expiro | 96c99c10a64d2478303b74d5ca2fd6ff26e68b6432d40f747880ad39401608c2

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
31/12/2024, 07:24

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General

Target

JaffaCakes118_0aabfc14834f17271504342db06e110b.exe
Size

476KB
MD5

0aabfc14834f17271504342db06e110b
SHA1

a858c50063efaedd41958e1954b1aea425231a24
SHA256

96c99c10a64d2478303b74d5ca2fd6ff26e68b6432d40f747880ad39401608c2
SHA512

6bf6bf7f854b57317d670a890a39ae8da0338b56c627e7c60ca0355e848b8196a4093e295343f54086effb27375ce7ac5b5f97dd70931c9b540c1fd639bf9476
SSDEEP

12288:6YmIjE7eNdKcWEb52Ubr4TgyUbZm6qCs8e/G:27eNAYb52Ub8T5geL

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/856-0-0x000000000045B000-0x00000000004EF000-memory.dmp	family_expiro1
behavioral1/memory/856-1-0x00000000003E0000-0x00000000004EF000-memory.dmp	family_expiro1
behavioral1/memory/856-2-0x000000000045B000-0x00000000004EF000-memory.dmp	family_expiro1
behavioral1/memory/856-3-0x00000000003E0000-0x00000000004EF000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2184	856	WerFault.exe	30

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_0aabfc14834f17271504342db06e110b.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 856 wrote to memory of 2184	856	JaffaCakes118_0aabfc14834f17271504342db06e110b.exe	32
PID 856 wrote to memory of 2184	856	JaffaCakes118_0aabfc14834f17271504342db06e110b.exe	32
PID 856 wrote to memory of 2184	856	JaffaCakes118_0aabfc14834f17271504342db06e110b.exe	32
PID 856 wrote to memory of 2184	856	JaffaCakes118_0aabfc14834f17271504342db06e110b.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aabfc14834f17271504342db06e110b.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0aabfc14834f17271504342db06e110b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:856
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 856 -s 144
  2⤵
  - Program crash
  PID:2184

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/856-0-0x000000000045B000-0x00000000004EF000-memory.dmp

Filesize
592KB

Download
memory/856-1-0x00000000003E0000-0x00000000004EF000-memory.dmp

Filesize
1.1MB

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memory/856-2-0x000000000045B000-0x00000000004EF000-memory.dmp

Filesize
592KB

Download
memory/856-3-0x00000000003E0000-0x00000000004EF000-memory.dmp

Filesize
1.1MB

Download