20da107131fe29bfe7f610ff65d463c5f09c1f868982892f21b1bf800cf843b0

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
14-08-2024 11:59

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

916df5e9c463468ed689c6ed96c7c0f0N.exe
Size

71KB
MD5

916df5e9c463468ed689c6ed96c7c0f0
SHA1

971a0aad4d6393196d4534e879fa60e6b46e847c
SHA256

20da107131fe29bfe7f610ff65d463c5f09c1f868982892f21b1bf800cf843b0
SHA512

6b2757760a4aa5fe3adeb6aa8b94e3c737bbd7a1526860c998c3dd477a2917c4a80934202963dcf444562b708039a658985d8cb22a8a19977cc78e4a27cdbb13
SSDEEP

768:EXKeT2Si83nLt8tkGX8uxOHgRrW5YLKG9Y/HrSNm0kmG7xMsVAnc3yy85SBiLFMb:EFrmh0HgB3LKrL9AcnQFMc9zwR6i+BW

Score

10^/10

discovery evasion persistence upx

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-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

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
2596	explorer.exe
2724	spoolsv.exe
2620	svchost.exe
2144	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2824	916df5e9c463468ed689c6ed96c7c0f0N.exe
2824	916df5e9c463468ed689c6ed96c7c0f0N.exe
2596	explorer.exe
2596	explorer.exe
2724	spoolsv.exe
2724	spoolsv.exe
2620	svchost.exe
2620	svchost.exe

UPX packed file 14 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2824-0-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/files/0x0009000000016cb7-6.dat	upx
behavioral1/files/0x0009000000016d20-21.dat	upx
behavioral1/memory/2724-30-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/files/0x0008000000016d3a-41.dat	upx
behavioral1/memory/2620-42-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2144-52-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2144-55-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2724-59-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2824-61-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/files/0x0009000000016d31-62.dat	upx
behavioral1/memory/2596-63-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2620-64-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral1/memory/2596-74-0x0000000000400000-0x0000000000435000-memory.dmp	upx

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\explorer.exe	916df5e9c463468ed689c6ed96c7c0f0N.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
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 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	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	916df5e9c463468ed689c6ed96c7c0f0N.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2824	916df5e9c463468ed689c6ed96c7c0f0N.exe
2596	explorer.exe
2596	explorer.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2620	svchost.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2620	svchost.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2620	svchost.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2620	svchost.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2620	svchost.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe
2620	svchost.exe
2620	svchost.exe
2596	explorer.exe
2596	explorer.exe
2620	svchost.exe
2596	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2596	explorer.exe
2620	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2824	916df5e9c463468ed689c6ed96c7c0f0N.exe
2824	916df5e9c463468ed689c6ed96c7c0f0N.exe
2596	explorer.exe
2596	explorer.exe
2724	spoolsv.exe
2724	spoolsv.exe
2620	svchost.exe
2620	svchost.exe
2144	spoolsv.exe
2144	spoolsv.exe
2596	explorer.exe
2596	explorer.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2824 wrote to memory of 2596	2824	916df5e9c463468ed689c6ed96c7c0f0N.exe	30
PID 2824 wrote to memory of 2596	2824	916df5e9c463468ed689c6ed96c7c0f0N.exe	30
PID 2824 wrote to memory of 2596	2824	916df5e9c463468ed689c6ed96c7c0f0N.exe	30
PID 2824 wrote to memory of 2596	2824	916df5e9c463468ed689c6ed96c7c0f0N.exe	30
PID 2596 wrote to memory of 2724	2596	explorer.exe	31
PID 2596 wrote to memory of 2724	2596	explorer.exe	31
PID 2596 wrote to memory of 2724	2596	explorer.exe	31
PID 2596 wrote to memory of 2724	2596	explorer.exe	31
PID 2724 wrote to memory of 2620	2724	spoolsv.exe	32
PID 2724 wrote to memory of 2620	2724	spoolsv.exe	32
PID 2724 wrote to memory of 2620	2724	spoolsv.exe	32
PID 2724 wrote to memory of 2620	2724	spoolsv.exe	32
PID 2620 wrote to memory of 2144	2620	svchost.exe	33
PID 2620 wrote to memory of 2144	2620	svchost.exe	33
PID 2620 wrote to memory of 2144	2620	svchost.exe	33
PID 2620 wrote to memory of 2144	2620	svchost.exe	33
PID 2620 wrote to memory of 1036	2620	svchost.exe	34
PID 2620 wrote to memory of 1036	2620	svchost.exe	34
PID 2620 wrote to memory of 1036	2620	svchost.exe	34
PID 2620 wrote to memory of 1036	2620	svchost.exe	34
PID 2620 wrote to memory of 2024	2620	svchost.exe	37
PID 2620 wrote to memory of 2024	2620	svchost.exe	37
PID 2620 wrote to memory of 2024	2620	svchost.exe	37
PID 2620 wrote to memory of 2024	2620	svchost.exe	37

