expiro | 07aca723d518a22afaabb3aec196968940a2fd2d170744782ef9c732afeb8b4a

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05-01-2025 04:57

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General

Target

JaffaCakes118_8cdeacf36906d8b09d78dbc96804d0e2.exe
Size

7.3MB
MD5

8cdeacf36906d8b09d78dbc96804d0e2
SHA1

16dc3178c7ec5971ff5b7f40ea725f3a259e2dda
SHA256

07aca723d518a22afaabb3aec196968940a2fd2d170744782ef9c732afeb8b4a
SHA512

30aeef03a731ac7bb7f93adec3b89da0370cc041383e51761ef7a7c70aa369776d2a42244a3c0c2352d98f92c262ecb92b67b87d9779b63b43074ede3ad6e71c
SSDEEP

98304:/xC3ud6MOIvysiwCQKzo5qphIHVruP3WpF3UdE1hZHEdLFzmil+:UGQFMkhgJuP32+dmhZk/t

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/2380-0-0x0000000000AAE000-0x0000000000B41000-memory.dmp	family_expiro1
behavioral1/memory/2380-1-0x0000000000360000-0x0000000000B41000-memory.dmp	family_expiro1
behavioral1/memory/2380-2-0x0000000000AAE000-0x0000000000B41000-memory.dmp	family_expiro1
behavioral1/memory/2380-3-0x0000000000360000-0x0000000000B41000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2128	2380	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_8cdeacf36906d8b09d78dbc96804d0e2.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2128	2380	JaffaCakes118_8cdeacf36906d8b09d78dbc96804d0e2.exe	30
PID 2380 wrote to memory of 2128	2380	JaffaCakes118_8cdeacf36906d8b09d78dbc96804d0e2.exe	30
PID 2380 wrote to memory of 2128	2380	JaffaCakes118_8cdeacf36906d8b09d78dbc96804d0e2.exe	30
PID 2380 wrote to memory of 2128	2380	JaffaCakes118_8cdeacf36906d8b09d78dbc96804d0e2.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8cdeacf36906d8b09d78dbc96804d0e2.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8cdeacf36906d8b09d78dbc96804d0e2.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 156
  2⤵
  - Program crash
  PID:2128

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/2380-0-0x0000000000AAE000-0x0000000000B41000-memory.dmp

Filesize
588KB

Download
memory/2380-1-0x0000000000360000-0x0000000000B41000-memory.dmp

Filesize
7.9MB

Download
memory/2380-2-0x0000000000AAE000-0x0000000000B41000-memory.dmp

Filesize
588KB

Download
memory/2380-3-0x0000000000360000-0x0000000000B41000-memory.dmp

Filesize
7.9MB

Download