expiro | 3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31/12/2024, 22:22

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General

Target

JaffaCakes118_3acd3697cb4c6a2dd4426380acc277e7.exe
Size

417KB
MD5

3acd3697cb4c6a2dd4426380acc277e7
SHA1

216f64f99559602631872efa71a3499ef395710a
SHA256

3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b
SHA512

f258c3120300e8d92d425f82a993df044c434662fb876d6497160e607111850f85caec4b99784a30dc99ccf5b7236c13d87d0172891b8d00771eea2f391a01bf
SSDEEP

6144:6SpwTEOzPSK5U2SoJ8VWack7V1ZmXRWLgKocUq8nOfaIROo71YvK09lw+45B:N+IK5U2SoysomwLQcUqgsPBYv745B

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/3016-0-0x0000000000D8C000-0x0000000000E1F000-memory.dmp	family_expiro1
behavioral1/memory/3016-1-0x0000000000D20000-0x0000000000E1F000-memory.dmp	family_expiro1
behavioral1/memory/3016-2-0x0000000000D8C000-0x0000000000E1F000-memory.dmp	family_expiro1
behavioral1/memory/3016-3-0x0000000000D20000-0x0000000000E1F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2096	3016	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_3acd3697cb4c6a2dd4426380acc277e7.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 2096	3016	JaffaCakes118_3acd3697cb4c6a2dd4426380acc277e7.exe	30
PID 3016 wrote to memory of 2096	3016	JaffaCakes118_3acd3697cb4c6a2dd4426380acc277e7.exe	30
PID 3016 wrote to memory of 2096	3016	JaffaCakes118_3acd3697cb4c6a2dd4426380acc277e7.exe	30
PID 3016 wrote to memory of 2096	3016	JaffaCakes118_3acd3697cb4c6a2dd4426380acc277e7.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3acd3697cb4c6a2dd4426380acc277e7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3acd3697cb4c6a2dd4426380acc277e7.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3016 -s 68
  2⤵
  - Program crash
  PID:2096

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/3016-0-0x0000000000D8C000-0x0000000000E1F000-memory.dmp

Filesize
588KB

Download
memory/3016-1-0x0000000000D20000-0x0000000000E1F000-memory.dmp

Filesize
1020KB

Download
memory/3016-2-0x0000000000D8C000-0x0000000000E1F000-memory.dmp

Filesize
588KB

Download
memory/3016-3-0x0000000000D20000-0x0000000000E1F000-memory.dmp

Filesize
1020KB

Download