expiro | c6a842597032bb7d5481806f612de17b61eecd73c5eb3a723cd048549db3c665

Analysis

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

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 15:58

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General

Target

JaffaCakes118_2cca701c7391eb5719b6cac30cc37059.exe
Size

411KB
MD5

2cca701c7391eb5719b6cac30cc37059
SHA1

560e51fd7ad9467bea548b020ca9826e3258cf9b
SHA256

c6a842597032bb7d5481806f612de17b61eecd73c5eb3a723cd048549db3c665
SHA512

e0b4540d12f81336c18b09eafb317a17d23ac976e2c0e9225d09753bc09587993ed9fff0bcd2864a4a63d6e3fe2fbaff8704711bbf077dd694542de034cfceed
SSDEEP

12288:UetLagza/unbxpt4NWXkVTTM5ct0bDMT:UettMMbxpeNMk12c20T

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/2380-0-0x0000000000A8B000-0x0000000000B1E000-memory.dmp	family_expiro1
behavioral1/memory/2380-1-0x0000000000A20000-0x0000000000B1E000-memory.dmp	family_expiro1
behavioral1/memory/2380-2-0x0000000000A8B000-0x0000000000B1E000-memory.dmp	family_expiro1
behavioral1/memory/2380-3-0x0000000000A20000-0x0000000000B1E000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2084	2380	WerFault.exe	29

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_2cca701c7391eb5719b6cac30cc37059.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_2cca701c7391eb5719b6cac30cc37059.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_2cca701c7391eb5719b6cac30cc37059.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_2cca701c7391eb5719b6cac30cc37059.exe	30
PID 2380 wrote to memory of 2084	2380	JaffaCakes118_2cca701c7391eb5719b6cac30cc37059.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2cca701c7391eb5719b6cac30cc37059.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2cca701c7391eb5719b6cac30cc37059.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 96
  2⤵
  - Program crash
  PID:2084

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/2380-0-0x0000000000A8B000-0x0000000000B1E000-memory.dmp

Filesize
588KB

Download
memory/2380-1-0x0000000000A20000-0x0000000000B1E000-memory.dmp

Filesize
1016KB

Download
memory/2380-2-0x0000000000A8B000-0x0000000000B1E000-memory.dmp

Filesize
588KB

Download
memory/2380-3-0x0000000000A20000-0x0000000000B1E000-memory.dmp

Filesize
1016KB

Download