expiro | 25c96c472885d5bae11e5c22f8e0d04f7f8c211b63112b09dc16567a17578f06

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06/12/2024, 08:22

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General

Target

cbf9d83b89ab5631e4b316a9102d31d0_JaffaCakes118.exe
Size

437KB
MD5

cbf9d83b89ab5631e4b316a9102d31d0
SHA1

b97960ee139a0e5398c317d71adde0ef4e8b0361
SHA256

25c96c472885d5bae11e5c22f8e0d04f7f8c211b63112b09dc16567a17578f06
SHA512

91e6cd191b0268801ecd48ca79d34241601e3a7ab5e60a44f706775499e3372d2d62da53519cd3f21f902cf0b85766ebca6d715a78d7d2ab7b1c9f25485e3650
SSDEEP

6144:UwBwm2oz8fEYga22UHHXyDArvBIM6zOW3ONgEox946lzmEZYS5+oj9COdbeOut8r:AroAfEYAtHCDArvxeOJjo46hjYJQ0mN

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/1292-0-0x0000000001080000-0x0000000001114000-memory.dmp	family_expiro1
behavioral1/memory/1292-1-0x0000000001010000-0x0000000001114000-memory.dmp	family_expiro1
behavioral1/memory/1292-2-0x0000000001080000-0x0000000001114000-memory.dmp	family_expiro1
behavioral1/memory/1292-3-0x0000000001010000-0x0000000001114000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2388	1292	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	cbf9d83b89ab5631e4b316a9102d31d0_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1292 wrote to memory of 2388	1292	cbf9d83b89ab5631e4b316a9102d31d0_JaffaCakes118.exe	30
PID 1292 wrote to memory of 2388	1292	cbf9d83b89ab5631e4b316a9102d31d0_JaffaCakes118.exe	30
PID 1292 wrote to memory of 2388	1292	cbf9d83b89ab5631e4b316a9102d31d0_JaffaCakes118.exe	30
PID 1292 wrote to memory of 2388	1292	cbf9d83b89ab5631e4b316a9102d31d0_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\cbf9d83b89ab5631e4b316a9102d31d0_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cbf9d83b89ab5631e4b316a9102d31d0_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1292
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1292 -s 160
  2⤵
  - Program crash
  PID:2388

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/1292-0-0x0000000001080000-0x0000000001114000-memory.dmp

Filesize
592KB

Download
memory/1292-1-0x0000000001010000-0x0000000001114000-memory.dmp

Filesize
1.0MB

Download
memory/1292-2-0x0000000001080000-0x0000000001114000-memory.dmp

Filesize
592KB

Download
memory/1292-3-0x0000000001010000-0x0000000001114000-memory.dmp

Filesize
1.0MB

Download