tofsee | a6f0edcc4248c96cf33015626c80868eb1c9ed47198317c7add48ce23638c83f

General

Target

a2dac4450c8268e2c3ab41b28da9f6de.exe
Size

13.3MB
MD5

a2dac4450c8268e2c3ab41b28da9f6de
SHA1

4c112829564be4fd7208b5388b641a8ab68eefb7
SHA256

a6f0edcc4248c96cf33015626c80868eb1c9ed47198317c7add48ce23638c83f
SHA512

bc58ad5a68d7f3238bc59d775b28fc195859f3b42f20cf12dc8748d7f2e4e5d25d7080cc260990262f5d5760ecf51be5d9330c5a4bea7e886c33959bb6c33f82
SSDEEP

196608:5V8YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY/:

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
3260	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\pfhgrfhe\ImagePath = "C:\\Windows\\SysWOW64\\pfhgrfhe\\rsuvpsnf.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1414748551-1520717498-2956787782-1000\Control Panel\International\Geo\Nation	a2dac4450c8268e2c3ab41b28da9f6de.exe

Deletes itself 1 IoCs

pid	Process
4840	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5104	rsuvpsnf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5104 set thread context of 4840	5104	rsuvpsnf.exe	105

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
228	sc.exe
2356	sc.exe
3536	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1644	1492	WerFault.exe	84
1140	5104	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 4536	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	90
PID 1492 wrote to memory of 4536	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	90
PID 1492 wrote to memory of 4536	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	90
PID 1492 wrote to memory of 5040	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	92
PID 1492 wrote to memory of 5040	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	92
PID 1492 wrote to memory of 5040	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	92
PID 1492 wrote to memory of 2356	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	94
PID 1492 wrote to memory of 2356	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	94
PID 1492 wrote to memory of 2356	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	94
PID 1492 wrote to memory of 3536	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	96
PID 1492 wrote to memory of 3536	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	96
PID 1492 wrote to memory of 3536	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	96
PID 1492 wrote to memory of 228	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	99
PID 1492 wrote to memory of 228	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	99
PID 1492 wrote to memory of 228	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	99
PID 1492 wrote to memory of 3260	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	101
PID 1492 wrote to memory of 3260	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	101
PID 1492 wrote to memory of 3260	1492	a2dac4450c8268e2c3ab41b28da9f6de.exe	101
PID 5104 wrote to memory of 4840	5104	rsuvpsnf.exe	105
PID 5104 wrote to memory of 4840	5104	rsuvpsnf.exe	105
PID 5104 wrote to memory of 4840	5104	rsuvpsnf.exe	105
PID 5104 wrote to memory of 4840	5104	rsuvpsnf.exe	105
PID 5104 wrote to memory of 4840	5104	rsuvpsnf.exe	105

C:\Users\Admin\AppData\Local\Temp\a2dac4450c8268e2c3ab41b28da9f6de.exe
"C:\Users\Admin\AppData\Local\Temp\a2dac4450c8268e2c3ab41b28da9f6de.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pfhgrfhe\
  2⤵
  PID:4536
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rsuvpsnf.exe" C:\Windows\SysWOW64\pfhgrfhe\
  2⤵
  PID:5040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create pfhgrfhe binPath= "C:\Windows\SysWOW64\pfhgrfhe\rsuvpsnf.exe /d\"C:\Users\Admin\AppData\Local\Temp\a2dac4450c8268e2c3ab41b28da9f6de.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2356
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description pfhgrfhe "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start pfhgrfhe
  2⤵
  - Launches sc.exe
  PID:228
- 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:3260
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 1304
  2⤵
  - Program crash
  PID:1644

C:\Windows\SysWOW64\pfhgrfhe\rsuvpsnf.exe
C:\Windows\SysWOW64\pfhgrfhe\rsuvpsnf.exe /d"C:\Users\Admin\AppData\Local\Temp\a2dac4450c8268e2c3ab41b28da9f6de.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5104 -s 512
  2⤵
  - Program crash
  PID:1140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1492 -ip 1492
1⤵
PID:3368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5104 -ip 5104
1⤵
PID:1716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\rsuvpsnf.exe

Filesize
13.4MB

MD5
67e7af8924e445327fd48714afad42a4

SHA1
4ba14d229cbbf3e4bcd1ac89620c51fdbe4d8ece

SHA256
6c73c57dd9cd6a2fe374f2f7e8699c660f3b9d5917361f205a556a3d4f50415f

SHA512
b923d7c9389d514ac47f6594677722aac5ca43126c10985db811d9d57ead0402308f47d39876e2d3d9ee1271deb42e129b7a6669a22b7dae6a61bee7d4d8832d

Download Submit
C:\Windows\SysWOW64\pfhgrfhe\rsuvpsnf.exe

Filesize
12.5MB

MD5
ad1ed314869dd490b15081075c6f3f82

SHA1
60f67f59028f4a166cb206f9bc77e2bc00386dba

SHA256
84d893222a7dfc8b88c610d712c1e769df26ec8cdf6fe9c1d8afb868fe9ab9ea

SHA512
070b8cae2e9b36947dbcfe95c4594282f1ed6c5261f5fb35f069e3393d28fee5b598d3887917a9d217ba0f925b55bd600e5815b47746a95cf8661e1b83aa48d5

Download Submit
memory/1492-8-0x0000000000A80000-0x0000000000A93000-memory.dmp

Filesize
76KB

Download
memory/1492-4-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/1492-2-0x0000000000A80000-0x0000000000A93000-memory.dmp

Filesize
76KB

Download
memory/1492-7-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/1492-1-0x0000000000BC0000-0x0000000000CC0000-memory.dmp

Filesize
1024KB

Download
memory/4840-11-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/4840-15-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/4840-16-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/4840-18-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/4840-19-0x0000000000D30000-0x0000000000D45000-memory.dmp

Filesize
84KB

Download
memory/5104-10-0x0000000000BC0000-0x0000000000CC0000-memory.dmp

Filesize
1024KB

Download
memory/5104-12-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/5104-17-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads