d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07

Analysis

max time kernel
147s
max time network
50s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-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 1 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
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
524	nexium3454.exe
1952	nexium3454.exe
1640	nexium3454.exe

Loads dropped DLL 2 IoCs

pid	Process
696	Trojan-Ransom.Win32.Blocker.exe
696	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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run	Trojan-Ransom.Win32.Blocker.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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 1468 set thread context of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1748 set thread context of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 524 set thread context of 1952	524	nexium3454.exe	30
PID 1952 set thread context of 1640	1952	nexium3454.exe	31

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1468	Trojan-Ransom.Win32.Blocker.exe
1748	Trojan-Ransom.Win32.Blocker.exe
524	nexium3454.exe
1952	nexium3454.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1468 wrote to memory of 1748	1468	Trojan-Ransom.Win32.Blocker.exe	27
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 1748 wrote to memory of 696	1748	Trojan-Ransom.Win32.Blocker.exe	28
PID 696 wrote to memory of 524	696	Trojan-Ransom.Win32.Blocker.exe	29
PID 696 wrote to memory of 524	696	Trojan-Ransom.Win32.Blocker.exe	29
PID 696 wrote to memory of 524	696	Trojan-Ransom.Win32.Blocker.exe	29
PID 696 wrote to memory of 524	696	Trojan-Ransom.Win32.Blocker.exe	29
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 524 wrote to memory of 1952	524	nexium3454.exe	30
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31
PID 1952 wrote to memory of 1640	1952	nexium3454.exe	31

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:1468
- 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:1748
- - C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
    "C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies WinLogon
    - Suspicious use of WriteProcessMemory
    PID:696
  - - 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:524
    - - 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:1952
      - C:\Users\Admin\AppData\Roaming\nexium3454.exe
        
        "C:\Users\Admin\AppData\Roaming\nexium3454.exe"
        6⤵
        Modifies firewall policy service
        Executes dropped EXE
        
        PID:1640

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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

Filesize
280KB

MD5
7ce7a3098963cd46086eef5d82d39d71

SHA1
b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5

SHA256
d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07

SHA512
a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a

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

Filesize
280KB

MD5
7ce7a3098963cd46086eef5d82d39d71

SHA1
b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5

SHA256
d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07

SHA512
a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a

Download Submit
memory/696-67-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/696-73-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/696-77-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download
memory/696-78-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/696-79-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/696-70-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/696-71-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/696-68-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1640-112-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1640-111-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1748-56-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1748-59-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1748-57-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1748-62-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1748-76-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1952-109-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads