expiro | ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16/01/2025, 03:57

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General

Target

ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
Size

576KB
MD5

352bbdf2ad3709f9a61083588ba36ca0
SHA1

3df36d3f29d9592af584eb5bc7b8a501aa6f2afd
SHA256

ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5
SHA512

79cc275ab9a4e842a9e9bd203db39b793f46767cafa3b06cd107f92640d62b8c7d719aab6c3a852a16270eae421ecb35840e215e39f22d4052e2156d26e6ff7d
SSDEEP

12288:TxEDAi++Ryo2LbaHkrd7TkTvvrL+2ZBM8:3L+RXzkp7iX/VBM8

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 2 IoCs

backdoor

resource	yara_rule
behavioral1/memory/2756-0-0x0000000000400000-0x00000000005AA000-memory.dmp	family_expiro1
behavioral1/memory/2756-2-0x0000000000400000-0x00000000005AA000-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)	\??\H:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\X:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\Q:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\Y:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\G:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\L:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\K:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\M:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\O:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\R:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\T:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\V:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\E:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\J:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\W:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\Z:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\P:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\S:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\U:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\I:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
File opened (read-only)	\??\N:	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.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	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2756	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
2756	ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe

C:\Users\Admin\AppData\Local\Temp\ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe
"C:\Users\Admin\AppData\Local\Temp\ac2dcad84e5afb8bb3537173d2aac30d01dbad07bc88579573cf41891cf090e5N.exe"
1⤵
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:2756

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/2756-0-0x0000000000400000-0x00000000005AA000-memory.dmp

Filesize
1.7MB

Download
memory/2756-1-0x0000000000427000-0x0000000000429000-memory.dmp

Filesize
8KB

Download
memory/2756-2-0x0000000000400000-0x00000000005AA000-memory.dmp

Filesize
1.7MB

Download