expiro | 2c166140b65c699402e4df0f0a94495428688b1bb952ca90161c08ebb7bb18ef

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
22-02-2025 02:32

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General

Target

JaffaCakes118_16bc52c98f06102e41d2b257d1d58960.exe
Size

338KB
MD5

16bc52c98f06102e41d2b257d1d58960
SHA1

45a63145570b6ff27603fee75745e6f0574d2ad5
SHA256

2c166140b65c699402e4df0f0a94495428688b1bb952ca90161c08ebb7bb18ef
SHA512

46159884c8407fa0949484d537c16d8a4213afd58289d022962edc458adb54d05ec5bc886f5d8399509ffb49f97093a3703fc697036f0969295d18a4c69e5663
SSDEEP

6144:MDQ1VY7yScIRouWgixLDZspShC7Rz3TeSxia3k7cP6BLlnzjFV:MDQ1nScI+uWdxLDqp97Rzma3ky6LjF

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/4840-1-0x0000000001000000-0x00000000010A5000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1772	4840	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_16bc52c98f06102e41d2b257d1d58960.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_16bc52c98f06102e41d2b257d1d58960.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_16bc52c98f06102e41d2b257d1d58960.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4840 -s 456
  2⤵
  - Program crash
  PID:1772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4840 -ip 4840
1⤵
PID:3924

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/4840-0-0x0000000001000000-0x00000000010A5000-memory.dmp

Filesize
660KB

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memory/4840-1-0x0000000001000000-0x00000000010A5000-memory.dmp

Filesize
660KB

Download