tofsee | b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb

General

Target

b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe
Size

12.1MB
MD5

ffa1b8f70c8986ed5d92cc065e09e9d0
SHA1

a3dc175cbaf7da499dd09298e303144fac0ec032
SHA256

b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb
SHA512

60dcb3bb2d9720b8012452c57bfb4633ae5e14892bc99306a5d70864fa72dbdceae8278aec6ebf1223baf5d2ff2664b1fe88a728f8254a71ab41cd2fde3d8e4d
SSDEEP

24576:iW6y/MK+Iw9zXIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII:Z7X

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

parubey.info

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

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1728	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\hzxjobsu\ImagePath = "C:\\Windows\\SysWOW64\\hzxjobsu\\fwkhuad.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	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe

Deletes itself 1 IoCs

pid	Process
1300	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1880	fwkhuad.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1880 set thread context of 1300	1880	fwkhuad.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
3616	sc.exe
1840	sc.exe
928	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
3100	2764	WerFault.exe	83
4044	1880	WerFault.exe	99

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	fwkhuad.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 4968	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	87
PID 2764 wrote to memory of 4968	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	87
PID 2764 wrote to memory of 4968	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	87
PID 2764 wrote to memory of 216	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	89
PID 2764 wrote to memory of 216	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	89
PID 2764 wrote to memory of 216	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	89
PID 2764 wrote to memory of 3616	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	91
PID 2764 wrote to memory of 3616	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	91
PID 2764 wrote to memory of 3616	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	91
PID 2764 wrote to memory of 1840	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	93
PID 2764 wrote to memory of 1840	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	93
PID 2764 wrote to memory of 1840	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	93
PID 2764 wrote to memory of 928	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	97
PID 2764 wrote to memory of 928	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	97
PID 2764 wrote to memory of 928	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	97
PID 2764 wrote to memory of 1728	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	100
PID 2764 wrote to memory of 1728	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	100
PID 2764 wrote to memory of 1728	2764	b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe	100
PID 1880 wrote to memory of 1300	1880	fwkhuad.exe	103
PID 1880 wrote to memory of 1300	1880	fwkhuad.exe	103
PID 1880 wrote to memory of 1300	1880	fwkhuad.exe	103
PID 1880 wrote to memory of 1300	1880	fwkhuad.exe	103
PID 1880 wrote to memory of 1300	1880	fwkhuad.exe	103

C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe
"C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hzxjobsu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4968
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fwkhuad.exe" C:\Windows\SysWOW64\hzxjobsu\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:216
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hzxjobsu binPath= "C:\Windows\SysWOW64\hzxjobsu\fwkhuad.exe /d\"C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3616
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hzxjobsu "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1840
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hzxjobsu
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:928
- 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:1728
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2764 -s 1268
  2⤵
  - Program crash
  PID:3100

C:\Windows\SysWOW64\hzxjobsu\fwkhuad.exe
C:\Windows\SysWOW64\hzxjobsu\fwkhuad.exe /d"C:\Users\Admin\AppData\Local\Temp\b41909dc503614ac7de7748dc6cdbd38c09b0aaf13e0200162ddf06f30f17ceb.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1880
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1300
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1880 -s 516
  2⤵
  - Program crash
  PID:4044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1880 -ip 1880
1⤵
PID:1032

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2764 -ip 2764
1⤵
PID:3024

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\fwkhuad.exe

Filesize
11.9MB

MD5
0dac66bb83f041fa78d837acee931775

SHA1
906b9b1abdfd9dec269181072ad8520486ba25ac

SHA256
b45731d427236e2659ae2c5fbefd1046b4f348fd32e8fdd37f979842db4dc5c2

SHA512
714c69f67ef8f2ce43d971fe231c5fcd74fef4146d15b646a05438ae697a7aeb265ce5a117907916be46730aa8774fa129afc64a2b91250511c0f65c1eb3484f

Download Submit
memory/1300-10-0x0000000000370000-0x0000000000385000-memory.dmp

Filesize
84KB

Download
memory/1300-22-0x0000000000370000-0x0000000000385000-memory.dmp

Filesize
84KB

Download
memory/1300-21-0x0000000000370000-0x0000000000385000-memory.dmp

Filesize
84KB

Download
memory/1300-20-0x0000000000370000-0x0000000000385000-memory.dmp

Filesize
84KB

Download
memory/1300-14-0x0000000000370000-0x0000000000385000-memory.dmp

Filesize
84KB

Download
memory/1880-8-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1880-9-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1880-19-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2764-13-0x0000000000620000-0x0000000000720000-memory.dmp

Filesize
1024KB

Download
memory/2764-17-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2764-15-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/2764-16-0x00000000020E0000-0x00000000020F3000-memory.dmp

Filesize
76KB

Download
memory/2764-2-0x00000000020E0000-0x00000000020F3000-memory.dmp

Filesize
76KB

Download
memory/2764-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2764-1-0x0000000000620000-0x0000000000720000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads