expiro | 1d28df72e9d30b4a84070717d899e6f6ab14669cfe0d454cefc47fa945cdee28

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
09-12-2024 10:01

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General

Target

d91121b29f04792626f1b1b6c5212787_JaffaCakes118.exe
Size

417KB
MD5

d91121b29f04792626f1b1b6c5212787
SHA1

4f0f3bae05356135df4ef26a01731efe4475010d
SHA256

1d28df72e9d30b4a84070717d899e6f6ab14669cfe0d454cefc47fa945cdee28
SHA512

32aab9d86693cd3666653d76590d303c90057f0f476dd89d73ac8cf015a305a73dbe1d492a6c04ecea831593bbd6f5e8efddd8478ad514b8e3154f377a124de2
SSDEEP

6144:oSpwTxz8fEYga22UHHXyDArvBIM6zOb3ONgEox946lzmEZYS5+oj9COdbeOut8MQ:f+lAfEYAtHCDArvxeOmjo46hjYJQ0mN

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/2200-0-0x000000000010C000-0x000000000019F000-memory.dmp	family_expiro1
behavioral1/memory/2200-1-0x00000000000A0000-0x000000000019F000-memory.dmp	family_expiro1
behavioral1/memory/2200-2-0x000000000010C000-0x000000000019F000-memory.dmp	family_expiro1
behavioral1/memory/2200-3-0x00000000000A0000-0x000000000019F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1080	2200	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	d91121b29f04792626f1b1b6c5212787_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 1080	2200	d91121b29f04792626f1b1b6c5212787_JaffaCakes118.exe	30
PID 2200 wrote to memory of 1080	2200	d91121b29f04792626f1b1b6c5212787_JaffaCakes118.exe	30
PID 2200 wrote to memory of 1080	2200	d91121b29f04792626f1b1b6c5212787_JaffaCakes118.exe	30
PID 2200 wrote to memory of 1080	2200	d91121b29f04792626f1b1b6c5212787_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\d91121b29f04792626f1b1b6c5212787_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d91121b29f04792626f1b1b6c5212787_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2200 -s 68
  2⤵
  - Program crash
  PID:1080

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/2200-0-0x000000000010C000-0x000000000019F000-memory.dmp

Filesize
588KB

Download
memory/2200-1-0x00000000000A0000-0x000000000019F000-memory.dmp

Filesize
1020KB

Download
memory/2200-2-0x000000000010C000-0x000000000019F000-memory.dmp

Filesize
588KB

Download
memory/2200-3-0x00000000000A0000-0x000000000019F000-memory.dmp

Filesize
1020KB

Download