expiro | 5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90

Analysis

max time kernel
121s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10-01-2025 02:31

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General

Target

JaffaCakes118_d88dc6b1c9d9d0ce96c24003b2e22f3b.exe
Size

437KB
MD5

d88dc6b1c9d9d0ce96c24003b2e22f3b
SHA1

c9c620dc34f5360a0619b64549400730ddb698be
SHA256

5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90
SHA512

b3f4ba6cff1441cf97d09d542dad5068450f9a1fa569b06407e481f1b01e09e3562e01621b5bfb07df2719296c36bb86596e51b76e811de53d978960fd92bdfa
SSDEEP

6144:UbVwm2i+mKaN68U8Wdvym8fXZkp/L07IkX/c6MVO4zXUdn1NwBLDmFBF3UN:pri+m/A4Wx3U0/LzARMVO4sNyDm3F3U

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/2276-0-0x0000000000D10000-0x0000000000DA4000-memory.dmp	family_expiro1
behavioral1/memory/2276-1-0x0000000000CA0000-0x0000000000DA4000-memory.dmp	family_expiro1
behavioral1/memory/2276-2-0x0000000000D10000-0x0000000000DA4000-memory.dmp	family_expiro1
behavioral1/memory/2276-3-0x0000000000CA0000-0x0000000000DA4000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2656	2276	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_d88dc6b1c9d9d0ce96c24003b2e22f3b.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2276 wrote to memory of 2656	2276	JaffaCakes118_d88dc6b1c9d9d0ce96c24003b2e22f3b.exe	30
PID 2276 wrote to memory of 2656	2276	JaffaCakes118_d88dc6b1c9d9d0ce96c24003b2e22f3b.exe	30
PID 2276 wrote to memory of 2656	2276	JaffaCakes118_d88dc6b1c9d9d0ce96c24003b2e22f3b.exe	30
PID 2276 wrote to memory of 2656	2276	JaffaCakes118_d88dc6b1c9d9d0ce96c24003b2e22f3b.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d88dc6b1c9d9d0ce96c24003b2e22f3b.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d88dc6b1c9d9d0ce96c24003b2e22f3b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2276
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2276 -s 160
  2⤵
  - Program crash
  PID:2656

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/2276-0-0x0000000000D10000-0x0000000000DA4000-memory.dmp

Filesize
592KB

Download
memory/2276-1-0x0000000000CA0000-0x0000000000DA4000-memory.dmp

Filesize
1.0MB

Download
memory/2276-2-0x0000000000D10000-0x0000000000DA4000-memory.dmp

Filesize
592KB

Download
memory/2276-3-0x0000000000CA0000-0x0000000000DA4000-memory.dmp

Filesize
1.0MB

Download