expiro | 45adb3afd017026adc61e4b72f24c3978d875c96798d7a771d6c203f7bd1db53

General

Target

JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe
Size

124KB
MD5

ae2a6ff3181f19d491db712c80200ad7
SHA1

7f462f4c9175bdd2f2eb69f774ba918d1833befc
SHA256

45adb3afd017026adc61e4b72f24c3978d875c96798d7a771d6c203f7bd1db53
SHA512

f45689df4f5c1c757f050b83e920831522e5ed2858e2e4e785642cf56c54f418171d35e5d7feb0b966f0955c7b97ecbca74d30afdbe4b92f5de4ab08e04c00f0
SSDEEP

768:RE30e/7tEaWcArSwaydTb0EroSd3QXGsBS4sZFFSUv6GfEK+RsWW2qTN4lvCy2Zv:u+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 9 IoCs

backdoor

resource	yara_rule
behavioral2/memory/528-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/528-9-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/820-19-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/820-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/820-22-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/820-25-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/820-26-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/820-30-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/820-35-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
1472	service117.exe
820	service117.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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service117.exe"	service117.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service117.exe"	service117.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:	service117.exe
File opened (read-only)	\??\F:	service117.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\\service117.exe"	service117.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service117.exe	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe
File created	C:\Windows\SysWOW64\service117.exe	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1736 set thread context of 528	1736	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	82
PID 1472 set thread context of 820	1472	service117.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	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service117.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service117.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 528	1736	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	82
PID 1736 wrote to memory of 528	1736	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	82
PID 1736 wrote to memory of 528	1736	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	82
PID 1736 wrote to memory of 528	1736	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	82
PID 1736 wrote to memory of 528	1736	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	82
PID 1736 wrote to memory of 528	1736	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	82
PID 1736 wrote to memory of 528	1736	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	82
PID 528 wrote to memory of 1472	528	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	83
PID 528 wrote to memory of 1472	528	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	83
PID 528 wrote to memory of 1472	528	JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe	83
PID 1472 wrote to memory of 820	1472	service117.exe	84
PID 1472 wrote to memory of 820	1472	service117.exe	84
PID 1472 wrote to memory of 820	1472	service117.exe	84
PID 1472 wrote to memory of 820	1472	service117.exe	84
PID 1472 wrote to memory of 820	1472	service117.exe	84
PID 1472 wrote to memory of 820	1472	service117.exe	84
PID 1472 wrote to memory of 820	1472	service117.exe	84

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1736
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ae2a6ff3181f19d491db712c80200ad7.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:528
- - C:\Windows\SysWOW64\service117.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1472
  - - C:\Windows\SysWOW64\service117.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:820

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\service117.exe

Filesize
124KB

MD5
ae2a6ff3181f19d491db712c80200ad7

SHA1
7f462f4c9175bdd2f2eb69f774ba918d1833befc

SHA256
45adb3afd017026adc61e4b72f24c3978d875c96798d7a771d6c203f7bd1db53

SHA512
f45689df4f5c1c757f050b83e920831522e5ed2858e2e4e785642cf56c54f418171d35e5d7feb0b966f0955c7b97ecbca74d30afdbe4b92f5de4ab08e04c00f0

Download Submit
memory/528-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/528-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/528-4-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/528-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/820-19-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/820-20-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/820-22-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/820-25-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/820-26-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/820-30-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/820-35-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1472-17-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1736-0-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1736-3-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads