tofsee | befeb13d03669a0f610ba500df017d7b1c2155d86cc7e985feb439a867851fe0

Analysis

max time kernel
144s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
30/08/2024, 23:46

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General

Target
ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
Size 14.3MB
Sample240830-3smybatdnm
SHA256 ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411
MD5 2d357e20218ecce7a188d34e2163ac1c
SHA1 1a5bf816db5c146b3b685fdb28c3761608fdfef4
SHA512 59d6d72c15003acd59936ad400a1d1d465c1d109e9c7360f14603c709679e1fddabfae87252fbb0829fad05fa668deca594715d4775bb2fa9b04af776a7fb182
SSDEEP 6144:uM0Em6Qk5N3Sccccccccccccccccccccccccccccccccccccccccccccccccccc8:oEma
MD5 SHA1 SHA512 SSDEEP

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

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\nrrtxfsc = "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
588	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\nrrtxfsc\ImagePath = "C:\\Windows\\SysWOW64\\nrrtxfsc\\kmhypjqj.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2312	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2220	kmhypjqj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2220 set thread context of 2312	2220	kmhypjqj.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2976	sc.exe
2608	sc.exe
2672	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kmhypjqj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2928 wrote to memory of 2844	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	30
PID 2928 wrote to memory of 2844	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	30
PID 2928 wrote to memory of 2844	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	30
PID 2928 wrote to memory of 2844	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	30
PID 2928 wrote to memory of 3016	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	32
PID 2928 wrote to memory of 3016	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	32
PID 2928 wrote to memory of 3016	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	32
PID 2928 wrote to memory of 3016	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	32
PID 2928 wrote to memory of 2976	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	34
PID 2928 wrote to memory of 2976	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	34
PID 2928 wrote to memory of 2976	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	34
PID 2928 wrote to memory of 2976	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	34
PID 2928 wrote to memory of 2608	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	36
PID 2928 wrote to memory of 2608	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	36
PID 2928 wrote to memory of 2608	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	36
PID 2928 wrote to memory of 2608	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	36
PID 2928 wrote to memory of 2672	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	38
PID 2928 wrote to memory of 2672	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	38
PID 2928 wrote to memory of 2672	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	38
PID 2928 wrote to memory of 2672	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	38
PID 2220 wrote to memory of 2312	2220	kmhypjqj.exe	41
PID 2220 wrote to memory of 2312	2220	kmhypjqj.exe	41
PID 2220 wrote to memory of 2312	2220	kmhypjqj.exe	41
PID 2220 wrote to memory of 2312	2220	kmhypjqj.exe	41
PID 2220 wrote to memory of 2312	2220	kmhypjqj.exe	41
PID 2220 wrote to memory of 2312	2220	kmhypjqj.exe	41
PID 2928 wrote to memory of 588	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	42
PID 2928 wrote to memory of 588	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	42
PID 2928 wrote to memory of 588	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	42
PID 2928 wrote to memory of 588	2928	ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe	42

C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe
"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2928
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nrrtxfsc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kmhypjqj.exe" C:\Windows\SysWOW64\nrrtxfsc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3016
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nrrtxfsc binPath= "C:\Windows\SysWOW64\nrrtxfsc\kmhypjqj.exe /d\"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2976
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nrrtxfsc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nrrtxfsc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2672
- 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:588

C:\Windows\SysWOW64\nrrtxfsc\kmhypjqj.exe
C:\Windows\SysWOW64\nrrtxfsc\kmhypjqj.exe /d"C:\Users\Admin\AppData\Local\Temp\ed38d0a2443e4c2ea2ccb9c381f06aa11380c1c51117ef3eb9f327e9bca88411.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2220
- 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:2312

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

kmhypjqj.exe

Path C:\Users\Admin\AppData\Local\Temp\kmhypjqj.exe
Size 14.7MB
SHA256 3abd9677f0376166310f1773cdacb69ba65b6e389659447aac2661676f45569e
MD5 299f8c5a27d001413e431e0a6bc57193
SHA1 d6b90ee4930e983ab980de73d7b982bd6cbef7db
SHA512 c8b6712ef812bb981d97ade4e11e49ccf60276331d3567c1a3ee6a39eb59197ced6013cd8e205398c0e2c881e8aeb89907fc50b3702815e98104de509a5d98d2
SSDEEP 6144:sM0Em6Qk5N3Sccccccccccccccccccccccccccccccccccccccccccccccccccc8:CEma
MD5 SHA1 SHA512 SSDEEP

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memory/2220-12-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2312-7-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2312-10-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2312-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2312-14-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2312-15-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2928-0-0x00000000002D0000-0x00000000002D1000-memory.dmp

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memory/2928-1-0x00000000002E0000-0x00000000002E1000-memory.dmp

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memory/2928-2-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2928-13-0x0000000000400000-0x000000000041F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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