tofsee | 82b3608606028f7e9bf7f15045c275a5d839652151123c42c2d5ca152844425b

Analysis

max time kernel
146s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29/12/2024, 22:15

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General

Target

0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe
Size

13.0MB
MD5

d4fbad00810efbb5dbd8a2452fe04ec3
SHA1

65884289994c879fdf192a5e6662a04d1a2f649e
SHA256

0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea
SHA512

b38b6d38106d8cb16dc5967ddd3be58bb5a4475867f1271896f1dbfc516d68b3f5de992a47ef31149ef264d889a1be8990ae26619ec6cc6c2b3a550bf69e7dd8
SSDEEP

24576:cqkEnA6V///////////////////////////////////////////////////////3:cqC

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

niflheimr.cn

jotunheim.name

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\reerejkj = "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
2908	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\reerejkj\ImagePath = "C:\\Windows\\SysWOW64\\reerejkj\\eygedrn.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2568	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2804	eygedrn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2804 set thread context of 2568	2804	eygedrn.exe	44

Launches sc.exe 3 IoCs

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

pid	Process
2856	sc.exe
1292	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	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.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	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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eygedrn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2944 wrote to memory of 2500	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	31
PID 2944 wrote to memory of 2500	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	31
PID 2944 wrote to memory of 2500	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	31
PID 2944 wrote to memory of 2500	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	31
PID 2944 wrote to memory of 1924	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	33
PID 2944 wrote to memory of 1924	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	33
PID 2944 wrote to memory of 1924	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	33
PID 2944 wrote to memory of 1924	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	33
PID 2944 wrote to memory of 2856	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	35
PID 2944 wrote to memory of 2856	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	35
PID 2944 wrote to memory of 2856	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	35
PID 2944 wrote to memory of 2856	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	35
PID 2944 wrote to memory of 1292	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	37
PID 2944 wrote to memory of 1292	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	37
PID 2944 wrote to memory of 1292	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	37
PID 2944 wrote to memory of 1292	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	37
PID 2944 wrote to memory of 2684	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	39
PID 2944 wrote to memory of 2684	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	39
PID 2944 wrote to memory of 2684	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	39
PID 2944 wrote to memory of 2684	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	39
PID 2944 wrote to memory of 2908	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	42
PID 2944 wrote to memory of 2908	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	42
PID 2944 wrote to memory of 2908	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	42
PID 2944 wrote to memory of 2908	2944	0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe	42
PID 2804 wrote to memory of 2568	2804	eygedrn.exe	44
PID 2804 wrote to memory of 2568	2804	eygedrn.exe	44
PID 2804 wrote to memory of 2568	2804	eygedrn.exe	44
PID 2804 wrote to memory of 2568	2804	eygedrn.exe	44
PID 2804 wrote to memory of 2568	2804	eygedrn.exe	44
PID 2804 wrote to memory of 2568	2804	eygedrn.exe	44

C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe
"C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2944
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\reerejkj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2500
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eygedrn.exe" C:\Windows\SysWOW64\reerejkj\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1924
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create reerejkj binPath= "C:\Windows\SysWOW64\reerejkj\eygedrn.exe /d\"C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.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 reerejkj "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1292
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start reerejkj
  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:2908

C:\Windows\SysWOW64\reerejkj\eygedrn.exe
C:\Windows\SysWOW64\reerejkj\eygedrn.exe /d"C:\Users\Admin\AppData\Local\Temp\0c562a5c681740b9496f31015d6ec74b9daf4ca21ce5dbde6788c866fb0d6aea.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2804
- 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:2568

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\eygedrn.exe

Filesize
11.4MB

MD5
8b95abb5f9bfdf12a7a2062db554861a

SHA1
e85bd489332b974e0acaca1738b45fb8d8ae0afb

SHA256
33488f1d8b40f926999c7dfe42a7e4992d55aff7bca5f29e189ca3099236a209

SHA512
94e94e248e8ef6aa6c39f73e5a9bb355100679870a6c69a52f132eaf377142ade0b70f752aa024a0d47cbd97725b58b31ca4764d74d178d33fed862018dd2ffd

Download Submit
memory/2568-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2568-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2568-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2568-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2568-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2804-15-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download
memory/2944-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2944-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2944-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2944-8-0x00000000001B0000-0x00000000001C3000-memory.dmp

Filesize
76KB

Download
memory/2944-7-0x0000000000400000-0x0000000000447000-memory.dmp

Filesize
284KB

Download
memory/2944-1-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads