expiro | 9dc39339f85bb35f2b8d783951de9edb7a1c984893bdb5d053a1033f018100e7

Analysis

max time kernel
122s
max time network
127s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
08-01-2025 00:36

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

JaffaCakes118_8169c29e3df001cdc25bb70223cacfe8.exe
Size

7.3MB
MD5

8169c29e3df001cdc25bb70223cacfe8
SHA1

2f37b1e2776f9d887a3c05c2ea1f97126ac99780
SHA256

9dc39339f85bb35f2b8d783951de9edb7a1c984893bdb5d053a1033f018100e7
SHA512

8a2e70af1d3db64dfd7871897d0556f9ab7399560992d921b22c670c490f37a3ef7b08458d5652198563b93db611de9690684529b79986fbd392c8110e8384d4
SSDEEP

98304:TxC3ud6MOIvysiwCQKzo5qphIHVruP3WpF3UdE1hZHEdLFXmil+:4GQFMkhgJuP32+dmhZk/Z

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/1064-0-0x000000000136E000-0x0000000001401000-memory.dmp	family_expiro1
behavioral1/memory/1064-1-0x0000000000C20000-0x0000000001401000-memory.dmp	family_expiro1
behavioral1/memory/1064-2-0x000000000136E000-0x0000000001401000-memory.dmp	family_expiro1
behavioral1/memory/1064-3-0x0000000000C20000-0x0000000001401000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2684	1064	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_8169c29e3df001cdc25bb70223cacfe8.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1064 wrote to memory of 2684	1064	JaffaCakes118_8169c29e3df001cdc25bb70223cacfe8.exe	30
PID 1064 wrote to memory of 2684	1064	JaffaCakes118_8169c29e3df001cdc25bb70223cacfe8.exe	30
PID 1064 wrote to memory of 2684	1064	JaffaCakes118_8169c29e3df001cdc25bb70223cacfe8.exe	30
PID 1064 wrote to memory of 2684	1064	JaffaCakes118_8169c29e3df001cdc25bb70223cacfe8.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8169c29e3df001cdc25bb70223cacfe8.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8169c29e3df001cdc25bb70223cacfe8.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1064
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 156
  2⤵
  - Program crash
  PID:2684

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

Loading Replay Monitor...

Downloads

memory/1064-0-0x000000000136E000-0x0000000001401000-memory.dmp

Filesize
588KB

Download
memory/1064-1-0x0000000000C20000-0x0000000001401000-memory.dmp

Filesize
7.9MB

Download
memory/1064-2-0x000000000136E000-0x0000000001401000-memory.dmp

Filesize
588KB

Download
memory/1064-3-0x0000000000C20000-0x0000000001401000-memory.dmp

Filesize
7.9MB

Download