expiro | 8acaf014d3d6443f4dd5ed4abfe2b8ab45b6e500b31706cf88f3897865a0ed1b

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
08-01-2025 03:38

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General

Target

JaffaCakes118_892950032a1be5aa425a649450ea946e.exe
Size

476KB
MD5

892950032a1be5aa425a649450ea946e
SHA1

8f40032e608c029092fada5c944a9eab35d051fc
SHA256

8acaf014d3d6443f4dd5ed4abfe2b8ab45b6e500b31706cf88f3897865a0ed1b
SHA512

ac4177929f22e89c3c52a47a2eddef71d6c293e43f00881e41ef5baefe1279daca3d8210ea8eb294b2c04bd3fa25d94e0d8ffd539a90f63c9496d4a9d28fad3b
SSDEEP

12288:9YmIjE7eNdKcWEbk2Ubr4TgyUbZm6qCs8e/G:X7eNAYbk2Ub8T5geL

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/1452-0-0x0000000000F6B000-0x0000000000FFF000-memory.dmp	family_expiro1
behavioral1/memory/1452-1-0x0000000000EF0000-0x0000000000FFF000-memory.dmp	family_expiro1
behavioral1/memory/1452-2-0x0000000000F6B000-0x0000000000FFF000-memory.dmp	family_expiro1
behavioral1/memory/1452-3-0x0000000000EF0000-0x0000000000FFF000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1328	1452	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_892950032a1be5aa425a649450ea946e.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 1328	1452	JaffaCakes118_892950032a1be5aa425a649450ea946e.exe	31
PID 1452 wrote to memory of 1328	1452	JaffaCakes118_892950032a1be5aa425a649450ea946e.exe	31
PID 1452 wrote to memory of 1328	1452	JaffaCakes118_892950032a1be5aa425a649450ea946e.exe	31
PID 1452 wrote to memory of 1328	1452	JaffaCakes118_892950032a1be5aa425a649450ea946e.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_892950032a1be5aa425a649450ea946e.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_892950032a1be5aa425a649450ea946e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1452 -s 144
  2⤵
  - Program crash
  PID:1328

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/1452-0-0x0000000000F6B000-0x0000000000FFF000-memory.dmp

Filesize
592KB

Download
memory/1452-1-0x0000000000EF0000-0x0000000000FFF000-memory.dmp

Filesize
1.1MB

Download
memory/1452-2-0x0000000000F6B000-0x0000000000FFF000-memory.dmp

Filesize
592KB

Download
memory/1452-3-0x0000000000EF0000-0x0000000000FFF000-memory.dmp

Filesize
1.1MB

Download