tofsee | 99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8

Analysis

max time kernel
56s
max time network
63s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-10-2024 19:23

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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

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

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

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

pid	Process
2628	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2864	qoaaww.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2864 set thread context of 2628	2864	qoaaww.exe	43

Launches sc.exe 3 IoCs

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

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

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	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

description	pid	Process	procid_target
PID 1352 wrote to memory of 1956	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	30
PID 1352 wrote to memory of 1956	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	30
PID 1352 wrote to memory of 1956	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	30
PID 1352 wrote to memory of 1956	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	30
PID 1352 wrote to memory of 1992	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	32
PID 1352 wrote to memory of 1992	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	32
PID 1352 wrote to memory of 1992	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	32
PID 1352 wrote to memory of 1992	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	32
PID 1352 wrote to memory of 2164	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	34
PID 1352 wrote to memory of 2164	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	34
PID 1352 wrote to memory of 2164	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	34
PID 1352 wrote to memory of 2164	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	34
PID 1352 wrote to memory of 2748	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	36
PID 1352 wrote to memory of 2748	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	36
PID 1352 wrote to memory of 2748	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	36
PID 1352 wrote to memory of 2748	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	36
PID 1352 wrote to memory of 2868	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	38
PID 1352 wrote to memory of 2868	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	38
PID 1352 wrote to memory of 2868	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	38
PID 1352 wrote to memory of 2868	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	38
PID 1352 wrote to memory of 2880	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	41
PID 1352 wrote to memory of 2880	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	41
PID 1352 wrote to memory of 2880	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	41
PID 1352 wrote to memory of 2880	1352	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	41
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	43
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	43
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	43
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	43
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	43
PID 2864 wrote to memory of 2628	2864	qoaaww.exe	43

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

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

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