tofsee | 33ae3cdc14b1a9a867f8661f62300315ed1e22c0e8a39184644d956ac515eb06

Analysis

max time kernel
146s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2024, 21:36

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General

Target
6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe
Size 13.3MB
Sample241020-1f9kfa1fnc
SHA256 33ae3cdc14b1a9a867f8661f62300315ed1e22c0e8a39184644d956ac515eb06
MD5 6430115b4cd6b2e378cf43c17fe9b6e6
SHA1 4ee39f04cf513136d12ee205203d6fa2574e5e97
SHA512 1e2764a04d72d1f52d72b18ead17107476cd5986bf68be6fcd2cb21855cee6690526bf97eb7e6a3dc56238e252b7f4f38818578e631b2953f5b02b2725b1e5b5
SSDEEP 393216:prrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrn:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1964	netsh.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\ijxnwjef\ImagePath = "C:\\Windows\\SysWOW64\\ijxnwjef\\mykssdsa.exe"	svchost.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
924	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1464	mykssdsa.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1464 set thread context of 924	1464	mykssdsa.exe	107

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4280	sc.exe
4140	sc.exe
4700	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3784	2752	WerFault.exe	83
4452	1464	WerFault.exe	101

System Location Discovery: System Language Discovery 1 TTPs 9 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	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mykssdsa.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 4952	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	87
PID 2752 wrote to memory of 4952	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	87
PID 2752 wrote to memory of 4952	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	87
PID 2752 wrote to memory of 5020	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	91
PID 2752 wrote to memory of 5020	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	91
PID 2752 wrote to memory of 5020	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	91
PID 2752 wrote to memory of 4280	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	93
PID 2752 wrote to memory of 4280	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	93
PID 2752 wrote to memory of 4280	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	93
PID 2752 wrote to memory of 4140	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	97
PID 2752 wrote to memory of 4140	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	97
PID 2752 wrote to memory of 4140	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	97
PID 2752 wrote to memory of 4700	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	99
PID 2752 wrote to memory of 4700	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	99
PID 2752 wrote to memory of 4700	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	99
PID 2752 wrote to memory of 1964	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	102
PID 2752 wrote to memory of 1964	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	102
PID 2752 wrote to memory of 1964	2752	6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe	102
PID 1464 wrote to memory of 924	1464	mykssdsa.exe	107
PID 1464 wrote to memory of 924	1464	mykssdsa.exe	107
PID 1464 wrote to memory of 924	1464	mykssdsa.exe	107
PID 1464 wrote to memory of 924	1464	mykssdsa.exe	107
PID 1464 wrote to memory of 924	1464	mykssdsa.exe	107

C:\Users\Admin\AppData\Local\Temp\6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ijxnwjef\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4952
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mykssdsa.exe" C:\Windows\SysWOW64\ijxnwjef\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ijxnwjef binPath= "C:\Windows\SysWOW64\ijxnwjef\mykssdsa.exe /d\"C:\Users\Admin\AppData\Local\Temp\6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4280
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ijxnwjef "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4140
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ijxnwjef
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4700
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:1964
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2752 -s 1212
  2⤵
  - Program crash
  PID:3784

C:\Windows\SysWOW64\ijxnwjef\mykssdsa.exe
C:\Windows\SysWOW64\ijxnwjef\mykssdsa.exe /d"C:\Users\Admin\AppData\Local\Temp\6430115b4cd6b2e378cf43c17fe9b6e6_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:924
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1464 -s 528
  2⤵
  - Program crash
  PID:4452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2752 -ip 2752
1⤵
PID:4796

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1464 -ip 1464
1⤵
PID:1172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mykssdsa.exe

Path C:\Users\Admin\AppData\Local\Temp\mykssdsa.exe
Size 13.7MB
SHA256 7d9ad710ababc66fdd30734c46199abf38ae5d4915084772cfbdb5eb4b5928ad
MD5 7ba50737aed59d926ee8349115b30ea5
SHA1 8a13f582c97d6d79e490f67924db1f3c866f204b
SHA512 079e504c93c2ee66a5e1d9adf51771dad67805bd91d210202d9088e4ba2835e01dab7387fad19a836af0af7432246380994cffa49e57b30ae18e8a7ac7af7acf
SSDEEP 393216:arrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr:
MD5 SHA1 SHA512 SSDEEP

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memory/924-14-0x00000000008B0000-0x00000000008C5000-memory.dmp

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memory/924-17-0x00000000008B0000-0x00000000008C5000-memory.dmp

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memory/924-16-0x00000000008B0000-0x00000000008C5000-memory.dmp

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memory/1464-13-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1464-12-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1464-11-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1464-18-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/2752-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/2752-8-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/2752-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

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memory/2752-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2752-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2752-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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