35916e8b40ec27b8f3a931566a94f5a464dc9e5783c7fca1bdd194e7193bf0d7

Analysis

max time kernel
120s
max time network
125s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:17

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General

Target

d690267038d2a718d56558e839b2613a.exe
Size

347KB
MD5

d690267038d2a718d56558e839b2613a
SHA1

24eb35483762da9cd99f113bc2252516a1806b76
SHA256

15b9622370397ba0679cdefe1a1eb00883c58a588f0d08cf825e89447bbb4b25
SHA512

aa2861ae8f02dea35b66f9f11c17ad5231fb5b20ac039dd3c4814abb7b5af7093eda4449c2ec9a34f1dccf658b2a359c591295af0901d0dbfaaa77b791347714
SSDEEP

6144:CCwHsJ+q0CwC40mb8411g49pPdMFMhITJfjjBMz8mvtUPHjEG0EILMTWhDQas9gA:QIx74VMFLT9RMz8AijEG0tLzhDQr9gTU

Score

8^/10

discovery persistence

Malware Config

Signatures

Adds policy 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\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsUptade = "C:\\Program Files (x86)\\WindowsUptade\\winuptade.exe.exe"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsUptade = "C:\\Program Files (x86)\\WindowsUptade\\winuptade.exe.exe"	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	iexplore.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 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\{2QC7VJIW-12CR-3VO0-0HYY-F3I775DYWLEN}\StubPath = "C:\\Program Files (x86)\\WindowsUptade\\winuptade.exe.exe Restart"	iexplore.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Active Setup\Installed Components\{2QC7VJIW-12CR-3VO0-0HYY-F3I775DYWLEN}	iexplore.exe

Executes dropped EXE 1 IoCs

pid	Process
1668	BronxCrypt.exe

Adds Run key to start application 2 TTPs 2 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\WindowsUptade = "C:\\Program Files (x86)\\WindowsUptade\\winuptade.exe.exe"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUptade = "C:\\Program Files (x86)\\WindowsUptade\\winuptade.exe.exe"	iexplore.exe

Drops file in Program Files directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\WindowsUptade\winuptade.exe.exe	iexplore.exe
File opened for modification	C:\Program Files (x86)\WindowsUptade\plugin.dat	iexplore.exe
File opened for modification	C:\Program Files (x86)\WindowsUptade\	iexplore.exe
File created	C:\Program Files (x86)\WindowsUptade\logs.dat	iexplore.exe
File opened for modification	C:\Program Files (x86)\WindowsUptade\logs.dat	iexplore.exe
File created	C:\Program Files (x86)\WindowsUptade\winuptade.exe.exe	iexplore.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 2 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	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BronxCrypt.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1668	BronxCrypt.exe
1668	BronxCrypt.exe
1668	BronxCrypt.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1668	BronxCrypt.exe
Token: SeDebugPrivilege	1668	BronxCrypt.exe
Token: SeDebugPrivilege	1668	BronxCrypt.exe
Token: SeDebugPrivilege	1668	BronxCrypt.exe
Token: SeDebugPrivilege	2752	iexplore.exe
Token: SeDebugPrivilege	2752	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 1668	2060	d690267038d2a718d56558e839b2613a.exe	28
PID 2060 wrote to memory of 1668	2060	d690267038d2a718d56558e839b2613a.exe	28
PID 2060 wrote to memory of 1668	2060	d690267038d2a718d56558e839b2613a.exe	28
PID 2060 wrote to memory of 1668	2060	d690267038d2a718d56558e839b2613a.exe	28
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29
PID 1668 wrote to memory of 2752	1668	BronxCrypt.exe	29

C:\Windows\System32\smss.exe
\SystemRoot\System32\smss.exe
1⤵
PID:256

C:\Windows\system32\csrss.exe
%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=16
1⤵
PID:336

C:\Windows\system32\wininit.exe
wininit.exe
1⤵
PID:384
- C:\Windows\system32\services.exe
  C:\Windows\system32\services.exe
  2⤵
  PID:480
- - C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k DcomLaunch
    3⤵
    PID:612
  - - C:\Windows\system32\DllHost.exe
      C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
      4⤵
      PID:1692
- - C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k RPCSS
    3⤵
    PID:692
- - C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
    3⤵
    PID:776
- - C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
    3⤵
    PID:832
  - - C:\Windows\system32\Dwm.exe
      "C:\Windows\system32\Dwm.exe"
      4⤵
      PID:1180
- - C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs
    3⤵
    PID:872
- - C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalService
    3⤵
    PID:980
- - C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k NetworkService
    3⤵
    PID:268
- - C:\Windows\System32\spoolsv.exe
    C:\Windows\System32\spoolsv.exe
    3⤵
    PID:344
- - C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
    3⤵
    PID:1060
- - C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    3⤵
    PID:1120
- - C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
    3⤵
    PID:2116
- - C:\Windows\system32\sppsvc.exe
    C:\Windows\system32\sppsvc.exe
    3⤵
    PID:544
- C:\Windows\system32\lsass.exe
  C:\Windows\system32\lsass.exe
  2⤵
  PID:488
- C:\Windows\system32\lsm.exe
  C:\Windows\system32\lsm.exe
  2⤵
  PID:496

C:\Windows\system32\csrss.exe
%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=16
1⤵
PID:392

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:432

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1212
- C:\Users\Admin\AppData\Local\Temp\d690267038d2a718d56558e839b2613a.exe
  "C:\Users\Admin\AppData\Local\Temp\d690267038d2a718d56558e839b2613a.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2060
- - C:\Users\Admin\AppData\Local\Temp\BronxCrypt.exe
    "C:\Users\Admin\AppData\Local\Temp\BronxCrypt.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1668
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      4⤵
      Adds policy Run key to start application
      Boot or Logon Autostart Execution: Active Setup
      Adds Run key to start application
      Drops file in Program Files directory
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:2752

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

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\Temp\BronxCrypt.exe

Filesize
233KB

MD5
d6b8056df27e8a8057ff4e8d2b4e3810

SHA1
1767a13ec95193043d7ffe9626e46f3cc7941425

SHA256
59f894e6f232e0a3c0f28531e3de35e079fe48c6fce2b7201611e15772d63ac1

SHA512
ddc8290971070b1d044d0e5c2c3bf72ef57fc368828055168514591cca2815c6eef50f365fee35377b4b1bf1980d5235d872a183e2722ec1acbe318688ada89a

Download Submit
memory/256-38-0x0000000000110000-0x0000000000111000-memory.dmp

Filesize
4KB

Download
memory/1668-12-0x0000000010410000-0x0000000010441000-memory.dmp

Filesize
196KB

Download
memory/1668-21-0x00000000005E0000-0x00000000005EA000-memory.dmp

Filesize
40KB

Download
memory/1668-14-0x0000000010410000-0x0000000010441000-memory.dmp

Filesize
196KB

Download
memory/1668-30-0x00000000005F0000-0x00000000005FA000-memory.dmp

Filesize
40KB

Download
memory/1668-37-0x0000000010450000-0x000000001045A000-memory.dmp

Filesize
40KB

Download
memory/2060-0-0x000007FEF553E000-0x000007FEF553F000-memory.dmp

Filesize
4KB

Download
memory/2060-1-0x000007FEF5280000-0x000007FEF5C1D000-memory.dmp

Filesize
9.6MB

Download
memory/2060-2-0x000007FEF5280000-0x000007FEF5C1D000-memory.dmp

Filesize
9.6MB

Download
memory/2060-3-0x000007FEF5280000-0x000007FEF5C1D000-memory.dmp

Filesize
9.6MB

Download
memory/2060-11-0x000007FEF5280000-0x000007FEF5C1D000-memory.dmp

Filesize
9.6MB

Download