expiro | de04cb4c08993f627b173f6dca07ff198a0eb598a9f2e9152fe1e8f31446e3e2

Analysis

max time kernel
96s
max time network
149s
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 23:55

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General

Target

JaffaCakes118_028501aa5632c8a3f48ab38b36aa90c1.exe
Size

415KB
MD5

028501aa5632c8a3f48ab38b36aa90c1
SHA1

1850338796fccf0e3bff8c41dcef965392a249ad
SHA256

de04cb4c08993f627b173f6dca07ff198a0eb598a9f2e9152fe1e8f31446e3e2
SHA512

f95852a31cbac0f32d887bb2e40e7cb384278e2d17b3932f855c98e422fa0b8b710754759f331c42d58acfa699e3293dd1cfa2fa57769622339eade8d95eebab
SSDEEP

12288:Z0M9eYNPHRAsdFTvbNjjSXN2mEmFioL1rny:ZH9Jp3d5RjjCs02

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/1984-0-0x0000000000FFB000-0x000000000108E000-memory.dmp	family_expiro1
behavioral2/memory/1984-1-0x0000000000F90000-0x000000000108E000-memory.dmp	family_expiro1
behavioral2/memory/1984-2-0x0000000000FFB000-0x000000000108E000-memory.dmp	family_expiro1
behavioral2/memory/1984-3-0x0000000000F90000-0x000000000108E000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3284	1984	WerFault.exe	84

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_028501aa5632c8a3f48ab38b36aa90c1.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_028501aa5632c8a3f48ab38b36aa90c1.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_028501aa5632c8a3f48ab38b36aa90c1.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1984
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1984 -s 256
  2⤵
  - Program crash
  PID:3284

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1984 -ip 1984
1⤵
PID:2064

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/1984-0-0x0000000000FFB000-0x000000000108E000-memory.dmp

Filesize
588KB

Download
memory/1984-1-0x0000000000F90000-0x000000000108E000-memory.dmp

Filesize
1016KB

Download
memory/1984-2-0x0000000000FFB000-0x000000000108E000-memory.dmp

Filesize
588KB

Download
memory/1984-3-0x0000000000F90000-0x000000000108E000-memory.dmp

Filesize
1016KB

Download