tofsee | a5462ebc51b4e3cee8e57ff06c11fae6a86029c95a8975fc5d4b8efc8f1f39dd

Analysis

max time kernel
147s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-09-2024 18:28

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General

Target

c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe
Size

213KB
MD5

8e456f932787fcd0cadbb598174575b2
SHA1

22b069c76b86bdb6be8cdafc78019b55c583062e
SHA256

c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5
SHA512

cb26a33dacdcfe804bdd587ecd44b9bf1c59f357e8701fc4f5e1b04d8d8882466c7743fac51969fe8912e1197a5653986eb4a71edc35eee89051b6c98d546c9d
SSDEEP

6144:MGDLD6Tj3Vyg0mwiRjaVlodEFjvn/Mq0Vdh1HQ:M+L2n3VygtzRWJjv+Vdz

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

vanaheim.cn

jotunheim.name

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

Processes:

svchost.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\qnyzwoeg = "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
2640	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\qnyzwoeg\ImagePath = "C:\\Windows\\SysWOW64\\qnyzwoeg\\pjjbeose.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
2740	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

pjjbeose.exe

pid	Process
2760	pjjbeose.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

pjjbeose.exe

description	pid	Process	procid_target
PID 2760 set thread context of 2740	2760	pjjbeose.exe	42

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
2696	sc.exe
2736	sc.exe
2900	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.exesc.exesc.exesc.exepjjbeose.exenetsh.exec55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.execmd.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pjjbeose.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exepjjbeose.exe

description	pid	Process	procid_target
PID 2332 wrote to memory of 2148	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	31
PID 2332 wrote to memory of 2148	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	31
PID 2332 wrote to memory of 2148	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	31
PID 2332 wrote to memory of 2148	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	31
PID 2332 wrote to memory of 1552	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	33
PID 2332 wrote to memory of 1552	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	33
PID 2332 wrote to memory of 1552	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	33
PID 2332 wrote to memory of 1552	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	33
PID 2332 wrote to memory of 2696	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	35
PID 2332 wrote to memory of 2696	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	35
PID 2332 wrote to memory of 2696	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	35
PID 2332 wrote to memory of 2696	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	35
PID 2332 wrote to memory of 2736	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	37
PID 2332 wrote to memory of 2736	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	37
PID 2332 wrote to memory of 2736	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	37
PID 2332 wrote to memory of 2736	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	37
PID 2332 wrote to memory of 2900	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	39
PID 2332 wrote to memory of 2900	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	39
PID 2332 wrote to memory of 2900	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	39
PID 2332 wrote to memory of 2900	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	39
PID 2760 wrote to memory of 2740	2760	pjjbeose.exe	42
PID 2760 wrote to memory of 2740	2760	pjjbeose.exe	42
PID 2760 wrote to memory of 2740	2760	pjjbeose.exe	42
PID 2760 wrote to memory of 2740	2760	pjjbeose.exe	42
PID 2760 wrote to memory of 2740	2760	pjjbeose.exe	42
PID 2760 wrote to memory of 2740	2760	pjjbeose.exe	42
PID 2332 wrote to memory of 2640	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	43
PID 2332 wrote to memory of 2640	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	43
PID 2332 wrote to memory of 2640	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	43
PID 2332 wrote to memory of 2640	2332	c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe	43

C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe
"C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qnyzwoeg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pjjbeose.exe" C:\Windows\SysWOW64\qnyzwoeg\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1552
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qnyzwoeg binPath= "C:\Windows\SysWOW64\qnyzwoeg\pjjbeose.exe /d\"C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2696
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qnyzwoeg "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qnyzwoeg
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2900
- 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:2640

C:\Windows\SysWOW64\qnyzwoeg\pjjbeose.exe
C:\Windows\SysWOW64\qnyzwoeg\pjjbeose.exe /d"C:\Users\Admin\AppData\Local\Temp\c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2760
- 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:2740

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\pjjbeose.exe

Filesize
13.0MB

MD5
bf171befd3d38f695002d35c89c3f3ca

SHA1
6454a7168c5935ae0a59324848f98c049635478f

SHA256
c107f03b486531797242ff5faf23832f7b145e2a525bffe6fcb5c319ece52363

SHA512
d93fa62bf13b6fecf3e1285902b45c37728fccfee29993cd4e9a0fa68011bc0765646e35c5e94fd2453ed61405e7fbf11d93e5464fbe6a96448221e747157bed

Download Submit
memory/2332-15-0x00000000003C0000-0x00000000003D3000-memory.dmp

Filesize
76KB

Download
memory/2332-4-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2332-2-0x00000000003C0000-0x00000000003D3000-memory.dmp

Filesize
76KB

Download
memory/2332-14-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2332-1-0x0000000000250000-0x0000000000350000-memory.dmp

Filesize
1024KB

Download
memory/2332-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2740-11-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2740-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2740-8-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2740-17-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2740-18-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2760-12-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download