expiro | e3d380417ff300e5ca62e16e77b3977233df145e8c429a3bbb60eea59e3599b9

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

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

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General

Target

JaffaCakes118_19fc4d5fd0417d431cdb16112c593851.exe
Size

738KB
MD5

19fc4d5fd0417d431cdb16112c593851
SHA1

814dec635ce5d1e55479ca9f81b22236e27e421b
SHA256

e3d380417ff300e5ca62e16e77b3977233df145e8c429a3bbb60eea59e3599b9
SHA512

3242b32c014773ba2ac689ae56fecb42a5bf2707c4fbdeddd3b310201ffb9fe25577977f2b76994615227d052a76fb313d80e1592a3095f3a6fc1397ea23e41e
SSDEEP

12288:CAwSfxL/2Dc3jDLLmt0LDQewsHjhWW1d9cgO0qIlp7+x9xhIS2:HGewsHjoW1d9c0Na98

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/2436-0-0x0000000000FBF000-0x0000000001052000-memory.dmp	family_expiro1
behavioral1/memory/2436-1-0x0000000000F00000-0x0000000001052000-memory.dmp	family_expiro1
behavioral1/memory/2436-2-0x0000000000FBF000-0x0000000001052000-memory.dmp	family_expiro1
behavioral1/memory/2436-3-0x0000000000F00000-0x0000000001052000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2204	2436	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_19fc4d5fd0417d431cdb16112c593851.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2436 wrote to memory of 2204	2436	JaffaCakes118_19fc4d5fd0417d431cdb16112c593851.exe	31
PID 2436 wrote to memory of 2204	2436	JaffaCakes118_19fc4d5fd0417d431cdb16112c593851.exe	31
PID 2436 wrote to memory of 2204	2436	JaffaCakes118_19fc4d5fd0417d431cdb16112c593851.exe	31
PID 2436 wrote to memory of 2204	2436	JaffaCakes118_19fc4d5fd0417d431cdb16112c593851.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_19fc4d5fd0417d431cdb16112c593851.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_19fc4d5fd0417d431cdb16112c593851.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2436
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2436 -s 124
  2⤵
  - Program crash
  PID:2204

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/2436-0-0x0000000000FBF000-0x0000000001052000-memory.dmp

Filesize
588KB

Download
memory/2436-1-0x0000000000F00000-0x0000000001052000-memory.dmp

Filesize
1.3MB

Download
memory/2436-2-0x0000000000FBF000-0x0000000001052000-memory.dmp

Filesize
588KB

Download
memory/2436-3-0x0000000000F00000-0x0000000001052000-memory.dmp

Filesize
1.3MB

Download