1c00cf1fb536c2b3a76fac398817484607311f827e2254349e04b694de66ff55

Analysis

max time kernel
120s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07/09/2024, 15:49

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General

Target

5080efb71ab520f789a41c45870be9c0N.exe
Size

211KB
MD5

5080efb71ab520f789a41c45870be9c0
SHA1

776bbe2d86f6269719b1158c673734021fc86e68
SHA256

1c00cf1fb536c2b3a76fac398817484607311f827e2254349e04b694de66ff55
SHA512

a16b9d76eb5ab3f86e86be5c489a1077e9107e87de0d1091ddcc231a19029c88b2d4bd7d5128176410f5ec61374ee1aae6612c6e7a8ab888d0aa65234eaa89d2
SSDEEP

3072:JD6Xtx68yygRBE52mxkEOHLRMpZ4deth8PEAjAfIbAYGPhz6sPJBInxZqOb:Jh8cBzHLRMpZ4d1Zb

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\\userinit.exe"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\userinit.exe"	swchost.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-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	userinit.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	swchost.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
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	userinit.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	swchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	swchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	swchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	swchost.exe

Executes dropped EXE 4 IoCs

pid	Process
3348	userinit.exe
5076	spoolsw.exe
3408	swchost.exe
4384	spoolsw.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\userinit = "c:\\windows\\userinit.exe RO"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Swchost = "c:\\windows\\swchost.exe RO"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\userinit = "c:\\windows\\userinit.exe RO"	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Swchost = "c:\\windows\\swchost.exe RO"	swchost.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\system\udsys.exe	userinit.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\swchost.exe	swchost.exe
File opened for modification	\??\c:\windows\userinit.exe	5080efb71ab520f789a41c45870be9c0N.exe
File opened for modification	\??\c:\windows\spoolsw.exe	userinit.exe
File opened for modification	\??\c:\windows\swchost.exe	spoolsw.exe
File opened for modification	\??\c:\windows\userinit.exe	userinit.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 5 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	5080efb71ab520f789a41c45870be9c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	userinit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	swchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsw.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4844	5080efb71ab520f789a41c45870be9c0N.exe
4844	5080efb71ab520f789a41c45870be9c0N.exe
3348	userinit.exe
3348	userinit.exe
3348	userinit.exe
3348	userinit.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe
3348	userinit.exe
3348	userinit.exe
3408	swchost.exe
3408	swchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3348	userinit.exe
3408	swchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4844	5080efb71ab520f789a41c45870be9c0N.exe
4844	5080efb71ab520f789a41c45870be9c0N.exe
3348	userinit.exe
3348	userinit.exe
5076	spoolsw.exe
5076	spoolsw.exe
3408	swchost.exe
3408	swchost.exe
4384	spoolsw.exe
4384	spoolsw.exe
3348	userinit.exe
3348	userinit.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 3348	4844	5080efb71ab520f789a41c45870be9c0N.exe	93
PID 4844 wrote to memory of 3348	4844	5080efb71ab520f789a41c45870be9c0N.exe	93
PID 4844 wrote to memory of 3348	4844	5080efb71ab520f789a41c45870be9c0N.exe	93
PID 3348 wrote to memory of 5076	3348	userinit.exe	94
PID 3348 wrote to memory of 5076	3348	userinit.exe	94
PID 3348 wrote to memory of 5076	3348	userinit.exe	94
PID 5076 wrote to memory of 3408	5076	spoolsw.exe	95
PID 5076 wrote to memory of 3408	5076	spoolsw.exe	95
PID 5076 wrote to memory of 3408	5076	spoolsw.exe	95
PID 3408 wrote to memory of 4384	3408	swchost.exe	97
PID 3408 wrote to memory of 4384	3408	swchost.exe	97
PID 3408 wrote to memory of 4384	3408	swchost.exe	97

C:\Users\Admin\AppData\Local\Temp\5080efb71ab520f789a41c45870be9c0N.exe
"C:\Users\Admin\AppData\Local\Temp\5080efb71ab520f789a41c45870be9c0N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4844
- \??\c:\windows\userinit.exe
  c:\windows\userinit.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - 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:3348
- - \??\c:\windows\spoolsw.exe
    c:\windows\spoolsw.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5076
  - - \??\c:\windows\swchost.exe
      c:\windows\swchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      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:3408
    - - \??\c:\windows\spoolsw.exe
        
        c:\windows\spoolsw.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:4384

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4048,i,10597648459838880772,16562651767759956329,262144 --variations-seed-version --mojo-platform-channel-handle=4460 /prefetch:8
1⤵
PID:1868

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\Local\mrsys.exe

Filesize
211KB

MD5
f81c15969c77cc4162cc4f95d10e316a

SHA1
c735a5eef6def7cc9dbb849f7fc4060383519119

SHA256
3a203f1e29e4f2c3e6a1e93db3771ea5d9caa54f2212c0b6c8d9c147bd4e22f1

SHA512
02001519fd6972a2ef33e48c65a54e43ef624afc043b125d01a64e71a7062f4bfe1e06d123a7b930042665214f5f66849bd4767d3db47bcd6349270ad87323c4

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C:\Windows\spoolsw.exe

Filesize
211KB

MD5
f7ad7c4d61b5bfb71811f349b0fdc786

SHA1
6b88b1094f735de965db7937c24ca8aef6edeca4

SHA256
b53ec783280ced37b74b13a7fca54527c1f92f0914f81c6bf48ef44a306b34ec

SHA512
246471036c39db7f52e08bef737b4ae147a42d0106a44b225f14da7afd64d2a395d9f291b7661183e45cad8cd46e2e19cc2765f4151ea3e8a39be5bd7bd4b010

Download Submit
C:\Windows\swchost.exe

Filesize
211KB

MD5
285e2619d1268193dbd438b3b05b3361

SHA1
9af9226e1933a795923254e60382aba2d0925b26

SHA256
bb50bc8916788d0f304a3e76ceccfbe33c46515416ce4af536d39e6419ec1389

SHA512
a6d1cd845ff8f2bbcd69953948227d388e38348990b3d4db91efc774dde8756350a7eb53372b5f30936fa877a384be1b2e98dd5d4b7e480df22283819052e9bc

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C:\Windows\userinit.exe

Filesize
211KB

MD5
eb8d72813b01bc7e50043f1859f86d38

SHA1
d0f67fbc79a956f2c4c152c9c48dcf738e25310e

SHA256
470a14ea18183e4632cb7497d5cd85a7aa813f4e0f5427af883835ad49e6d03e

SHA512
46ce9c47ec439158dc0d2f1378d933a085cd4f3ba162376cd5094a1a1150b897a6f363d6bfdcbc944193da0a4a7a2c9a2317d80d2536ab9b96ad387405ba888b

Download Submit