expiro | 28aad1239f02b00a79a7ae67feca4f9b41d8ab40710855b2142d03c81500b422

General

Target

JaffaCakes118_cb69584111a561a5896145438b009024.exe
Size

88KB
MD5

cb69584111a561a5896145438b009024
SHA1

5a05dbfeb616acbe102d3ad1f9ff5387e2c50bdb
SHA256

28aad1239f02b00a79a7ae67feca4f9b41d8ab40710855b2142d03c81500b422
SHA512

9e5b060dfa66ad7743b3e7602b2d45255284b47cd2a2809889312de6d92c74ca771346fa815f4b95d917dcec4fff89f593861f34f04e260003b714b112a3a056
SSDEEP

1536:XXPeXonnUStQXDI4spvVp+N8NECtH3/ItaRmtmhDA2B/w:XAgnUStM0BFn+N8FP2acIhDp

Score

10^/10

expiro backdoor discovery persistence

Malware Config

Signatures

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

Expiro payload 10 IoCs

backdoor

resource	yara_rule
behavioral1/memory/2684-14-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2684-26-0x0000000000270000-0x000000000028E000-memory.dmp	family_expiro2
behavioral1/memory/2684-29-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2740-46-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2740-45-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2740-47-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2740-48-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2740-51-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2740-54-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2740-60-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
2688	service127.exe
2740	service127.exe

Loads dropped DLL 2 IoCs

pid	Process
2684	JaffaCakes118_cb69584111a561a5896145438b009024.exe
2684	JaffaCakes118_cb69584111a561a5896145438b009024.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service127.exe"	service127.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service127.exe"	service127.exe

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\D:	service127.exe
File opened (read-only)	\??\F:	service127.exe

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service127.exe"	service127.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service127.exe	JaffaCakes118_cb69584111a561a5896145438b009024.exe
File created	C:\Windows\SysWOW64\service127.exe	JaffaCakes118_cb69584111a561a5896145438b009024.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3040 set thread context of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 2688 set thread context of 2740	2688	service127.exe	32

System Location Discovery: System Language Discovery 1 TTPs 4 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_cb69584111a561a5896145438b009024.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_cb69584111a561a5896145438b009024.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service127.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service127.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 3040 wrote to memory of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 3040 wrote to memory of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 3040 wrote to memory of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 3040 wrote to memory of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 3040 wrote to memory of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 3040 wrote to memory of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 3040 wrote to memory of 2684	3040	JaffaCakes118_cb69584111a561a5896145438b009024.exe	30
PID 2684 wrote to memory of 2688	2684	JaffaCakes118_cb69584111a561a5896145438b009024.exe	31
PID 2684 wrote to memory of 2688	2684	JaffaCakes118_cb69584111a561a5896145438b009024.exe	31
PID 2684 wrote to memory of 2688	2684	JaffaCakes118_cb69584111a561a5896145438b009024.exe	31
PID 2684 wrote to memory of 2688	2684	JaffaCakes118_cb69584111a561a5896145438b009024.exe	31
PID 2688 wrote to memory of 2740	2688	service127.exe	32
PID 2688 wrote to memory of 2740	2688	service127.exe	32
PID 2688 wrote to memory of 2740	2688	service127.exe	32
PID 2688 wrote to memory of 2740	2688	service127.exe	32
PID 2688 wrote to memory of 2740	2688	service127.exe	32
PID 2688 wrote to memory of 2740	2688	service127.exe	32
PID 2688 wrote to memory of 2740	2688	service127.exe	32
PID 2688 wrote to memory of 2740	2688	service127.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb69584111a561a5896145438b009024.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb69584111a561a5896145438b009024.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb69584111a561a5896145438b009024.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_cb69584111a561a5896145438b009024.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2684
- - C:\Windows\SysWOW64\service127.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2688
  - - C:\Windows\SysWOW64\service127.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:2740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Windows\SysWOW64\service127.exe

Filesize
88KB

MD5
cb69584111a561a5896145438b009024

SHA1
5a05dbfeb616acbe102d3ad1f9ff5387e2c50bdb

SHA256
28aad1239f02b00a79a7ae67feca4f9b41d8ab40710855b2142d03c81500b422

SHA512
9e5b060dfa66ad7743b3e7602b2d45255284b47cd2a2809889312de6d92c74ca771346fa815f4b95d917dcec4fff89f593861f34f04e260003b714b112a3a056

Download Submit
memory/2684-26-0x0000000000270000-0x000000000028E000-memory.dmp

Filesize
120KB

Download
memory/2684-23-0x0000000000270000-0x000000000028E000-memory.dmp

Filesize
120KB

Download
memory/2684-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2684-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2684-14-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2684-12-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2684-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2684-29-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2684-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2684-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2688-42-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2740-51-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2740-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2740-46-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2740-45-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2740-47-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2740-48-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2740-54-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3040-0-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3040-10-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads