expiro | 526a9e75fe5ccd6768918f4e19f622d1fa6df74d9420710ebdb9fc3eb753d176

Analysis

max time kernel
144s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
24/07/2024, 11:17

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General

Target
6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe
Size 104KB
Sample240724-ndt1ratdkn
SHA256 526a9e75fe5ccd6768918f4e19f622d1fa6df74d9420710ebdb9fc3eb753d176
MD5 6b695dcdca8cd51ecdffc7d68a1e16fd
SHA1 570d8a37acad639cf2dbbb1e6d51426e219b2821
SHA512 2c53d6c67397e06f05ad8973f31a6adfbc452d9194aafba84ff29dfad23411d343bc06595ffa3ca3aa687143cf29a86f3f19a7e2a03f9ec40e17469fab6923b4
SSDEEP 768:3kWXT7zWf69DQcvi1LcO8UoPIj4X9gqm+3lRf03NDKgj6+58nIWFgc:0zf69DQH1CUowj4X9tm+3le3dl59gz
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

expiro backdoor discovery persistence

Malware Config

Signatures

Expiro, m0yv
Expiro aka m0yv is a multi-functional backdoor written in C++.
backdoor expiro

Expiro payload 11 IoCs

backdoor

resource	yara_rule
behavioral2/memory/2892-5-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/2892-6-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/2892-10-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4824-20-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4824-21-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4824-23-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4824-24-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4824-25-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4824-27-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4824-29-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2
behavioral2/memory/4824-36-0x0000000000400000-0x000000000040B000-memory.dmp	family_expiro2

Executes dropped EXE 2 IoCs

pid	Process
552	service176.exe
4824	service176.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-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service176.exe"	service176.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe Reader Speed Launcher = "C:\\Windows\\SysWOW64\\service176.exe"	service176.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:	service176.exe
File opened (read-only)	\??\F:	service176.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\\service176.exe"	service176.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\service176.exe	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\service176.exe	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4960 set thread context of 2892	4960	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	87
PID 552 set thread context of 4824	552	service176.exe	93

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	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service176.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service176.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4960 wrote to memory of 2892	4960	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	87
PID 4960 wrote to memory of 2892	4960	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	87
PID 4960 wrote to memory of 2892	4960	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	87
PID 4960 wrote to memory of 2892	4960	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	87
PID 4960 wrote to memory of 2892	4960	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	87
PID 4960 wrote to memory of 2892	4960	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	87
PID 4960 wrote to memory of 2892	4960	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	87
PID 2892 wrote to memory of 552	2892	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	88
PID 2892 wrote to memory of 552	2892	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	88
PID 2892 wrote to memory of 552	2892	6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe	88
PID 552 wrote to memory of 4824	552	service176.exe	93
PID 552 wrote to memory of 4824	552	service176.exe	93
PID 552 wrote to memory of 4824	552	service176.exe	93
PID 552 wrote to memory of 4824	552	service176.exe	93
PID 552 wrote to memory of 4824	552	service176.exe	93
PID 552 wrote to memory of 4824	552	service176.exe	93
PID 552 wrote to memory of 4824	552	service176.exe	93

C:\Users\Admin\AppData\Local\Temp\6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Users\Admin\AppData\Local\Temp\6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\6b695dcdca8cd51ecdffc7d68a1e16fd_JaffaCakes118.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2892
- - C:\Windows\SysWOW64\service176.exe
    -n
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:552
  - - C:\Windows\SysWOW64\service176.exe
      -n
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Enumerates connected drives
      Modifies WinLogon
      System Location Discovery: System Language Discovery
      PID:4824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

service176.exe

Path C:\Windows\SysWOW64\service176.exe
Size 104KB
SHA256 526a9e75fe5ccd6768918f4e19f622d1fa6df74d9420710ebdb9fc3eb753d176
MD5 6b695dcdca8cd51ecdffc7d68a1e16fd
SHA1 570d8a37acad639cf2dbbb1e6d51426e219b2821
SHA512 2c53d6c67397e06f05ad8973f31a6adfbc452d9194aafba84ff29dfad23411d343bc06595ffa3ca3aa687143cf29a86f3f19a7e2a03f9ec40e17469fab6923b4
SSDEEP 768:3kWXT7zWf69DQcvi1LcO8UoPIj4X9gqm+3lRf03NDKgj6+58nIWFgc:0zf69DQH1CUowj4X9tm+3le3dl59gz
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/552-17-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2892-5-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/2892-10-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/2892-4-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/2892-6-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/2892-1-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-23-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-19-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-20-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-21-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-24-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-25-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-27-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-29-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4824-36-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4960-3-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/4960-0-0x0000000000400000-0x000000000041F000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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