tofsee | b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e

Analysis

max time kernel
119s
max time network
124s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
21-11-2024 01:05

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General

Target

b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe
Size

10.2MB
MD5

0a5435b0caf94bf65e29727f66456c25
SHA1

76eb55c90ec530ed3969c4fffbf2a64196c90673
SHA256

b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e
SHA512

115278b35b2f5c4e93cc4ddcda82c61a6a2faf5bf58ada753eed8ab3afb110c407cc0dbcc175ecc4b245a9e0ce199df96cc8bb2d07e7f7b8b9659c7052119472
SSDEEP

12288:EZv3F8h86NMcoGuc3FXE4WrIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIB:Ep3F8Au3FPW9

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
Tofsee family
tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\kcfmryvh = "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

pid	Process
2736	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\kcfmryvh\ImagePath = "C:\\Windows\\SysWOW64\\kcfmryvh\\orksqsak.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2892	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2908	orksqsak.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2908 set thread context of 2892	2908	orksqsak.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2860	sc.exe
1080	sc.exe
1376	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	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	orksqsak.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 324 wrote to memory of 2556	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	31
PID 324 wrote to memory of 2556	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	31
PID 324 wrote to memory of 2556	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	31
PID 324 wrote to memory of 2556	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	31
PID 324 wrote to memory of 1692	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	33
PID 324 wrote to memory of 1692	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	33
PID 324 wrote to memory of 1692	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	33
PID 324 wrote to memory of 1692	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	33
PID 324 wrote to memory of 1080	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	35
PID 324 wrote to memory of 1080	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	35
PID 324 wrote to memory of 1080	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	35
PID 324 wrote to memory of 1080	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	35
PID 324 wrote to memory of 1376	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	37
PID 324 wrote to memory of 1376	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	37
PID 324 wrote to memory of 1376	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	37
PID 324 wrote to memory of 1376	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	37
PID 324 wrote to memory of 2860	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	39
PID 324 wrote to memory of 2860	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	39
PID 324 wrote to memory of 2860	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	39
PID 324 wrote to memory of 2860	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	39
PID 324 wrote to memory of 2736	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	42
PID 324 wrote to memory of 2736	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	42
PID 324 wrote to memory of 2736	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	42
PID 324 wrote to memory of 2736	324	b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe	42
PID 2908 wrote to memory of 2892	2908	orksqsak.exe	44
PID 2908 wrote to memory of 2892	2908	orksqsak.exe	44
PID 2908 wrote to memory of 2892	2908	orksqsak.exe	44
PID 2908 wrote to memory of 2892	2908	orksqsak.exe	44
PID 2908 wrote to memory of 2892	2908	orksqsak.exe	44
PID 2908 wrote to memory of 2892	2908	orksqsak.exe	44

C:\Users\Admin\AppData\Local\Temp\b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe
"C:\Users\Admin\AppData\Local\Temp\b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:324
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kcfmryvh\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2556
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\orksqsak.exe" C:\Windows\SysWOW64\kcfmryvh\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1692
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kcfmryvh binPath= "C:\Windows\SysWOW64\kcfmryvh\orksqsak.exe /d\"C:\Users\Admin\AppData\Local\Temp\b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kcfmryvh "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1376
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kcfmryvh
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2860
- 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:2736

C:\Windows\SysWOW64\kcfmryvh\orksqsak.exe
C:\Windows\SysWOW64\kcfmryvh\orksqsak.exe /d"C:\Users\Admin\AppData\Local\Temp\b27e4f6888ead7b1bace259ebb494d540fe4d4398b176e53e7963222bdbbcc3e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2908
- 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:2892

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

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Downloads

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

Filesize
10.9MB

MD5
059f05203463499d4764de3f6accae50

SHA1
8f52002f4bd06be1b1bc9c433e2c945b4a620a6a

SHA256
f9df0c84ecab4f9f9aae789ec8c4c1b69d2cced093b86a29a6685a8f1cd183da

SHA512
1bf3d7b998697bfb818c52d1c36a80a1a063c428f4041b63604ec80701151990f93e26a17d6cc1c6430004f5ad4b7d855c67d8513a4449344f4f9af007511769

Download Submit
memory/324-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

Filesize
1024KB

Download
memory/324-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/324-2-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/324-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/324-8-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/2892-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2892-13-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2892-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2892-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2892-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2892-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2908-14-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads