tofsee | 1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195

General

Target

1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe
Size

143KB
MD5

aad43b23811400fcc73d8c22b4420660
SHA1

a9230effebe05616919532d05e2506ed503bd422
SHA256

1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195
SHA512

b928c25bf1e18f45ff91ce307f90186724d4c750702459b3da9672794245488adcc1280132bf342ae76a5c9b1a6cdb9220ce26ae675b0591fc0da38917a29005

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
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

bsslvtft.exe

pid process

1396 bsslvtft.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1208 netsh.exe

pid	process
1396	bsslvtft.exe

pid	process
1208	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\bdsiimjw\ImagePath = "C:\\Windows\\SysWOW64\\bdsiimjw\\bsslvtft.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1704 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

bsslvtft.exe

description pid process target process

PID 1396 set thread context of 1704 1396 bsslvtft.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

1060 sc.exe
1332 sc.exe
1780 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
1704	svchost.exe

description	pid	process	target process
PID 1396 set thread context of 1704	1396	bsslvtft.exe	svchost.exe

pid	process
1060	sc.exe
1332	sc.exe
1780	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exebsslvtft.exe

description	pid	process	target process
PID 1640 wrote to memory of 912	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 1640 wrote to memory of 912	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 1640 wrote to memory of 912	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 1640 wrote to memory of 912	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 1640 wrote to memory of 1692	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 1640 wrote to memory of 1692	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 1640 wrote to memory of 1692	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 1640 wrote to memory of 1692	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	cmd.exe
PID 1640 wrote to memory of 1060	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1060	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1060	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1060	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1332	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1332	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1332	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1332	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1780	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1780	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1780	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1780	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	sc.exe
PID 1640 wrote to memory of 1208	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	netsh.exe
PID 1640 wrote to memory of 1208	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	netsh.exe
PID 1640 wrote to memory of 1208	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	netsh.exe
PID 1640 wrote to memory of 1208	1640	1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe	netsh.exe
PID 1396 wrote to memory of 1704	1396	bsslvtft.exe	svchost.exe
PID 1396 wrote to memory of 1704	1396	bsslvtft.exe	svchost.exe
PID 1396 wrote to memory of 1704	1396	bsslvtft.exe	svchost.exe
PID 1396 wrote to memory of 1704	1396	bsslvtft.exe	svchost.exe
PID 1396 wrote to memory of 1704	1396	bsslvtft.exe	svchost.exe
PID 1396 wrote to memory of 1704	1396	bsslvtft.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe
"C:\Users\Admin\AppData\Local\Temp\1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1640

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bdsiimjw\
2⤵
PID:912

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bsslvtft.exe" C:\Windows\SysWOW64\bdsiimjw\
2⤵
PID:1692

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create bdsiimjw binPath= "C:\Windows\SysWOW64\bdsiimjw\bsslvtft.exe /d\"C:\Users\Admin\AppData\Local\Temp\1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1060

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description bdsiimjw "wifi internet conection"
2⤵
- Launches sc.exe
PID:1332

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start bdsiimjw
2⤵
- Launches sc.exe
PID:1780

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:1208

C:\Windows\SysWOW64\bdsiimjw\bsslvtft.exe
C:\Windows\SysWOW64\bdsiimjw\bsslvtft.exe /d"C:\Users\Admin\AppData\Local\Temp\1788c90e47e33020a545656cf59b5f557a93d90e449cd356d578309e71a5c195.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1396

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1704

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

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\bsslvtft.exe
Filesize
12.8MB

MD5
65c26f1474ad1bbcbf2b71700ccab33c

SHA1
08be4c4a4b931bac2eae6983c93bd11d1a122190

SHA256
f83977970e975c178d5e555d2da619aed416e6d65d6271d55857bdc8815928bf

SHA512
7faeb9823f00a4a8db612aa0b1ed9f38a4045b85457d6a5998cf7635a95fece271efc1be37b12a0b261a6e737ba41695f12ecd6fc329fef08b07ae0acc6894b4

Download Submit
C:\Windows\SysWOW64\bdsiimjw\bsslvtft.exe
Filesize
12.8MB

MD5
65c26f1474ad1bbcbf2b71700ccab33c

SHA1
08be4c4a4b931bac2eae6983c93bd11d1a122190

SHA256
f83977970e975c178d5e555d2da619aed416e6d65d6271d55857bdc8815928bf

SHA512
7faeb9823f00a4a8db612aa0b1ed9f38a4045b85457d6a5998cf7635a95fece271efc1be37b12a0b261a6e737ba41695f12ecd6fc329fef08b07ae0acc6894b4

Download Submit
memory/912-56-0x0000000000000000-mapping.dmp

Download
memory/1060-59-0x0000000000000000-mapping.dmp

Download
memory/1208-62-0x0000000000000000-mapping.dmp

Download
memory/1332-60-0x0000000000000000-mapping.dmp

Download
memory/1396-65-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1640-54-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1640-55-0x0000000075AE1000-0x0000000075AE3000-memory.dmp

Filesize
8KB

Download
memory/1692-57-0x0000000000000000-mapping.dmp

Download
memory/1704-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1704-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1704-70-0x0000000000089A6B-mapping.dmp

Download
memory/1704-73-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1704-74-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1704-75-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1780-61-0x0000000000000000-mapping.dmp

Download

Analysis

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