expiro | 60dc9515c432d3b28f70e9c18dcbbef9ae41a40fd15546d31496bd1a8e3b5dbd

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 00:53

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General

Target

JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe
Size

476KB
MD5

04f6e3b3befaf89d4e98d1e9896bdec3
SHA1

1078ff39f236001c41c20c32cab1fa526666afd7
SHA256

60dc9515c432d3b28f70e9c18dcbbef9ae41a40fd15546d31496bd1a8e3b5dbd
SHA512

0bd0fae1b924ac5f7d0a86df5aed7ec5260e1299ad7b3e3d17e37005dd1248426151c1e843696ad889811641e3f03b049ffb216d99279c45f6aa6a3ff502754c
SSDEEP

12288:rYmIjE7eNdKcWEbt2Ubr4TgyUbZm6qCs8e/G:p7eNAYbt2Ub8T5geL

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
behavioral1/memory/2636-0-0x0000000000B1B000-0x0000000000BAF000-memory.dmp	family_expiro1
behavioral1/memory/2636-1-0x0000000000AA0000-0x0000000000BAF000-memory.dmp	family_expiro1
behavioral1/memory/2636-2-0x0000000000B1B000-0x0000000000BAF000-memory.dmp	family_expiro1
behavioral1/memory/2636-3-0x0000000000AA0000-0x0000000000BAF000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2796	2636	WerFault.exe	29

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_04f6e3b3befaf89d4e98d1e9896bdec3.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2636 wrote to memory of 2796	2636	JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe	31
PID 2636 wrote to memory of 2796	2636	JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe	31
PID 2636 wrote to memory of 2796	2636	JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe	31
PID 2636 wrote to memory of 2796	2636	JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_04f6e3b3befaf89d4e98d1e9896bdec3.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2636 -s 144
  2⤵
  - Program crash
  PID:2796

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/2636-0-0x0000000000B1B000-0x0000000000BAF000-memory.dmp

Filesize
592KB

Download
memory/2636-1-0x0000000000AA0000-0x0000000000BAF000-memory.dmp

Filesize
1.1MB

Download
memory/2636-2-0x0000000000B1B000-0x0000000000BAF000-memory.dmp

Filesize
592KB

Download
memory/2636-3-0x0000000000AA0000-0x0000000000BAF000-memory.dmp

Filesize
1.1MB

Download