expiro | 6193da9928a776ec36d0d80a457dd81661d5c7eae03348712205b7a4ab08b5a4

Analysis

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

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
05-01-2025 04:04

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General

Target

JaffaCakes118_8a56662db2db74743b2da58dd78e9db1.exe
Size

482KB
MD5

8a56662db2db74743b2da58dd78e9db1
SHA1

3ec56b17d038e917865def246ff954b0b470cf22
SHA256

6193da9928a776ec36d0d80a457dd81661d5c7eae03348712205b7a4ab08b5a4
SHA512

17b0d16f267510a55e841e14dafca252a213a4437c93489667af1c51e694d486fc8d55f36718478f8232e512d00592c84dc1cf1b36f8e5d874792c200737fd50
SSDEEP

12288:WuEeXUaK3PWx+S1Dep+8X6k++sYL6QZVV2Vg4SZ:WuE+UaK3P37ZduQZVQJ

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/2628-0-0x00000000009FC000-0x0000000000A8F000-memory.dmp	family_expiro1
behavioral1/memory/2628-1-0x0000000000980000-0x0000000000A8F000-memory.dmp	family_expiro1
behavioral1/memory/2628-2-0x00000000009FC000-0x0000000000A8F000-memory.dmp	family_expiro1
behavioral1/memory/2628-3-0x0000000000980000-0x0000000000A8F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2368	2628	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_8a56662db2db74743b2da58dd78e9db1.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2628 wrote to memory of 2368	2628	JaffaCakes118_8a56662db2db74743b2da58dd78e9db1.exe	30
PID 2628 wrote to memory of 2368	2628	JaffaCakes118_8a56662db2db74743b2da58dd78e9db1.exe	30
PID 2628 wrote to memory of 2368	2628	JaffaCakes118_8a56662db2db74743b2da58dd78e9db1.exe	30
PID 2628 wrote to memory of 2368	2628	JaffaCakes118_8a56662db2db74743b2da58dd78e9db1.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8a56662db2db74743b2da58dd78e9db1.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8a56662db2db74743b2da58dd78e9db1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2628 -s 132
  2⤵
  - Program crash
  PID:2368

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/2628-0-0x00000000009FC000-0x0000000000A8F000-memory.dmp

Filesize
588KB

Download
memory/2628-1-0x0000000000980000-0x0000000000A8F000-memory.dmp

Filesize
1.1MB

Download
memory/2628-2-0x00000000009FC000-0x0000000000A8F000-memory.dmp

Filesize
588KB

Download
memory/2628-3-0x0000000000980000-0x0000000000A8F000-memory.dmp

Filesize
1.1MB

Download