C:\Users\Admin\AppData\Local\Temp\916df5e9c463468ed689c6ed96c7c0f0N.exe
"C:\Users\Admin\AppData\Local\Temp\916df5e9c463468ed689c6ed96c7c0f0N.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2824
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2596
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2724
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2620
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2144
    - - C:\Windows\SysWOW64\at.exe
        
        at 12:01 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1036
    - - C:\Windows\SysWOW64\at.exe
        
        at 12:02 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2024

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
71KB

MD5
64da393432ac3abfb577a6d2fcfd161d

SHA1
cafd1220318c53ba6437c2f3f4dcb1d28887c0e3

SHA256
0db4d0a88caa9f47c980e9ed22fbba804947e89ec54de0f656b24e132afb7e31

SHA512
fa19a43ef478acb8804ab1906db229922be7931d97ea5354fbf183b5616b03687f5b46ba061cd17c71734ede0c781640713eb41119e82edbaf9bc52f75c8887a

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

Filesize
71KB

MD5
419b0fc5d46efd8e09f8b1328f568a6a

SHA1
8fdfda85bd77fceda7df18bdbfc5d6e5a6373915

SHA256
3a7eed0c235c81b05dc940cc15eccf4d5631dd0fab01814216e0632cdb781f59

SHA512
fc5dad72f3da511d8e5c68e4bf14846a85f15ec16ca1f5436ab4b6ab5e65fa7c88ccc46cc2b28f562dc94585cf809d56984ef5bdfd975ce97393cf133afb1417

Download Submit
\Windows\system\explorer.exe

Filesize
71KB

MD5
af626fd1e06077d01403b9b872181ff1

SHA1
381eb52c00f245bfd28ff59bc3aed17dd6c5dcdd

SHA256
0bfbc88c659edcc7e634f22392ca2f9e3de8585969f8ae0368f0ed30f7d8a1d4

SHA512
60763aa5b57590ac83e9e77317daf25dd2e6f902ab80d77429fda6dd6814e2d9133ab60072846eee15498b6e33ff1b9381fba3699308f30b428b30f554cbbf5b

Download Submit
\Windows\system\spoolsv.exe

Filesize
71KB

MD5
0f4eff15445ca2b84286f4675082b8b0

SHA1
9ec45ab1a0a877aa6ee53e222865e261a6cc0013

SHA256
230425fd3702d3e280ece3621f009485ba2762c06e7c9c2e9f7733b440144865

SHA512
8bd52a23f1993c519d64cb84211ba63c29f53a13db7a365e2abd92c3d1f7899107e329d02d208a76a4391a545aad12583e095b0afda1eaa6c23fd344efcdde5a

Download Submit
memory/2144-52-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2144-55-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2596-74-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2596-63-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2620-42-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2620-64-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2620-67-0x0000000002570000-0x00000000025A5000-memory.dmp

Filesize
212KB

Download
memory/2724-59-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2724-30-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-0-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-61-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2824-14-0x0000000002730000-0x0000000002765000-memory.dmp

Filesize
212KB

Download
memory/2824-13-0x0000000002730000-0x0000000002765000-memory.dmp

Filesize
212KB

Download