expiro | bf62e855c7f4eebc89466099b5ef70778e5dcf551e079a405fb531b8dace8798

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
09/01/2025, 15:13

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General

Target

JaffaCakes118_cb59f7e129e7baecf4b3d8079935acbd.exe
Size

457KB
MD5

cb59f7e129e7baecf4b3d8079935acbd
SHA1

c11aab2d305ed4d61ce22c0a511755fe1f6382bb
SHA256

bf62e855c7f4eebc89466099b5ef70778e5dcf551e079a405fb531b8dace8798
SHA512

c919420c2ee8284ed2d59a4a6cf17cd25015ce0bb775fe40b1dd654dd34e0528da96b6464f5c38ff30f53448093923612daac4650f9d6afd8310979e99b01f01
SSDEEP

12288:bchn3w0GvksgzBsF5jZLbCHp9l5yKCZfG:Qhn3w0GvJCBsLj4dyKCZf

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/1768-0-0x0000000010074000-0x0000000010108000-memory.dmp	family_expiro1
behavioral1/memory/1768-1-0x0000000010000000-0x0000000010108000-memory.dmp	family_expiro1
behavioral1/memory/1768-2-0x0000000010074000-0x0000000010108000-memory.dmp	family_expiro1
behavioral1/memory/1768-3-0x0000000010000000-0x0000000010108000-memory.dmp	family_expiro1

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_cb59f7e129e7baecf4b3d8079935acbd.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb59f7e129e7baecf4b3d8079935acbd.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb59f7e129e7baecf4b3d8079935acbd.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1768

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/1768-0-0x0000000010074000-0x0000000010108000-memory.dmp

Filesize
592KB

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memory/1768-1-0x0000000010000000-0x0000000010108000-memory.dmp

Filesize
1.0MB

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memory/1768-2-0x0000000010074000-0x0000000010108000-memory.dmp

Filesize
592KB

Download
memory/1768-3-0x0000000010000000-0x0000000010108000-memory.dmp

Filesize
1.0MB

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