expiro | b48f9ff9f9638001e269ba19259a77500a17907f2dc7dcd86bcbe720b178d2f8

General

Target

e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe
Size

128KB
MD5

e022e074c29608aa626bd4894a68680f
SHA1

2a02466b1fb3d289bbe7ed20ced8bfb94ba50f6c
SHA256

b48f9ff9f9638001e269ba19259a77500a17907f2dc7dcd86bcbe720b178d2f8
SHA512

a3e592c2294cba98e93180beacc9f7be20cfe55aa3438fa80683ca0df8cbef72cdc6bf8f98aa68843516f07ee24f6fa0abe7259bc51ee4421d7e809adfd156ab
SSDEEP

768:tE30u/7tEaWcArSwaydTb0EroSd3QXGsBS4sZFFSUv6GfEK+RsWW2qTN4lvCy2Zv:a+PeXonnUStQXDI4spvVp+N8NECtH3

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 6 IoCs

backdoor

resource	yara_rule
behavioral2/memory/4700-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4700-9-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1440-21-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1440-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1440-23-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1440-26-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
3984	service181.exe
1440	service181.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service181.exe"	service181.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service181.exe"	service181.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)	\??\F:	service181.exe
File opened (read-only)	\??\D:	service181.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\\service181.exe"	service181.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service181.exe	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\service181.exe	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 440 set thread context of 4700	440	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	82
PID 3984 set thread context of 1440	3984	service181.exe	84

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	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service181.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service181.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 440 wrote to memory of 4700	440	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	82
PID 440 wrote to memory of 4700	440	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	82
PID 440 wrote to memory of 4700	440	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	82
PID 440 wrote to memory of 4700	440	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	82
PID 440 wrote to memory of 4700	440	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	82
PID 440 wrote to memory of 4700	440	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	82
PID 440 wrote to memory of 4700	440	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	82
PID 4700 wrote to memory of 3984	4700	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	83
PID 4700 wrote to memory of 3984	4700	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	83
PID 4700 wrote to memory of 3984	4700	e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe	83
PID 3984 wrote to memory of 1440	3984	service181.exe	84
PID 3984 wrote to memory of 1440	3984	service181.exe	84
PID 3984 wrote to memory of 1440	3984	service181.exe	84
PID 3984 wrote to memory of 1440	3984	service181.exe	84
PID 3984 wrote to memory of 1440	3984	service181.exe	84
PID 3984 wrote to memory of 1440	3984	service181.exe	84
PID 3984 wrote to memory of 1440	3984	service181.exe	84

C:\Users\Admin\AppData\Local\Temp\e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:440
- C:\Users\Admin\AppData\Local\Temp\e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\e022e074c29608aa626bd4894a68680f_JaffaCakes118.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Windows\SysWOW64\service181.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3984
  - - C:\Windows\SysWOW64\service181.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:1440

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

C:\Windows\SysWOW64\service181.exe

Filesize
128KB

MD5
e022e074c29608aa626bd4894a68680f

SHA1
2a02466b1fb3d289bbe7ed20ced8bfb94ba50f6c

SHA256
b48f9ff9f9638001e269ba19259a77500a17907f2dc7dcd86bcbe720b178d2f8

SHA512
a3e592c2294cba98e93180beacc9f7be20cfe55aa3438fa80683ca0df8cbef72cdc6bf8f98aa68843516f07ee24f6fa0abe7259bc51ee4421d7e809adfd156ab

Download Submit
memory/440-4-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/440-0-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1440-17-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1440-21-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1440-20-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1440-23-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1440-26-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3984-19-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/4700-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4700-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4700-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4700-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads