expiro | ef7309d7001ceb4bbb9a65059eb02f07aef6a5dcfd6f35c18c328b79f5395383

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
01-01-2025 13:37

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General

Target

JaffaCakes118_572e52a32c9245c270df10a8ae475666.exe
Size

476KB
MD5

572e52a32c9245c270df10a8ae475666
SHA1

827ef6b04f51d13c409881699b32096bb83ea221
SHA256

ef7309d7001ceb4bbb9a65059eb02f07aef6a5dcfd6f35c18c328b79f5395383
SHA512

f8a973623be0cc440b7715f4c261b6f3dcf5605e844cbc527fa4ed74050f88ee0d6fd94c06e3d5a314754e401cf36320460470efd8ee7ae93b5ed49aade997af
SSDEEP

12288:AYmIjE7eNdKcWEbz2Ubr4TgyUbZm6qCs8e/G:A7eNAYbz2Ub8T5geL

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/2016-0-0x00000000012EB000-0x000000000137F000-memory.dmp	family_expiro1
behavioral1/memory/2016-1-0x0000000001270000-0x000000000137F000-memory.dmp	family_expiro1
behavioral1/memory/2016-2-0x00000000012EB000-0x000000000137F000-memory.dmp	family_expiro1
behavioral1/memory/2016-3-0x0000000001270000-0x000000000137F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3064	2016	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_572e52a32c9245c270df10a8ae475666.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 3064	2016	JaffaCakes118_572e52a32c9245c270df10a8ae475666.exe	31
PID 2016 wrote to memory of 3064	2016	JaffaCakes118_572e52a32c9245c270df10a8ae475666.exe	31
PID 2016 wrote to memory of 3064	2016	JaffaCakes118_572e52a32c9245c270df10a8ae475666.exe	31
PID 2016 wrote to memory of 3064	2016	JaffaCakes118_572e52a32c9245c270df10a8ae475666.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_572e52a32c9245c270df10a8ae475666.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_572e52a32c9245c270df10a8ae475666.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2016 -s 144
  2⤵
  - Program crash
  PID:3064

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/2016-0-0x00000000012EB000-0x000000000137F000-memory.dmp

Filesize
592KB

Download
memory/2016-1-0x0000000001270000-0x000000000137F000-memory.dmp

Filesize
1.1MB

Download
memory/2016-2-0x00000000012EB000-0x000000000137F000-memory.dmp

Filesize
592KB

Download
memory/2016-3-0x0000000001270000-0x000000000137F000-memory.dmp

Filesize
1.1MB

Download