tofsee | 475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c

General

Target

475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe
Size

120KB
MD5

bcd473e359b0dce9b3d838603f108ad9
SHA1

a7ff28a43ecbd3ac14d1c64a5cd15ad4824bfce6
SHA256

475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c
SHA512

7b12bab3aa8fb372fc46601bfc1e10fc3b025c5a8ff1f3ad2ca6e66d824c4a2caae681809000021320c952df9ec963f0105645fcd8bace5131c781ab8343d126

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\yqvsrtam = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

cwyvplva.exe

pid process

1380 cwyvplva.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1688 netsh.exe

pid	process
1380	cwyvplva.exe

pid	process
1688	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\yqvsrtam\ImagePath = "C:\\Windows\\SysWOW64\\yqvsrtam\\cwyvplva.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1456 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

cwyvplva.exe

description pid process target process

PID 1380 set thread context of 1456 1380 cwyvplva.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

1148 sc.exe
1072 sc.exe
1996 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
1456	svchost.exe

description	pid	process	target process
PID 1380 set thread context of 1456	1380	cwyvplva.exe	svchost.exe

pid	process
1148	sc.exe
1072	sc.exe
1996	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.execwyvplva.exe

description	pid	process	target process
PID 1468 wrote to memory of 1604	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	cmd.exe
PID 1468 wrote to memory of 1604	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	cmd.exe
PID 1468 wrote to memory of 1604	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	cmd.exe
PID 1468 wrote to memory of 1604	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	cmd.exe
PID 1468 wrote to memory of 628	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	cmd.exe
PID 1468 wrote to memory of 628	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	cmd.exe
PID 1468 wrote to memory of 628	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	cmd.exe
PID 1468 wrote to memory of 628	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	cmd.exe
PID 1468 wrote to memory of 1148	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1148	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1148	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1148	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1072	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1072	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1072	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1072	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1996	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1996	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1996	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1468 wrote to memory of 1996	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	sc.exe
PID 1380 wrote to memory of 1456	1380	cwyvplva.exe	svchost.exe
PID 1380 wrote to memory of 1456	1380	cwyvplva.exe	svchost.exe
PID 1380 wrote to memory of 1456	1380	cwyvplva.exe	svchost.exe
PID 1380 wrote to memory of 1456	1380	cwyvplva.exe	svchost.exe
PID 1380 wrote to memory of 1456	1380	cwyvplva.exe	svchost.exe
PID 1380 wrote to memory of 1456	1380	cwyvplva.exe	svchost.exe
PID 1468 wrote to memory of 1688	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	netsh.exe
PID 1468 wrote to memory of 1688	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	netsh.exe
PID 1468 wrote to memory of 1688	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	netsh.exe
PID 1468 wrote to memory of 1688	1468	475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe
"C:\Users\Admin\AppData\Local\Temp\475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1468

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yqvsrtam\
2⤵
PID:1604

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cwyvplva.exe" C:\Windows\SysWOW64\yqvsrtam\
2⤵
PID:628

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create yqvsrtam binPath= "C:\Windows\SysWOW64\yqvsrtam\cwyvplva.exe /d\"C:\Users\Admin\AppData\Local\Temp\475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1148

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description yqvsrtam "wifi internet conection"
2⤵
- Launches sc.exe
PID:1072

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start yqvsrtam
2⤵
- Launches sc.exe
PID:1996

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:1688

C:\Windows\SysWOW64\yqvsrtam\cwyvplva.exe
C:\Windows\SysWOW64\yqvsrtam\cwyvplva.exe /d"C:\Users\Admin\AppData\Local\Temp\475c6a7176eeac0d3495f43ee21dcdcd51474b04857ac6f2b08506096eafe85c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1380

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1456

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\cwyvplva.exe
Filesize
11.8MB

MD5
c8cf940b1245669b0c1c9abacc104d8b

SHA1
3aae0211e6be0d9d25c176c53600bf751cac2d8c

SHA256
2d10c4c117c999c9ec45f0006492563519c4dcc6586d680dd11a06a0b7a02d5a

SHA512
7fa334dcbafd294219152f54539f4717be8a0785b3973398f2cf06a496f498e8736ede5908bf1c5c2e0a92291a5c6b154eb0afb3cfa908edd7ff691fe003a6e1

Download Submit
C:\Windows\SysWOW64\yqvsrtam\cwyvplva.exe
Filesize
11.8MB

MD5
c8cf940b1245669b0c1c9abacc104d8b

SHA1
3aae0211e6be0d9d25c176c53600bf751cac2d8c

SHA256
2d10c4c117c999c9ec45f0006492563519c4dcc6586d680dd11a06a0b7a02d5a

SHA512
7fa334dcbafd294219152f54539f4717be8a0785b3973398f2cf06a496f498e8736ede5908bf1c5c2e0a92291a5c6b154eb0afb3cfa908edd7ff691fe003a6e1

Download Submit
memory/628-57-0x0000000000000000-mapping.dmp

Download
memory/1072-60-0x0000000000000000-mapping.dmp

Download
memory/1148-59-0x0000000000000000-mapping.dmp

Download
memory/1380-64-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1456-65-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1456-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1456-68-0x0000000000089A6B-mapping.dmp

Download
memory/1456-72-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1456-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1468-55-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1468-54-0x0000000075371000-0x0000000075373000-memory.dmp

Filesize
8KB

Download
memory/1604-56-0x0000000000000000-mapping.dmp

Download
memory/1688-73-0x0000000000000000-mapping.dmp

Download
memory/1996-61-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads