expiro | 8392f43541623a5a25bd12b93f38e91697176d1e117245fa2ee983c98e405027

Analysis

max time kernel
117s
max time network
121s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
08-12-2024 10:26

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General

Target

d69194267e3e138dda1628c61181bc7f_JaffaCakes118.exe
Size

437KB
MD5

d69194267e3e138dda1628c61181bc7f
SHA1

a1ee6f7576739601cc1ad078ec30b99b6c35b6d5
SHA256

8392f43541623a5a25bd12b93f38e91697176d1e117245fa2ee983c98e405027
SHA512

fc3bbb60b7e2b175cac58bdeacb8900da83e87bde1421ce4aadbb7f89aaf49732bfe760856081b8259876fd7a35d02ab5b109714b7dea3b9ab03b4103a4d390d
SSDEEP

6144:ULVwm2i+mKaN68U8Wdvym8fXZkp/L07IkX/c6MVO4zXUdn1NwBLDmFBF3UN:9ri+m/A4Wx3UM/LzARMVO4sNyDm3F3U

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/2288-0-0x00000000009F0000-0x0000000000A84000-memory.dmp	family_expiro1
behavioral1/memory/2288-1-0x0000000000980000-0x0000000000A84000-memory.dmp	family_expiro1
behavioral1/memory/2288-2-0x00000000009F0000-0x0000000000A84000-memory.dmp	family_expiro1
behavioral1/memory/2288-3-0x0000000000980000-0x0000000000A84000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2752	2288	WerFault.exe	27

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	d69194267e3e138dda1628c61181bc7f_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 2752	2288	d69194267e3e138dda1628c61181bc7f_JaffaCakes118.exe	28
PID 2288 wrote to memory of 2752	2288	d69194267e3e138dda1628c61181bc7f_JaffaCakes118.exe	28
PID 2288 wrote to memory of 2752	2288	d69194267e3e138dda1628c61181bc7f_JaffaCakes118.exe	28
PID 2288 wrote to memory of 2752	2288	d69194267e3e138dda1628c61181bc7f_JaffaCakes118.exe	28

C:\Users\Admin\AppData\Local\Temp\d69194267e3e138dda1628c61181bc7f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d69194267e3e138dda1628c61181bc7f_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2288
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2288 -s 160
  2⤵
  - Program crash
  PID:2752

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/2288-0-0x00000000009F0000-0x0000000000A84000-memory.dmp

Filesize
592KB

Download
memory/2288-1-0x0000000000980000-0x0000000000A84000-memory.dmp

Filesize
1.0MB

Download
memory/2288-2-0x00000000009F0000-0x0000000000A84000-memory.dmp

Filesize
592KB

Download
memory/2288-3-0x0000000000980000-0x0000000000A84000-memory.dmp

Filesize
1.0MB

Download