expiro | d39241c692b5f612e9ccb11119fa3cdd3e4076170bac9ed929925116edfc135f

Analysis

max time kernel
81s
max time network
20s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
09/09/2024, 05:00

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

d5b0d98e788fdede4ad2472a18b4d508_JaffaCakes118.exe
Size

7.3MB
MD5

d5b0d98e788fdede4ad2472a18b4d508
SHA1

4644d73f4509794996078c6652b9bd3f1e0667f4
SHA256

d39241c692b5f612e9ccb11119fa3cdd3e4076170bac9ed929925116edfc135f
SHA512

97db6e0b1ab033db205570f07e0a3fdec3bd8099d6531a042dba4926d9037b58ef750d84a66476d07f2ff02227e51b1b596efab2af71586976c19e6770457ed3
SSDEEP

98304:pxC3ud6MOIvysiwCQKzo5qphIHVruP3WpF3UdE1hZHEdLFwmil+:uGQFMkhgJuP32+dmhZk/m

Score

10^/10

expiro backdoor discovery

Malware Config

Signatures

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/2208-0-0x00000000014DE000-0x0000000001571000-memory.dmp	family_expiro1
behavioral1/memory/2208-1-0x0000000000D90000-0x0000000001571000-memory.dmp	family_expiro1
behavioral1/memory/2208-2-0x00000000014DE000-0x0000000001571000-memory.dmp	family_expiro1
behavioral1/memory/2208-3-0x0000000000D90000-0x0000000001571000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2816	2208	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	d5b0d98e788fdede4ad2472a18b4d508_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 2816	2208	d5b0d98e788fdede4ad2472a18b4d508_JaffaCakes118.exe	30
PID 2208 wrote to memory of 2816	2208	d5b0d98e788fdede4ad2472a18b4d508_JaffaCakes118.exe	30
PID 2208 wrote to memory of 2816	2208	d5b0d98e788fdede4ad2472a18b4d508_JaffaCakes118.exe	30
PID 2208 wrote to memory of 2816	2208	d5b0d98e788fdede4ad2472a18b4d508_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\d5b0d98e788fdede4ad2472a18b4d508_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d5b0d98e788fdede4ad2472a18b4d508_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2208 -s 156
  2⤵
  - Program crash
  PID:2816

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

Loading Replay Monitor...

Downloads

memory/2208-0-0x00000000014DE000-0x0000000001571000-memory.dmp

Filesize
588KB

Download
memory/2208-1-0x0000000000D90000-0x0000000001571000-memory.dmp

Filesize
7.9MB

Download
memory/2208-2-0x00000000014DE000-0x0000000001571000-memory.dmp

Filesize
588KB

Download
memory/2208-3-0x0000000000D90000-0x0000000001571000-memory.dmp

Filesize
7.9MB

Download