tofsee | 45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e

General

Target

45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe
Size

270KB
MD5

67abef7218b3cc16b6cb7177643c1886
SHA1

2026aac881ee7a6d32b30e1b0cc326bb618db878
SHA256

45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e
SHA512

18ab11ac2a12995515f5480b837d20fc9c1ce9103fe2aa2bc0c325f8d67c576483fe9a69ae9027d8a0db3a30f3dfed2f2a38175b63032ecbcc6e7cec1f72a136

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

ovicrush.cn

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

wvojcrlv.exe

pid process

4080 wvojcrlv.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112
Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2828 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

wvojcrlv.exe

description pid process target process

PID 4080 set thread context of 2828 4080 wvojcrlv.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
4080	wvojcrlv.exe

pid	process
2828	svchost.exe

description	pid	process	target process
PID 4080 set thread context of 2828	4080	wvojcrlv.exe	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exewvojcrlv.exe

description	pid	process	target process
PID 2224 wrote to memory of 3152	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	cmd.exe
PID 2224 wrote to memory of 3152	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	cmd.exe
PID 2224 wrote to memory of 3152	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	cmd.exe
PID 2224 wrote to memory of 3700	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	cmd.exe
PID 2224 wrote to memory of 3700	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	cmd.exe
PID 2224 wrote to memory of 3700	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	cmd.exe
PID 2224 wrote to memory of 648	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 648	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 648	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 2004	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 2004	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 2004	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 584	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 584	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 584	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	sc.exe
PID 2224 wrote to memory of 3952	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	netsh.exe
PID 2224 wrote to memory of 3952	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	netsh.exe
PID 2224 wrote to memory of 3952	2224	45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe	netsh.exe
PID 4080 wrote to memory of 2828	4080	wvojcrlv.exe	svchost.exe
PID 4080 wrote to memory of 2828	4080	wvojcrlv.exe	svchost.exe
PID 4080 wrote to memory of 2828	4080	wvojcrlv.exe	svchost.exe
PID 4080 wrote to memory of 2828	4080	wvojcrlv.exe	svchost.exe
PID 4080 wrote to memory of 2828	4080	wvojcrlv.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe
"C:\Users\Admin\AppData\Local\Temp\45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2224

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xbuygxuk\
2⤵
PID:3152

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wvojcrlv.exe" C:\Windows\SysWOW64\xbuygxuk\
2⤵
PID:3700

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xbuygxuk binPath= "C:\Windows\SysWOW64\xbuygxuk\wvojcrlv.exe /d\"C:\Users\Admin\AppData\Local\Temp\45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:648

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xbuygxuk "wifi internet conection"
2⤵
PID:2004

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xbuygxuk
2⤵
PID:584

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⤵
PID:3952

C:\Windows\SysWOW64\xbuygxuk\wvojcrlv.exe
C:\Windows\SysWOW64\xbuygxuk\wvojcrlv.exe /d"C:\Users\Admin\AppData\Local\Temp\45e247392ea8d6187fd469161a3cb3ec2c465deacdf624f9cfafda37d070f26e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4080

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
PID:2828

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\wvojcrlv.exe
MD5
fca2ad651b067af02bb368e569006230

SHA1
2f57d388906802dbcdf49abc865e213877d1c17a

SHA256
976ba4208d9d240e9634f68d553cba7ff88676c3940ec7cfa67bfc52b0251f67

SHA512
bcdee22b9b546253797ea31843e3847cf7f2201c187cc049768404889984b8105e1f06357f88a88aa7836208efb53e75bbf34a6e752a1903d078097e309f5db5

Download Submit
C:\Windows\SysWOW64\xbuygxuk\wvojcrlv.exe
MD5
fca2ad651b067af02bb368e569006230

SHA1
2f57d388906802dbcdf49abc865e213877d1c17a

SHA256
976ba4208d9d240e9634f68d553cba7ff88676c3940ec7cfa67bfc52b0251f67

SHA512
bcdee22b9b546253797ea31843e3847cf7f2201c187cc049768404889984b8105e1f06357f88a88aa7836208efb53e75bbf34a6e752a1903d078097e309f5db5

Download Submit
memory/2224-115-0x0000000000030000-0x000000000003D000-memory.dmp

Filesize
52KB

Download
memory/2224-116-0x0000000000450000-0x00000000004FE000-memory.dmp

Filesize
696KB

Download
memory/2224-117-0x0000000000400000-0x000000000044B000-memory.dmp

Filesize
300KB

Download
memory/2828-120-0x0000000000330000-0x0000000000345000-memory.dmp

Filesize
84KB

Download
memory/4080-124-0x0000000000490000-0x00000000004A3000-memory.dmp

Filesize
76KB

Download
memory/4080-125-0x0000000000400000-0x000000000044B000-memory.dmp

Filesize
300KB

Download
memory/4080-122-0x0000000000030000-0x000000000003D000-memory.dmp

Filesize
52KB

Download

Analysis

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