expiro | 3084dc23a5946107b94a7f4801b3207411b03fff8358bba5eb265a2cda14ac11

Analysis

max time kernel
96s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-01-2025 15:22

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General

Target

JaffaCakes118_cb925a54a65a4901339f5c079f49e2a5.exe
Size

563KB
MD5

cb925a54a65a4901339f5c079f49e2a5
SHA1

e54a0285ec13dcbd19136adf5c5a97905ec995fb
SHA256

3084dc23a5946107b94a7f4801b3207411b03fff8358bba5eb265a2cda14ac11
SHA512

886402029561bbe17de65b680d01565ef0bd4bed41e880d74902bf18c55dcfcca113081b54406d359a89fcca0b773fed945e06c7e875f1bd6b82308e4d88c4c6
SSDEEP

12288:60skIrZtZk1W+/szMD6Y4CeiVRtMbLzfTRDDR:6LrZDB+/j6Y4CeiH0VR

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 3 IoCs

backdoor

resource	yara_rule
behavioral2/memory/5112-0-0x0000000000931000-0x00000000009C5000-memory.dmp	family_expiro1
behavioral2/memory/5112-1-0x00000000008A0000-0x00000000009C5000-memory.dmp	family_expiro1
behavioral2/memory/5112-2-0x0000000000931000-0x00000000009C5000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4672	5112	WerFault.exe	84

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_cb925a54a65a4901339f5c079f49e2a5.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb925a54a65a4901339f5c079f49e2a5.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb925a54a65a4901339f5c079f49e2a5.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:5112
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5112 -s 428
  2⤵
  - Program crash
  PID:4672

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 5112 -ip 5112
1⤵
PID:3772

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/5112-0-0x0000000000931000-0x00000000009C5000-memory.dmp

Filesize
592KB

Download
memory/5112-1-0x00000000008A0000-0x00000000009C5000-memory.dmp

Filesize
1.1MB

Download
memory/5112-2-0x0000000000931000-0x00000000009C5000-memory.dmp

Filesize
592KB

Download