tofsee | e260edd16a6525f611e8a30f5a8c0e5abd63871cad27f8366f79529d627800b0

Analysis

max time kernel
144s
max time network
144s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
19/12/2023, 10:38

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General

Target

09f646eca6cf8443ce6fd1af985bc53e.exe
Size

12.8MB
MD5

09f646eca6cf8443ce6fd1af985bc53e
SHA1

3e179cfd3c4344f3d8e4642a5cb2e71cfcf536e1
SHA256

e260edd16a6525f611e8a30f5a8c0e5abd63871cad27f8366f79529d627800b0
SHA512

180501519579f94a8e8139d23bf25c349867793b98418b889cf2d056d55f4c1e067747ab720fae060346a03b24ec905abaad2c04385717fa84397fd54a365411
SSDEEP

49152:8UkssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssH:8

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru

refabyd.info

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

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\qurigwon = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2624	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\qurigwon\ImagePath = "C:\\Windows\\SysWOW64\\qurigwon\\ushtnjuk.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2744	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2752	ushtnjuk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2752 set thread context of 2744	2752	ushtnjuk.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2700	sc.exe
2908	sc.exe
2372	sc.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2704	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	28
PID 1760 wrote to memory of 2704	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	28
PID 1760 wrote to memory of 2704	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	28
PID 1760 wrote to memory of 2704	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	28
PID 1760 wrote to memory of 2804	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	30
PID 1760 wrote to memory of 2804	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	30
PID 1760 wrote to memory of 2804	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	30
PID 1760 wrote to memory of 2804	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	30
PID 1760 wrote to memory of 2700	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	32
PID 1760 wrote to memory of 2700	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	32
PID 1760 wrote to memory of 2700	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	32
PID 1760 wrote to memory of 2700	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	32
PID 1760 wrote to memory of 2908	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	34
PID 1760 wrote to memory of 2908	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	34
PID 1760 wrote to memory of 2908	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	34
PID 1760 wrote to memory of 2908	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	34
PID 1760 wrote to memory of 2372	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	36
PID 1760 wrote to memory of 2372	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	36
PID 1760 wrote to memory of 2372	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	36
PID 1760 wrote to memory of 2372	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	36
PID 1760 wrote to memory of 2624	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	39
PID 1760 wrote to memory of 2624	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	39
PID 1760 wrote to memory of 2624	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	39
PID 1760 wrote to memory of 2624	1760	09f646eca6cf8443ce6fd1af985bc53e.exe	39
PID 2752 wrote to memory of 2744	2752	ushtnjuk.exe	41
PID 2752 wrote to memory of 2744	2752	ushtnjuk.exe	41
PID 2752 wrote to memory of 2744	2752	ushtnjuk.exe	41
PID 2752 wrote to memory of 2744	2752	ushtnjuk.exe	41
PID 2752 wrote to memory of 2744	2752	ushtnjuk.exe	41
PID 2752 wrote to memory of 2744	2752	ushtnjuk.exe	41

C:\Users\Admin\AppData\Local\Temp\09f646eca6cf8443ce6fd1af985bc53e.exe
"C:\Users\Admin\AppData\Local\Temp\09f646eca6cf8443ce6fd1af985bc53e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qurigwon\
  2⤵
  PID:2704
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ushtnjuk.exe" C:\Windows\SysWOW64\qurigwon\
  2⤵
  PID:2804
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qurigwon binPath= "C:\Windows\SysWOW64\qurigwon\ushtnjuk.exe /d\"C:\Users\Admin\AppData\Local\Temp\09f646eca6cf8443ce6fd1af985bc53e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2700
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qurigwon "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2908
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qurigwon
  2⤵
  - Launches sc.exe
  PID:2372
- 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:2624

C:\Windows\SysWOW64\qurigwon\ushtnjuk.exe
C:\Windows\SysWOW64\qurigwon\ushtnjuk.exe /d"C:\Users\Admin\AppData\Local\Temp\09f646eca6cf8443ce6fd1af985bc53e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
14.7MB

MD5
6f967b84ec4037b3defc372f875cf601

SHA1
77044818861354a1ebad528c8760fc612b42e3d1

SHA256
bf78cbeea9797f2d1e22666c1579963d53c0c0121ef94f77bd0cfff24965c9c5

SHA512
49070a6a000717805a57231cf382d0015579a049a7e414f520972899d3f9d589d722a5eba8cf724adb97592e93578ed226d2d98bb9380b6c7753e9f12282f0f6

Download Submit
C:\Windows\SysWOW64\qurigwon\ushtnjuk.exe

Filesize
4.1MB

MD5
874ce4957cb8b590ec7949928f8f7124

SHA1
2952b9e3f98ed7f479c9a71fbbec02de9e50c5cb

SHA256
b8bd309ae7e971013a9a6cb337a0cce0fb17c5ecb6a49c0aed3ac8aae3259c4b

SHA512
5720af032ecebc96afdb209086572c2e4d269acdb66b144f265a420ab72ae06c1ab8639bd3d6247a90c8dfc05fb0896c0e27cf91733191204b2c86a1322afd18

Download Submit
memory/1760-3-0x0000000000020000-0x0000000000033000-memory.dmp

Filesize
76KB

Download
memory/1760-1-0x0000000000980000-0x0000000000A80000-memory.dmp

Filesize
1024KB

Download
memory/1760-4-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/1760-8-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/2744-13-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2744-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2744-10-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2744-17-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2744-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2744-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2752-15-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/2752-18-0x0000000000400000-0x000000000086B000-memory.dmp

Filesize
4.4MB

Download
memory/2752-9-0x0000000000270000-0x0000000000370000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads