tofsee | fc8b39e1550508fc277adb212c06b4d858eec204fe9157947fcd8db28296a1d4

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-09-2024 23:51

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General

Target

8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe
Size

14.6MB
MD5

e22e7c6baeebd701b760f4a27a02d8c4
SHA1

1b924330a134a074ecb6f59affde76d6989100c0
SHA256

8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda
SHA512

aa15560cb2fee8ae0c07acc6403f1ec9f33dc63cd6965d5e8af2f645970bb3c0fb7cec48646ddcaaa0fbef010bcdbc0468ea5c78658ea25994d1e1cd80e904e4
SSDEEP

98304:SC+PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPf:x

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\fscrmjqs = "0"	svchost.exe

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
2800	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\fscrmjqs\ImagePath = "C:\\Windows\\SysWOW64\\fscrmjqs\\iupmtssg.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
2656	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

iupmtssg.exe

pid	Process
2764	iupmtssg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

iupmtssg.exe

description	pid	Process	procid_target
PID 2764 set thread context of 2656	2764	iupmtssg.exe	44

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
2856	sc.exe
2988	sc.exe
3056	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

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:

cmd.exesc.exesc.exenetsh.exesvchost.exe8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.execmd.exesc.exeiupmtssg.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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.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	iupmtssg.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exeiupmtssg.exe

description	pid	Process	procid_target
PID 2496 wrote to memory of 2316	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	30
PID 2496 wrote to memory of 2316	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	30
PID 2496 wrote to memory of 2316	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	30
PID 2496 wrote to memory of 2316	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	30
PID 2496 wrote to memory of 2084	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	32
PID 2496 wrote to memory of 2084	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	32
PID 2496 wrote to memory of 2084	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	32
PID 2496 wrote to memory of 2084	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	32
PID 2496 wrote to memory of 2856	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	34
PID 2496 wrote to memory of 2856	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	34
PID 2496 wrote to memory of 2856	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	34
PID 2496 wrote to memory of 2856	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	34
PID 2496 wrote to memory of 2988	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	36
PID 2496 wrote to memory of 2988	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	36
PID 2496 wrote to memory of 2988	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	36
PID 2496 wrote to memory of 2988	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	36
PID 2496 wrote to memory of 3056	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	38
PID 2496 wrote to memory of 3056	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	38
PID 2496 wrote to memory of 3056	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	38
PID 2496 wrote to memory of 3056	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	38
PID 2496 wrote to memory of 2800	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	41
PID 2496 wrote to memory of 2800	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	41
PID 2496 wrote to memory of 2800	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	41
PID 2496 wrote to memory of 2800	2496	8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe	41
PID 2764 wrote to memory of 2656	2764	iupmtssg.exe	44
PID 2764 wrote to memory of 2656	2764	iupmtssg.exe	44
PID 2764 wrote to memory of 2656	2764	iupmtssg.exe	44
PID 2764 wrote to memory of 2656	2764	iupmtssg.exe	44
PID 2764 wrote to memory of 2656	2764	iupmtssg.exe	44
PID 2764 wrote to memory of 2656	2764	iupmtssg.exe	44

C:\Users\Admin\AppData\Local\Temp\8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe
"C:\Users\Admin\AppData\Local\Temp\8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fscrmjqs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2316
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iupmtssg.exe" C:\Windows\SysWOW64\fscrmjqs\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2084
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fscrmjqs binPath= "C:\Windows\SysWOW64\fscrmjqs\iupmtssg.exe /d\"C:\Users\Admin\AppData\Local\Temp\8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2856
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fscrmjqs "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2988
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fscrmjqs
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3056
- 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:2800

C:\Windows\SysWOW64\fscrmjqs\iupmtssg.exe
C:\Windows\SysWOW64\fscrmjqs\iupmtssg.exe /d"C:\Users\Admin\AppData\Local\Temp\8f770e85d9789cd77a5ebdf321ae54f5162d4b28c9f929ba4bf109bb770acfda.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2656

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

Disable or Modify Tools

T1562.001

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\iupmtssg.exe

Filesize
12.8MB

MD5
e10a7cfcaefb757c5a8dffd9dce840ac

SHA1
42d8516945c26e4a403547c8b640e965d84d6031

SHA256
9edb000fa60f37516117e36796ad75079628b299ee1ef04db55c5b89e2d4fad5

SHA512
6541f0a7c67e6cd58d32810c4603a8adcb8b3960bca188b81fade215c1ef6492e84e1612d4f70ff4cbce8ab35cac279931787865122e3bd715f321885e371469

Download Submit
memory/2496-8-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/2496-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2496-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2496-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2496-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2496-1-0x00000000008F0000-0x00000000009F0000-memory.dmp

Filesize
1024KB

Download
memory/2656-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2656-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2656-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2656-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2656-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2764-16-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download