expiro | 862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/11/2024, 05:47

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General

Target

862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192.exe
Size

7.3MB
MD5

ded0237274bd7055ff7f1a8b2b1dad89
SHA1

afd62117042145ada713bbd6abe59eb7cad0a45b
SHA256

862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192
SHA512

781ccb7467afcc74d193884cfa241f2bc9a99567d3a92b42c5e9ae2b9688ac4ff4119790ef02639901e678226aa56d6a8aa85a43e63a174cdfed949d00ae96a6
SSDEEP

98304:VxC3ud6MOIvysiwCQKzo5qphIHVruP3WpF3UdE1hZHEdLFsmil+A:aGQFMkhgJuP32+dmhZk/69

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/2688-0-0x00000000017DE000-0x0000000001871000-memory.dmp	family_expiro1
behavioral1/memory/2688-1-0x0000000001090000-0x0000000001871000-memory.dmp	family_expiro1
behavioral1/memory/2688-2-0x00000000017DE000-0x0000000001871000-memory.dmp	family_expiro1
behavioral1/memory/2688-3-0x0000000001090000-0x0000000001871000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2400	2688	WerFault.exe	30

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	862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 2400	2688	862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192.exe	31
PID 2688 wrote to memory of 2400	2688	862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192.exe	31
PID 2688 wrote to memory of 2400	2688	862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192.exe	31
PID 2688 wrote to memory of 2400	2688	862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192.exe	31

C:\Users\Admin\AppData\Local\Temp\862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192.exe
"C:\Users\Admin\AppData\Local\Temp\862f8bf76dfc4745fb742c01f3fecf1b21ebfcf8e97a6ac683713710d5889192.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2688 -s 156
  2⤵
  - Program crash
  PID:2400

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

Replay Monitor

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Downloads

memory/2688-0-0x00000000017DE000-0x0000000001871000-memory.dmp

Filesize
588KB

Download
memory/2688-1-0x0000000001090000-0x0000000001871000-memory.dmp

Filesize
7.9MB

Download
memory/2688-2-0x00000000017DE000-0x0000000001871000-memory.dmp

Filesize
588KB

Download
memory/2688-3-0x0000000001090000-0x0000000001871000-memory.dmp

Filesize
7.9MB

Download