expiro | 736c376782c1235a85c487abfbd2813b530cae2b2ea02b89a5a6aa4d89a5a190

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-12-2024 17:09

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General

Target

fc69cc12293f80d316741ccab06faa67_JaffaCakes118.exe
Size

437KB
MD5

fc69cc12293f80d316741ccab06faa67
SHA1

890c2cd13e381a6ae429e69748c95495c0cb656d
SHA256

736c376782c1235a85c487abfbd2813b530cae2b2ea02b89a5a6aa4d89a5a190
SHA512

fa6c332b838a3102ad418bb306198d2cbae47ba347526fd50dbe059206c9e7568604f3762d4c3cebb00e8f08962e4cf038797fa6d9cbadda6953fb5f18edfe15
SSDEEP

6144:Uytwm2NOzPSK5U2SoJ8VWackMV1ZmXRWLgKocUq8nOfaIROo71YvK09lw+45B:2rLK5U2SoysXmwLQcUqgsPBYv745B

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/2420-0-0x0000000000D80000-0x0000000000E14000-memory.dmp	family_expiro1
behavioral1/memory/2420-1-0x0000000000D10000-0x0000000000E14000-memory.dmp	family_expiro1
behavioral1/memory/2420-2-0x0000000000D80000-0x0000000000E14000-memory.dmp	family_expiro1
behavioral1/memory/2420-3-0x0000000000D10000-0x0000000000E14000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2372	2420	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	fc69cc12293f80d316741ccab06faa67_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 2372	2420	fc69cc12293f80d316741ccab06faa67_JaffaCakes118.exe	30
PID 2420 wrote to memory of 2372	2420	fc69cc12293f80d316741ccab06faa67_JaffaCakes118.exe	30
PID 2420 wrote to memory of 2372	2420	fc69cc12293f80d316741ccab06faa67_JaffaCakes118.exe	30
PID 2420 wrote to memory of 2372	2420	fc69cc12293f80d316741ccab06faa67_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\fc69cc12293f80d316741ccab06faa67_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fc69cc12293f80d316741ccab06faa67_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2420 -s 160
  2⤵
  - Program crash
  PID:2372

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/2420-0-0x0000000000D80000-0x0000000000E14000-memory.dmp

Filesize
592KB

Download
memory/2420-1-0x0000000000D10000-0x0000000000E14000-memory.dmp

Filesize
1.0MB

Download
memory/2420-2-0x0000000000D80000-0x0000000000E14000-memory.dmp

Filesize
592KB

Download
memory/2420-3-0x0000000000D10000-0x0000000000E14000-memory.dmp

Filesize
1.0MB

Download