expiro | eb4af1f4264d899d139df9185f8577a593acf705c96fb94dffe18bf23c82ffc6

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
09-01-2025 06:44

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General

Target

JaffaCakes118_c182ab3b243990cda41f80111175088b.exe
Size

411KB
MD5

c182ab3b243990cda41f80111175088b
SHA1

2cb185ee1a903d2cc9faa4a106614002f076a2c4
SHA256

eb4af1f4264d899d139df9185f8577a593acf705c96fb94dffe18bf23c82ffc6
SHA512

644b0252b1f5614762ee196deea1b79f7fba2aa8c3dc228797789b87999f011b5d99edb70f7da2aee24abd205adcb90efbcdb4c167803acc664ee1445d6e3e63
SSDEEP

12288:AetLagza/unbxptBNWXkVTTM5ct0bDMT:AettMMbxprNMk12c20T

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/2284-0-0x000000000087B000-0x000000000090E000-memory.dmp	family_expiro1
behavioral1/memory/2284-1-0x0000000000810000-0x000000000090E000-memory.dmp	family_expiro1
behavioral1/memory/2284-2-0x000000000087B000-0x000000000090E000-memory.dmp	family_expiro1
behavioral1/memory/2284-3-0x0000000000810000-0x000000000090E000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2296	2284	WerFault.exe	27

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_c182ab3b243990cda41f80111175088b.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2296	2284	JaffaCakes118_c182ab3b243990cda41f80111175088b.exe	28
PID 2284 wrote to memory of 2296	2284	JaffaCakes118_c182ab3b243990cda41f80111175088b.exe	28
PID 2284 wrote to memory of 2296	2284	JaffaCakes118_c182ab3b243990cda41f80111175088b.exe	28
PID 2284 wrote to memory of 2296	2284	JaffaCakes118_c182ab3b243990cda41f80111175088b.exe	28

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c182ab3b243990cda41f80111175088b.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c182ab3b243990cda41f80111175088b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2284 -s 96
  2⤵
  - Program crash
  PID:2296

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/2284-0-0x000000000087B000-0x000000000090E000-memory.dmp

Filesize
588KB

Download
memory/2284-1-0x0000000000810000-0x000000000090E000-memory.dmp

Filesize
1016KB

Download
memory/2284-2-0x000000000087B000-0x000000000090E000-memory.dmp

Filesize
588KB

Download
memory/2284-3-0x0000000000810000-0x000000000090E000-memory.dmp

Filesize
1016KB

Download