expiro | 369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2

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
31-12-2024 22:46

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General

Target

JaffaCakes118_3c1515f5f55282c116ad9ba9547c9121.exe
Size

437KB
MD5

3c1515f5f55282c116ad9ba9547c9121
SHA1

41fdaa7f734ffdd38c95d104ed3f3583f9867c8b
SHA256

369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2
SHA512

6fc0c858013c0734e65f410a8cf0406e3953ef2d3edc07209c67744fa13b22295ec6bf03c551aa593f839d14caffe260c9410bb26fa8c692c8855446892e7dca
SSDEEP

6144:UFVwm2i+mKaN68U8Wdvym8fXZk1/L07IkX/c6MVO4zXUdn1NwBLDmFBF3UN:Lri+m/A4Wx3Uo/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/2584-0-0x0000000000410000-0x00000000004A4000-memory.dmp	family_expiro1
behavioral1/memory/2584-1-0x00000000003A0000-0x00000000004A4000-memory.dmp	family_expiro1
behavioral1/memory/2584-2-0x0000000000410000-0x00000000004A4000-memory.dmp	family_expiro1
behavioral1/memory/2584-3-0x00000000003A0000-0x00000000004A4000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2196	2584	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_3c1515f5f55282c116ad9ba9547c9121.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2584 wrote to memory of 2196	2584	JaffaCakes118_3c1515f5f55282c116ad9ba9547c9121.exe	31
PID 2584 wrote to memory of 2196	2584	JaffaCakes118_3c1515f5f55282c116ad9ba9547c9121.exe	31
PID 2584 wrote to memory of 2196	2584	JaffaCakes118_3c1515f5f55282c116ad9ba9547c9121.exe	31
PID 2584 wrote to memory of 2196	2584	JaffaCakes118_3c1515f5f55282c116ad9ba9547c9121.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3c1515f5f55282c116ad9ba9547c9121.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3c1515f5f55282c116ad9ba9547c9121.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2584
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2584 -s 160
  2⤵
  - Program crash
  PID:2196

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/2584-0-0x0000000000410000-0x00000000004A4000-memory.dmp

Filesize
592KB

Download
memory/2584-1-0x00000000003A0000-0x00000000004A4000-memory.dmp

Filesize
1.0MB

Download
memory/2584-2-0x0000000000410000-0x00000000004A4000-memory.dmp

Filesize
592KB

Download
memory/2584-3-0x00000000003A0000-0x00000000004A4000-memory.dmp

Filesize
1.0MB

Download