expiro | e64a2b9124c44c00657ab903cc5408aa1d43f0f0b8a4d748cae5230f6cc89491

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31/12/2024, 02:31

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General

Target

JaffaCakes118_01270e1e915fd900ef6fe2f1c1a0c207.exe
Size

437KB
MD5

01270e1e915fd900ef6fe2f1c1a0c207
SHA1

e1ac4684f4bdd8c3663b9fe414e6886174df2a6e
SHA256

e64a2b9124c44c00657ab903cc5408aa1d43f0f0b8a4d748cae5230f6cc89491
SHA512

b8f98b1c9ae4badddc9e8bcef11c9416c4b2b20f9e310c7a39f62e2c473e95c4d25963a762a55eb1a79a02cca36477a693dc15a2cc70587b90690e7fac4188d4
SSDEEP

6144:UnVwm2i+mKaN68U8Wdvym8fXZkc/L07IkX/c6MVO4zXUdn1NwBLDmFBF3UN:9ri+m/A4Wx3UB/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/2112-0-0x0000000000FF0000-0x0000000001084000-memory.dmp	family_expiro1
behavioral1/memory/2112-1-0x0000000000F80000-0x0000000001084000-memory.dmp	family_expiro1
behavioral1/memory/2112-2-0x0000000000FF0000-0x0000000001084000-memory.dmp	family_expiro1
behavioral1/memory/2112-3-0x0000000000F80000-0x0000000001084000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2756	2112	WerFault.exe	30

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_01270e1e915fd900ef6fe2f1c1a0c207.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 2756	2112	JaffaCakes118_01270e1e915fd900ef6fe2f1c1a0c207.exe	31
PID 2112 wrote to memory of 2756	2112	JaffaCakes118_01270e1e915fd900ef6fe2f1c1a0c207.exe	31
PID 2112 wrote to memory of 2756	2112	JaffaCakes118_01270e1e915fd900ef6fe2f1c1a0c207.exe	31
PID 2112 wrote to memory of 2756	2112	JaffaCakes118_01270e1e915fd900ef6fe2f1c1a0c207.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_01270e1e915fd900ef6fe2f1c1a0c207.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_01270e1e915fd900ef6fe2f1c1a0c207.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2112 -s 160
  2⤵
  - Program crash
  PID:2756

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/2112-0-0x0000000000FF0000-0x0000000001084000-memory.dmp

Filesize
592KB

Download
memory/2112-1-0x0000000000F80000-0x0000000001084000-memory.dmp

Filesize
1.0MB

Download
memory/2112-2-0x0000000000FF0000-0x0000000001084000-memory.dmp

Filesize
592KB

Download
memory/2112-3-0x0000000000F80000-0x0000000001084000-memory.dmp

Filesize
1.0MB

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