expiro | a30d56e5191331af35183391ecf6ea1bd45dccea1fbeb0a7e6f6933bf7f209fd

Analysis

max time kernel
121s
max time network
124s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
03-01-2025 15:50

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General

Target

JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe
Size

417KB
MD5

6dbaa3024b9d157f41620afae069d709
SHA1

511581e901d79cb5aa3352d1e2b21e219016d558
SHA256

a30d56e5191331af35183391ecf6ea1bd45dccea1fbeb0a7e6f6933bf7f209fd
SHA512

f6b16ae8e36e5e395f454fd0b5bee8ce1fabcd8dfee73b63a971946d2f46f63259d1b19e6fe18f188ea05e6b68c4d415e78ba970bc5f869ff03daf858f1a9c96
SSDEEP

6144:QSpwTxz8fEYga22UHHXyDArvBIM6zOe3ONgEox946lzmEZYS5+oj9COdbeOut8MQ:3+lAfEYAtHCDArvxeOhjo46hjYJQ0mN

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/2680-0-0x000000000140C000-0x000000000149F000-memory.dmp	family_expiro1
behavioral1/memory/2680-1-0x00000000013A0000-0x000000000149F000-memory.dmp	family_expiro1
behavioral1/memory/2680-2-0x000000000140C000-0x000000000149F000-memory.dmp	family_expiro1
behavioral1/memory/2680-3-0x00000000013A0000-0x000000000149F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2784	2680	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_6dbaa3024b9d157f41620afae069d709.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 2784	2680	JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe	30
PID 2680 wrote to memory of 2784	2680	JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe	30
PID 2680 wrote to memory of 2784	2680	JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe	30
PID 2680 wrote to memory of 2784	2680	JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2680 -s 68
  2⤵
  - Program crash
  PID:2784

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/2680-0-0x000000000140C000-0x000000000149F000-memory.dmp

Filesize
588KB

Download
memory/2680-1-0x00000000013A0000-0x000000000149F000-memory.dmp

Filesize
1020KB

Download
memory/2680-2-0x000000000140C000-0x000000000149F000-memory.dmp

Filesize
588KB

Download
memory/2680-3-0x00000000013A0000-0x000000000149F000-memory.dmp

Filesize
1020KB

Download