expiro | 39ba6d4095e2d701904fd0bd2295c371724293b101d7fae886d6bc21dd5439a8

General

Target

JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe
Size

60KB
MD5

20208e178fc9c734f1c83805d3f71b23
SHA1

7a9059de9a4eeec317b7b45df96647cc13d77bd3
SHA256

39ba6d4095e2d701904fd0bd2295c371724293b101d7fae886d6bc21dd5439a8
SHA512

25ffa27328bd4fd69b0be37c59401e92a5e2f2509774e81c847e0a9b77d34788479952a9803e9c83bf5e2ae94d94a4f65b784bafbf80429eaca40008397872e9
SSDEEP

768:zE30e/7tEaWcArSwaydTb0EroSd3QXGsBS4sZFFSUv6GfEK+RsWW2qTN4lvCy2ZL:M+PeXonnUStQXDI4spvVp+N8NECtH3T

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 8 IoCs

backdoor

resource	yara_rule
behavioral1/memory/2384-13-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2384-15-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2384-27-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2864-44-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2864-43-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2864-45-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2864-46-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral1/memory/2864-49-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
2092	service218.exe
2864	service218.exe

Loads dropped DLL 2 IoCs

pid	Process
2384	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe
2384	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.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\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service218.exe"	service218.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service218.exe"	service218.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:	service218.exe
File opened (read-only)	\??\F:	service218.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\\service218.exe"	service218.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\service218.exe	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe
File opened for modification	C:\Windows\SysWOW64\service218.exe	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2188 set thread context of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2092 set thread context of 2864	2092	service218.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_20208e178fc9c734f1c83805d3f71b23.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service218.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service218.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2188 wrote to memory of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2188 wrote to memory of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2188 wrote to memory of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2188 wrote to memory of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2188 wrote to memory of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2188 wrote to memory of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2188 wrote to memory of 2384	2188	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	30
PID 2384 wrote to memory of 2092	2384	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	31
PID 2384 wrote to memory of 2092	2384	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	31
PID 2384 wrote to memory of 2092	2384	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	31
PID 2384 wrote to memory of 2092	2384	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	31
PID 2092 wrote to memory of 2864	2092	service218.exe	32
PID 2092 wrote to memory of 2864	2092	service218.exe	32
PID 2092 wrote to memory of 2864	2092	service218.exe	32
PID 2092 wrote to memory of 2864	2092	service218.exe	32
PID 2092 wrote to memory of 2864	2092	service218.exe	32
PID 2092 wrote to memory of 2864	2092	service218.exe	32
PID 2092 wrote to memory of 2864	2092	service218.exe	32
PID 2092 wrote to memory of 2864	2092	service218.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2384
- - C:\Windows\SysWOW64\service218.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2092
  - - C:\Windows\SysWOW64\service218.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:2864

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\service218.exe

Filesize
60KB

MD5
20208e178fc9c734f1c83805d3f71b23

SHA1
7a9059de9a4eeec317b7b45df96647cc13d77bd3

SHA256
39ba6d4095e2d701904fd0bd2295c371724293b101d7fae886d6bc21dd5439a8

SHA512
25ffa27328bd4fd69b0be37c59401e92a5e2f2509774e81c847e0a9b77d34788479952a9803e9c83bf5e2ae94d94a4f65b784bafbf80429eaca40008397872e9

Download Submit
memory/2092-40-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/2188-11-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/2188-0-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/2384-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2384-27-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2384-12-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2384-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2384-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2384-15-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2384-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2384-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2384-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2864-43-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2864-44-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2864-45-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2864-46-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2864-49-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads