tofsee | bb55c73dc38027d6366b3403767f6036bd8671771183040d8db36e8da2eb6ec1

Analysis

max time kernel
148s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-12-2024 18:43

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General

Target

2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe
Size

10.0MB
MD5

3a2ed34c3dc624d64a485f8634dde112
SHA1

7b8b4aece7c01011127c489c5cd97130ba6f483b
SHA256

bb55c73dc38027d6366b3403767f6036bd8671771183040d8db36e8da2eb6ec1
SHA512

d56e7f26a625e4a2791dee32feb5e3ffdd8db041196a177287d4e09e220b78a9306013f0f23f9d9f41d6d9803f39211d35d5eae17ad3b9631597ad823996282e
SSDEEP

6144:oXxZveEydmxZnXNMRaTuMUifWLKxNMMMMMMMbgb:oXzvvygxZnXxr+mxNMMMMMMMbg

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.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

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\zykxrebn = "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
2544	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\zykxrebn\ImagePath = "C:\\Windows\\SysWOW64\\zykxrebn\\fhctkele.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2292	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2600	fhctkele.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2600 set thread context of 2292	2600	fhctkele.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2940	sc.exe
2296	sc.exe
2684	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	fhctkele.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 2816	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	30
PID 2092 wrote to memory of 2816	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	30
PID 2092 wrote to memory of 2816	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	30
PID 2092 wrote to memory of 2816	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	30
PID 2092 wrote to memory of 2672	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	32
PID 2092 wrote to memory of 2672	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	32
PID 2092 wrote to memory of 2672	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	32
PID 2092 wrote to memory of 2672	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	32
PID 2092 wrote to memory of 2940	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	34
PID 2092 wrote to memory of 2940	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	34
PID 2092 wrote to memory of 2940	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	34
PID 2092 wrote to memory of 2940	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	34
PID 2092 wrote to memory of 2296	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	36
PID 2092 wrote to memory of 2296	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	36
PID 2092 wrote to memory of 2296	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	36
PID 2092 wrote to memory of 2296	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	36
PID 2092 wrote to memory of 2684	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	38
PID 2092 wrote to memory of 2684	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	38
PID 2092 wrote to memory of 2684	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	38
PID 2092 wrote to memory of 2684	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	38
PID 2092 wrote to memory of 2544	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	41
PID 2092 wrote to memory of 2544	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	41
PID 2092 wrote to memory of 2544	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	41
PID 2092 wrote to memory of 2544	2092	2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe	41
PID 2600 wrote to memory of 2292	2600	fhctkele.exe	43
PID 2600 wrote to memory of 2292	2600	fhctkele.exe	43
PID 2600 wrote to memory of 2292	2600	fhctkele.exe	43
PID 2600 wrote to memory of 2292	2600	fhctkele.exe	43
PID 2600 wrote to memory of 2292	2600	fhctkele.exe	43
PID 2600 wrote to memory of 2292	2600	fhctkele.exe	43

C:\Users\Admin\AppData\Local\Temp\2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zykxrebn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2816
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fhctkele.exe" C:\Windows\SysWOW64\zykxrebn\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2672
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zykxrebn binPath= "C:\Windows\SysWOW64\zykxrebn\fhctkele.exe /d\"C:\Users\Admin\AppData\Local\Temp\2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zykxrebn "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2296
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zykxrebn
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2684
- 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:2544

C:\Windows\SysWOW64\zykxrebn\fhctkele.exe
C:\Windows\SysWOW64\zykxrebn\fhctkele.exe /d"C:\Users\Admin\AppData\Local\Temp\2024-12-07_3a2ed34c3dc624d64a485f8634dde112_karagany_mafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2600
- 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:2292

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\fhctkele.exe

Filesize
12.4MB

MD5
863a877f15c5f054ca5b08954cec1e71

SHA1
bc956d3e4cecff22d94cf6eb7ad0ec60b254d9f7

SHA256
e93466fb3e3751ad70375e7a2567a86ce9d0214ce81f63db459428f05f200dde

SHA512
59fe46e05343efaedc3a80860c7b9429f7e1c026ae258d19471971e0094d9947e291af7a6108a5113667023960dc5e9d3e91fb3e60e4da74dd601f28682df3a1

Download Submit
memory/2092-7-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2092-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2092-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2092-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2092-8-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2092-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

Filesize
1024KB

Download
memory/2292-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2292-16-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2292-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2292-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2292-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2600-17-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads