tofsee | 26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41

Analysis

max time kernel
150s
max time network
155s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
23-11-2024 17:03

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General

Target

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe
Size

12.5MB
MD5

f5053c329648e5c62b1ecdb93d8eaaef
SHA1

9ffe4ab344356576b7d97f3067ec3cf03c9ab3f4
SHA256

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41
SHA512

e3a52d09f1133e380b649dda1d8a7998a4f111b735d5bff3b37028acfab829aaf4fbca5bb237d6c8ca63d3be8c2fadaa7e7a687e513dccbbf146af261cd351fc
SSDEEP

49152:ZvUWkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkQ:Z5

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru

lakeflex.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
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\xrxwocsv = "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
2188	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\xrxwocsv\ImagePath = "C:\\Windows\\SysWOW64\\xrxwocsv\\ldvcbsdk.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
2932	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

ldvcbsdk.exe

pid	Process
2156	ldvcbsdk.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

ldvcbsdk.exe

description	pid	Process	procid_target
PID 2156 set thread context of 2932	2156	ldvcbsdk.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
1980	sc.exe
2016	sc.exe
2212	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:

svchost.exe26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.execmd.exesc.exesc.exeldvcbsdk.execmd.exesc.exenetsh.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.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	ldvcbsdk.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	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exeldvcbsdk.exe

description	pid	Process	procid_target
PID 2380 wrote to memory of 1284	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	30
PID 2380 wrote to memory of 1284	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	30
PID 2380 wrote to memory of 1284	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	30
PID 2380 wrote to memory of 1284	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	30
PID 2380 wrote to memory of 2984	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	32
PID 2380 wrote to memory of 2984	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	32
PID 2380 wrote to memory of 2984	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	32
PID 2380 wrote to memory of 2984	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	32
PID 2380 wrote to memory of 1980	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	34
PID 2380 wrote to memory of 1980	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	34
PID 2380 wrote to memory of 1980	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	34
PID 2380 wrote to memory of 1980	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	34
PID 2380 wrote to memory of 2016	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	36
PID 2380 wrote to memory of 2016	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	36
PID 2380 wrote to memory of 2016	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	36
PID 2380 wrote to memory of 2016	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	36
PID 2380 wrote to memory of 2212	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	38
PID 2380 wrote to memory of 2212	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	38
PID 2380 wrote to memory of 2212	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	38
PID 2380 wrote to memory of 2212	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	38
PID 2380 wrote to memory of 2188	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	41
PID 2380 wrote to memory of 2188	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	41
PID 2380 wrote to memory of 2188	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	41
PID 2380 wrote to memory of 2188	2380	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	41
PID 2156 wrote to memory of 2932	2156	ldvcbsdk.exe	44
PID 2156 wrote to memory of 2932	2156	ldvcbsdk.exe	44
PID 2156 wrote to memory of 2932	2156	ldvcbsdk.exe	44
PID 2156 wrote to memory of 2932	2156	ldvcbsdk.exe	44
PID 2156 wrote to memory of 2932	2156	ldvcbsdk.exe	44
PID 2156 wrote to memory of 2932	2156	ldvcbsdk.exe	44

C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe
"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xrxwocsv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1284
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ldvcbsdk.exe" C:\Windows\SysWOW64\xrxwocsv\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2984
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xrxwocsv binPath= "C:\Windows\SysWOW64\xrxwocsv\ldvcbsdk.exe /d\"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1980
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xrxwocsv "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2016
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xrxwocsv
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2212
- 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:2188

C:\Windows\SysWOW64\xrxwocsv\ldvcbsdk.exe
C:\Windows\SysWOW64\xrxwocsv\ldvcbsdk.exe /d"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2156
- 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:2932

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\ldvcbsdk.exe

Filesize
12.3MB

MD5
43d3c5448322e46181e9dfe898530d18

SHA1
a2bca7a5c51a9af40e4f335eddd776c587cbf00d

SHA256
a5882a785614269518a2decf28eab25255966440a83ee7df8b03f17d2bb8649f

SHA512
4c3d86cc3bc57a3aefd04168806e7479c4d8dbe870ddccc8c9885ee078fa77098a4926b7c75c83e104e73345289eb03088e60a8792cbb791f1f01daaed7f988e

Download Submit
memory/2156-18-0x0000000000400000-0x0000000002DA4000-memory.dmp

Filesize
41.6MB

Download
memory/2380-10-0x0000000002E40000-0x0000000002F40000-memory.dmp

Filesize
1024KB

Download
memory/2380-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2380-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2380-11-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2380-1-0x0000000002E40000-0x0000000002F40000-memory.dmp

Filesize
1024KB

Download
memory/2380-8-0x0000000000400000-0x0000000002DA4000-memory.dmp

Filesize
41.6MB

Download
memory/2380-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2932-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2932-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2932-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2932-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2932-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download