expiro | 8720146db6a418fdefe4602194e964e20757ac94534ce46fceb1d81f25b703a1

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
15/12/2024, 20:18

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General

Target

f598e83290563b39c342602c4258c3b5_JaffaCakes118.exe
Size

7.3MB
MD5

f598e83290563b39c342602c4258c3b5
SHA1

d855933557bd5145708715a4e89d8282c69507cc
SHA256

8720146db6a418fdefe4602194e964e20757ac94534ce46fceb1d81f25b703a1
SHA512

977a596f00cc61b910e310d52f092c11697f392d2a0e3f998eaa3ca855c4316ea3f42d258d0b27071dd7485ab20a92d9375836f9444c1e80ed4a01cc1e09bb09
SSDEEP

98304:yxC3ud6MOIvysiwCQKzo5qphIHVruP3WpF3UdE1hZHEdLF6mil+:VGQFMkhgJuP32+dmhZk/4

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/2104-0-0x0000000000FBE000-0x0000000001051000-memory.dmp	family_expiro1
behavioral1/memory/2104-1-0x0000000000870000-0x0000000001051000-memory.dmp	family_expiro1
behavioral1/memory/2104-2-0x0000000000FBE000-0x0000000001051000-memory.dmp	family_expiro1
behavioral1/memory/2104-3-0x0000000000870000-0x0000000001051000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2608	2104	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	f598e83290563b39c342602c4258c3b5_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 2608	2104	f598e83290563b39c342602c4258c3b5_JaffaCakes118.exe	30
PID 2104 wrote to memory of 2608	2104	f598e83290563b39c342602c4258c3b5_JaffaCakes118.exe	30
PID 2104 wrote to memory of 2608	2104	f598e83290563b39c342602c4258c3b5_JaffaCakes118.exe	30
PID 2104 wrote to memory of 2608	2104	f598e83290563b39c342602c4258c3b5_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\f598e83290563b39c342602c4258c3b5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f598e83290563b39c342602c4258c3b5_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2104 -s 156
  2⤵
  - Program crash
  PID:2608

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/2104-0-0x0000000000FBE000-0x0000000001051000-memory.dmp

Filesize
588KB

Download
memory/2104-1-0x0000000000870000-0x0000000001051000-memory.dmp

Filesize
7.9MB

Download
memory/2104-2-0x0000000000FBE000-0x0000000001051000-memory.dmp

Filesize
588KB

Download
memory/2104-3-0x0000000000870000-0x0000000001051000-memory.dmp

Filesize
7.9MB

Download