tofsee | 6ffd0a23f224b192b9528c6b13bf203638c74e45b6da2f269d82776a6ca83fc5

General

Target

e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe
Size

303KB
MD5

531df55984e2b66ad9f0dbd639de601e
SHA1

dc9d0df60d45c19e668e99a39946d1d39a5d9a09
SHA256

e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f
SHA512

1a2029171755e8c7f4f374af5544eef317a0d1635272991b7535f4406a99b4ef5d70985602fd85c8b9eb40de2215c81be496157821f78a013cea74ad2848e72b
SSDEEP

3072:MuFL7HO/Wc2L/rIUpqfM/FqdAt/XOM5TJDTnmhd+:xFL7HQ2LrI7fg2AtXJnmv+

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\hhnikqhx = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1464 netsh.exe

pid	process
1464	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\hhnikqhx\ImagePath = "C:\\Windows\\SysWOW64\\hhnikqhx\\pwzutnnh.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

240 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

pwzutnnh.exe

pid process

2012 pwzutnnh.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

pwzutnnh.exe

description pid process target process

PID 2012 set thread context of 240 2012 pwzutnnh.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1792 sc.exe
1748 sc.exe
1100 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
240	svchost.exe

pid	process
2012	pwzutnnh.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

description	pid	process	target process
PID 2012 set thread context of 240	2012	pwzutnnh.exe	svchost.exe

pid	process
1792	sc.exe
1748	sc.exe
1100	sc.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exepwzutnnh.exe

description	pid	process	target process
PID 1976 wrote to memory of 1940	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 1976 wrote to memory of 1940	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 1976 wrote to memory of 1940	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 1976 wrote to memory of 1940	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 1976 wrote to memory of 1788	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 1976 wrote to memory of 1788	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 1976 wrote to memory of 1788	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 1976 wrote to memory of 1788	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	cmd.exe
PID 1976 wrote to memory of 1792	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1792	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1792	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1792	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1748	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1748	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1748	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1748	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1100	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1100	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1100	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1100	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	sc.exe
PID 1976 wrote to memory of 1464	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	netsh.exe
PID 1976 wrote to memory of 1464	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	netsh.exe
PID 1976 wrote to memory of 1464	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	netsh.exe
PID 1976 wrote to memory of 1464	1976	e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe	netsh.exe
PID 2012 wrote to memory of 240	2012	pwzutnnh.exe	svchost.exe
PID 2012 wrote to memory of 240	2012	pwzutnnh.exe	svchost.exe
PID 2012 wrote to memory of 240	2012	pwzutnnh.exe	svchost.exe
PID 2012 wrote to memory of 240	2012	pwzutnnh.exe	svchost.exe
PID 2012 wrote to memory of 240	2012	pwzutnnh.exe	svchost.exe
PID 2012 wrote to memory of 240	2012	pwzutnnh.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe
"C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hhnikqhx\
  2⤵
  PID:1940
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pwzutnnh.exe" C:\Windows\SysWOW64\hhnikqhx\
  2⤵
  PID:1788
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hhnikqhx binPath= "C:\Windows\SysWOW64\hhnikqhx\pwzutnnh.exe /d\"C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1792
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hhnikqhx "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1748
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hhnikqhx
  2⤵
  - Launches sc.exe
  PID:1100
- 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
  PID:1464

C:\Windows\SysWOW64\hhnikqhx\pwzutnnh.exe
C:\Windows\SysWOW64\hhnikqhx\pwzutnnh.exe /d"C:\Users\Admin\AppData\Local\Temp\e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:240

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Disabling Security Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
12.8MB

MD5
81af429353ac3fe58ba8e3308194e132

SHA1
65a7a5bd461ebaef2793d9399b0eb594342ad558

SHA256
79819ea84e6ec6279da9d2aa7bb7c5a4b44d58d71261059c47c30fdb20dc9156

SHA512
db6a47f0188aa5b10cb208990e78525347254e12888854cecf2ac5d24957e09c3bb2ba898f4086466525c63fcad675401c2b32d287be1b5e91f8b5303ad7d706

Download Submit
C:\Windows\SysWOW64\hhnikqhx\pwzutnnh.exe

Filesize
12.8MB

MD5
81af429353ac3fe58ba8e3308194e132

SHA1
65a7a5bd461ebaef2793d9399b0eb594342ad558

SHA256
79819ea84e6ec6279da9d2aa7bb7c5a4b44d58d71261059c47c30fdb20dc9156

SHA512
db6a47f0188aa5b10cb208990e78525347254e12888854cecf2ac5d24957e09c3bb2ba898f4086466525c63fcad675401c2b32d287be1b5e91f8b5303ad7d706

Download Submit
memory/240-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/240-63-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/240-61-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/240-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/240-68-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/240-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/240-71-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1976-56-0x00000000002A0000-0x00000000002B3000-memory.dmp

Filesize
76KB

Download
memory/1976-60-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download
memory/2012-66-0x0000000000400000-0x0000000000A5C000-memory.dmp

Filesize
6.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads