tofsee | 0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647

General

Target

0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe
Size

10.7MB
MD5

27d42e4a1a5137d5a8171fa0998feff6
SHA1

c286cbcc0c3840a5c086016a9f432acdb2466bf5
SHA256

0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647
SHA512

2df5b37a8d89a632b780c2e01c0407216b66e2c9495b55d5fb7f984d6eaad409d2a1cc1f6c25f4c26b7e0c13cc89731d0f7baef1f781da642e31cea358c422db
SSDEEP

3072:WcSKLbut7BWLMcD/FHNKZuKqtyONJvq4H6gGIvuFHrHtIxJXA4/a9t/a9t/a9t/6:gKHOWwe/RNKkK0vNdq4HZG0Wr2u

Score

10^/10

tofsee defense_evasion discovery execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

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

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1996	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\kzkcasdy\ImagePath = "C:\\Windows\\SysWOW64\\kzkcasdy\\ehalluvv.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe

Deletes itself 1 IoCs

pid	Process
2968	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3300	ehalluvv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3300 set thread context of 2968	3300	ehalluvv.exe	99

Launches sc.exe 3 IoCs

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

pid	Process
1956	sc.exe
4240	sc.exe
2140	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

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	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ehalluvv.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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1116 wrote to memory of 1384	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	85
PID 1116 wrote to memory of 1384	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	85
PID 1116 wrote to memory of 1384	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	85
PID 1116 wrote to memory of 5080	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	87
PID 1116 wrote to memory of 5080	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	87
PID 1116 wrote to memory of 5080	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	87
PID 1116 wrote to memory of 4240	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	89
PID 1116 wrote to memory of 4240	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	89
PID 1116 wrote to memory of 4240	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	89
PID 1116 wrote to memory of 2140	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	92
PID 1116 wrote to memory of 2140	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	92
PID 1116 wrote to memory of 2140	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	92
PID 1116 wrote to memory of 1956	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	94
PID 1116 wrote to memory of 1956	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	94
PID 1116 wrote to memory of 1956	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	94
PID 1116 wrote to memory of 1996	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	97
PID 1116 wrote to memory of 1996	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	97
PID 1116 wrote to memory of 1996	1116	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	97
PID 3300 wrote to memory of 2968	3300	ehalluvv.exe	99
PID 3300 wrote to memory of 2968	3300	ehalluvv.exe	99
PID 3300 wrote to memory of 2968	3300	ehalluvv.exe	99
PID 3300 wrote to memory of 2968	3300	ehalluvv.exe	99
PID 3300 wrote to memory of 2968	3300	ehalluvv.exe	99

C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe
"C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1116
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kzkcasdy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ehalluvv.exe" C:\Windows\SysWOW64\kzkcasdy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kzkcasdy binPath= "C:\Windows\SysWOW64\kzkcasdy\ehalluvv.exe /d\"C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4240
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kzkcasdy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2140
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kzkcasdy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1956
- 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:1996

C:\Windows\SysWOW64\kzkcasdy\ehalluvv.exe
C:\Windows\SysWOW64\kzkcasdy\ehalluvv.exe /d"C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3300
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ehalluvv.exe

Filesize
10.1MB

MD5
8469d73bb982fc46ebb8090ddd1cb20a

SHA1
81e94ec2c9dd4d3eb46fa2627d3dae8454ac2f4b

SHA256
d598bb11a33476a7fb5f74e218bcc34ae7976ba49afc16c7c1959df306558dfa

SHA512
a9fb5849b1d2595cfc53485e3b4071a63100077ad908233579c88f307c069bd0cb5c80bc0e4d8e18ccc6055d072cc599e46c7cade008bc13e3bce137e30df955

Download Submit
memory/1116-1-0x0000000002620000-0x0000000002720000-memory.dmp

Filesize
1024KB

Download
memory/1116-2-0x0000000002540000-0x0000000002553000-memory.dmp

Filesize
76KB

Download
memory/1116-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1116-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1116-8-0x0000000002540000-0x0000000002553000-memory.dmp

Filesize
76KB

Download
memory/1116-7-0x0000000000400000-0x0000000002284000-memory.dmp

Filesize
30.5MB

Download
memory/2968-11-0x0000000000B80000-0x0000000000B95000-memory.dmp

Filesize
84KB

Download
memory/2968-14-0x0000000000B80000-0x0000000000B95000-memory.dmp

Filesize
84KB

Download
memory/2968-15-0x0000000000B80000-0x0000000000B95000-memory.dmp

Filesize
84KB

Download
memory/3300-12-0x0000000000400000-0x0000000002284000-memory.dmp

Filesize
30.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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