQSCTC+wfsvf

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/2800-1-0x0000000001000000-0x000000000117A000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4948	2800	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	JaffaCakes118_7913b537a0abb790594b45e7f92bbd10.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7913b537a0abb790594b45e7f92bbd10.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7913b537a0abb790594b45e7f92bbd10.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2800 -s 332
  2⤵
  - Program crash
  PID:4948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2800 -ip 2800
1⤵
PID:3900

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

Replay Monitor

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Downloads

memory/2800-0-0x0000000001000000-0x000000000117A000-memory.dmp

Filesize
1.5MB

Download
memory/2800-1-0x0000000001000000-0x000000000117A000-memory.dmp

Filesize
1.5MB

Download