expiro | 6e6303664d5ae0ae56349425076e4ca8bd13d2d9b581cbcff0840be76dde3f86

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-01-2025 13:12

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General

Target

JaffaCakes118_79de87ddeb557ac099b57aa413196260.exe
Size

225KB
MD5

79de87ddeb557ac099b57aa413196260
SHA1

785d0626b5b30bc60640b818441049c714cbe864
SHA256

6e6303664d5ae0ae56349425076e4ca8bd13d2d9b581cbcff0840be76dde3f86
SHA512

666eb0ba600d4c5ac714773297f25bdf330b518ff789c009004bce8c4031b876720a102a2ffe208c1e2bac0909a4ff5f002b5763f1d6aa34ba2a2012f07bb2eb
SSDEEP

3072:bywpSkrPPTEh07/YE4c9pwvGBYNHgcCfOnCKdggXRBOfI27B1hkVnYY4kmfI/nbW:2w0APr9jfmhg72rggBEdB1hMlHfUh

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 1 IoCs

backdoor

resource	yara_rule
behavioral2/memory/1056-1-0x0000000001000000-0x0000000001087000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4528	1056	WerFault.exe	81

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_79de87ddeb557ac099b57aa413196260.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_79de87ddeb557ac099b57aa413196260.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_79de87ddeb557ac099b57aa413196260.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1056 -s 432
  2⤵
  - Program crash
  PID:4528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1056 -ip 1056
1⤵
PID:5112

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

Replay Monitor

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Downloads

memory/1056-0-0x0000000001000000-0x0000000001087000-memory.dmp

Filesize
540KB

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memory/1056-1-0x0000000001000000-0x0000000001087000-memory.dmp

Filesize
540KB

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