expiro | 348c9c6415776e4747212e28064950a147fb4ca38f397b2936027a6847861b17

Analysis

max time kernel
95s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2025 03:36

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General

Target

JaffaCakes118_45bf7d2e1d23ac93ff391040777f8277.exe
Size

816KB
MD5

45bf7d2e1d23ac93ff391040777f8277
SHA1

7835c0da43136b806a8c14347de22d50462082a5
SHA256

348c9c6415776e4747212e28064950a147fb4ca38f397b2936027a6847861b17
SHA512

f3d943034544d1b1f3ee94edbce7d7db2c1e2c3f9f3b74c6e2ab9369daa57bf1b2dc86748a76f57e953f9bbcbdeb98c82fd13617e269853da38863f9e721da2b
SSDEEP

24576:FJW2KjJ4Td3kJnbsPhnzq6FpMuFc1xj4AUqSf:FInJ4Td3mbsPhne6FpPUf

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/4868-0-0x000000000039F000-0x0000000000432000-memory.dmp	family_expiro1
behavioral1/memory/4868-1-0x00000000002D0000-0x0000000000432000-memory.dmp	family_expiro1
behavioral1/memory/4868-2-0x000000000039F000-0x0000000000432000-memory.dmp	family_expiro1
behavioral1/memory/4868-3-0x00000000002D0000-0x0000000000432000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4332	4868	WerFault.exe	82

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_45bf7d2e1d23ac93ff391040777f8277.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_45bf7d2e1d23ac93ff391040777f8277.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_45bf7d2e1d23ac93ff391040777f8277.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:4868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4868 -s 400
  2⤵
  - Program crash
  PID:4332

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4868 -ip 4868
1⤵
PID:2416

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/4868-0-0x000000000039F000-0x0000000000432000-memory.dmp

Filesize
588KB

Download
memory/4868-1-0x00000000002D0000-0x0000000000432000-memory.dmp

Filesize
1.4MB

Download
memory/4868-2-0x000000000039F000-0x0000000000432000-memory.dmp

Filesize
588KB

Download
memory/4868-3-0x00000000002D0000-0x0000000000432000-memory.dmp

Filesize
1.4MB

Download