expiro | 352de7a343d88ad526b090593733b10c5ab597a26046052b91ebf3d547de5236

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 13:44

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General

Target

JaffaCakes118_1f799f42fbfdfb6859673ce35ac491c1.exe
Size

738KB
MD5

1f799f42fbfdfb6859673ce35ac491c1
SHA1

305d0e008c79829898cfc23fc20183b7bfc0d47d
SHA256

352de7a343d88ad526b090593733b10c5ab597a26046052b91ebf3d547de5236
SHA512

292912750aef5711c9a0ac6840bc61a6011e154001d319594c9b59d7989aebaf9b091a4566047b5e4c4e3c1d52727e2c3ed91769c05799d848e7dd5c90c446f8
SSDEEP

12288:VAwSfxL/2Dc3jDLLmt0LDQewsHjhWW1d9cQO0qIlp7+x9xhIS2:2GewsHjoW1d9cENa98

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/2172-0-0x0000000000E5F000-0x0000000000EF2000-memory.dmp	family_expiro1
behavioral1/memory/2172-1-0x0000000000DA0000-0x0000000000EF2000-memory.dmp	family_expiro1
behavioral1/memory/2172-2-0x0000000000E5F000-0x0000000000EF2000-memory.dmp	family_expiro1
behavioral1/memory/2172-3-0x0000000000DA0000-0x0000000000EF2000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2520	2172	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_1f799f42fbfdfb6859673ce35ac491c1.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2520	2172	JaffaCakes118_1f799f42fbfdfb6859673ce35ac491c1.exe	30
PID 2172 wrote to memory of 2520	2172	JaffaCakes118_1f799f42fbfdfb6859673ce35ac491c1.exe	30
PID 2172 wrote to memory of 2520	2172	JaffaCakes118_1f799f42fbfdfb6859673ce35ac491c1.exe	30
PID 2172 wrote to memory of 2520	2172	JaffaCakes118_1f799f42fbfdfb6859673ce35ac491c1.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1f799f42fbfdfb6859673ce35ac491c1.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1f799f42fbfdfb6859673ce35ac491c1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2172 -s 124
  2⤵
  - Program crash
  PID:2520

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/2172-0-0x0000000000E5F000-0x0000000000EF2000-memory.dmp

Filesize
588KB

Download
memory/2172-1-0x0000000000DA0000-0x0000000000EF2000-memory.dmp

Filesize
1.3MB

Download
memory/2172-2-0x0000000000E5F000-0x0000000000EF2000-memory.dmp

Filesize
588KB

Download
memory/2172-3-0x0000000000DA0000-0x0000000000EF2000-memory.dmp

Filesize
1.3MB

Download