expiro | 4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c

Analysis

max time kernel
15s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16/01/2025, 08:19

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General

Target

4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
Size

576KB
MD5

f6ac62956c8a5d31deccceec8f0c5e41
SHA1

9e00eb2fc5c31f9000733cf86a2fae5919d8f1f1
SHA256

4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c
SHA512

f95a74d7cdf8d6cc742a07aa94f039ff18f0a532461846f6bb29c7a35aa7474d72ab38b5c8e2e25781e273e49b50bcdd24c277dcb591924fe75343ae22d77ef7
SSDEEP

12288:TxEDAi++Ryo2LbaHkrd7TkTvvrL+2ZBM8P:3L+RXzkp7iX/VBM8P

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 1 IoCs

backdoor

resource	yara_rule
behavioral1/memory/1568-2-0x0000000000400000-0x00000000005AA000-memory.dmp	family_expiro1

Enumerates connected drives 3 TTPs 21 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\I:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\J:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\P:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\X:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\Y:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\M:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\O:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\Q:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\T:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\S:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\U:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\V:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\E:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\G:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\H:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\L:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\Z:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\K:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\N:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\R:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
File opened (read-only)	\??\W:	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe

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	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1568	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
1568	4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe

C:\Users\Admin\AppData\Local\Temp\4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe
"C:\Users\Admin\AppData\Local\Temp\4d78c92d9702a848a4718cac7d8e70137950fde128e70e1743eade7ddd00b77c.exe"
1⤵
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:1568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1568-0-0x0000000000400000-0x00000000005AA000-memory.dmp

Filesize
1.7MB

Download
memory/1568-1-0x0000000000427000-0x0000000000429000-memory.dmp

Filesize
8KB

Download
memory/1568-2-0x0000000000400000-0x00000000005AA000-memory.dmp

Filesize
1.7MB

Download