expiro | 7afcd8e8a198bb165f1221c5cd226df5d7c11fadd7cb325587e35009c403dd6f

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 01:42

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General

Target

JaffaCakes118_072e1c31870a6380e3923b73fb4fd963.exe
Size

417KB
MD5

072e1c31870a6380e3923b73fb4fd963
SHA1

720d924daa09b95ecc41b81015d432a07e40172e
SHA256

7afcd8e8a198bb165f1221c5cd226df5d7c11fadd7cb325587e35009c403dd6f
SHA512

0976395611b794f70e48aad8b708517423242f186ea38f5adaa9f4b3550775af0c652cb28d5b6728d7f3d1dc1193098da383242ff5491556723e8d1650510ce2
SSDEEP

12288:R+9pn/82zaW9kp2tSXYwYFmD0/fMGuRqEtlaFw+9uTE:R+H/82AAclImiuRqEmwAuT

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/3060-0-0x0000000000DDC000-0x0000000000E6F000-memory.dmp	family_expiro1
behavioral1/memory/3060-1-0x0000000000D70000-0x0000000000E6F000-memory.dmp	family_expiro1
behavioral1/memory/3060-2-0x0000000000DDC000-0x0000000000E6F000-memory.dmp	family_expiro1
behavioral1/memory/3060-3-0x0000000000D70000-0x0000000000E6F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2372	3060	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_072e1c31870a6380e3923b73fb4fd963.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 2372	3060	JaffaCakes118_072e1c31870a6380e3923b73fb4fd963.exe	30
PID 3060 wrote to memory of 2372	3060	JaffaCakes118_072e1c31870a6380e3923b73fb4fd963.exe	30
PID 3060 wrote to memory of 2372	3060	JaffaCakes118_072e1c31870a6380e3923b73fb4fd963.exe	30
PID 3060 wrote to memory of 2372	3060	JaffaCakes118_072e1c31870a6380e3923b73fb4fd963.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_072e1c31870a6380e3923b73fb4fd963.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_072e1c31870a6380e3923b73fb4fd963.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3060 -s 68
  2⤵
  - Program crash
  PID:2372

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/3060-0-0x0000000000DDC000-0x0000000000E6F000-memory.dmp

Filesize
588KB

Download
memory/3060-1-0x0000000000D70000-0x0000000000E6F000-memory.dmp

Filesize
1020KB

Download
memory/3060-2-0x0000000000DDC000-0x0000000000E6F000-memory.dmp

Filesize
588KB

Download
memory/3060-3-0x0000000000D70000-0x0000000000E6F000-memory.dmp

Filesize
1020KB

Download