expiro | cc814e466397992ee0c5557c563a046d803a188ca1a8ef946566d10f0e00ca21

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-01-2025 13:03

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General

Target

JaffaCakes118_6471057bb77ca38e610d70587fe00ebd.exe
Size

437KB
MD5

6471057bb77ca38e610d70587fe00ebd
SHA1

bf5acd0bf05629ad8a7052e8aa60a317814ca638
SHA256

cc814e466397992ee0c5557c563a046d803a188ca1a8ef946566d10f0e00ca21
SHA512

2dbf8012e83f6d256b8860148558b43df1783a09aa654f6aed17216145128ae2921f13d9e7ef014da64e1630acc31dc08219f5b3a1bd3b80076f268d8ed85326
SSDEEP

6144:UYVwm2i+mKaN68U8Wdvym8fXZkK/L07IkX/c6MVO4zXUdn1NwBLDmFBF3UN:Yri+m/A4Wx3Ur/LzARMVO4sNyDm3F3U

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/2024-0-0x0000000000C30000-0x0000000000CC4000-memory.dmp	family_expiro1
behavioral2/memory/2024-1-0x0000000000BC0000-0x0000000000CC4000-memory.dmp	family_expiro1
behavioral2/memory/2024-2-0x0000000000C30000-0x0000000000CC4000-memory.dmp	family_expiro1
behavioral2/memory/2024-3-0x0000000000BC0000-0x0000000000CC4000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3280	2024	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_6471057bb77ca38e610d70587fe00ebd.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6471057bb77ca38e610d70587fe00ebd.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6471057bb77ca38e610d70587fe00ebd.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2024
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2024 -s 480
  2⤵
  - Program crash
  PID:3280

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 376 -p 2024 -ip 2024
1⤵
PID:3780

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/2024-0-0x0000000000C30000-0x0000000000CC4000-memory.dmp

Filesize
592KB

Download
memory/2024-1-0x0000000000BC0000-0x0000000000CC4000-memory.dmp

Filesize
1.0MB

Download
memory/2024-2-0x0000000000C30000-0x0000000000CC4000-memory.dmp

Filesize
592KB

Download
memory/2024-3-0x0000000000BC0000-0x0000000000CC4000-memory.dmp

Filesize
1.0MB

Download