expiro | d2bd5a0ce6189a1802e3c0ccb029190866523561881ada63542190216b10874b

Analysis

max time kernel
117s
max time network
119s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
07/12/2024, 22:03

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General

Target

d3d34d1a3a4965eb58c53651d29d8520_JaffaCakes118.exe
Size

7.3MB
MD5

d3d34d1a3a4965eb58c53651d29d8520
SHA1

77f42a71a450ed3333036c2ac137644e27591261
SHA256

d2bd5a0ce6189a1802e3c0ccb029190866523561881ada63542190216b10874b
SHA512

b1a8d7bd7abcc4611ad65d8f8850de63858aa3de5cfe1d542f23e4e505beb691d608431409417f5d05e8f93de519b055ea82a7a48322f9a4f7fb2e3cc8810832
SSDEEP

98304:ZxC3ud6MOIvysiHCQKzo5qphIHVruP3WpF3UdE1hZHEdLFyphgfq:eGQ8MkhgJuP32+dmhZk/yp9

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/1976-0-0x000000000188E000-0x0000000001921000-memory.dmp	family_expiro1
behavioral1/memory/1976-1-0x0000000001140000-0x0000000001921000-memory.dmp	family_expiro1
behavioral1/memory/1976-2-0x000000000188E000-0x0000000001921000-memory.dmp	family_expiro1
behavioral1/memory/1976-3-0x0000000001140000-0x0000000001921000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1912	1976	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	d3d34d1a3a4965eb58c53651d29d8520_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 1912	1976	d3d34d1a3a4965eb58c53651d29d8520_JaffaCakes118.exe	31
PID 1976 wrote to memory of 1912	1976	d3d34d1a3a4965eb58c53651d29d8520_JaffaCakes118.exe	31
PID 1976 wrote to memory of 1912	1976	d3d34d1a3a4965eb58c53651d29d8520_JaffaCakes118.exe	31
PID 1976 wrote to memory of 1912	1976	d3d34d1a3a4965eb58c53651d29d8520_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\d3d34d1a3a4965eb58c53651d29d8520_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d3d34d1a3a4965eb58c53651d29d8520_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1976 -s 156
  2⤵
  - Program crash
  PID:1912

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/1976-0-0x000000000188E000-0x0000000001921000-memory.dmp

Filesize
588KB

Download
memory/1976-1-0x0000000001140000-0x0000000001921000-memory.dmp

Filesize
7.9MB

Download
memory/1976-2-0x000000000188E000-0x0000000001921000-memory.dmp

Filesize
588KB

Download
memory/1976-3-0x0000000001140000-0x0000000001921000-memory.dmp

Filesize
7.9MB

Download