expiro | 329666ffd3da4182c522530d196d15498ca39801d2c662a26b583eb2b09fd66e

Analysis

max time kernel
15s
max time network
17s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
30/08/2024, 08:00

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General

Target
ca751d2be8e93a84ec6815635b90b5d4_JaffaCakes118.exe
Size 19.5MB
Sample240830-jv136stdlg
SHA256 329666ffd3da4182c522530d196d15498ca39801d2c662a26b583eb2b09fd66e
MD5 ca751d2be8e93a84ec6815635b90b5d4
SHA1 78ed09e36cf43c3a1adc52cc7f4e0862885415eb
SHA512 a59a5b9f2f073b14a84ab6353a0d205d2353b2a32b722dec84a2db10d65b5c51b4669d1b32c6e825eb705a3878c3643e82bb3b6a4fd5a95f5225cf85b120231f
SSDEEP 393216:tlHZI2hMQdB7H/hUfaCVjTPEtOSNVW8ImMyX5/4BaPBr7rt2Rq:D1M4B7CC2AtjXImNXZ4c5kRq
MD5 SHA1 SHA512 SSDEEP

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/1496-0-0x000000000204B000-0x00000000020DE000-memory.dmp	family_expiro1
behavioral1/memory/1496-1-0x0000000000CC0000-0x00000000020DE000-memory.dmp	family_expiro1
behavioral1/memory/1496-2-0x000000000204B000-0x00000000020DE000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1964	1496	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	ca751d2be8e93a84ec6815635b90b5d4_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1496 wrote to memory of 1964	1496	ca751d2be8e93a84ec6815635b90b5d4_JaffaCakes118.exe	30
PID 1496 wrote to memory of 1964	1496	ca751d2be8e93a84ec6815635b90b5d4_JaffaCakes118.exe	30
PID 1496 wrote to memory of 1964	1496	ca751d2be8e93a84ec6815635b90b5d4_JaffaCakes118.exe	30
PID 1496 wrote to memory of 1964	1496	ca751d2be8e93a84ec6815635b90b5d4_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\ca751d2be8e93a84ec6815635b90b5d4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ca751d2be8e93a84ec6815635b90b5d4_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1496 -s 124
  2⤵
  - Program crash
  PID:1964

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/1496-0-0x000000000204B000-0x00000000020DE000-memory.dmp

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memory/1496-1-0x0000000000CC0000-0x00000000020DE000-memory.dmp

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memory/1496-2-0x000000000204B000-0x00000000020DE000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads