expiro | 1fe3728fef2f2a8a58ff0ff45ae4d4b6d957d2eed5f2c6636103518818029a1d

General

Target

JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe
Size

60KB
MD5

2d5c72594a039e997ed9a75c71bcfd64
SHA1

23fe5f874ca9a07a560730aef1372e9b567340cc
SHA256

1fe3728fef2f2a8a58ff0ff45ae4d4b6d957d2eed5f2c6636103518818029a1d
SHA512

93a3512c354171626b7be1699b11b69b601c99cfbd189ee23d852419b657fabaffb94359ce876702ad50f85ed3f281b11240fe48f335f676c6b4caf2fbf3961f
SSDEEP

768:hE30e/7tEaWcArSwaydTb0EroSd3QXGsBS4sZFFSUv6GfEK+RsWW2qTN4lvCy2ZL:++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/624-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/624-10-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1796-19-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1796-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1796-22-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1796-23-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1796-25-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/1796-28-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
1496	service180.exe
1796	service180.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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service180.exe"	service180.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service180.exe"	service180.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:	service180.exe
File opened (read-only)	\??\F:	service180.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\\service180.exe"	service180.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service180.exe	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe
File created	C:\Windows\SysWOW64\service180.exe	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4300 set thread context of 624	4300	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	83
PID 1496 set thread context of 1796	1496	service180.exe	86

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_2d5c72594a039e997ed9a75c71bcfd64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service180.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service180.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 624	4300	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	83
PID 4300 wrote to memory of 624	4300	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	83
PID 4300 wrote to memory of 624	4300	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	83
PID 4300 wrote to memory of 624	4300	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	83
PID 4300 wrote to memory of 624	4300	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	83
PID 4300 wrote to memory of 624	4300	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	83
PID 4300 wrote to memory of 624	4300	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	83
PID 624 wrote to memory of 1496	624	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	84
PID 624 wrote to memory of 1496	624	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	84
PID 624 wrote to memory of 1496	624	JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe	84
PID 1496 wrote to memory of 1796	1496	service180.exe	86
PID 1496 wrote to memory of 1796	1496	service180.exe	86
PID 1496 wrote to memory of 1796	1496	service180.exe	86
PID 1496 wrote to memory of 1796	1496	service180.exe	86
PID 1496 wrote to memory of 1796	1496	service180.exe	86
PID 1496 wrote to memory of 1796	1496	service180.exe	86
PID 1496 wrote to memory of 1796	1496	service180.exe	86

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4300
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2d5c72594a039e997ed9a75c71bcfd64.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:624
- - C:\Windows\SysWOW64\service180.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1496
  - - C:\Windows\SysWOW64\service180.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:1796

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\service180.exe

Filesize
60KB

MD5
2d5c72594a039e997ed9a75c71bcfd64

SHA1
23fe5f874ca9a07a560730aef1372e9b567340cc

SHA256
1fe3728fef2f2a8a58ff0ff45ae4d4b6d957d2eed5f2c6636103518818029a1d

SHA512
93a3512c354171626b7be1699b11b69b601c99cfbd189ee23d852419b657fabaffb94359ce876702ad50f85ed3f281b11240fe48f335f676c6b4caf2fbf3961f

Download Submit
memory/624-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/624-10-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/624-1-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/624-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1496-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1796-18-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1796-19-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1796-20-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1796-22-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1796-23-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1796-25-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1796-28-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4300-0-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4300-4-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads