tofsee | 8739c401481797fd525a75b799e243df0e5f8a6a5f6b72916a4ee2cfef5d3241

Analysis

max time kernel
149s
max time network
133s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
06/01/2024, 10:51

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General

Target

5e6086238549e4676d4500e6e1f63b59.exe
Size

10.1MB
MD5

5e6086238549e4676d4500e6e1f63b59
SHA1

61ded98258a29af65080d519305ec9acd810e217
SHA256

8739c401481797fd525a75b799e243df0e5f8a6a5f6b72916a4ee2cfef5d3241
SHA512

9914f1eba1d727db56cf05064e7e37c6443f28f749863a4d3387efa436d5af5b3e3cbbc2a5cde63df5aa52ab30b0f49702ff1b479cf236731da576002d5bc470
SSDEEP

49152:I8KGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG3:I8

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6

lazystax.ru

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\bdoeljsu = "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
2772	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\bdoeljsu\ImagePath = "C:\\Windows\\SysWOW64\\bdoeljsu\\hewnjawu.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2516	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2652	hewnjawu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2652 set thread context of 2516	2652	hewnjawu.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2724	sc.exe
2808	sc.exe
2704	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 1888 wrote to memory of 1464	1888	5e6086238549e4676d4500e6e1f63b59.exe	28
PID 1888 wrote to memory of 1464	1888	5e6086238549e4676d4500e6e1f63b59.exe	28
PID 1888 wrote to memory of 1464	1888	5e6086238549e4676d4500e6e1f63b59.exe	28
PID 1888 wrote to memory of 1464	1888	5e6086238549e4676d4500e6e1f63b59.exe	28
PID 1888 wrote to memory of 2568	1888	5e6086238549e4676d4500e6e1f63b59.exe	30
PID 1888 wrote to memory of 2568	1888	5e6086238549e4676d4500e6e1f63b59.exe	30
PID 1888 wrote to memory of 2568	1888	5e6086238549e4676d4500e6e1f63b59.exe	30
PID 1888 wrote to memory of 2568	1888	5e6086238549e4676d4500e6e1f63b59.exe	30
PID 1888 wrote to memory of 2724	1888	5e6086238549e4676d4500e6e1f63b59.exe	32
PID 1888 wrote to memory of 2724	1888	5e6086238549e4676d4500e6e1f63b59.exe	32
PID 1888 wrote to memory of 2724	1888	5e6086238549e4676d4500e6e1f63b59.exe	32
PID 1888 wrote to memory of 2724	1888	5e6086238549e4676d4500e6e1f63b59.exe	32
PID 1888 wrote to memory of 2808	1888	5e6086238549e4676d4500e6e1f63b59.exe	34
PID 1888 wrote to memory of 2808	1888	5e6086238549e4676d4500e6e1f63b59.exe	34
PID 1888 wrote to memory of 2808	1888	5e6086238549e4676d4500e6e1f63b59.exe	34
PID 1888 wrote to memory of 2808	1888	5e6086238549e4676d4500e6e1f63b59.exe	34
PID 1888 wrote to memory of 2704	1888	5e6086238549e4676d4500e6e1f63b59.exe	36
PID 1888 wrote to memory of 2704	1888	5e6086238549e4676d4500e6e1f63b59.exe	36
PID 1888 wrote to memory of 2704	1888	5e6086238549e4676d4500e6e1f63b59.exe	36
PID 1888 wrote to memory of 2704	1888	5e6086238549e4676d4500e6e1f63b59.exe	36
PID 1888 wrote to memory of 2772	1888	5e6086238549e4676d4500e6e1f63b59.exe	39
PID 1888 wrote to memory of 2772	1888	5e6086238549e4676d4500e6e1f63b59.exe	39
PID 1888 wrote to memory of 2772	1888	5e6086238549e4676d4500e6e1f63b59.exe	39
PID 1888 wrote to memory of 2772	1888	5e6086238549e4676d4500e6e1f63b59.exe	39
PID 2652 wrote to memory of 2516	2652	hewnjawu.exe	41
PID 2652 wrote to memory of 2516	2652	hewnjawu.exe	41
PID 2652 wrote to memory of 2516	2652	hewnjawu.exe	41
PID 2652 wrote to memory of 2516	2652	hewnjawu.exe	41
PID 2652 wrote to memory of 2516	2652	hewnjawu.exe	41
PID 2652 wrote to memory of 2516	2652	hewnjawu.exe	41

C:\Users\Admin\AppData\Local\Temp\5e6086238549e4676d4500e6e1f63b59.exe
"C:\Users\Admin\AppData\Local\Temp\5e6086238549e4676d4500e6e1f63b59.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1888
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bdoeljsu\
  2⤵
  PID:1464
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hewnjawu.exe" C:\Windows\SysWOW64\bdoeljsu\
  2⤵
  PID:2568
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bdoeljsu binPath= "C:\Windows\SysWOW64\bdoeljsu\hewnjawu.exe /d\"C:\Users\Admin\AppData\Local\Temp\5e6086238549e4676d4500e6e1f63b59.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bdoeljsu "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2808
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bdoeljsu
  2⤵
  - Launches sc.exe
  PID:2704
- 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:2772

C:\Windows\SysWOW64\bdoeljsu\hewnjawu.exe
C:\Windows\SysWOW64\bdoeljsu\hewnjawu.exe /d"C:\Users\Admin\AppData\Local\Temp\5e6086238549e4676d4500e6e1f63b59.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2652
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2516

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\hewnjawu.exe

Filesize
10.1MB

MD5
5e6086238549e4676d4500e6e1f63b59

SHA1
61ded98258a29af65080d519305ec9acd810e217

SHA256
8739c401481797fd525a75b799e243df0e5f8a6a5f6b72916a4ee2cfef5d3241

SHA512
9914f1eba1d727db56cf05064e7e37c6443f28f749863a4d3387efa436d5af5b3e3cbbc2a5cde63df5aa52ab30b0f49702ff1b479cf236731da576002d5bc470

Download Submit
memory/1888-1-0x0000000000DA0000-0x0000000000EA0000-memory.dmp

Filesize
1024KB

Download
memory/1888-3-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1888-4-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/1888-7-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2516-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2516-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2516-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2516-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2516-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2516-21-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2652-10-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2652-9-0x0000000000CA0000-0x0000000000DA0000-memory.dmp

Filesize
1024KB

Download
memory/2652-15-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads