6b01739ae861af88af02c4ccfb5cffe22f527cb1c9c34577b3e107a1f50a4f2a

General

Target

Trojan-Ransom.Win32.Blocker.exe
Size

488KB
MD5

07d2270122bdba8f4958d5fbbd4b2dda
SHA1

68d95b38333515a80e0a7941cd98c0bc0229274b
SHA256

6b01739ae861af88af02c4ccfb5cffe22f527cb1c9c34577b3e107a1f50a4f2a
SHA512

ab6c97cd159ec67cc9f686302d8778379c0419a407588c7510b302052e1660c753b2d13b612348950c137c9fbb9ec32677e19cdb0d4b9332876dfdbbeb6c733a
SSDEEP

12288:lQ8qK0qjIQnAzRK0qjIQnAkYK0qjIQnAYwP+u:lQ8qK0qjIGANK0qjIGA/K0qjIGAYwP+u

Score

10^/10

persistence upx

Malware Config

Signatures

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\drivers\\spools.exe \"%1\" %*"	Trojan-Ransom.Win32.Blocker.exe

Drops file in Drivers directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\drivers\spools.exe	Trojan-Ransom.Win32.Blocker.exe
File opened for modification	C:\Windows\SysWOW64\drivers\spools.exe	Trojan-Ransom.Win32.Blocker.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Schedule\ImagePath = "C:\\Windows\\system32\\drivers\\spools.exe"	Trojan-Ransom.Win32.Blocker.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1104-57-0x0000000000400000-0x0000000001564000-memory.dmp	upx

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe"	Trojan-Ransom.Win32.Blocker.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\cftmon.exe"	Trojan-Ransom.Win32.Blocker.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe"	Trojan-Ransom.Win32.Blocker.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\cftmon.exe"	Trojan-Ransom.Win32.Blocker.exe

Enumerates connected drives 3 TTPs 20 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\G:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\M:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\Q:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\U:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\T:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\X:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\J:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\K:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\N:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\O:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\P:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\S:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\V:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\W:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\E:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\F:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\H:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\I:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\L:	Trojan-Ransom.Win32.Blocker.exe
File opened (read-only)	\??\R:	Trojan-Ransom.Win32.Blocker.exe

Modifies registry class 1 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\drivers\\spools.exe \"%1\" %*"	Trojan-Ransom.Win32.Blocker.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1104 wrote to memory of 936	1104	Trojan-Ransom.Win32.Blocker.exe	27
PID 1104 wrote to memory of 936	1104	Trojan-Ransom.Win32.Blocker.exe	27
PID 1104 wrote to memory of 936	1104	Trojan-Ransom.Win32.Blocker.exe	27
PID 1104 wrote to memory of 936	1104	Trojan-Ransom.Win32.Blocker.exe	27
PID 1104 wrote to memory of 888	1104	Trojan-Ransom.Win32.Blocker.exe	29
PID 1104 wrote to memory of 888	1104	Trojan-Ransom.Win32.Blocker.exe	29
PID 1104 wrote to memory of 888	1104	Trojan-Ransom.Win32.Blocker.exe	29
PID 1104 wrote to memory of 888	1104	Trojan-Ransom.Win32.Blocker.exe	29

C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
"C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
1⤵
- Modifies system executable filetype association
- Drops file in Drivers directory
- Sets service image path in registry
- Adds Run key to start application
- Enumerates connected drives
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1104
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c rmdir /S /Q "C:\Users\Admin\Cookies\"
  2⤵
  PID:936
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c rmdir /S /Q "C:\Users\Admin\Application Data\Macromedia\Flash Player\"
  2⤵
  PID:888

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

1

T1042

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1104-56-0x0000000075BB1000-0x0000000075BB3000-memory.dmp

Filesize
8KB

Download
memory/1104-57-0x0000000000400000-0x0000000001564000-memory.dmp

Filesize
17.4MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads