tofsee | d12a5e566b0055bb51118a48444bcbfb3b9ad1a5a0679a72197365a25ff95b9d

Analysis

max time kernel
140s
max time network
121s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
10/01/2024, 22:10

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General

Target
51c00f2268dbffddcd17612cc1c0823a.exe
Size 14.1MB
Sample240110-13rcdaaag5
SHA256 d12a5e566b0055bb51118a48444bcbfb3b9ad1a5a0679a72197365a25ff95b9d
MD5 51c00f2268dbffddcd17612cc1c0823a
SHA1 651622ca0da6b207ec41aa63c17e6d0ef69aab26
SHA512 ed3e7d4e4aa8ee57b5fac2928bbd517416f0af4a8023603758c5844bc78e4a6a0d60476a08446dff40fffb89640303d600056d4af767e59fc89e3bcbbc5c972a
SSDEEP 196608:nXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXn:
MD5 SHA1 SHA512 SSDEEP

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\vranuhpu = "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
2576	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\vranuhpu\ImagePath = "C:\\Windows\\SysWOW64\\vranuhpu\\vrjhpybt.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2096	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2596	vrjhpybt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2596 set thread context of 2096	2596	vrjhpybt.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
1876	sc.exe
2588	sc.exe
2660	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 1540 wrote to memory of 2188	1540	51c00f2268dbffddcd17612cc1c0823a.exe	29
PID 1540 wrote to memory of 2188	1540	51c00f2268dbffddcd17612cc1c0823a.exe	29
PID 1540 wrote to memory of 2188	1540	51c00f2268dbffddcd17612cc1c0823a.exe	29
PID 1540 wrote to memory of 2188	1540	51c00f2268dbffddcd17612cc1c0823a.exe	29
PID 1540 wrote to memory of 2996	1540	51c00f2268dbffddcd17612cc1c0823a.exe	30
PID 1540 wrote to memory of 2996	1540	51c00f2268dbffddcd17612cc1c0823a.exe	30
PID 1540 wrote to memory of 2996	1540	51c00f2268dbffddcd17612cc1c0823a.exe	30
PID 1540 wrote to memory of 2996	1540	51c00f2268dbffddcd17612cc1c0823a.exe	30
PID 1540 wrote to memory of 1876	1540	51c00f2268dbffddcd17612cc1c0823a.exe	32
PID 1540 wrote to memory of 1876	1540	51c00f2268dbffddcd17612cc1c0823a.exe	32
PID 1540 wrote to memory of 1876	1540	51c00f2268dbffddcd17612cc1c0823a.exe	32
PID 1540 wrote to memory of 1876	1540	51c00f2268dbffddcd17612cc1c0823a.exe	32
PID 1540 wrote to memory of 2588	1540	51c00f2268dbffddcd17612cc1c0823a.exe	35
PID 1540 wrote to memory of 2588	1540	51c00f2268dbffddcd17612cc1c0823a.exe	35
PID 1540 wrote to memory of 2588	1540	51c00f2268dbffddcd17612cc1c0823a.exe	35
PID 1540 wrote to memory of 2588	1540	51c00f2268dbffddcd17612cc1c0823a.exe	35
PID 1540 wrote to memory of 2660	1540	51c00f2268dbffddcd17612cc1c0823a.exe	37
PID 1540 wrote to memory of 2660	1540	51c00f2268dbffddcd17612cc1c0823a.exe	37
PID 1540 wrote to memory of 2660	1540	51c00f2268dbffddcd17612cc1c0823a.exe	37
PID 1540 wrote to memory of 2660	1540	51c00f2268dbffddcd17612cc1c0823a.exe	37
PID 1540 wrote to memory of 2576	1540	51c00f2268dbffddcd17612cc1c0823a.exe	40
PID 1540 wrote to memory of 2576	1540	51c00f2268dbffddcd17612cc1c0823a.exe	40
PID 1540 wrote to memory of 2576	1540	51c00f2268dbffddcd17612cc1c0823a.exe	40
PID 1540 wrote to memory of 2576	1540	51c00f2268dbffddcd17612cc1c0823a.exe	40
PID 2596 wrote to memory of 2096	2596	vrjhpybt.exe	41
PID 2596 wrote to memory of 2096	2596	vrjhpybt.exe	41
PID 2596 wrote to memory of 2096	2596	vrjhpybt.exe	41
PID 2596 wrote to memory of 2096	2596	vrjhpybt.exe	41
PID 2596 wrote to memory of 2096	2596	vrjhpybt.exe	41
PID 2596 wrote to memory of 2096	2596	vrjhpybt.exe	41

C:\Users\Admin\AppData\Local\Temp\51c00f2268dbffddcd17612cc1c0823a.exe
"C:\Users\Admin\AppData\Local\Temp\51c00f2268dbffddcd17612cc1c0823a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1540
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vranuhpu\
  2⤵
  PID:2188
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vrjhpybt.exe" C:\Windows\SysWOW64\vranuhpu\
  2⤵
  PID:2996
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vranuhpu binPath= "C:\Windows\SysWOW64\vranuhpu\vrjhpybt.exe /d\"C:\Users\Admin\AppData\Local\Temp\51c00f2268dbffddcd17612cc1c0823a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1876
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vranuhpu "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2588
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vranuhpu
  2⤵
  - Launches sc.exe
  PID:2660
- 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:2576

C:\Windows\SysWOW64\vranuhpu\vrjhpybt.exe
C:\Windows\SysWOW64\vranuhpu\vrjhpybt.exe /d"C:\Users\Admin\AppData\Local\Temp\51c00f2268dbffddcd17612cc1c0823a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2596
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2096

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

memory/1540-2-0x0000000000220000-0x0000000000233000-memory.dmp

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memory/1540-4-0x0000000000400000-0x00000000008EA000-memory.dmp

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memory/1540-1-0x00000000009D0000-0x0000000000AD0000-memory.dmp

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memory/1540-7-0x0000000000400000-0x00000000008EA000-memory.dmp

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memory/1540-8-0x0000000000220000-0x0000000000233000-memory.dmp

Download

memory/2096-19-0x0000000000080000-0x0000000000095000-memory.dmp

Download

memory/2096-20-0x0000000000080000-0x0000000000095000-memory.dmp

Download

memory/2096-18-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2096-13-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2096-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Download

memory/2096-10-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2096-22-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2596-15-0x0000000000400000-0x00000000008EA000-memory.dmp

Download

memory/2596-16-0x00000000002D0000-0x00000000003D0000-memory.dmp

Download

memory/2596-21-0x00000000002D0000-0x00000000003D0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads