expiro | d2b10846a4eea53b2f163f009a1fe74d7b61f121288e9c697fa5b70cfd740149

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 19:41

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General

Target

JaffaCakes118_36d292cc4a153fe9a510275da379dffa.exe
Size

7.3MB
MD5

36d292cc4a153fe9a510275da379dffa
SHA1

1450efe039642edc9ab8510375f52c11ad2b4f7b
SHA256

d2b10846a4eea53b2f163f009a1fe74d7b61f121288e9c697fa5b70cfd740149
SHA512

2d6b6f0ecccb329cff83bef3425a08e1fdacf5e5312fb102361647d0463b662cf367d0f9884f5ea964da3523aabd3557279ef786b5e7b3302c3a527c3cc81703
SSDEEP

98304:VxC3ud6MOIvysiwCQKzo5qphIHVruP3WpF3UdE1hZHEdLFsmil+:aGQFMkhgJuP32+dmhZk/6

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/1440-0-0x0000000000FAE000-0x0000000001041000-memory.dmp	family_expiro1
behavioral1/memory/1440-1-0x0000000000860000-0x0000000001041000-memory.dmp	family_expiro1
behavioral1/memory/1440-2-0x0000000000FAE000-0x0000000001041000-memory.dmp	family_expiro1
behavioral1/memory/1440-3-0x0000000000860000-0x0000000001041000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1804	1440	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_36d292cc4a153fe9a510275da379dffa.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 1804	1440	JaffaCakes118_36d292cc4a153fe9a510275da379dffa.exe	30
PID 1440 wrote to memory of 1804	1440	JaffaCakes118_36d292cc4a153fe9a510275da379dffa.exe	30
PID 1440 wrote to memory of 1804	1440	JaffaCakes118_36d292cc4a153fe9a510275da379dffa.exe	30
PID 1440 wrote to memory of 1804	1440	JaffaCakes118_36d292cc4a153fe9a510275da379dffa.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36d292cc4a153fe9a510275da379dffa.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36d292cc4a153fe9a510275da379dffa.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1440
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1440 -s 156
  2⤵
  - Program crash
  PID:1804

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/1440-0-0x0000000000FAE000-0x0000000001041000-memory.dmp

Filesize
588KB

Download
memory/1440-1-0x0000000000860000-0x0000000001041000-memory.dmp

Filesize
7.9MB

Download
memory/1440-2-0x0000000000FAE000-0x0000000001041000-memory.dmp

Filesize
588KB

Download
memory/1440-3-0x0000000000860000-0x0000000001041000-memory.dmp

Filesize
7.9MB

Download