expiro | 4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
05-01-2025 14:50

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General

Target

JaffaCakes118_ab82eeb4d0bfc29e266388cc4c2d372b.exe
Size

411KB
MD5

ab82eeb4d0bfc29e266388cc4c2d372b
SHA1

836976baba2cba88f4a4c1238b22a466dbebea4a
SHA256

4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4
SHA512

987b8634a5ac0fc6234ee10b5b437bff3450e6f473afcfa2c17c41df6d2241765e8813076a699aaa22bd58a00493b4d7b9008b5a96b1c12fe82120c1983605d1
SSDEEP

12288:JetLagza/unbxptENWXkVTTM5ct0bDMT:JettMMbxpSNMk12c20T

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/2424-0-0x0000000000C6B000-0x0000000000CFE000-memory.dmp	family_expiro1
behavioral1/memory/2424-1-0x0000000000C00000-0x0000000000CFE000-memory.dmp	family_expiro1
behavioral1/memory/2424-2-0x0000000000C6B000-0x0000000000CFE000-memory.dmp	family_expiro1
behavioral1/memory/2424-3-0x0000000000C00000-0x0000000000CFE000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2932	2424	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_ab82eeb4d0bfc29e266388cc4c2d372b.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2424 wrote to memory of 2932	2424	JaffaCakes118_ab82eeb4d0bfc29e266388cc4c2d372b.exe	30
PID 2424 wrote to memory of 2932	2424	JaffaCakes118_ab82eeb4d0bfc29e266388cc4c2d372b.exe	30
PID 2424 wrote to memory of 2932	2424	JaffaCakes118_ab82eeb4d0bfc29e266388cc4c2d372b.exe	30
PID 2424 wrote to memory of 2932	2424	JaffaCakes118_ab82eeb4d0bfc29e266388cc4c2d372b.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ab82eeb4d0bfc29e266388cc4c2d372b.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ab82eeb4d0bfc29e266388cc4c2d372b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2424 -s 96
  2⤵
  - Program crash
  PID:2932

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/2424-0-0x0000000000C6B000-0x0000000000CFE000-memory.dmp

Filesize
588KB

Download
memory/2424-1-0x0000000000C00000-0x0000000000CFE000-memory.dmp

Filesize
1016KB

Download
memory/2424-2-0x0000000000C6B000-0x0000000000CFE000-memory.dmp

Filesize
588KB

Download
memory/2424-3-0x0000000000C00000-0x0000000000CFE000-memory.dmp

Filesize
1016KB

Download