expiro | cf9906f609ca8c88645b2e199dd0f22c038954797f9d8bc51d381d12594a0608

Analysis

max time kernel
96s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-01-2025 10:19

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General

Target

JaffaCakes118_9d3ac8d73badfd9551ae4e271dc334f7.exe
Size

563KB
MD5

9d3ac8d73badfd9551ae4e271dc334f7
SHA1

db3fc4c647d1335de780582c6fafa97c04343505
SHA256

cf9906f609ca8c88645b2e199dd0f22c038954797f9d8bc51d381d12594a0608
SHA512

4e8b9ae9bb87bebe95e5f3467ab42591cd36ff965be4738669b9250725ae64d131e60a57e7e9bc084eb58e47e9a0e1386659d928a41f1be5e782efbe4212feb5
SSDEEP

12288:d0skIrZtZk1W+/sz6K1J7Zx8Xx2kRvtWJ7/:dLrZDB+/tqZxKxcJ

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 3 IoCs

backdoor

resource	yara_rule
behavioral2/memory/1696-0-0x0000000000681000-0x0000000000715000-memory.dmp	family_expiro1
behavioral2/memory/1696-1-0x00000000005F0000-0x0000000000715000-memory.dmp	family_expiro1
behavioral2/memory/1696-2-0x0000000000681000-0x0000000000715000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2320	1696	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_9d3ac8d73badfd9551ae4e271dc334f7.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_9d3ac8d73badfd9551ae4e271dc334f7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_9d3ac8d73badfd9551ae4e271dc334f7.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1696 -s 424
  2⤵
  - Program crash
  PID:2320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1696 -ip 1696
1⤵
PID:3604

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/1696-0-0x0000000000681000-0x0000000000715000-memory.dmp

Filesize
592KB

Download
memory/1696-1-0x00000000005F0000-0x0000000000715000-memory.dmp

Filesize
1.1MB

Download
memory/1696-2-0x0000000000681000-0x0000000000715000-memory.dmp

Filesize
592KB

Download