expiro | 628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6

Analysis

max time kernel
94s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-01-2025 08:05

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General

Target

JaffaCakes118_df2d7668906396625694e3cebaa3f854.exe
Size

415KB
MD5

df2d7668906396625694e3cebaa3f854
SHA1

c9f3b26a09ba5ccfedf4376d3f6743a6c1af5de1
SHA256

628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6
SHA512

e47fd4dd8d37becdd88c42e76baedbeb0531cd03d08954f3e9e46d7de5e2bd9f4744890696d1156accd009fc90e3ca296dbd0f5dea56d9bcd05b8c456dbd46ae
SSDEEP

6144:eUGcJmZatH1Mmt1GwCYjqcaKX7b4x0VNn+tGfwhyhvmL:YcbHbt1GwCNcBV+8ocM

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
behavioral2/memory/1072-0-0x000000000091B000-0x00000000009AE000-memory.dmp	family_expiro1
behavioral2/memory/1072-1-0x00000000008B0000-0x00000000009AE000-memory.dmp	family_expiro1
behavioral2/memory/1072-2-0x000000000091B000-0x00000000009AE000-memory.dmp	family_expiro1
behavioral2/memory/1072-3-0x00000000008B0000-0x00000000009AE000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1180	1072	WerFault.exe	81

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_df2d7668906396625694e3cebaa3f854.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_df2d7668906396625694e3cebaa3f854.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_df2d7668906396625694e3cebaa3f854.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1072
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1072 -s 256
  2⤵
  - Program crash
  PID:1180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1072 -ip 1072
1⤵
PID:4396

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/1072-0-0x000000000091B000-0x00000000009AE000-memory.dmp

Filesize
588KB

Download
memory/1072-1-0x00000000008B0000-0x00000000009AE000-memory.dmp

Filesize
1016KB

Download
memory/1072-2-0x000000000091B000-0x00000000009AE000-memory.dmp

Filesize
588KB

Download
memory/1072-3-0x00000000008B0000-0x00000000009AE000-memory.dmp

Filesize
1016KB

Download