tofsee | 4cac9e3b3d8e0446cbbe43456e8b44bf8b4cd0ac99f9c00552904c623fb03e3c

Analysis

max time kernel
145s
max time network
118s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
26/01/2024, 00:20

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General

Target

75e5182964f42c0b0761107ea401338d.exe
Size

10.5MB
MD5

75e5182964f42c0b0761107ea401338d
SHA1

1095924492b72640c229e9712b69fdbb94681d8e
SHA256

4cac9e3b3d8e0446cbbe43456e8b44bf8b4cd0ac99f9c00552904c623fb03e3c
SHA512

3230af9491cfee8a4358ba465f928d18b3c9c869af36501eaf228b6f6d15c0cd380609254ce12e4ef2585fd2828e31b4e626fea11b33b23bf45a66f2a3fc6b0a
SSDEEP

98304:ivjOF//////////////////////////////////////////////////////////H:0

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

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\jninydga = "0"	svchost.exe

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
2616	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\jninydga\ImagePath = "C:\\Windows\\SysWOW64\\jninydga\\ihvxlijb.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1568	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2704	ihvxlijb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2704 set thread context of 1568	2704	ihvxlijb.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2160	sc.exe
2276	sc.exe
2672	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 2316 wrote to memory of 3040	2316	75e5182964f42c0b0761107ea401338d.exe	28
PID 2316 wrote to memory of 3040	2316	75e5182964f42c0b0761107ea401338d.exe	28
PID 2316 wrote to memory of 3040	2316	75e5182964f42c0b0761107ea401338d.exe	28
PID 2316 wrote to memory of 3040	2316	75e5182964f42c0b0761107ea401338d.exe	28
PID 2316 wrote to memory of 2088	2316	75e5182964f42c0b0761107ea401338d.exe	31
PID 2316 wrote to memory of 2088	2316	75e5182964f42c0b0761107ea401338d.exe	31
PID 2316 wrote to memory of 2088	2316	75e5182964f42c0b0761107ea401338d.exe	31
PID 2316 wrote to memory of 2088	2316	75e5182964f42c0b0761107ea401338d.exe	31
PID 2316 wrote to memory of 2160	2316	75e5182964f42c0b0761107ea401338d.exe	33
PID 2316 wrote to memory of 2160	2316	75e5182964f42c0b0761107ea401338d.exe	33
PID 2316 wrote to memory of 2160	2316	75e5182964f42c0b0761107ea401338d.exe	33
PID 2316 wrote to memory of 2160	2316	75e5182964f42c0b0761107ea401338d.exe	33
PID 2316 wrote to memory of 2276	2316	75e5182964f42c0b0761107ea401338d.exe	34
PID 2316 wrote to memory of 2276	2316	75e5182964f42c0b0761107ea401338d.exe	34
PID 2316 wrote to memory of 2276	2316	75e5182964f42c0b0761107ea401338d.exe	34
PID 2316 wrote to memory of 2276	2316	75e5182964f42c0b0761107ea401338d.exe	34
PID 2316 wrote to memory of 2672	2316	75e5182964f42c0b0761107ea401338d.exe	36
PID 2316 wrote to memory of 2672	2316	75e5182964f42c0b0761107ea401338d.exe	36
PID 2316 wrote to memory of 2672	2316	75e5182964f42c0b0761107ea401338d.exe	36
PID 2316 wrote to memory of 2672	2316	75e5182964f42c0b0761107ea401338d.exe	36
PID 2316 wrote to memory of 2616	2316	75e5182964f42c0b0761107ea401338d.exe	40
PID 2316 wrote to memory of 2616	2316	75e5182964f42c0b0761107ea401338d.exe	40
PID 2316 wrote to memory of 2616	2316	75e5182964f42c0b0761107ea401338d.exe	40
PID 2316 wrote to memory of 2616	2316	75e5182964f42c0b0761107ea401338d.exe	40
PID 2704 wrote to memory of 1568	2704	ihvxlijb.exe	41
PID 2704 wrote to memory of 1568	2704	ihvxlijb.exe	41
PID 2704 wrote to memory of 1568	2704	ihvxlijb.exe	41
PID 2704 wrote to memory of 1568	2704	ihvxlijb.exe	41
PID 2704 wrote to memory of 1568	2704	ihvxlijb.exe	41
PID 2704 wrote to memory of 1568	2704	ihvxlijb.exe	41

C:\Users\Admin\AppData\Local\Temp\75e5182964f42c0b0761107ea401338d.exe
"C:\Users\Admin\AppData\Local\Temp\75e5182964f42c0b0761107ea401338d.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jninydga\
  2⤵
  PID:3040
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ihvxlijb.exe" C:\Windows\SysWOW64\jninydga\
  2⤵
  PID:2088
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jninydga binPath= "C:\Windows\SysWOW64\jninydga\ihvxlijb.exe /d\"C:\Users\Admin\AppData\Local\Temp\75e5182964f42c0b0761107ea401338d.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2160
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jninydga "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2276
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jninydga
  2⤵
  - Launches sc.exe
  PID:2672
- 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:2616

C:\Windows\SysWOW64\jninydga\ihvxlijb.exe
C:\Windows\SysWOW64\jninydga\ihvxlijb.exe /d"C:\Users\Admin\AppData\Local\Temp\75e5182964f42c0b0761107ea401338d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2704
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:1568

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 System Firewall

T1562.004

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\ihvxlijb.exe

Filesize
5.2MB

MD5
6135bed7dda3db02c0db05037e55c493

SHA1
254f6aed8813b2e2db879e9f1874cbabebc98a54

SHA256
4ab6a86b6891cdc422dfe1e3bf7cff03cb08f9cb17934beed709dd51aeac9a98

SHA512
1a8fd9853af5464b4082551bc1b83a967822a197ce186d80b9a380e7020f8c952f990915046bf7b1b6d7c126758d7c966fa243f47b9b4de4f825a3b5e16f9125

Download Submit
C:\Windows\SysWOW64\jninydga\ihvxlijb.exe

Filesize
1.3MB

MD5
09fd040ce2d4c919e8584324c1cda053

SHA1
fa7e9ca40c89b4e72e2cd5d9675a50c6de83ae7a

SHA256
00b5ea3909aeacb9b899921aa084207a589d88a0b798855cdfd1d87af0ab8803

SHA512
8730631b8531bee87a23de964ae2b993fc83c39b527c07025b6eafb83b09173c426644c2000eb46bf51b5734ba29e68d3efeb0ff9d6bff7c76e254334764a333

Download Submit
memory/1568-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1568-9-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/1568-12-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/1568-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/1568-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/1568-21-0x00000000000D0000-0x00000000000E5000-memory.dmp

Filesize
84KB

Download
memory/2316-4-0x0000000000400000-0x0000000000C1F000-memory.dmp

Filesize
8.1MB

Download
memory/2316-3-0x00000000003C0000-0x00000000003D3000-memory.dmp

Filesize
76KB

Download
memory/2316-7-0x0000000000400000-0x0000000000C1F000-memory.dmp

Filesize
8.1MB

Download
memory/2316-1-0x0000000000250000-0x0000000000350000-memory.dmp

Filesize
1024KB

Download
memory/2704-14-0x0000000000D80000-0x0000000000E80000-memory.dmp

Filesize
1024KB

Download
memory/2704-16-0x0000000000400000-0x0000000000C1F000-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