expiro | a862c38ade581e062f4db398c0046a18feddc93de149492934f81a12f6c93621

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
05-01-2025 12:35

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General

Target

JaffaCakes118_a4824621006909d7736715036a4750e9.exe
Size

417KB
MD5

a4824621006909d7736715036a4750e9
SHA1

e40aa07f45ff8a92b718fb9276073ab2015684b7
SHA256

a862c38ade581e062f4db398c0046a18feddc93de149492934f81a12f6c93621
SHA512

32e8ab72b79900cece8c01695724cf750ced8fd47a3377eaf933994623c7b2a18d4edd7723b732fc96a95d85ac54b15bbee4feabe1f82a23c2faff32cbe6502d
SSDEEP

6144:DSpwTEOzPSK5U2SoJ8VWackiV1ZmXRWLgKocUq8nOfaIROo71YvK09lw+45B:e+IK5U2SoyspmwLQcUqgsPBYv745B

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/1604-0-0x0000000000A0C000-0x0000000000A9F000-memory.dmp	family_expiro1
behavioral1/memory/1604-1-0x00000000009A0000-0x0000000000A9F000-memory.dmp	family_expiro1
behavioral1/memory/1604-2-0x0000000000A0C000-0x0000000000A9F000-memory.dmp	family_expiro1
behavioral1/memory/1604-3-0x00000000009A0000-0x0000000000A9F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2820	1604	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_a4824621006909d7736715036a4750e9.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1604 wrote to memory of 2820	1604	JaffaCakes118_a4824621006909d7736715036a4750e9.exe	30
PID 1604 wrote to memory of 2820	1604	JaffaCakes118_a4824621006909d7736715036a4750e9.exe	30
PID 1604 wrote to memory of 2820	1604	JaffaCakes118_a4824621006909d7736715036a4750e9.exe	30
PID 1604 wrote to memory of 2820	1604	JaffaCakes118_a4824621006909d7736715036a4750e9.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a4824621006909d7736715036a4750e9.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a4824621006909d7736715036a4750e9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1604 -s 68
  2⤵
  - Program crash
  PID:2820

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/1604-0-0x0000000000A0C000-0x0000000000A9F000-memory.dmp

Filesize
588KB

Download
memory/1604-1-0x00000000009A0000-0x0000000000A9F000-memory.dmp

Filesize
1020KB

Download
memory/1604-2-0x0000000000A0C000-0x0000000000A9F000-memory.dmp

Filesize
588KB

Download
memory/1604-3-0x00000000009A0000-0x0000000000A9F000-memory.dmp

Filesize
1020KB

Download