tofsee | be5f6be838cda666934c8154d4f504f55af259d4bd3642406c539148e673a905

Analysis

max time kernel
150s
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
08/10/2024, 20:24

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General

Target
24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe
Size 14.3MB
Sample241008-y666wsshlr
SHA256 be5f6be838cda666934c8154d4f504f55af259d4bd3642406c539148e673a905
MD5 24f65dcc42b6801b30a7eb679b571372
SHA1 cc39a9bc20d111ea4654e326774cb74d84abd3cd
SHA512 d21b631b35140f7d24910857cc45fee17dd2b64d05cde3469d27d7b00a603225d73b88af80ac48d4b4055ce881224fcaceab2cb0516b0044b96ce55730ee628e
SSDEEP 196608:CvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvP:
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
2100	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\jqtuenag\ImagePath = "C:\\Windows\\SysWOW64\\jqtuenag\\obxnvcxh.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1392	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3740	obxnvcxh.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3740 set thread context of 1392	3740	obxnvcxh.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
1824	sc.exe
4904	sc.exe
1284	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2316	2372	WerFault.exe	82
1820	3740	WerFault.exe	96

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	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	obxnvcxh.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 1624	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	86
PID 2372 wrote to memory of 1624	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	86
PID 2372 wrote to memory of 1624	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	86
PID 2372 wrote to memory of 1992	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	88
PID 2372 wrote to memory of 1992	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	88
PID 2372 wrote to memory of 1992	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	88
PID 2372 wrote to memory of 1824	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	90
PID 2372 wrote to memory of 1824	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	90
PID 2372 wrote to memory of 1824	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	90
PID 2372 wrote to memory of 4904	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	92
PID 2372 wrote to memory of 4904	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	92
PID 2372 wrote to memory of 4904	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	92
PID 2372 wrote to memory of 1284	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	94
PID 2372 wrote to memory of 1284	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	94
PID 2372 wrote to memory of 1284	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	94
PID 2372 wrote to memory of 2100	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	97
PID 2372 wrote to memory of 2100	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	97
PID 2372 wrote to memory of 2100	2372	24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe	97
PID 3740 wrote to memory of 1392	3740	obxnvcxh.exe	102
PID 3740 wrote to memory of 1392	3740	obxnvcxh.exe	102
PID 3740 wrote to memory of 1392	3740	obxnvcxh.exe	102
PID 3740 wrote to memory of 1392	3740	obxnvcxh.exe	102
PID 3740 wrote to memory of 1392	3740	obxnvcxh.exe	102

C:\Users\Admin\AppData\Local\Temp\24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jqtuenag\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1624
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\obxnvcxh.exe" C:\Windows\SysWOW64\jqtuenag\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1992
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jqtuenag binPath= "C:\Windows\SysWOW64\jqtuenag\obxnvcxh.exe /d\"C:\Users\Admin\AppData\Local\Temp\24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1824
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jqtuenag "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4904
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jqtuenag
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1284
- 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:2100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2372 -s 592
  2⤵
  - Program crash
  PID:2316

C:\Windows\SysWOW64\jqtuenag\obxnvcxh.exe
C:\Windows\SysWOW64\jqtuenag\obxnvcxh.exe /d"C:\Users\Admin\AppData\Local\Temp\24f65dcc42b6801b30a7eb679b571372_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3740
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1392
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3740 -s 524
  2⤵
  - Program crash
  PID:1820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2372 -ip 2372
1⤵
PID:4332

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3740 -ip 3740
1⤵
PID:1188

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

obxnvcxh.exe

Path C:\Users\Admin\AppData\Local\Temp\obxnvcxh.exe
Size 10.4MB
SHA256 6fa9b86b36f2a25a8018e11634f0a32ec822c2c6a634e3a99b9d029d1a14a4a4
MD5 40dc0c3d27f9ebb459c9a618b766ec6e
SHA1 81350da6ffd66f35c1b2d0bf64f1605d1f9cbbe1
SHA512 174ee0672ba86960edd3c0e2ef3fc33ee7d0b46a4af5e15905e2713772ccb3fae900aa905d943544ea5d65dcfe4ffb6e8c8426fee1c2b5a956d0c437b43da4dd
SSDEEP 196608:YvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvH:
MD5 SHA1 SHA512 SSDEEP

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memory/1392-11-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

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memory/1392-13-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

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memory/1392-14-0x0000000000ED0000-0x0000000000EE5000-memory.dmp

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memory/2372-1-0x0000000002ED0000-0x0000000002FD0000-memory.dmp

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memory/2372-2-0x0000000002E10000-0x0000000002E23000-memory.dmp

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memory/2372-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2372-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/2372-9-0x0000000002E10000-0x0000000002E23000-memory.dmp

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memory/2372-8-0x0000000000400000-0x0000000002C6D000-memory.dmp

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memory/3740-15-0x0000000000400000-0x0000000002C6D000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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