d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
06/11/2022, 22:54

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General

Target

Trojan-Ransom.Win32.Blocker.exe
Size

280KB
MD5

7ce7a3098963cd46086eef5d82d39d71
SHA1

b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5
SHA256

d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07
SHA512

a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a
SSDEEP

3072:WnYOsefAsRp0QvPm35OEJ0h0kUlznGOLNLki8+fYFHyF+mhetgTifPjHed/v:k0QG3PbkUlzvpAi5EyFLheiIgv

Score

10^/10

bootkit evasion persistence

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 4 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	nexium3454.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	nexium3454.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	nexium3454.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\nexium3454.exe = "C:\\Users\\Admin\\AppData\\Roaming\\nexium3454.exe:*:Enabled:nexohgdsd"	nexium3454.exe

Executes dropped EXE 3 IoCs

pid	Process
1224	nexium3454.exe
1092	nexium3454.exe
384	nexium3454.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	Trojan-Ransom.Win32.Blocker.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run	Trojan-Ransom.Win32.Blocker.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nexisumdgf = "C:\\Users\\Admin\\AppData\\Roaming\\nexium3454.exe"	Trojan-Ransom.Win32.Blocker.exe

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Taskman = "C:\\Users\\Admin\\AppData\\Roaming\\nexium3454.exe"	Trojan-Ransom.Win32.Blocker.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	Trojan-Ransom.Win32.Blocker.exe
File opened for modification	\??\PhysicalDrive0	nexium3454.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 920 set thread context of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 1624 set thread context of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 1224 set thread context of 1092	1224	nexium3454.exe	84
PID 1092 set thread context of 384	1092	nexium3454.exe	85

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Trojan-Ransom.Win32.Blocker.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
920	Trojan-Ransom.Win32.Blocker.exe
1624	Trojan-Ransom.Win32.Blocker.exe
1224	nexium3454.exe
1092	nexium3454.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 920 wrote to memory of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 920 wrote to memory of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 920 wrote to memory of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 920 wrote to memory of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 920 wrote to memory of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 920 wrote to memory of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 920 wrote to memory of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 920 wrote to memory of 1624	920	Trojan-Ransom.Win32.Blocker.exe	81
PID 1624 wrote to memory of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 1624 wrote to memory of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 1624 wrote to memory of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 1624 wrote to memory of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 1624 wrote to memory of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 1624 wrote to memory of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 1624 wrote to memory of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 1624 wrote to memory of 3948	1624	Trojan-Ransom.Win32.Blocker.exe	82
PID 3948 wrote to memory of 1224	3948	Trojan-Ransom.Win32.Blocker.exe	83
PID 3948 wrote to memory of 1224	3948	Trojan-Ransom.Win32.Blocker.exe	83
PID 3948 wrote to memory of 1224	3948	Trojan-Ransom.Win32.Blocker.exe	83
PID 1224 wrote to memory of 1092	1224	nexium3454.exe	84
PID 1224 wrote to memory of 1092	1224	nexium3454.exe	84
PID 1224 wrote to memory of 1092	1224	nexium3454.exe	84
PID 1224 wrote to memory of 1092	1224	nexium3454.exe	84
PID 1224 wrote to memory of 1092	1224	nexium3454.exe	84
PID 1224 wrote to memory of 1092	1224	nexium3454.exe	84
PID 1224 wrote to memory of 1092	1224	nexium3454.exe	84
PID 1224 wrote to memory of 1092	1224	nexium3454.exe	84
PID 1092 wrote to memory of 384	1092	nexium3454.exe	85
PID 1092 wrote to memory of 384	1092	nexium3454.exe	85
PID 1092 wrote to memory of 384	1092	nexium3454.exe	85
PID 1092 wrote to memory of 384	1092	nexium3454.exe	85
PID 1092 wrote to memory of 384	1092	nexium3454.exe	85
PID 1092 wrote to memory of 384	1092	nexium3454.exe	85
PID 1092 wrote to memory of 384	1092	nexium3454.exe	85
PID 1092 wrote to memory of 384	1092	nexium3454.exe	85

C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
"C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:920
- C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
  "C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1624
- - C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
    "C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
    3⤵
    - Checks computer location settings
    - Adds Run key to start application
    - Modifies WinLogon
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:3948
  - - C:\Users\Admin\AppData\Roaming\nexium3454.exe
      "C:\Users\Admin\AppData\Roaming\nexium3454.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1224
    - - C:\Users\Admin\AppData\Roaming\nexium3454.exe
        
        "C:\Users\Admin\AppData\Roaming\nexium3454.exe"
        5⤵
        Executes dropped EXE
        Writes to the Master Boot Record (MBR)
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1092
      - C:\Users\Admin\AppData\Roaming\nexium3454.exe
        
        "C:\Users\Admin\AppData\Roaming\nexium3454.exe"
        6⤵
        Modifies firewall policy service
        Executes dropped EXE
        
        PID:384

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\nexium3454.exe

Filesize
280KB

MD5
7ce7a3098963cd46086eef5d82d39d71

SHA1
b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5

SHA256
d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07

SHA512
a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a

Download Submit
C:\Users\Admin\AppData\Roaming\nexium3454.exe

Filesize
280KB

MD5
7ce7a3098963cd46086eef5d82d39d71

SHA1
b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5

SHA256
d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07

SHA512
a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a

Download Submit
C:\Users\Admin\AppData\Roaming\nexium3454.exe

Filesize
280KB

MD5
7ce7a3098963cd46086eef5d82d39d71

SHA1
b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5

SHA256
d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07

SHA512
a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a

Download Submit
C:\Users\Admin\AppData\Roaming\nexium3454.exe

Filesize
280KB

MD5
7ce7a3098963cd46086eef5d82d39d71

SHA1
b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5

SHA256
d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07

SHA512
a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a

Download Submit
memory/384-160-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/384-162-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1092-161-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1624-143-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1624-135-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/3948-144-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3948-142-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3948-140-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads