b4c09f38796cec7b6e790b8956f585109065e9b70f972b50e3263c5f1af06145

Analysis

max time kernel
186s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
01/01/2024, 16:13

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General

Target

3d4e1b27dccfe21fa8c30114c5f5cfd0.exe
Size

1.2MB
MD5

3d4e1b27dccfe21fa8c30114c5f5cfd0
SHA1

abbde50823ab86fc33e857e3f6f4d108d427543a
SHA256

b4c09f38796cec7b6e790b8956f585109065e9b70f972b50e3263c5f1af06145
SHA512

05653fd983eeec5f78521d405809f88f97fa46967e6562a5967c58617e327ba3103e86831935437ecf91443d71735eb143c8db7c756f71eb2e85bbf0f3c15ec3
SSDEEP

24576:GIxx4RfxnUcoCdqr0Lk7OmII9JH6Qm0+eihOEKYjRiZ2TJlsd:wUA0ND6JeiOE7jUZYQd

Score

8^/10

persistence

Malware Config

Signatures

Uses Session Manager for persistence 2 TTPs 3 IoCs

Creates Session Manager registry key to run executable early in system boot.

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SYSTEM\ControlSet002\Control\Session manager\BootExecute = 6100750074006f0063006800650063006b0020006100750074006f00630068006b0020002a0000000000	reg.exe
Set value (data)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Session Manager\BootExecute = 6100750074006f0063006800650063006b0020006100750074006f00630068006b0020002a0000000000	reg.exe
Set value (data)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Session Manager\BootExecute = 6100750074006f0063006800650063006b0020006100750074006f00630068006b0020002a0000000000	reg.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Windows\\system\\service.exe"	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\reg_k1.txt	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system\service.exe	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe
File opened for modification	C:\Windows\system\service.exe	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3732 wrote to memory of 4120	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	93
PID 3732 wrote to memory of 4120	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	93
PID 3732 wrote to memory of 4120	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	93
PID 3732 wrote to memory of 3968	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	95
PID 3732 wrote to memory of 3968	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	95
PID 3732 wrote to memory of 3968	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	95
PID 3732 wrote to memory of 4760	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	94
PID 3732 wrote to memory of 4760	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	94
PID 3732 wrote to memory of 4760	3732	3d4e1b27dccfe21fa8c30114c5f5cfd0.exe	94

C:\Users\Admin\AppData\Local\Temp\3d4e1b27dccfe21fa8c30114c5f5cfd0.exe
"C:\Users\Admin\AppData\Local\Temp\3d4e1b27dccfe21fa8c30114c5f5cfd0.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3732
- C:\Windows\SysWOW64\reg.exe
  reg add "HKLM\SYSTEM\ControlSet001\Control\Session manager" /v BootExecute /t REG_MULTI_SZ /d "autocheck autochk *" /f
  2⤵
  - Uses Session Manager for persistence
  PID:4120
- C:\Windows\SysWOW64\reg.exe
  reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session manager" /v BootExecute /t REG_MULTI_SZ /d "autocheck autochk *" /f
  2⤵
  - Uses Session Manager for persistence
  PID:4760
- C:\Windows\SysWOW64\reg.exe
  reg add "HKLM\SYSTEM\ControlSet002\Control\Session manager" /v BootExecute /t REG_MULTI_SZ /d "autocheck autochk *" /f
  2⤵
  - Uses Session Manager for persistence
  PID:3968

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3732-0-0x0000000002D50000-0x0000000002D51000-memory.dmp

Filesize
4KB

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memory/3732-1-0x0000000002D50000-0x0000000002D51000-memory.dmp

Filesize
4KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads