expiro | ab2b3469c135b2a39575e18f71f4bbd1e580f01f7ba89b1a238b772417a0297b

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07/01/2025, 19:35

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General

Target

JaffaCakes118_756b914724a5e8cf46af4d40575e4095.exe
Size

417KB
MD5

756b914724a5e8cf46af4d40575e4095
SHA1

995a2befb1f6320487036454215aac1e5e86844e
SHA256

ab2b3469c135b2a39575e18f71f4bbd1e580f01f7ba89b1a238b772417a0297b
SHA512

6394918510365c2f6c0128951d0ad211e20e3727141d672b27b765bc99b12580bc7daa6b31453b9c61429d5b5a73907d977a6348434e97e40783a09ebc83abe7
SSDEEP

6144:DSpwTEOzPSK5U2SoJ8VWackNV1ZmXRWLgKocUq8nOfaIROo71YvK09lw+45B:e+IK5U2Soys+mwLQcUqgsPBYv745B

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/372-0-0x0000000000F2C000-0x0000000000FBF000-memory.dmp	family_expiro1
behavioral1/memory/372-1-0x0000000000EC0000-0x0000000000FBF000-memory.dmp	family_expiro1
behavioral1/memory/372-2-0x0000000000F2C000-0x0000000000FBF000-memory.dmp	family_expiro1
behavioral1/memory/372-3-0x0000000000EC0000-0x0000000000FBF000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2460	372	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_756b914724a5e8cf46af4d40575e4095.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 372 wrote to memory of 2460	372	JaffaCakes118_756b914724a5e8cf46af4d40575e4095.exe	30
PID 372 wrote to memory of 2460	372	JaffaCakes118_756b914724a5e8cf46af4d40575e4095.exe	30
PID 372 wrote to memory of 2460	372	JaffaCakes118_756b914724a5e8cf46af4d40575e4095.exe	30
PID 372 wrote to memory of 2460	372	JaffaCakes118_756b914724a5e8cf46af4d40575e4095.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_756b914724a5e8cf46af4d40575e4095.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_756b914724a5e8cf46af4d40575e4095.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:372
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 372 -s 68
  2⤵
  - Program crash
  PID:2460

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/372-0-0x0000000000F2C000-0x0000000000FBF000-memory.dmp

Filesize
588KB

Download
memory/372-1-0x0000000000EC0000-0x0000000000FBF000-memory.dmp

Filesize
1020KB

Download
memory/372-2-0x0000000000F2C000-0x0000000000FBF000-memory.dmp

Filesize
588KB

Download
memory/372-3-0x0000000000EC0000-0x0000000000FBF000-memory.dmp

Filesize
1020KB

Download