expiro | 247cc53ff60471fc20e4e33daf2963f30861d48c935b96520e707e7146395388

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
10-01-2025 20:58

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General

Target

JaffaCakes118_ee1b91e21168a161a7fabe448d398d94.exe
Size

415KB
MD5

ee1b91e21168a161a7fabe448d398d94
SHA1

1e9342b38242f3e7bfff8f2b1343d7c16b7ea959
SHA256

247cc53ff60471fc20e4e33daf2963f30861d48c935b96520e707e7146395388
SHA512

c142ed7c2913b5248d7db1560900572f9540a06953bca6036065e6452318f71c8dcea02f0232b2523efa72bf64810965c87ed4baa8db3270d25c1833d765c149
SSDEEP

6144:bC9UUc/TN8+DkEmL2JUiBsWgT49s+yEA1BfHbv5qKY4JK19k0C:W9ZYm+AEmLa0T4CEAfldXJyC0

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/684-0-0x000000000069B000-0x000000000072E000-memory.dmp	family_expiro1
behavioral1/memory/684-1-0x0000000000630000-0x000000000072E000-memory.dmp	family_expiro1
behavioral1/memory/684-2-0x000000000069B000-0x000000000072E000-memory.dmp	family_expiro1
behavioral1/memory/684-3-0x0000000000630000-0x000000000072E000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2488	684	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_ee1b91e21168a161a7fabe448d398d94.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 684 wrote to memory of 2488	684	JaffaCakes118_ee1b91e21168a161a7fabe448d398d94.exe	31
PID 684 wrote to memory of 2488	684	JaffaCakes118_ee1b91e21168a161a7fabe448d398d94.exe	31
PID 684 wrote to memory of 2488	684	JaffaCakes118_ee1b91e21168a161a7fabe448d398d94.exe	31
PID 684 wrote to memory of 2488	684	JaffaCakes118_ee1b91e21168a161a7fabe448d398d94.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ee1b91e21168a161a7fabe448d398d94.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ee1b91e21168a161a7fabe448d398d94.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:684
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 684 -s 64
  2⤵
  - Program crash
  PID:2488

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/684-0-0x000000000069B000-0x000000000072E000-memory.dmp

Filesize
588KB

Download
memory/684-1-0x0000000000630000-0x000000000072E000-memory.dmp

Filesize
1016KB

Download
memory/684-2-0x000000000069B000-0x000000000072E000-memory.dmp

Filesize
588KB

Download
memory/684-3-0x0000000000630000-0x000000000072E000-memory.dmp

Filesize
1016KB

Download