expiro | 7add52701f549d44f7ad9daa542e1a855e99f7ca241083fd6d3ebf81132b502b

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-01-2025 21:47

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General

Target

JaffaCakes118_bf4039f308f73eefc96069a50984a92d.exe
Size

411KB
MD5

bf4039f308f73eefc96069a50984a92d
SHA1

a3e5c14bfe11dcb97cf519cf5aaf4066dddd0e27
SHA256

7add52701f549d44f7ad9daa542e1a855e99f7ca241083fd6d3ebf81132b502b
SHA512

4d068dde10ac2865255266fbe3d90ce94f1fe0a2d5854c80ec670b06ac7034fe2956be6aed744635c082a630dbe707b381723eedfa6b3981e4ab4c8a94719a71
SSDEEP

12288:cetLagza/unbxptDNWXkVTTM5ct0bDMT:cettMMbxp5NMk12c20T

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
behavioral2/memory/1808-0-0x0000000000F4B000-0x0000000000FDE000-memory.dmp	family_expiro1
behavioral2/memory/1808-1-0x0000000000EE0000-0x0000000000FDE000-memory.dmp	family_expiro1
behavioral2/memory/1808-2-0x0000000000F4B000-0x0000000000FDE000-memory.dmp	family_expiro1
behavioral2/memory/1808-3-0x0000000000EE0000-0x0000000000FDE000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3632	1808	WerFault.exe	81

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_bf4039f308f73eefc96069a50984a92d.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_bf4039f308f73eefc96069a50984a92d.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_bf4039f308f73eefc96069a50984a92d.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1808 -s 292
  2⤵
  - Program crash
  PID:3632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1808 -ip 1808
1⤵
PID:2100

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/1808-0-0x0000000000F4B000-0x0000000000FDE000-memory.dmp

Filesize
588KB

Download
memory/1808-1-0x0000000000EE0000-0x0000000000FDE000-memory.dmp

Filesize
1016KB

Download
memory/1808-2-0x0000000000F4B000-0x0000000000FDE000-memory.dmp

Filesize
588KB

Download
memory/1808-3-0x0000000000EE0000-0x0000000000FDE000-memory.dmp

Filesize
1016KB

Download