expiro | 28750a60e71fd34fcf98fc6a7cbfe4e7dad6419195c3527dbbb09355b82a3f55

Analysis

max time kernel
103s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2025, 03:43

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General

Target

JaffaCakes118_b948d308b566477aeed7497fa81f89b2.exe
Size

228KB
MD5

b948d308b566477aeed7497fa81f89b2
SHA1

1f76e29caf37e00f8ac7df031c5b6af868c4a39b
SHA256

28750a60e71fd34fcf98fc6a7cbfe4e7dad6419195c3527dbbb09355b82a3f55
SHA512

d9bb7a599f174e2dc38d0c70dfec1da287ae7b76e3a4df934c70db67ca37a70435c85d072373e6918b5340fdad587cc2aa8eac841f9fdb6d2224b6ad1791b5a7
SSDEEP

6144:1ye7U172dN5uuIVSDPSS3EB8qfT9zcz+JJuUT:1A85QkPSSLqLl4zg

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
behavioral1/memory/5540-1-0x0000000001000000-0x0000000001088000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3924	5540	WerFault.exe	83

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_b948d308b566477aeed7497fa81f89b2.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b948d308b566477aeed7497fa81f89b2.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b948d308b566477aeed7497fa81f89b2.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:5540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5540 -s 264
  2⤵
  - Program crash
  PID:3924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 5540 -ip 5540
1⤵
PID:5812

Network

MITRE ATT&CK Enterprise v16

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/5540-0-0x0000000001000000-0x0000000001088000-memory.dmp

Filesize
544KB

Download
memory/5540-1-0x0000000001000000-0x0000000001088000-memory.dmp

Filesize
544KB

Download