expiro | 54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6

Analysis

max time kernel
14s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
10-01-2025 21:15

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General

Target

JaffaCakes118_ee7da429fe5ec4209b01cfcc8d867cfa.exe
Size

738KB
MD5

ee7da429fe5ec4209b01cfcc8d867cfa
SHA1

4640a48f371eb4c8870d5d230f696793bab7ef12
SHA256

54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6
SHA512

9bd8e426d89facb295a86d61f6a6238a40148a9adac5e9212bd6157f8626ffb29856aedb67a6f51743d637f31d15f102abb9f90b67a25fb9c4faa47914bc461b
SSDEEP

12288:lAwSfxL/2Dc3jDLLmt0LDQewsHjhWW1d9cMO0qIlp7+x9xhIS2:GGewsHjoW1d9cwNa98

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/2248-0-0x000000000036F000-0x0000000000402000-memory.dmp	family_expiro1
behavioral1/memory/2248-1-0x00000000002B0000-0x0000000000402000-memory.dmp	family_expiro1
behavioral1/memory/2248-2-0x000000000036F000-0x0000000000402000-memory.dmp	family_expiro1
behavioral1/memory/2248-3-0x00000000002B0000-0x0000000000402000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2216	2248	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_ee7da429fe5ec4209b01cfcc8d867cfa.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2248 wrote to memory of 2216	2248	JaffaCakes118_ee7da429fe5ec4209b01cfcc8d867cfa.exe	30
PID 2248 wrote to memory of 2216	2248	JaffaCakes118_ee7da429fe5ec4209b01cfcc8d867cfa.exe	30
PID 2248 wrote to memory of 2216	2248	JaffaCakes118_ee7da429fe5ec4209b01cfcc8d867cfa.exe	30
PID 2248 wrote to memory of 2216	2248	JaffaCakes118_ee7da429fe5ec4209b01cfcc8d867cfa.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ee7da429fe5ec4209b01cfcc8d867cfa.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ee7da429fe5ec4209b01cfcc8d867cfa.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 124
  2⤵
  - Program crash
  PID:2216

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/2248-0-0x000000000036F000-0x0000000000402000-memory.dmp

Filesize
588KB

Download
memory/2248-1-0x00000000002B0000-0x0000000000402000-memory.dmp

Filesize
1.3MB

Download
memory/2248-2-0x000000000036F000-0x0000000000402000-memory.dmp

Filesize
588KB

Download
memory/2248-3-0x00000000002B0000-0x0000000000402000-memory.dmp

Filesize
1.3MB

Download