expiro | 74a187f412deae4220360da0f0bf18e4d4ef6eacff55f8899b029db9ab5e74d3

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-02-2025 02:09

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General

Target

2025-02-14_b30fc40f60729c4e14e8d7276d47b9fe_magniber.exe
Size

1.9MB
MD5

b30fc40f60729c4e14e8d7276d47b9fe
SHA1

fd15c0c7750ebee85ff224920450539b61499392
SHA256

74a187f412deae4220360da0f0bf18e4d4ef6eacff55f8899b029db9ab5e74d3
SHA512

86bd4959cefe624b3d7969f0ccb0f538e4531f4bee1ac58f65ca99aadf3f4df58070414014308ac92d58f669916d7a525e67908dca83354158184e92f272e07b
SSDEEP

49152:ry6qY5DKxS9solEvv2l9/G7irIfu4xuaRPGb+xJ9P2Y8cvT:ryxJq/trIfuERPAu9wcv

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/3032-0-0x0000000000D24000-0x0000000000DB8000-memory.dmp	family_expiro1
behavioral1/memory/3032-1-0x0000000000B40000-0x0000000000DB8000-memory.dmp	family_expiro1
behavioral1/memory/3032-2-0x0000000000D24000-0x0000000000DB8000-memory.dmp	family_expiro1
behavioral1/memory/3032-3-0x0000000000B40000-0x0000000000DB8000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2736	3032	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	2025-02-14_b30fc40f60729c4e14e8d7276d47b9fe_magniber.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2736	3032	2025-02-14_b30fc40f60729c4e14e8d7276d47b9fe_magniber.exe	30
PID 3032 wrote to memory of 2736	3032	2025-02-14_b30fc40f60729c4e14e8d7276d47b9fe_magniber.exe	30
PID 3032 wrote to memory of 2736	3032	2025-02-14_b30fc40f60729c4e14e8d7276d47b9fe_magniber.exe	30
PID 3032 wrote to memory of 2736	3032	2025-02-14_b30fc40f60729c4e14e8d7276d47b9fe_magniber.exe	30

C:\Users\Admin\AppData\Local\Temp\2025-02-14_b30fc40f60729c4e14e8d7276d47b9fe_magniber.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-14_b30fc40f60729c4e14e8d7276d47b9fe_magniber.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3032 -s 244
  2⤵
  - Program crash
  PID:2736

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/3032-0-0x0000000000D24000-0x0000000000DB8000-memory.dmp

Filesize
592KB

Download
memory/3032-1-0x0000000000B40000-0x0000000000DB8000-memory.dmp

Filesize
2.5MB

Download
memory/3032-2-0x0000000000D24000-0x0000000000DB8000-memory.dmp

Filesize
592KB

Download
memory/3032-3-0x0000000000B40000-0x0000000000DB8000-memory.dmp

Filesize
2.5MB

Download