expiro | 2e87027d70f21c674790a5acb19748acfec3d95a2fc660599230829a09a8c8e4

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13-08-2024 16:55

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General

Target

93f1844f0f1df0cb8813ce130b8898da_JaffaCakes118.exe
Size

417KB
MD5

93f1844f0f1df0cb8813ce130b8898da
SHA1

d31074d920714113b3fb96b42d9e20aa4fd362a7
SHA256

2e87027d70f21c674790a5acb19748acfec3d95a2fc660599230829a09a8c8e4
SHA512

f2e56963bcfc43d8acba5bee96659b7eaff8524276c1c5304d4b306818251a0a366d30bdb5471cf2334d1ba7c5f7840408c10947246efe77462784cd42adcc05
SSDEEP

6144:ZSpwTxz8fEYga22UHHXyDArvBIM6zOI3ONgEox946lzmEZYS5+oj9COdbeOut8MQ:w+lAfEYAtHCDArvxeO/jo46hjYJQ0mN

Score

10^/10

expiro backdoor discovery

Malware Config

Signatures

Expiro, m0yv
Expiro aka m0yv is a multi-functional backdoor written in C++.
backdoor expiro

Expiro payload 3 IoCs

backdoor

resource	yara_rule
behavioral1/memory/2956-0-0x00000000002DC000-0x000000000036F000-memory.dmp	family_expiro1
behavioral1/memory/2956-1-0x0000000000270000-0x000000000036F000-memory.dmp	family_expiro1
behavioral1/memory/2956-2-0x00000000002DC000-0x000000000036F000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2476	2956	WerFault.exe	30

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	93f1844f0f1df0cb8813ce130b8898da_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 2476	2956	93f1844f0f1df0cb8813ce130b8898da_JaffaCakes118.exe	31
PID 2956 wrote to memory of 2476	2956	93f1844f0f1df0cb8813ce130b8898da_JaffaCakes118.exe	31
PID 2956 wrote to memory of 2476	2956	93f1844f0f1df0cb8813ce130b8898da_JaffaCakes118.exe	31
PID 2956 wrote to memory of 2476	2956	93f1844f0f1df0cb8813ce130b8898da_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\93f1844f0f1df0cb8813ce130b8898da_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\93f1844f0f1df0cb8813ce130b8898da_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2956 -s 68
  2⤵
  - Program crash
  PID:2476

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/2956-0-0x00000000002DC000-0x000000000036F000-memory.dmp

Filesize
588KB

Download
memory/2956-1-0x0000000000270000-0x000000000036F000-memory.dmp

Filesize
1020KB

Download
memory/2956-2-0x00000000002DC000-0x000000000036F000-memory.dmp

Filesize
588KB

Download