tofsee | 9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b

General

Target

9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe
Size

12.3MB
MD5

9b0acbcfc4712e061a002ee15a7d0265
SHA1

c923d340cabc3373a37ce8a9dcd2ab1d1a103a5e
SHA256

9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b
SHA512

0a07827d104ac4d9ae033b3ae4f76ce4991967e0a6499707c91e084f0d70abc63cb858b7e24b3e95cd2648212f7bec06daef1108119eca75a3fc71cfe4cec6e8
SSDEEP

12288:7UVZVSo6Q0ECYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYxYK:7fo6Q0E

Score

10^/10

tofsee 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

3132 netsh.exe

pid	process
3132	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\pghequun\ImagePath = "C:\\Windows\\SysWOW64\\pghequun\\siifrdtr.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:

9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2840 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

siifrdtr.exe

pid process

5024 siifrdtr.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

siifrdtr.exe

description pid process target process

PID 5024 set thread context of 2840 5024 siifrdtr.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

1944 sc.exe
2824 sc.exe
1348 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2840	svchost.exe

pid	process
5024	siifrdtr.exe

description	pid	process	target process
PID 5024 set thread context of 2840	5024	siifrdtr.exe	svchost.exe

pid	process
1944	sc.exe
2824	sc.exe
1348	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 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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
3280	3948	WerFault.exe	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe
3972	5024	WerFault.exe	siifrdtr.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exesiifrdtr.exe

description	pid	process	target process
PID 3948 wrote to memory of 4124	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	cmd.exe
PID 3948 wrote to memory of 4124	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	cmd.exe
PID 3948 wrote to memory of 4124	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	cmd.exe
PID 3948 wrote to memory of 4732	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	cmd.exe
PID 3948 wrote to memory of 4732	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	cmd.exe
PID 3948 wrote to memory of 4732	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	cmd.exe
PID 3948 wrote to memory of 1944	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 1944	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 1944	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 2824	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 2824	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 2824	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 1348	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 1348	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 1348	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	sc.exe
PID 3948 wrote to memory of 3132	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	netsh.exe
PID 3948 wrote to memory of 3132	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	netsh.exe
PID 3948 wrote to memory of 3132	3948	9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe	netsh.exe
PID 5024 wrote to memory of 2840	5024	siifrdtr.exe	svchost.exe
PID 5024 wrote to memory of 2840	5024	siifrdtr.exe	svchost.exe
PID 5024 wrote to memory of 2840	5024	siifrdtr.exe	svchost.exe
PID 5024 wrote to memory of 2840	5024	siifrdtr.exe	svchost.exe
PID 5024 wrote to memory of 2840	5024	siifrdtr.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe
"C:\Users\Admin\AppData\Local\Temp\9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3948

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pghequun\
2⤵
PID:4124

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\siifrdtr.exe" C:\Windows\SysWOW64\pghequun\
2⤵
PID:4732

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create pghequun binPath= "C:\Windows\SysWOW64\pghequun\siifrdtr.exe /d\"C:\Users\Admin\AppData\Local\Temp\9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1944

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description pghequun "wifi internet conection"
2⤵
- Launches sc.exe
PID:2824

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start pghequun
2⤵
- Launches sc.exe
PID:1348

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
PID:3132

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3948 -s 1036
2⤵
- Program crash
PID:3280

C:\Windows\SysWOW64\pghequun\siifrdtr.exe
C:\Windows\SysWOW64\pghequun\siifrdtr.exe /d"C:\Users\Admin\AppData\Local\Temp\9327e33a90213686dbd9084127ba27e2ad729f25c42008f1f14d9db1b93b940b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5024

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:2840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5024 -s 516
2⤵
- Program crash
PID:3972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3948 -ip 3948
1⤵
PID:3196

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 5024 -ip 5024
1⤵
PID:3428

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\siifrdtr.exe
Filesize
14.9MB

MD5
786ce8c980740c7a7bbd471c5a14b821

SHA1
23349adac8418d6b70dcc9fd52305f6a48745546

SHA256
483ae6cb7da04823b01be340af32c01a8c41b7ab45ae213b7f57c1b83757380d

SHA512
dce88f0af644e8cee06a62f3858d6740a6963cda27eacd15546716d96106e89196f38bc416db51196e17c59bf1a2c8762b5bf740915ecb2b6cf80b9d74fb1d21

Download Submit
memory/2840-8-0x0000000000800000-0x0000000000815000-memory.dmp

Filesize
84KB

Download
memory/2840-14-0x0000000000800000-0x0000000000815000-memory.dmp

Filesize
84KB

Download
memory/2840-15-0x0000000000800000-0x0000000000815000-memory.dmp

Filesize
84KB

Download
memory/3948-2-0x0000000002C00000-0x0000000002C13000-memory.dmp

Filesize
76KB

Download
memory/3948-1-0x0000000002E20000-0x0000000002F20000-memory.dmp

Filesize
1024KB

Download
memory/3948-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3948-12-0x0000000002C00000-0x0000000002C13000-memory.dmp

Filesize
76KB

Download
memory/3948-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3948-10-0x0000000000400000-0x0000000002B72000-memory.dmp

Filesize
39.4MB

Download
memory/5024-11-0x0000000000400000-0x0000000002B72000-memory.dmp

Filesize
39.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads