expiro | 3b9a0faccb08f2b0311b61aa153d9c7ff57f09c51527c1e13b2e30ae9fa58725

Analysis

max time kernel
83s
max time network
19s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-01-2025 00:24

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General

Target

3b9a0faccb08f2b0311b61aa153d9c7ff57f09c51527c1e13b2e30ae9fa58725.exe
Size

561KB
MD5

80a9bc63eb553e0c7c141ddd6fc474a9
SHA1

0b318f89b631c40e4a70b7df8af67bcec0438f2a
SHA256

3b9a0faccb08f2b0311b61aa153d9c7ff57f09c51527c1e13b2e30ae9fa58725
SHA512

f6be13f61b70a84fd6dcda41cd0d9485bc58aa0f9192599156c781d885cd7265ec58de159397b5f392ebcbcf638cdce59688c6f71f4dabba0fca6518b496a745
SSDEEP

12288:cYqgNsIrEkoNk7LNzqZpLnsGKORgvWLxTkphZGTTqogyAx:lrRoNk7AZpRR4WTk/mdAx

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/2424-0-0x0000000000493000-0x00000000004BA000-memory.dmp	family_expiro1
behavioral1/memory/2424-1-0x0000000000400000-0x00000000004BA000-memory.dmp	family_expiro1
behavioral1/memory/2424-3-0x0000000000493000-0x00000000004BA000-memory.dmp	family_expiro1
behavioral1/memory/2424-4-0x0000000000400000-0x00000000004BA000-memory.dmp	family_expiro1

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	3b9a0faccb08f2b0311b61aa153d9c7ff57f09c51527c1e13b2e30ae9fa58725.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2424	3b9a0faccb08f2b0311b61aa153d9c7ff57f09c51527c1e13b2e30ae9fa58725.exe

C:\Users\Admin\AppData\Local\Temp\3b9a0faccb08f2b0311b61aa153d9c7ff57f09c51527c1e13b2e30ae9fa58725.exe
"C:\Users\Admin\AppData\Local\Temp\3b9a0faccb08f2b0311b61aa153d9c7ff57f09c51527c1e13b2e30ae9fa58725.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:2424

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/2424-0-0x0000000000493000-0x00000000004BA000-memory.dmp

Filesize
156KB

Download
memory/2424-1-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2424-3-0x0000000000493000-0x00000000004BA000-memory.dmp

Filesize
156KB

Download
memory/2424-4-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download