expiro | f3be287fb9bc82066dfd43947a12b5d7ec64807494e3975e3ee4e079f2206cab

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-12-2024 06:34

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General

Target

f7c0b56ff79a7baa9ca1983fcd2ea493_JaffaCakes118.exe
Size

415KB
MD5

f7c0b56ff79a7baa9ca1983fcd2ea493
SHA1

4da790cffa5f95517a0743f6bf3385622045f406
SHA256

f3be287fb9bc82066dfd43947a12b5d7ec64807494e3975e3ee4e079f2206cab
SHA512

0eabe070935399ece292c9f6e3fece93541f845179dfd71d18d61367e31c2dc8a80cb0854c68100634a7632f99135277db923acc57216503f7a4bd1870766b89
SSDEEP

6144:Rhhe1/FVNES2co+QSNWpve/eIoLZOtqJSFlYmd5zSKPjf2fzlFeKSW:c1FeltSNWtA0Et5UGDPOS

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/2072-0-0x0000000000FEB000-0x000000000107E000-memory.dmp	family_expiro1
behavioral1/memory/2072-1-0x0000000000F80000-0x000000000107E000-memory.dmp	family_expiro1
behavioral1/memory/2072-2-0x0000000000FEB000-0x000000000107E000-memory.dmp	family_expiro1
behavioral1/memory/2072-3-0x0000000000F80000-0x000000000107E000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2360	2072	WerFault.exe	30

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	f7c0b56ff79a7baa9ca1983fcd2ea493_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 2360	2072	f7c0b56ff79a7baa9ca1983fcd2ea493_JaffaCakes118.exe	32
PID 2072 wrote to memory of 2360	2072	f7c0b56ff79a7baa9ca1983fcd2ea493_JaffaCakes118.exe	32
PID 2072 wrote to memory of 2360	2072	f7c0b56ff79a7baa9ca1983fcd2ea493_JaffaCakes118.exe	32
PID 2072 wrote to memory of 2360	2072	f7c0b56ff79a7baa9ca1983fcd2ea493_JaffaCakes118.exe	32

C:\Users\Admin\AppData\Local\Temp\f7c0b56ff79a7baa9ca1983fcd2ea493_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f7c0b56ff79a7baa9ca1983fcd2ea493_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2072 -s 64
  2⤵
  - Program crash
  PID:2360

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/2072-0-0x0000000000FEB000-0x000000000107E000-memory.dmp

Filesize
588KB

Download
memory/2072-1-0x0000000000F80000-0x000000000107E000-memory.dmp

Filesize
1016KB

Download
memory/2072-2-0x0000000000FEB000-0x000000000107E000-memory.dmp

Filesize
588KB

Download
memory/2072-3-0x0000000000F80000-0x000000000107E000-memory.dmp

Filesize
1016KB

Download