tofsee | 74f055ccb9d657d623b62d41f22317c883d22e2cf4496b54d0d6ba5d1358d426

General

Target

50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe
Size

13.2MB
MD5

5c22dd0023f2924fd7804a0ddbf7ae78
SHA1

280c5a888f5e30d0858b809611c47308b4e8bab4
SHA256

50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8
SHA512

437e049e5ba7477b857b57f56f038f1f7d33e9edc78a5ac853eec6604aabe1eea801e45d4b9655aac230e5885a3a1e920d1b2d6409a215934f2768d0e167e254
SSDEEP

6144:UDVCynACXF+pI0zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzP:k8vmF+p

Score

10^/10

tofsee discovery evasion 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
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

Processes:

netsh.exe

pid process

3096 netsh.exe

pid	process
3096	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\hcydczpv\ImagePath = "C:\\Windows\\SysWOW64\\hcydczpv\\ipobjjrv.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

Processes:

50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3620 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

ipobjjrv.exe

pid process

2668 ipobjjrv.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ipobjjrv.exe

description pid process target process

PID 2668 set thread context of 3620 2668 ipobjjrv.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

5036 sc.exe
4740 sc.exe
4624 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3620	svchost.exe

pid	process
2668	ipobjjrv.exe

description	pid	process	target process
PID 2668 set thread context of 3620	2668	ipobjjrv.exe	svchost.exe

pid	process
5036	sc.exe
4740	sc.exe
4624	sc.exe

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

Processes:

netsh.exe

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

Processes:

cmd.exesc.exesc.exeipobjjrv.exe50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.execmd.exesc.exenetsh.exesvchost.exe

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	ipobjjrv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.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	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exeipobjjrv.exe

description	pid	process	target process
PID 3720 wrote to memory of 2016	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	cmd.exe
PID 3720 wrote to memory of 2016	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	cmd.exe
PID 3720 wrote to memory of 2016	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	cmd.exe
PID 3720 wrote to memory of 1316	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	cmd.exe
PID 3720 wrote to memory of 1316	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	cmd.exe
PID 3720 wrote to memory of 1316	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	cmd.exe
PID 3720 wrote to memory of 4624	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 3720 wrote to memory of 4624	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 3720 wrote to memory of 4624	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 3720 wrote to memory of 5036	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 3720 wrote to memory of 5036	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 3720 wrote to memory of 5036	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 3720 wrote to memory of 4740	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 3720 wrote to memory of 4740	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 3720 wrote to memory of 4740	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	sc.exe
PID 2668 wrote to memory of 3620	2668	ipobjjrv.exe	svchost.exe
PID 2668 wrote to memory of 3620	2668	ipobjjrv.exe	svchost.exe
PID 2668 wrote to memory of 3620	2668	ipobjjrv.exe	svchost.exe
PID 2668 wrote to memory of 3620	2668	ipobjjrv.exe	svchost.exe
PID 2668 wrote to memory of 3620	2668	ipobjjrv.exe	svchost.exe
PID 3720 wrote to memory of 3096	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	netsh.exe
PID 3720 wrote to memory of 3096	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	netsh.exe
PID 3720 wrote to memory of 3096	3720	50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe
"C:\Users\Admin\AppData\Local\Temp\50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hcydczpv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipobjjrv.exe" C:\Windows\SysWOW64\hcydczpv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1316
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hcydczpv binPath= "C:\Windows\SysWOW64\hcydczpv\ipobjjrv.exe /d\"C:\Users\Admin\AppData\Local\Temp\50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hcydczpv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5036
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hcydczpv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4740
- 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:3096

C:\Windows\SysWOW64\hcydczpv\ipobjjrv.exe
C:\Windows\SysWOW64\hcydczpv\ipobjjrv.exe /d"C:\Users\Admin\AppData\Local\Temp\50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2668
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3620

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1036,i,4356837537417149674,16553092232944545509,262144 --variations-seed-version --mojo-platform-channel-handle=4100 /prefetch:8
1⤵
PID:3328

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\ipobjjrv.exe

Filesize
13.9MB

MD5
ca915f03842eac51d527126e422523da

SHA1
c5db3dce44715fcf579c379fc9bb002cc29dd271

SHA256
d838031a9fc35059f52027adbb43cdabfcb020ad3eef5bf122e2fb1e164ca05c

SHA512
245e219f9264a73e612da27ca71a1074fdb953bb8ad2b17d38049a06e988b4cb264cee8485e1494353324121f28e3e4f2f92d2522bede74c4add65fd4ff80a98

Download Submit
memory/3620-3-0x0000000000CB0000-0x0000000000CC5000-memory.dmp

Filesize
84KB

Download
memory/3620-6-0x0000000000CB0000-0x0000000000CC5000-memory.dmp

Filesize
84KB

Download
memory/3620-7-0x0000000000CB0000-0x0000000000CC5000-memory.dmp

Filesize
84KB

Download
memory/3620-8-0x0000000000CB0000-0x0000000000CC5000-memory.dmp

Filesize
84KB

Download
memory/3620-9-0x0000000000CB0000-0x0000000000CC5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads