5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026

General

Target
5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe
Size 93KB
Sample241110-eav9zayhlc
SHA256 5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026
MD5 f3149f58d1635e49ecd3c0f2d2ef5e50
SHA1 24ec5ff9c43dc8f1d3521e6b5d732adfcdf220ea
SHA512 30fd02408df22d57a894ca620fdb8635e4474935e309ef4995413ecbb6e44755171889deb4b93f91df183aeaf882c06e3e5f3572fff5ed1a97f4677df80d45fb
SSDEEP 1536:42lTb6wb9mizg3qtKklJ6RBvqtKklJ6RBpp9UoJ:42lTveqBloDqBloz
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

adware defense_evasion discovery persistence stealer upx

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 = "Explorer.exe"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe

Drops file in Drivers directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\drivers\spools.exe	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe
File opened for modification	C:\Windows\SysWOW64\drivers\spools.exe	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Schedule\ImagePath = "C:\\Windows\\system32\\drivers\\spools.exe"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\drivers\\spools.exe \"%1\" %*"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.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\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\cftmon.exe"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ntuser = "C:\\Windows\\system32\\drivers\\spools.exe"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\autoload = "C:\\Users\\Admin\\cftmon.exe"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Installs/modifies Browser Helper Object 2 TTPs 3 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects	reg.exe

Modifies WinLogon 2 TTPs 1 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\UIHost = "logonui.exe"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/384-0-0x0000000000400000-0x0000000001565000-memory.dmp	upx
behavioral2/files/0x000c000000023bb1-5.dat	upx
behavioral2/memory/384-6-0x0000000000400000-0x0000000001565000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 4 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.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\" %*"	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 384 wrote to memory of 1452	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	84
PID 384 wrote to memory of 1452	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	84
PID 384 wrote to memory of 1452	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	84
PID 384 wrote to memory of 4548	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	85
PID 384 wrote to memory of 4548	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	85
PID 384 wrote to memory of 4548	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	85
PID 384 wrote to memory of 376	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	88
PID 384 wrote to memory of 376	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	88
PID 384 wrote to memory of 376	384	5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe	88

C:\Users\Admin\AppData\Local\Temp\5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe
"C:\Users\Admin\AppData\Local\Temp\5f7a3d7c9dc9d3ec9e84f7e0d2d1307d53d39403e66cfbcb0455d79ad5cbf026N.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in Drivers directory
- Sets service image path in registry
- Modifies system executable filetype association
- Adds Run key to start application
- Modifies WinLogon
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:384
- C:\Windows\SysWOW64\reg.exe
  reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
  2⤵
  - Installs/modifies Browser Helper Object
  - System Location Discovery: System Language Discovery
  PID:1452
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c rmdir /S /Q "C:\Users\Admin\Cookies\"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4548
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c rmdir /S /Q "C:\Users\Admin\Application Data\Macromedia\Flash Player\"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

4

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

Browser Extensions

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

4

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

2

T1547.004

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Defense Evasion

Indicator Removal

1

T1070

File Deletion

Modify Registry

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

spools.exe

Path C:\Windows\SysWOW64\drivers\spools.exe
Size 120KB
SHA256 ea2b69f2bcd694d5109cac0c15540e752d087a9f56d8bfc1adf08570efa6f81a
MD5 0c9c7f6f42626632cd0ecb39ee77a00a
SHA1 59cb0c7ff88343951cbdc84db634685f14a6e2ab
SHA512 c8921e4263a07f49c94ac81699f612ec046e53d239ae57413e80bed35a8a8025439103ee7359f40ec44b08cdef2126a27a3e67d157f0e556085b6c51cc4dc597
SSDEEP 1536:42lTb6wb9mizg3qtKklJ6RBvqtKklJ6RBpp9Uo6NKXeW+dgzKjo:42lTveqBloDqBlosNKuX1o
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/384-0-0x0000000000400000-0x0000000001565000-memory.dmp

Download

memory/384-6-0x0000000000400000-0x0000000001565000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads