expiro | a218a1edcd7e5f4e384c412fc45c2e7917a69c7d041d99700c54efa23c55a722

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
10-01-2025 05:23

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General

Target

JaffaCakes118_dc07333a28090eff485feb5b5c153533.exe
Size

411KB
MD5

dc07333a28090eff485feb5b5c153533
SHA1

ef25a413a6c1f267e58b44b180df8988e9eec8b5
SHA256

a218a1edcd7e5f4e384c412fc45c2e7917a69c7d041d99700c54efa23c55a722
SHA512

345efc72999e8fbdc8c0ec9942bfd83a0448fcb2c7e010dbbfea4b880a93cf3eb78d74cad15a657d504c1082f9eeac618a39d5c37ee3cc228bd5d7cb832be5ba
SSDEEP

12288:betLagza/unbxptKNWXkVTTM5ct0bDMT:bettMMbxpMNMk12c20T

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/2764-0-0x0000000000FDB000-0x000000000106E000-memory.dmp	family_expiro1
behavioral1/memory/2764-1-0x0000000000F70000-0x000000000106E000-memory.dmp	family_expiro1
behavioral1/memory/2764-2-0x0000000000FDB000-0x000000000106E000-memory.dmp	family_expiro1
behavioral1/memory/2764-3-0x0000000000F70000-0x000000000106E000-memory.dmp	family_expiro1

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2904	2764	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	JaffaCakes118_dc07333a28090eff485feb5b5c153533.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 2904	2764	JaffaCakes118_dc07333a28090eff485feb5b5c153533.exe	30
PID 2764 wrote to memory of 2904	2764	JaffaCakes118_dc07333a28090eff485feb5b5c153533.exe	30
PID 2764 wrote to memory of 2904	2764	JaffaCakes118_dc07333a28090eff485feb5b5c153533.exe	30
PID 2764 wrote to memory of 2904	2764	JaffaCakes118_dc07333a28090eff485feb5b5c153533.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dc07333a28090eff485feb5b5c153533.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dc07333a28090eff485feb5b5c153533.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2764 -s 96
  2⤵
  - Program crash
  PID:2904

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/2764-0-0x0000000000FDB000-0x000000000106E000-memory.dmp

Filesize
588KB

Download
memory/2764-1-0x0000000000F70000-0x000000000106E000-memory.dmp

Filesize
1016KB

Download
memory/2764-2-0x0000000000FDB000-0x000000000106E000-memory.dmp

Filesize
588KB

Download
memory/2764-3-0x0000000000F70000-0x000000000106E000-memory.dmp

Filesize
1016KB

Download