04f3902ed9640941f685d4d05bc4b39cff0198fd66f6a7d771d18fe8236b9f6f

General

Target
jaffacakes118_Backdoor.Win32.DsBot.bp.exe
Size 36KB
Sample261018-3vygtsdb28
SHA256 04f3902ed9640941f685d4d05bc4b39cff0198fd66f6a7d771d18fe8236b9f6f
MD5 f652576f6e116c5712157d693342e13c
SHA1 f8135c1ea23594b480436f1e319bbc9127a3a737
SHA512 808d7a31ec3533db7edc408e838675de28b1887c4eaabeea048b49f59164f7983c0b46a6246e41fff7b2c17bc857edf2744653c0c1040c2531010f4ee914baae
SSDEEP 768:ITdkpW1lKbbVIDZNV7QsOdx2nkQWOycuZPyrAd1WQE4VcWluHbP7i:Ksb+FNBQss2nRWOmk20H3Hb+
TLSH
T186F2F18072808D65F1192AB6B880DFFCB01877452FFFA46B037AD839AA435719DB6375
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery trojan

Malware Config

Signatures

Modifies security service 2 TTPs 1 IoCs

defense_evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	smss.exe

Windows security bypass 2 TTPs 5 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	smss.exe

Looks for VMWare Tools registry key 2 TTPs 2 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	jaffacakes118_Backdoor.Win32.DsBot.bp.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	smss.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4112	smss.exe

Executes dropped EXE 1 IoCs

pid	Process
4112	smss.exe

Windows security modification 2 TTPs 5 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	smss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	smss.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\smss.exe	jaffacakes118_Backdoor.Win32.DsBot.bp.exe
File opened for modification	C:\Windows\smss.exe	jaffacakes118_Backdoor.Win32.DsBot.bp.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	smss.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	smss.exe

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	jaffacakes118_Backdoor.Win32.DsBot.bp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	smss.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	smss.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	smss.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	smss.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	smss.exe

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Backdoor.Win32.DsBot.bp.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Backdoor.Win32.DsBot.bp.exe"
1⤵
- Looks for VMWare Tools registry key
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
PID:2000

C:\Windows\smss.exe
"C:\Windows\smss.exe"
1⤵
- Modifies security service
- Windows security bypass
- Looks for VMWare Tools registry key
- Deletes itself
- Executes dropped EXE
- Windows security modification
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4112

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify Tools

2

T1562.001

Indicator Removal

1

T1070

File Deletion

Modify Registry

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

smss.exe

Path C:\Windows\smss.exe
Size 36KB
SHA256 04f3902ed9640941f685d4d05bc4b39cff0198fd66f6a7d771d18fe8236b9f6f
MD5 f652576f6e116c5712157d693342e13c
SHA1 f8135c1ea23594b480436f1e319bbc9127a3a737
SHA512 808d7a31ec3533db7edc408e838675de28b1887c4eaabeea048b49f59164f7983c0b46a6246e41fff7b2c17bc857edf2744653c0c1040c2531010f4ee914baae
SSDEEP 768:ITdkpW1lKbbVIDZNV7QsOdx2nkQWOycuZPyrAd1WQE4VcWluHbP7i:Ksb+FNBQss2nRWOmk20H3Hb+
TLSH
T186F2F18072808D65F1192AB6B880DFFCB01877452FFFA46B037AD839AA435719DB6375
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads