tofsee | 99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8

General

Target

99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe
Size

10.2MB
MD5

0f729848b7866ea716612093fa2440ba
SHA1

2678bfe618cc4ef9a7badd7ca789c805215cb2b9
SHA256

99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8
SHA512

56d3fba9f75645c105c3b78d5b6fb4a721aaabcda4521738caf1d6f2df144f418c5ed71f5f2ffbd4bfba4f368f884bf4bca1e273859f50a0868e479443845b79
SSDEEP

1536:PpUJsMq8nDNrnUtvDqJ55fNBVcmiCxmeZUUfOxxjDRvgdi0/z/jHNq8wR4vyKT:/6nlnZX17rpLfOz3t8FLti4v

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

103.248.137.133

59.188.74.26

115.230.124.76

111.121.193.242

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

2880 netsh.exe

pid	process
2880	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\vvuljsuu\ImagePath = "C:\\Windows\\SysWOW64\\vvuljsuu\\qoaaww.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2628 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

qoaaww.exe

pid process

2864 qoaaww.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

qoaaww.exe

description pid process target process

PID 2864 set thread context of 2628 2864 qoaaww.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

2164 sc.exe
2748 sc.exe
2868 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2628	svchost.exe

pid	process
2864	qoaaww.exe

description	pid	process	target process
PID 2864 set thread context of 2628	2864	qoaaww.exe	svchost.exe

pid	process
2164	sc.exe
2748	sc.exe
2868	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

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:

netsh.exesvchost.exe99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exesc.exesc.exeqoaaww.execmd.execmd.exesc.exe

description	ioc	process
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	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.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	qoaaww.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exeqoaaww.exe

description	pid	process	target process
PID 1352 wrote to memory of 1956	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	cmd.exe
PID 1352 wrote to memory of 1956	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	cmd.exe
PID 1352 wrote to memory of 1956	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	cmd.exe
PID 1352 wrote to memory of 1956	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	cmd.exe
PID 1352 wrote to memory of 1992	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	cmd.exe
PID 1352 wrote to memory of 1992	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	cmd.exe
PID 1352 wrote to memory of 1992	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	cmd.exe
PID 1352 wrote to memory of 1992	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	cmd.exe
PID 1352 wrote to memory of 2164	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2164	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2164	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2164	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2748	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2748	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2748	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2748	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2868	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2868	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2868	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2868	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	sc.exe
PID 1352 wrote to memory of 2880	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	netsh.exe
PID 1352 wrote to memory of 2880	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	netsh.exe
PID 1352 wrote to memory of 2880	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	netsh.exe
PID 1352 wrote to memory of 2880	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	netsh.exe
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	svchost.exe
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	svchost.exe
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	svchost.exe
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	svchost.exe
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	svchost.exe
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe
"C:\Users\Admin\AppData\Local\Temp\99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1352

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vvuljsuu\
2⤵
- System Location Discovery: System Language Discovery
PID:1956

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qoaaww.exe" C:\Windows\SysWOW64\vvuljsuu\
2⤵
- System Location Discovery: System Language Discovery
PID:1992

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create vvuljsuu binPath= "C:\Windows\SysWOW64\vvuljsuu\qoaaww.exe /d\"C:\Users\Admin\AppData\Local\Temp\99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe\"" type= own start= auto DisplayName= "P2P Support"
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2164

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description vvuljsuu "Internet Mobile Support"
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2748

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start vvuljsuu
2⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2868

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:2880

C:\Windows\SysWOW64\vvuljsuu\qoaaww.exe
C:\Windows\SysWOW64\vvuljsuu\qoaaww.exe /d"C:\Users\Admin\AppData\Local\Temp\99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2864

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
- System Location Discovery: System Language Discovery
PID:2628

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

System Information Discovery

1

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\qoaaww.exe

Filesize
12.8MB

MD5
803739923fe6a93df5ef4993bdd94ba7

SHA1
df33f4b1fa942bffff4758ada4af0bbd53537c07

SHA256
9156bcdc8725f30ec9349d06c3397ad910a4afca5d072cd43a8ddfd8d1881c3a

SHA512
22f6073fea633b46ad61c7597c8098b0e13d3578abb969523603cc5d9629ff398629ce3239ab377b1f3b12f48bd41701dcc11657bdf9cfe5989fca8f79c9e8e7

Download Submit
memory/1352-9-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1352-3-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/1352-2-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1352-1-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/1352-0-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2628-14-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download
memory/2628-16-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download
memory/2628-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2628-11-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download
memory/2628-18-0x0000000000080000-0x0000000000096000-memory.dmp

Filesize
88KB

Download
memory/2864-7-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2864-17-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads