d0203818d3d8b32bf5a293d29cb4fef1ccfe0502ca8207977dd70430306f2121

Analysis

max time kernel
150s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09/06/2024, 03:20

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General

Target

6fddec5d8fc66bcf441e99b2a3be8830.exe
Size

65KB
MD5

6fddec5d8fc66bcf441e99b2a3be8830
SHA1

a23f13a250c72c7e033accffcad88c5e3bab5ab4
SHA256

d0203818d3d8b32bf5a293d29cb4fef1ccfe0502ca8207977dd70430306f2121
SHA512

f4fe79af6cf7836406f6243338ab0f949cfc8ab551a15adc685dd15fb288ce2a037a7c4daf56b80e19e4acbcfc64d1d4695df391c671a8037e1da52a636387ed
SSDEEP

1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/Ouh:7WNqkOJWmo1HpM0MkTUmuh

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 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\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Modifies Installed Components in the registry 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	explorer.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe

Executes dropped EXE 4 IoCs

pid	Process
3324	explorer.exe
4452	spoolsv.exe
1848	svchost.exe
1780	spoolsv.exe

Adds Run key to start application 2 TTPs 4 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\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	6fddec5d8fc66bcf441e99b2a3be8830.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3840	6fddec5d8fc66bcf441e99b2a3be8830.exe
3840	6fddec5d8fc66bcf441e99b2a3be8830.exe
3324	explorer.exe
3324	explorer.exe
3324	explorer.exe
3324	explorer.exe
3324	explorer.exe
3324	explorer.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe
1848	svchost.exe
1848	svchost.exe
3324	explorer.exe
3324	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3324	explorer.exe
1848	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3840	6fddec5d8fc66bcf441e99b2a3be8830.exe
3840	6fddec5d8fc66bcf441e99b2a3be8830.exe
3324	explorer.exe
3324	explorer.exe
4452	spoolsv.exe
4452	spoolsv.exe
1848	svchost.exe
1848	svchost.exe
1780	spoolsv.exe
1780	spoolsv.exe
3324	explorer.exe
3324	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3840 wrote to memory of 3324	3840	6fddec5d8fc66bcf441e99b2a3be8830.exe	81
PID 3840 wrote to memory of 3324	3840	6fddec5d8fc66bcf441e99b2a3be8830.exe	81
PID 3840 wrote to memory of 3324	3840	6fddec5d8fc66bcf441e99b2a3be8830.exe	81
PID 3324 wrote to memory of 4452	3324	explorer.exe	83
PID 3324 wrote to memory of 4452	3324	explorer.exe	83
PID 3324 wrote to memory of 4452	3324	explorer.exe	83
PID 4452 wrote to memory of 1848	4452	spoolsv.exe	85
PID 4452 wrote to memory of 1848	4452	spoolsv.exe	85
PID 4452 wrote to memory of 1848	4452	spoolsv.exe	85
PID 1848 wrote to memory of 1780	1848	svchost.exe	86
PID 1848 wrote to memory of 1780	1848	svchost.exe	86
PID 1848 wrote to memory of 1780	1848	svchost.exe	86
PID 1848 wrote to memory of 2548	1848	svchost.exe	88
PID 1848 wrote to memory of 2548	1848	svchost.exe	88
PID 1848 wrote to memory of 2548	1848	svchost.exe	88
PID 1848 wrote to memory of 2592	1848	svchost.exe	98
PID 1848 wrote to memory of 2592	1848	svchost.exe	98
PID 1848 wrote to memory of 2592	1848	svchost.exe	98
PID 1848 wrote to memory of 3512	1848	svchost.exe	100
PID 1848 wrote to memory of 3512	1848	svchost.exe	100
PID 1848 wrote to memory of 3512	1848	svchost.exe	100

C:\Users\Admin\AppData\Local\Temp\6fddec5d8fc66bcf441e99b2a3be8830.exe
"C:\Users\Admin\AppData\Local\Temp\6fddec5d8fc66bcf441e99b2a3be8830.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3840
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Modifies Installed Components in the registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3324
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4452
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Modifies Installed Components in the registry
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1848
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:1780
    - - C:\Windows\SysWOW64\at.exe
        
        at 03:22 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2548
    - - C:\Windows\SysWOW64\at.exe
        
        at 03:23 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2592
    - - C:\Windows\SysWOW64\at.exe
        
        at 03:24 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3512

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\mrsys.exe

Filesize
65KB

MD5
940182f4963f0f640f79226beedc83be

SHA1
f1f77c7eb374a4ab9f6c874640ed39e954a88b06

SHA256
2adedfff0d9319d2640505fe3498bb0d0b03a9e96335e436f35c13e72e419a9f

SHA512
71ee3273594f806fba81dfbf8d5ba696b8448114fc334fcd0038586c41e4e6d420fa46d31bbf425caa179cbac25c894277d8f8fcc23657391ec93be0564fa86d

Download Submit
C:\Windows\System\spoolsv.exe

Filesize
65KB

MD5
3c85f2392b21c3eb538d7ddde76c8f57

SHA1
9526a1583f35198de6bb43726c5b59b372bb8207

SHA256
21d82ea0113bd0ee6a12d273b6792bc9fb342ca9b2657e08220a4074e034acaa

SHA512
d7850a891b8634904212b93d1579edf05b51f72d43518564d92ad2fb6a8e342c5e787f015b6b96091f9528e821fd8f312ef792b4808c77847931953af726715e

Download Submit
C:\Windows\System\svchost.exe

Filesize
65KB

MD5
bf776ae15bdd8a2589d9cc160ac078eb

SHA1
f7e0324a5fb0878c5a3dfe23b7841299fada9d25

SHA256
efd558ff1ecfda6b7f71cacfab80c6579492f59ce3a1e353a5fc02bd8fa4cf7d

SHA512
aaca69ad7f030f6b541337280aab4ee5665fe7f925c57eb84491f2998143e50374ad96f1687a402e9747f6b4788df8487c5a1aa38c464867a165a600ef4091eb

Download Submit
\??\c:\windows\system\explorer.exe

Filesize
65KB

MD5
75c539915a382a3dda9016792c1da52f

SHA1
e346e524e9c82b810427b42157f71c5f12de5cb0

SHA256
87c7102d57192a20ada1a4a4a994b09e8d9ebe3906b6177c235e0ee7005bdb67

SHA512
51469da1c4cc1f62965373e8c13469979ea1d422074409c56c096c4d5bdb217b40ce4682475a1803b52e47d61234a132aaf3b25b8b878abfb83f94aceb18e061

Download Submit
memory/1780-45-0x00000000750B0000-0x000000007520D000-memory.dmp

Filesize
1.4MB

Download
memory/1780-54-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1780-46-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1848-63-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1848-39-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1848-37-0x00000000750B0000-0x000000007520D000-memory.dmp

Filesize
1.4MB

Download
memory/3324-18-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3324-61-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3324-72-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3324-12-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3324-14-0x00000000750B0000-0x000000007520D000-memory.dmp

Filesize
1.4MB

Download
memory/3840-44-0x00000000001C0000-0x00000000001C4000-memory.dmp

Filesize
16KB

Download
memory/3840-5-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/3840-1-0x00000000001C0000-0x00000000001C4000-memory.dmp

Filesize
16KB

Download
memory/3840-2-0x00000000750B0000-0x000000007520D000-memory.dmp

Filesize
1.4MB

Download
memory/3840-58-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3840-59-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/3840-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3840-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4452-30-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4452-26-0x00000000750B0000-0x000000007520D000-memory.dmp

Filesize
1.4MB

Download
memory/4452-25-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4452-56-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download