tofsee | 2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59

General

Target

2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe
Size

142KB
MD5

5e40852b1b836ae50ea61b4dc56124e9
SHA1

b01babd89da56da58ae26ea756bfe6dbdbc917d5
SHA256

2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59
SHA512

7e57324bafde20171129bd0a873654cece5827e93a00423bf98a89612343cd483fd67556dedaa72c5ae92f2a603c9dfab880881d986722d1403c508b523bc276

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:

aibrwtlv.exe

pid process

1052 aibrwtlv.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1464 netsh.exe

pid	process
1052	aibrwtlv.exe

pid	process
1464	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\mtstupzc\ImagePath = "C:\\Windows\\SysWOW64\\mtstupzc\\aibrwtlv.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1188 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

aibrwtlv.exe

description pid process target process

PID 1052 set thread context of 1188 1052 aibrwtlv.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

1996 sc.exe
1312 sc.exe
812 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
1188	svchost.exe

description	pid	process	target process
PID 1052 set thread context of 1188	1052	aibrwtlv.exe	svchost.exe

pid	process
1996	sc.exe
1312	sc.exe
812	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exeaibrwtlv.exe

description	pid	process	target process
PID 1648 wrote to memory of 2044	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	cmd.exe
PID 1648 wrote to memory of 2044	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	cmd.exe
PID 1648 wrote to memory of 2044	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	cmd.exe
PID 1648 wrote to memory of 2044	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	cmd.exe
PID 1648 wrote to memory of 2012	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	cmd.exe
PID 1648 wrote to memory of 2012	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	cmd.exe
PID 1648 wrote to memory of 2012	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	cmd.exe
PID 1648 wrote to memory of 2012	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	cmd.exe
PID 1648 wrote to memory of 1996	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 1996	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 1996	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 1996	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 1312	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 1312	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 1312	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 1312	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 812	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 812	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 812	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 812	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	sc.exe
PID 1648 wrote to memory of 1464	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	netsh.exe
PID 1648 wrote to memory of 1464	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	netsh.exe
PID 1648 wrote to memory of 1464	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	netsh.exe
PID 1648 wrote to memory of 1464	1648	2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe	netsh.exe
PID 1052 wrote to memory of 1188	1052	aibrwtlv.exe	svchost.exe
PID 1052 wrote to memory of 1188	1052	aibrwtlv.exe	svchost.exe
PID 1052 wrote to memory of 1188	1052	aibrwtlv.exe	svchost.exe
PID 1052 wrote to memory of 1188	1052	aibrwtlv.exe	svchost.exe
PID 1052 wrote to memory of 1188	1052	aibrwtlv.exe	svchost.exe
PID 1052 wrote to memory of 1188	1052	aibrwtlv.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe
"C:\Users\Admin\AppData\Local\Temp\2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1648

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mtstupzc\
2⤵
PID:2044

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\aibrwtlv.exe" C:\Windows\SysWOW64\mtstupzc\
2⤵
PID:2012

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create mtstupzc binPath= "C:\Windows\SysWOW64\mtstupzc\aibrwtlv.exe /d\"C:\Users\Admin\AppData\Local\Temp\2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1996

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description mtstupzc "wifi internet conection"
2⤵
- Launches sc.exe
PID:1312

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start mtstupzc
2⤵
- Launches sc.exe
PID:812

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:1464

C:\Windows\SysWOW64\mtstupzc\aibrwtlv.exe
C:\Windows\SysWOW64\mtstupzc\aibrwtlv.exe /d"C:\Users\Admin\AppData\Local\Temp\2ea3f9f2f531dc5153dd2e93f7cc763ce3e425c67eb64dcd06f5204598649b59.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1052

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1188

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\aibrwtlv.exe
Filesize
12.8MB

MD5
f15cea646962e9e530985ab2f634d9ec

SHA1
ea61686227e7e3c11952cbacf8335b88cd0a9706

SHA256
e3ff3fce5fe18c6e874e5c1c2c05c23d2ee92da46b5429b977e7b7de0fd88401

SHA512
534d26001b48294ad1fe357c92c6f87edb9b834db526d35da65dc29c848dfea90787e94ef63fb7b4414a3d485a3523898d85a8e437daf87ebdb61649bf369bdc

Download Submit
C:\Windows\SysWOW64\mtstupzc\aibrwtlv.exe
Filesize
12.8MB

MD5
f15cea646962e9e530985ab2f634d9ec

SHA1
ea61686227e7e3c11952cbacf8335b88cd0a9706

SHA256
e3ff3fce5fe18c6e874e5c1c2c05c23d2ee92da46b5429b977e7b7de0fd88401

SHA512
534d26001b48294ad1fe357c92c6f87edb9b834db526d35da65dc29c848dfea90787e94ef63fb7b4414a3d485a3523898d85a8e437daf87ebdb61649bf369bdc

Download Submit
memory/812-61-0x0000000000000000-mapping.dmp

Download
memory/1052-65-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1188-69-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/1188-67-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/1188-70-0x0000000000109A6B-mapping.dmp

Download
memory/1188-73-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/1188-74-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/1188-75-0x0000000000100000-0x0000000000115000-memory.dmp

Filesize
84KB

Download
memory/1312-60-0x0000000000000000-mapping.dmp

Download
memory/1464-62-0x0000000000000000-mapping.dmp

Download
memory/1648-55-0x00000000755B1000-0x00000000755B3000-memory.dmp

Filesize
8KB

Download
memory/1648-54-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1996-59-0x0000000000000000-mapping.dmp

Download
memory/2012-57-0x0000000000000000-mapping.dmp

Download
memory/2044-56-0x0000000000000000-mapping.dmp

Download

Analysis

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