expiro | 7a125417ab58ba53682aa2566eb8609bc484aa829c68833dbde9df5f956c55fb

Analysis

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

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
13-12-2024 03:37

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General

Target

e9b43d06504a6451a4939bbfa32385ee_JaffaCakes118.exe
Size

437KB
MD5

e9b43d06504a6451a4939bbfa32385ee
SHA1

f10e4db716cd32a47a052977b1dee6cbec8b14a4
SHA256

7a125417ab58ba53682aa2566eb8609bc484aa829c68833dbde9df5f956c55fb
SHA512

1938c341fb46519b5700550512d84be1ac553e1f5db1ab116e8e98dfc514cb29fe710bb6ef54514c2c1fa2c27b373f285ef69b12ea9e22c57e1551733f1dd559
SSDEEP

6144:UXBwm2oz8fEYga22UHHXyDArvBIM6zO73ONgEox946lzmEZYS5+oj9COdbeOut8r:NroAfEYAtHCDArvxeOGjo46hjYJQ0mN

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/2912-0-0x0000000000200000-0x0000000000294000-memory.dmp	family_expiro1
behavioral1/memory/2912-1-0x0000000000190000-0x0000000000294000-memory.dmp	family_expiro1
behavioral1/memory/2912-2-0x0000000000200000-0x0000000000294000-memory.dmp	family_expiro1
behavioral1/memory/2912-3-0x0000000000190000-0x0000000000294000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3028	2912	WerFault.exe	27

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	e9b43d06504a6451a4939bbfa32385ee_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2912 wrote to memory of 3028	2912	e9b43d06504a6451a4939bbfa32385ee_JaffaCakes118.exe	28
PID 2912 wrote to memory of 3028	2912	e9b43d06504a6451a4939bbfa32385ee_JaffaCakes118.exe	28
PID 2912 wrote to memory of 3028	2912	e9b43d06504a6451a4939bbfa32385ee_JaffaCakes118.exe	28
PID 2912 wrote to memory of 3028	2912	e9b43d06504a6451a4939bbfa32385ee_JaffaCakes118.exe	28

C:\Users\Admin\AppData\Local\Temp\e9b43d06504a6451a4939bbfa32385ee_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e9b43d06504a6451a4939bbfa32385ee_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2912
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2912 -s 160
  2⤵
  - Program crash
  PID:3028

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/2912-0-0x0000000000200000-0x0000000000294000-memory.dmp

Filesize
592KB

Download
memory/2912-1-0x0000000000190000-0x0000000000294000-memory.dmp

Filesize
1.0MB

Download
memory/2912-2-0x0000000000200000-0x0000000000294000-memory.dmp

Filesize
592KB

Download
memory/2912-3-0x0000000000190000-0x0000000000294000-memory.dmp

Filesize
1.0MB

Download