tofsee | babfd5dc2572543908aa2ee354a89806b1e5e77ae762ac17e639a4edb890f577

General

Target

file.exe
Size

300KB
MD5

1e5707d88142fc30dd5020efe01a2d40
SHA1

c44d8d95691d2a906166601058193e791e5c5d85
SHA256

babfd5dc2572543908aa2ee354a89806b1e5e77ae762ac17e639a4edb890f577
SHA512

9b4e8bee60324312abb1593822a5171f62af3afda5bba3f616ce822f2e2b3213ff39c43093c8a413942e0f188b94560c3fd8510e1854cd819ea3f6795f205c3c
SSDEEP

3072:C54b6bOxdLoJsRGR0Y9WTnXBeYFC36MdDS0SyQcbuQjiMTE5XcAMRtafj:CqFxdLWTi/1C3VS0SyQcbuQj9ra

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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\jchhnbjg = "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

1700 netsh.exe

pid	process
1700	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\jchhnbjg\ImagePath = "C:\\Windows\\SysWOW64\\jchhnbjg\\jczhyrli.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

828 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

jczhyrli.exe

pid process

672 jczhyrli.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:

jczhyrli.exe

description pid process target process

PID 672 set thread context of 828 672 jczhyrli.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

1664 sc.exe
1448 sc.exe
1784 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
828	svchost.exe

pid	process
672	jczhyrli.exe

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

description	pid	process	target process
PID 672 set thread context of 828	672	jczhyrli.exe	svchost.exe

pid	process
1664	sc.exe
1448	sc.exe
1784	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:

file.exejczhyrli.exe

description	pid	process	target process
PID 2040 wrote to memory of 992	2040	file.exe	cmd.exe
PID 2040 wrote to memory of 992	2040	file.exe	cmd.exe
PID 2040 wrote to memory of 992	2040	file.exe	cmd.exe
PID 2040 wrote to memory of 992	2040	file.exe	cmd.exe
PID 2040 wrote to memory of 1368	2040	file.exe	cmd.exe
PID 2040 wrote to memory of 1368	2040	file.exe	cmd.exe
PID 2040 wrote to memory of 1368	2040	file.exe	cmd.exe
PID 2040 wrote to memory of 1368	2040	file.exe	cmd.exe
PID 2040 wrote to memory of 1664	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1664	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1664	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1664	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1448	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1448	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1448	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1448	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1784	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1784	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1784	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1784	2040	file.exe	sc.exe
PID 2040 wrote to memory of 1700	2040	file.exe	netsh.exe
PID 2040 wrote to memory of 1700	2040	file.exe	netsh.exe
PID 2040 wrote to memory of 1700	2040	file.exe	netsh.exe
PID 2040 wrote to memory of 1700	2040	file.exe	netsh.exe
PID 672 wrote to memory of 828	672	jczhyrli.exe	svchost.exe
PID 672 wrote to memory of 828	672	jczhyrli.exe	svchost.exe
PID 672 wrote to memory of 828	672	jczhyrli.exe	svchost.exe
PID 672 wrote to memory of 828	672	jczhyrli.exe	svchost.exe
PID 672 wrote to memory of 828	672	jczhyrli.exe	svchost.exe
PID 672 wrote to memory of 828	672	jczhyrli.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2040

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jchhnbjg\
2⤵
PID:992

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jczhyrli.exe" C:\Windows\SysWOW64\jchhnbjg\
2⤵
PID:1368

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create jchhnbjg binPath= "C:\Windows\SysWOW64\jchhnbjg\jczhyrli.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1664

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description jchhnbjg "wifi internet conection"
2⤵
- Launches sc.exe
PID:1448

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start jchhnbjg
2⤵
- Launches sc.exe
PID:1784

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:1700

C:\Windows\SysWOW64\jchhnbjg\jczhyrli.exe
C:\Windows\SysWOW64\jchhnbjg\jczhyrli.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:672

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:828

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\jczhyrli.exe
Filesize
10.7MB

MD5
d99b7739c099879e1c1f947a8afc0c60

SHA1
65b5d06754761615507d7dedb3c022b1f1e8f991

SHA256
4fee0e2cdd2cb6f71a8c1b1ebae68fc12b626f4996aec787f3d30d506c48b0b6

SHA512
92bf4368a873a12ded4063e1a329c608f82c321ddba0ea77757039a16e6282be0d9ee1f01080310e45e2ef36ecc663275bc652ad76207c2d0c7e3544a5b1de27

Download Submit
C:\Windows\SysWOW64\jchhnbjg\jczhyrli.exe
Filesize
10.7MB

MD5
d99b7739c099879e1c1f947a8afc0c60

SHA1
65b5d06754761615507d7dedb3c022b1f1e8f991

SHA256
4fee0e2cdd2cb6f71a8c1b1ebae68fc12b626f4996aec787f3d30d506c48b0b6

SHA512
92bf4368a873a12ded4063e1a329c608f82c321ddba0ea77757039a16e6282be0d9ee1f01080310e45e2ef36ecc663275bc652ad76207c2d0c7e3544a5b1de27

Download Submit
memory/672-76-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/672-75-0x000000000026C000-0x0000000000281000-memory.dmp

Filesize
84KB

Download
memory/828-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/828-70-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/828-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/828-79-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/828-73-0x0000000000089A6B-mapping.dmp

Download
memory/992-55-0x0000000000000000-mapping.dmp

Download
memory/1368-59-0x0000000000000000-mapping.dmp

Download
memory/1448-62-0x0000000000000000-mapping.dmp

Download
memory/1664-61-0x0000000000000000-mapping.dmp

Download
memory/1700-65-0x0000000000000000-mapping.dmp

Download
memory/1784-63-0x0000000000000000-mapping.dmp

Download
memory/2040-54-0x0000000076041000-0x0000000076043000-memory.dmp

Filesize
8KB

Download
memory/2040-67-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download
memory/2040-57-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2040-66-0x00000000005BC000-0x00000000005D1000-memory.dmp

Filesize
84KB

Download
memory/2040-56-0x00000000005BC000-0x00000000005D1000-memory.dmp

Filesize
84KB

Download
memory/2040-58-0x0000000000400000-0x00000000004C8000-memory.dmp

Filesize
800KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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