expiro | e53265ff9927a0cdd58ddc7d1cfa5f2b12e478f47cca83c886e9cd08920c866b

Analysis

max time kernel
120s
max time network
126s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
05-01-2025 08:29

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General

Target

JaffaCakes118_97aa74a42485d4bf881653176cc1c7aa.exe
Size

417KB
MD5

97aa74a42485d4bf881653176cc1c7aa
SHA1

8ce19a0177784d187b593a502bb043765843a759
SHA256

e53265ff9927a0cdd58ddc7d1cfa5f2b12e478f47cca83c886e9cd08920c866b
SHA512

823ea6caea27e58283915b75ac0d3207ae487d3d552c458c14b1e47ff7ae66c3ea518035c9bf78dc75067fe3dbb8c5ba3a50891a69b3d41cbc4e328ec716961c
SSDEEP

6144:UvSpwTEOzPSK5U2SoJ8VWackOV1ZmXRWLgKocUq8nOfaIROo71YvK09lw+45B:l+IK5U2Soys1mwLQcUqgsPBYv745B

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/2908-0-0x000000000034C000-0x00000000003DF000-memory.dmp	family_expiro1
behavioral1/memory/2908-1-0x00000000002E0000-0x00000000003DF000-memory.dmp	family_expiro1
behavioral1/memory/2908-2-0x000000000034C000-0x00000000003DF000-memory.dmp	family_expiro1
behavioral1/memory/2908-3-0x00000000002E0000-0x00000000003DF000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2796	2908	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_97aa74a42485d4bf881653176cc1c7aa.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2908 wrote to memory of 2796	2908	JaffaCakes118_97aa74a42485d4bf881653176cc1c7aa.exe	30
PID 2908 wrote to memory of 2796	2908	JaffaCakes118_97aa74a42485d4bf881653176cc1c7aa.exe	30
PID 2908 wrote to memory of 2796	2908	JaffaCakes118_97aa74a42485d4bf881653176cc1c7aa.exe	30
PID 2908 wrote to memory of 2796	2908	JaffaCakes118_97aa74a42485d4bf881653176cc1c7aa.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_97aa74a42485d4bf881653176cc1c7aa.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_97aa74a42485d4bf881653176cc1c7aa.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2908
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2908 -s 68
  2⤵
  - Program crash
  PID:2796

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/2908-0-0x000000000034C000-0x00000000003DF000-memory.dmp

Filesize
588KB

Download
memory/2908-1-0x00000000002E0000-0x00000000003DF000-memory.dmp

Filesize
1020KB

Download
memory/2908-2-0x000000000034C000-0x00000000003DF000-memory.dmp

Filesize
588KB

Download
memory/2908-3-0x00000000002E0000-0x00000000003DF000-memory.dmp

Filesize
1020KB

Download