expiro | 8e0941f24e14d41dd739dbd8bdd14e1c350451145d5fd870cd06354a07c22591

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-01-2025 00:55

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General

Target

JaffaCakes118_f2cd586f67c2d4c4d70815571b4b0df7.exe
Size

411KB
MD5

f2cd586f67c2d4c4d70815571b4b0df7
SHA1

1df60e46db00ffe0d145c542c3cad89b7cde2c70
SHA256

8e0941f24e14d41dd739dbd8bdd14e1c350451145d5fd870cd06354a07c22591
SHA512

01ef35564168280b4d0e84d1497e92d9bf2a3e8f2f3b0f3910ee177671bfe1e9749c9c94525f2c7f2c0d79b14707c8748882b7f6ef08c29eaaa678fe60ac0967
SSDEEP

12288:SetLagza/unbxptHNWXkVTTM5ct0bDMT:SettMMbxplNMk12c20T

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/2840-0-0x000000000088B000-0x000000000091E000-memory.dmp	family_expiro1
behavioral1/memory/2840-1-0x0000000000820000-0x000000000091E000-memory.dmp	family_expiro1
behavioral1/memory/2840-2-0x000000000088B000-0x000000000091E000-memory.dmp	family_expiro1
behavioral1/memory/2840-3-0x0000000000820000-0x000000000091E000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2884	2840	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_f2cd586f67c2d4c4d70815571b4b0df7.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2840 wrote to memory of 2884	2840	JaffaCakes118_f2cd586f67c2d4c4d70815571b4b0df7.exe	30
PID 2840 wrote to memory of 2884	2840	JaffaCakes118_f2cd586f67c2d4c4d70815571b4b0df7.exe	30
PID 2840 wrote to memory of 2884	2840	JaffaCakes118_f2cd586f67c2d4c4d70815571b4b0df7.exe	30
PID 2840 wrote to memory of 2884	2840	JaffaCakes118_f2cd586f67c2d4c4d70815571b4b0df7.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f2cd586f67c2d4c4d70815571b4b0df7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_f2cd586f67c2d4c4d70815571b4b0df7.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2840 -s 96
  2⤵
  - Program crash
  PID:2884

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/2840-0-0x000000000088B000-0x000000000091E000-memory.dmp

Filesize
588KB

Download
memory/2840-1-0x0000000000820000-0x000000000091E000-memory.dmp

Filesize
1016KB

Download
memory/2840-2-0x000000000088B000-0x000000000091E000-memory.dmp

Filesize
588KB

Download
memory/2840-3-0x0000000000820000-0x000000000091E000-memory.dmp

Filesize
1016KB

Download