tofsee | 568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51

General

Target

568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe
Size

142KB
MD5

048725634c77ed7223cd9b91d90b172b
SHA1

40628d5ffe1bbd7915a628938a8acac0d9c77ba3
SHA256

568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51
SHA512

ad87648a4003832c7ec6129b2745c119c693f99628295cb318d285b8c5ca23d8ec0a4682fdbe3e8a880de0f6e9b84ed78ae3279c457477d5d6a2b27f1284446c

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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

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\ykswszp = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

vrnzodki.exe

pid process

268 vrnzodki.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1728 netsh.exe

pid	process
268	vrnzodki.exe

pid	process
1728	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\ykswszp\ImagePath = "C:\\Windows\\SysWOW64\\ykswszp\\vrnzodki.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

848 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

vrnzodki.exe

description pid process target process

PID 268 set thread context of 848 268 vrnzodki.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

1248 sc.exe
1892 sc.exe
936 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
848	svchost.exe

description	pid	process	target process
PID 268 set thread context of 848	268	vrnzodki.exe	svchost.exe

pid	process
1248	sc.exe
1892	sc.exe
936	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exevrnzodki.exe

description	pid	process	target process
PID 1812 wrote to memory of 1416	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	cmd.exe
PID 1812 wrote to memory of 1416	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	cmd.exe
PID 1812 wrote to memory of 1416	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	cmd.exe
PID 1812 wrote to memory of 1416	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	cmd.exe
PID 1812 wrote to memory of 868	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	cmd.exe
PID 1812 wrote to memory of 868	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	cmd.exe
PID 1812 wrote to memory of 868	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	cmd.exe
PID 1812 wrote to memory of 868	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	cmd.exe
PID 1812 wrote to memory of 1892	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 1892	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 1892	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 1892	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 936	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 936	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 936	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 936	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 1248	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 1248	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 1248	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 1248	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	sc.exe
PID 1812 wrote to memory of 1728	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	netsh.exe
PID 1812 wrote to memory of 1728	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	netsh.exe
PID 1812 wrote to memory of 1728	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	netsh.exe
PID 1812 wrote to memory of 1728	1812	568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe	netsh.exe
PID 268 wrote to memory of 848	268	vrnzodki.exe	svchost.exe
PID 268 wrote to memory of 848	268	vrnzodki.exe	svchost.exe
PID 268 wrote to memory of 848	268	vrnzodki.exe	svchost.exe
PID 268 wrote to memory of 848	268	vrnzodki.exe	svchost.exe
PID 268 wrote to memory of 848	268	vrnzodki.exe	svchost.exe
PID 268 wrote to memory of 848	268	vrnzodki.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe
"C:\Users\Admin\AppData\Local\Temp\568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1812

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ykswszp\
2⤵
PID:1416

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vrnzodki.exe" C:\Windows\SysWOW64\ykswszp\
2⤵
PID:868

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create ykswszp binPath= "C:\Windows\SysWOW64\ykswszp\vrnzodki.exe /d\"C:\Users\Admin\AppData\Local\Temp\568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1892

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description ykswszp "wifi internet conection"
2⤵
- Launches sc.exe
PID:936

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start ykswszp
2⤵
- Launches sc.exe
PID:1248

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:1728

C:\Windows\SysWOW64\ykswszp\vrnzodki.exe
C:\Windows\SysWOW64\ykswszp\vrnzodki.exe /d"C:\Users\Admin\AppData\Local\Temp\568bdd6fb9671d0f9cd3d2843d20aca0cae45ec57fff154b0b0c439af8f00b51.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:268

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:848

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\vrnzodki.exe
Filesize
11.7MB

MD5
0ca9d91064f4572b23aeb25ccbc41366

SHA1
a64952847753a58996350262b57e6bd5c66cb9d2

SHA256
b45adbd95fdcca3135364ad921cd49e4ef77d2080551ecda0de7aaefbd0a1992

SHA512
f174cbfd2329d3e9d2d9b2a81f03c798956394c28d3dda3c93048875940c4156d066bdefbc3cdac51a37b4257e766244bb52d909a9ff3f9f7e688a7e159c8d89

Download Submit
C:\Windows\SysWOW64\ykswszp\vrnzodki.exe
Filesize
11.7MB

MD5
0ca9d91064f4572b23aeb25ccbc41366

SHA1
a64952847753a58996350262b57e6bd5c66cb9d2

SHA256
b45adbd95fdcca3135364ad921cd49e4ef77d2080551ecda0de7aaefbd0a1992

SHA512
f174cbfd2329d3e9d2d9b2a81f03c798956394c28d3dda3c93048875940c4156d066bdefbc3cdac51a37b4257e766244bb52d909a9ff3f9f7e688a7e159c8d89

Download Submit
memory/268-65-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/848-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/848-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/848-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/848-70-0x0000000000089A6B-mapping.dmp

Download
memory/848-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/868-57-0x0000000000000000-mapping.dmp

Download
memory/936-60-0x0000000000000000-mapping.dmp

Download
memory/1248-61-0x0000000000000000-mapping.dmp

Download
memory/1416-56-0x0000000000000000-mapping.dmp

Download
memory/1728-63-0x0000000000000000-mapping.dmp

Download
memory/1812-54-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1812-55-0x0000000076191000-0x0000000076193000-memory.dmp

Filesize
8KB

Download
memory/1892-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads