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
1180	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\kvfibhuj\ImagePath = "C:\\Windows\\SysWOW64\\kvfibhuj\\ragrpew.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe

Deletes itself 1 IoCs

pid	Process
4268	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1140	ragrpew.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1140 set thread context of 4268	1140	ragrpew.exe	97

Launches sc.exe 3 IoCs

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

pid	Process
2012	sc.exe
2920	sc.exe
2124	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	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	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	ragrpew.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 3384	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	83
PID 3016 wrote to memory of 3384	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	83
PID 3016 wrote to memory of 3384	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	83
PID 3016 wrote to memory of 4544	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	85
PID 3016 wrote to memory of 4544	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	85
PID 3016 wrote to memory of 4544	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	85
PID 3016 wrote to memory of 2012	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	87
PID 3016 wrote to memory of 2012	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	87
PID 3016 wrote to memory of 2012	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	87
PID 3016 wrote to memory of 2920	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	90
PID 3016 wrote to memory of 2920	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	90
PID 3016 wrote to memory of 2920	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	90
PID 3016 wrote to memory of 2124	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	92
PID 3016 wrote to memory of 2124	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	92
PID 3016 wrote to memory of 2124	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	92
PID 3016 wrote to memory of 1180	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	95
PID 3016 wrote to memory of 1180	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	95
PID 3016 wrote to memory of 1180	3016	0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe	95
PID 1140 wrote to memory of 4268	1140	ragrpew.exe	97
PID 1140 wrote to memory of 4268	1140	ragrpew.exe	97
PID 1140 wrote to memory of 4268	1140	ragrpew.exe	97
PID 1140 wrote to memory of 4268	1140	ragrpew.exe	97
PID 1140 wrote to memory of 4268	1140	ragrpew.exe	97

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:3016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kvfibhuj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ragrpew.exe" C:\Windows\SysWOW64\kvfibhuj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4544
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kvfibhuj binPath= "C:\Windows\SysWOW64\kvfibhuj\ragrpew.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:2012
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kvfibhuj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2920
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kvfibhuj
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2124
- 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:1180

C:\Windows\SysWOW64\kvfibhuj\ragrpew.exe
C:\Windows\SysWOW64\kvfibhuj\ragrpew.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:1140
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4268

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\ragrpew.exe

Filesize
11.0MB

MD5
cf4efd24d32d1e348762a57ee07b8229

SHA1
96484638eeee608118f5cbbca3e42bb50d45fe8e

SHA256
176c396737c698f1088f449f5bd90a7b39a6027719314f54286c8469a85d819a

SHA512
fcaf644a2e363a585247ef922a589167690fa947067d15181220d27285e128e6d2f322f4693072d9bbe0f69d78a953510f047c7da4c0b55552f094817ac02c60

Download Submit
memory/1140-14-0x0000000000400000-0x0000000002284000-memory.dmp

Filesize
30.5MB

Download
memory/3016-1-0x0000000002440000-0x0000000002540000-memory.dmp

Filesize
1024KB

Download
memory/3016-2-0x0000000003FE0000-0x0000000003FF3000-memory.dmp

Filesize
76KB

Download
memory/3016-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3016-7-0x0000000000400000-0x0000000002284000-memory.dmp

Filesize
30.5MB

Download
memory/3016-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3016-8-0x0000000003FE0000-0x0000000003FF3000-memory.dmp

Filesize
76KB

Download
memory/4268-11-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download
memory/4268-13-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download
memory/4268-15-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads