tofsee | d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa

General

Target

d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe
Size

299KB
MD5

572b56cf081eb05fd5e149c5c42d1750
SHA1

a7400abf0762a08475b418a042b0d67155bda028
SHA256

d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa
SHA512

7d4d5bad69990ede43f1137ceec73e74fdcde90a1e253bf81773cee5f821dae25db4e8b005335ed961a6149fc690e4c75b7b677526fb398fe217882fa0bc6954

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\gmbfytvy = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

uwriztat.exe

pid process

1036 uwriztat.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

520 netsh.exe

pid	process
1036	uwriztat.exe

pid	process
520	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\gmbfytvy\ImagePath = "C:\\Windows\\SysWOW64\\gmbfytvy\\uwriztat.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1476 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

uwriztat.exe

description pid process target process

PID 1036 set thread context of 1476 1036 uwriztat.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

676 sc.exe
612 sc.exe
1104 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
1476	svchost.exe

description	pid	process	target process
PID 1036 set thread context of 1476	1036	uwriztat.exe	svchost.exe

pid	process
676	sc.exe
612	sc.exe
1104	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exeuwriztat.exe

description	pid	process	target process
PID 1984 wrote to memory of 1884	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	cmd.exe
PID 1984 wrote to memory of 1884	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	cmd.exe
PID 1984 wrote to memory of 1884	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	cmd.exe
PID 1984 wrote to memory of 1884	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	cmd.exe
PID 1984 wrote to memory of 1484	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	cmd.exe
PID 1984 wrote to memory of 1484	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	cmd.exe
PID 1984 wrote to memory of 1484	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	cmd.exe
PID 1984 wrote to memory of 1484	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	cmd.exe
PID 1984 wrote to memory of 612	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 612	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 612	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 612	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 1104	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 1104	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 1104	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 1104	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 676	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 676	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 676	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 676	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	sc.exe
PID 1984 wrote to memory of 520	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	netsh.exe
PID 1984 wrote to memory of 520	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	netsh.exe
PID 1984 wrote to memory of 520	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	netsh.exe
PID 1984 wrote to memory of 520	1984	d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe	netsh.exe
PID 1036 wrote to memory of 1476	1036	uwriztat.exe	svchost.exe
PID 1036 wrote to memory of 1476	1036	uwriztat.exe	svchost.exe
PID 1036 wrote to memory of 1476	1036	uwriztat.exe	svchost.exe
PID 1036 wrote to memory of 1476	1036	uwriztat.exe	svchost.exe
PID 1036 wrote to memory of 1476	1036	uwriztat.exe	svchost.exe
PID 1036 wrote to memory of 1476	1036	uwriztat.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe
"C:\Users\Admin\AppData\Local\Temp\d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gmbfytvy\
2⤵
PID:1884

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uwriztat.exe" C:\Windows\SysWOW64\gmbfytvy\
2⤵
PID:1484

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create gmbfytvy binPath= "C:\Windows\SysWOW64\gmbfytvy\uwriztat.exe /d\"C:\Users\Admin\AppData\Local\Temp\d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:612

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description gmbfytvy "wifi internet conection"
2⤵
- Launches sc.exe
PID:1104

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start gmbfytvy
2⤵
- Launches sc.exe
PID:676

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:520

C:\Windows\SysWOW64\gmbfytvy\uwriztat.exe
C:\Windows\SysWOW64\gmbfytvy\uwriztat.exe /d"C:\Users\Admin\AppData\Local\Temp\d99fdafe7f0e720d1ee19abe7a5af10f98f486407cbc23825bd0f6f19b7664fa.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1036

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1476

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\uwriztat.exe
Filesize
12.4MB

MD5
22fb19be0c8d0046584b5a7efc359ba8

SHA1
7f7bc45d4ea93781b4f3e32a3dd8572d859cdd20

SHA256
c7d9fee78f742cb68416b158201f3be5c50ff6eae021d4187fdf471e23c44731

SHA512
e1b4972be824d5c520b1fb51779aab4a8308f8f7708837c4ee4e731421c2de30d539a4f62b05d70c80935aa89ff703f30747730417f93840b02cb58f9aa4e022

Download Submit
C:\Windows\SysWOW64\gmbfytvy\uwriztat.exe
Filesize
12.4MB

MD5
22fb19be0c8d0046584b5a7efc359ba8

SHA1
7f7bc45d4ea93781b4f3e32a3dd8572d859cdd20

SHA256
c7d9fee78f742cb68416b158201f3be5c50ff6eae021d4187fdf471e23c44731

SHA512
e1b4972be824d5c520b1fb51779aab4a8308f8f7708837c4ee4e731421c2de30d539a4f62b05d70c80935aa89ff703f30747730417f93840b02cb58f9aa4e022

Download Submit
memory/520-65-0x0000000000000000-mapping.dmp

Download
memory/612-62-0x0000000000000000-mapping.dmp

Download
memory/676-64-0x0000000000000000-mapping.dmp

Download
memory/1036-69-0x0000000000E5E000-0x0000000000E6D000-memory.dmp

Filesize
60KB

Download
memory/1036-68-0x0000000000400000-0x0000000000C52000-memory.dmp

Filesize
8.3MB

Download
memory/1036-77-0x0000000000E5E000-0x0000000000E6D000-memory.dmp

Filesize
60KB

Download
memory/1036-76-0x0000000000400000-0x0000000000C52000-memory.dmp

Filesize
8.3MB

Download
memory/1104-63-0x0000000000000000-mapping.dmp

Download
memory/1476-74-0x0000000000089A6B-mapping.dmp

Download
memory/1476-71-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1476-73-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1476-80-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1476-82-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1484-60-0x0000000000000000-mapping.dmp

Download
memory/1884-59-0x0000000000000000-mapping.dmp

Download
memory/1984-56-0x0000000076601000-0x0000000076603000-memory.dmp

Filesize
8KB

Download
memory/1984-66-0x0000000000400000-0x0000000000C52000-memory.dmp

Filesize
8.3MB

Download
memory/1984-55-0x0000000000DDE000-0x0000000000DED000-memory.dmp

Filesize
60KB

Download
memory/1984-57-0x0000000000DDE000-0x0000000000DED000-memory.dmp

Filesize
60KB

Download
memory/1984-54-0x0000000000400000-0x0000000000C52000-memory.dmp

Filesize
8.3MB

Download
memory/1984-58-0x0000000000400000-0x0000000000C52000-memory.dmp

Filesize
8.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads