66299b2a4a65cec262355fd31e4910a30b7e21df5b089a9182da45249c23ce9c

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06/09/2024, 10:43

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General

Target

7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
Size

1.4MB
MD5

7f16a724a0c8399c9ce8cd4a0a21eab0
SHA1

1aaf1b9cd83067904c7cb023e6bc353ecff50f69
SHA256

66299b2a4a65cec262355fd31e4910a30b7e21df5b089a9182da45249c23ce9c
SHA512

d19f4409ad864cbaf2b0e1bd13d505243dc7c5504cd5201bc973b56de0be76f45b0368841a944f30b7758e6f597fb0d1dcb7564420396a79fdb1efae278bd038
SSDEEP

24576:S9cdOqX1uuMliQzd4mNy9Sh5hJgpiwVQLJaOSZ4LehoZza9gNWmAO5ehlMV:S9UX1uBx4mYo83vOSeyeaKrT

Score

10^/10

discovery 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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\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"	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
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

Executes dropped EXE 4 IoCs

pid	Process
2708	explorer.exe
2896	spoolsv.exe
2548	svchost.exe
3004	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
2708	explorer.exe
2708	explorer.exe
2896	spoolsv.exe
2896	spoolsv.exe
2548	svchost.exe
2548	svchost.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

Suspicious use of NtSetInformationThreadHideFromDebugger 29 IoCs

pid	Process
3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
2708	explorer.exe
2896	spoolsv.exe
2548	svchost.exe
3004	spoolsv.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\explorer.exe	7f16a724a0c8399c9ce8cd4a0a21eab0N.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	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	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
2708	explorer.exe
2708	explorer.exe
2708	explorer.exe
2708	explorer.exe
2548	svchost.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe
2548	svchost.exe
2708	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2708	explorer.exe
2548	svchost.exe

Suspicious use of SetWindowsHookEx 17 IoCs

pid	Process
3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
2708	explorer.exe
2708	explorer.exe
2708	explorer.exe
2896	spoolsv.exe
2896	spoolsv.exe
2896	spoolsv.exe
2548	svchost.exe
2548	svchost.exe
2548	svchost.exe
3004	spoolsv.exe
3004	spoolsv.exe
3004	spoolsv.exe
2708	explorer.exe
2708	explorer.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 2708	3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe	30
PID 3064 wrote to memory of 2708	3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe	30
PID 3064 wrote to memory of 2708	3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe	30
PID 3064 wrote to memory of 2708	3064	7f16a724a0c8399c9ce8cd4a0a21eab0N.exe	30
PID 2708 wrote to memory of 2896	2708	explorer.exe	31
PID 2708 wrote to memory of 2896	2708	explorer.exe	31
PID 2708 wrote to memory of 2896	2708	explorer.exe	31
PID 2708 wrote to memory of 2896	2708	explorer.exe	31
PID 2896 wrote to memory of 2548	2896	spoolsv.exe	32
PID 2896 wrote to memory of 2548	2896	spoolsv.exe	32
PID 2896 wrote to memory of 2548	2896	spoolsv.exe	32
PID 2896 wrote to memory of 2548	2896	spoolsv.exe	32
PID 2548 wrote to memory of 3004	2548	svchost.exe	33
PID 2548 wrote to memory of 3004	2548	svchost.exe	33
PID 2548 wrote to memory of 3004	2548	svchost.exe	33
PID 2548 wrote to memory of 3004	2548	svchost.exe	33
PID 2548 wrote to memory of 1200	2548	svchost.exe	34
PID 2548 wrote to memory of 1200	2548	svchost.exe	34
PID 2548 wrote to memory of 1200	2548	svchost.exe	34
PID 2548 wrote to memory of 1200	2548	svchost.exe	34
PID 2548 wrote to memory of 592	2548	svchost.exe	36
PID 2548 wrote to memory of 592	2548	svchost.exe	36
PID 2548 wrote to memory of 592	2548	svchost.exe	36
PID 2548 wrote to memory of 592	2548	svchost.exe	36

C:\Users\Admin\AppData\Local\Temp\7f16a724a0c8399c9ce8cd4a0a21eab0N.exe
"C:\Users\Admin\AppData\Local\Temp\7f16a724a0c8399c9ce8cd4a0a21eab0N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3064
- \??\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
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - 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:2708
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2896
  - - \??\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
      Suspicious use of NtSetInformationThreadHideFromDebugger
      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:2548
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of NtSetInformationThreadHideFromDebugger
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:3004
    - - C:\Windows\SysWOW64\at.exe
        
        at 10:45 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1200
    - - C:\Windows\SysWOW64\at.exe
        
        at 10:46 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:592

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

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Downloads

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

Filesize
1.4MB

MD5
fcc0b636c95c7ad434716cc3dbc1bd19

SHA1
f316164c2c9154eb0b75f902bc51404deeb21655

SHA256
0316a66d2d37d7c761a369f95f256fc961e28948628a8af115de015a5e11f408

SHA512
8dccee4cb0a3067d4849e19a780aa548607f8e4b34f43d970948e2340a171b9a52151f4944a54fb4592ab5adbadcbc367dc4d6d1eace3b02ebb65416fa05731b

Download Submit
\Windows\system\explorer.exe

Filesize
1.4MB

MD5
773551fbda813f404277fe92579b8358

SHA1
cc79ba1927b8e71b84f4fb24a21aac5dbcd5dd38

SHA256
358bbefd03302a3baa0ff4d6f085756302fba32e48164fdd60b8f290ea26273d

SHA512
3a96d66effba5a8729fb5936eb16cabae18c91e1f64b14db60eeb6f393db17ad758b1808909b5c37888e8732ee7428e66550c7164ef1c010036be6748e21d032

Download Submit
\Windows\system\spoolsv.exe

Filesize
1.4MB

MD5
a1af72fdb91ed93bf1503ac814f841a7

SHA1
9ec1db4517083c107ca6fdc2d9e98fa2b74bb98b

SHA256
bf20df4e539e8609910e6d25b41002a0b262cf0521501c9be4bf297e06826add

SHA512
8f7bc195f715bee44c9822e63f00d4aa62e27899e28c27495d773a1c76e9d5bc844a837069a1cb4cb24e74f4ec0c4c7862193a549089465a39fd8ba006973143

Download Submit
\Windows\system\svchost.exe

Filesize
1.4MB

MD5
b31651bb70d13f8003fa981f215fc868

SHA1
630f1326205ef78357bc16df8fc40a4540ce39f1

SHA256
3e8216f9eb81d63216a5c8a77907df239108d70d471f20ee3fa7f1d8489aa61a

SHA512
3649767da12f420a793dc0f3f128a424f216d97d7366711922d8ad0603ff53a1e472f253e8f927c27c1376fd5856a3d1e843117b2110035a66b056b0609dd0f0

Download Submit
memory/2548-76-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/2548-71-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/2548-54-0x0000000004240000-0x00000000047E0000-memory.dmp

Filesize
5.6MB

Download
memory/2548-46-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/2708-29-0x00000000043D0000-0x0000000004970000-memory.dmp

Filesize
5.6MB

Download
memory/2708-69-0x00000000043D0000-0x0000000004970000-memory.dmp

Filesize
5.6MB

Download
memory/2708-31-0x00000000043D0000-0x0000000004970000-memory.dmp

Filesize
5.6MB

Download
memory/2708-83-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/2708-75-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/2708-15-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/2708-68-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/2896-44-0x0000000004750000-0x0000000004CF0000-memory.dmp

Filesize
5.6MB

Download
memory/2896-30-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/2896-65-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/3004-56-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/3004-61-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/3064-55-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/3064-12-0x0000000004590000-0x0000000004B30000-memory.dmp

Filesize
5.6MB

Download
memory/3064-66-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download
memory/3064-14-0x0000000004590000-0x0000000004B30000-memory.dmp

Filesize
5.6MB

Download
memory/3064-0-0x0000000000400000-0x00000000009A0000-memory.dmp

Filesize
5.6MB

Download