expiro | 0ac9afa1e6cc9352964fc71be2cb1cbf60c4965d81248d5a9125aed3907e7c85

Analysis

max time kernel
117s
max time network
117s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 13:14

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General

Target

JaffaCakes118_1dcf14803818a81feff7cc7945f911b5.exe
Size

738KB
MD5

1dcf14803818a81feff7cc7945f911b5
SHA1

e31aa299cefc9ad2ba04f177766c1b5776725df0
SHA256

0ac9afa1e6cc9352964fc71be2cb1cbf60c4965d81248d5a9125aed3907e7c85
SHA512

4f88e94bf13be49cc7ca12a200f773a4fa24326c75b45ca50cb601d8d4456a60e972c143a98186c4feef3f8ec547444e77f18e729cc4333de69bebd667270f8c
SSDEEP

12288:9AwSfxL/2Dc3jDLLmt0LDQewsHjhWW1d9cqO0qIlp7+x9xhIS2:uGewsHjoW1d9ciNa98

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/2800-0-0x000000000033F000-0x00000000003D2000-memory.dmp	family_expiro1
behavioral1/memory/2800-1-0x0000000000280000-0x00000000003D2000-memory.dmp	family_expiro1
behavioral1/memory/2800-2-0x000000000033F000-0x00000000003D2000-memory.dmp	family_expiro1
behavioral1/memory/2800-3-0x0000000000280000-0x00000000003D2000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2432	2800	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_1dcf14803818a81feff7cc7945f911b5.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 2432	2800	JaffaCakes118_1dcf14803818a81feff7cc7945f911b5.exe	30
PID 2800 wrote to memory of 2432	2800	JaffaCakes118_1dcf14803818a81feff7cc7945f911b5.exe	30
PID 2800 wrote to memory of 2432	2800	JaffaCakes118_1dcf14803818a81feff7cc7945f911b5.exe	30
PID 2800 wrote to memory of 2432	2800	JaffaCakes118_1dcf14803818a81feff7cc7945f911b5.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1dcf14803818a81feff7cc7945f911b5.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1dcf14803818a81feff7cc7945f911b5.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2800 -s 124
  2⤵
  - Program crash
  PID:2432

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/2800-0-0x000000000033F000-0x00000000003D2000-memory.dmp

Filesize
588KB

Download
memory/2800-1-0x0000000000280000-0x00000000003D2000-memory.dmp

Filesize
1.3MB

Download
memory/2800-2-0x000000000033F000-0x00000000003D2000-memory.dmp

Filesize
588KB

Download
memory/2800-3-0x0000000000280000-0x00000000003D2000-memory.dmp

Filesize
1.3MB

Download