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
behavioral2/memory/1720-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1720-9-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3432-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3432-21-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3432-23-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3432-27-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3432-28-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/3432-35-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
2848	service212.exe
3432	service212.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-1-5-21-1294999112-580688058-1763548717-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service212.exe"	service212.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service212.exe"	service212.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:	service212.exe
File opened (read-only)	\??\F:	service212.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\\service212.exe"	service212.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service212.exe	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe
File created	C:\Windows\SysWOW64\service212.exe	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1704 set thread context of 1720	1704	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	90
PID 2848 set thread context of 3432	2848	service212.exe	92

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	service212.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service212.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1704 wrote to memory of 1720	1704	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	90
PID 1704 wrote to memory of 1720	1704	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	90
PID 1704 wrote to memory of 1720	1704	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	90
PID 1704 wrote to memory of 1720	1704	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	90
PID 1704 wrote to memory of 1720	1704	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	90
PID 1704 wrote to memory of 1720	1704	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	90
PID 1704 wrote to memory of 1720	1704	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	90
PID 1720 wrote to memory of 2848	1720	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	91
PID 1720 wrote to memory of 2848	1720	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	91
PID 1720 wrote to memory of 2848	1720	JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe	91
PID 2848 wrote to memory of 3432	2848	service212.exe	92
PID 2848 wrote to memory of 3432	2848	service212.exe	92
PID 2848 wrote to memory of 3432	2848	service212.exe	92
PID 2848 wrote to memory of 3432	2848	service212.exe	92
PID 2848 wrote to memory of 3432	2848	service212.exe	92
PID 2848 wrote to memory of 3432	2848	service212.exe	92
PID 2848 wrote to memory of 3432	2848	service212.exe	92

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:1704
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_20208e178fc9c734f1c83805d3f71b23.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1720
- - C:\Windows\SysWOW64\service212.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2848
  - - C:\Windows\SysWOW64\service212.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:3432

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

Replay Monitor

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Downloads

C:\Windows\SysWOW64\service212.exe

Filesize
60KB

MD5
20208e178fc9c734f1c83805d3f71b23

SHA1
7a9059de9a4eeec317b7b45df96647cc13d77bd3

SHA256
39ba6d4095e2d701904fd0bd2295c371724293b101d7fae886d6bc21dd5439a8

SHA512
25ffa27328bd4fd69b0be37c59401e92a5e2f2509774e81c847e0a9b77d34788479952a9803e9c83bf5e2ae94d94a4f65b784bafbf80429eaca40008397872e9

Download Submit
memory/1704-0-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1704-3-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1720-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1720-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1720-4-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1720-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2848-16-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/3432-20-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3432-21-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3432-23-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3432-27-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3432-28-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3432-35-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads