tofsee | 8b795f6fedee87d107c933dee81a87ce4acc9f1ec82f1b8bb69df2a87684547d

Analysis

max time kernel
150s
max time network
142s
platform
windows7_x64
resource
win7-20240319-en
resource tags

arch:x64arch:x86image:win7-20240319-enlocale:en-usos:windows7-x64system
submitted
25/03/2024, 02:12

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General

Target
dcfd015c0e5690dcb11fa707f52030ba.exe
Size 14.6MB
Sample240325-cm2amsdc98
SHA256 8b795f6fedee87d107c933dee81a87ce4acc9f1ec82f1b8bb69df2a87684547d
MD5 dcfd015c0e5690dcb11fa707f52030ba
SHA1 7af426f7a65a7a4ac6df8503222f0ce4b3e92001
SHA512 d2ba001589742c0234a9855bd6a5c14a3536e732705b1f5462c3bc993dfe5996c453f36d4ecb7899a3c8419f617af6f02ef99cbc5a87d04b75530e4107e89a3d
SSDEEP 12288:jRXQK44fy6111111111111111111111111111111111111111111111111111113:jRx2
MD5 SHA1 SHA512 SSDEEP

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\rjwaiole = "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
2676	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\rjwaiole\ImagePath = "C:\\Windows\\SysWOW64\\rjwaiole\\namjcpue.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2448	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2680	namjcpue.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2680 set thread context of 2448	2680	namjcpue.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2948	sc.exe
2616	sc.exe
2528	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 2012 wrote to memory of 2896	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	28
PID 2012 wrote to memory of 2896	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	28
PID 2012 wrote to memory of 2896	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	28
PID 2012 wrote to memory of 2896	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	28
PID 2012 wrote to memory of 2072	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	30
PID 2012 wrote to memory of 2072	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	30
PID 2012 wrote to memory of 2072	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	30
PID 2012 wrote to memory of 2072	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	30
PID 2012 wrote to memory of 2948	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	32
PID 2012 wrote to memory of 2948	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	32
PID 2012 wrote to memory of 2948	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	32
PID 2012 wrote to memory of 2948	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	32
PID 2012 wrote to memory of 2616	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	34
PID 2012 wrote to memory of 2616	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	34
PID 2012 wrote to memory of 2616	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	34
PID 2012 wrote to memory of 2616	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	34
PID 2012 wrote to memory of 2528	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	36
PID 2012 wrote to memory of 2528	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	36
PID 2012 wrote to memory of 2528	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	36
PID 2012 wrote to memory of 2528	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	36
PID 2012 wrote to memory of 2676	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	38
PID 2012 wrote to memory of 2676	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	38
PID 2012 wrote to memory of 2676	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	38
PID 2012 wrote to memory of 2676	2012	dcfd015c0e5690dcb11fa707f52030ba.exe	38
PID 2680 wrote to memory of 2448	2680	namjcpue.exe	41
PID 2680 wrote to memory of 2448	2680	namjcpue.exe	41
PID 2680 wrote to memory of 2448	2680	namjcpue.exe	41
PID 2680 wrote to memory of 2448	2680	namjcpue.exe	41
PID 2680 wrote to memory of 2448	2680	namjcpue.exe	41
PID 2680 wrote to memory of 2448	2680	namjcpue.exe	41

C:\Users\Admin\AppData\Local\Temp\dcfd015c0e5690dcb11fa707f52030ba.exe
"C:\Users\Admin\AppData\Local\Temp\dcfd015c0e5690dcb11fa707f52030ba.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rjwaiole\
  2⤵
  PID:2896
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\namjcpue.exe" C:\Windows\SysWOW64\rjwaiole\
  2⤵
  PID:2072
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rjwaiole binPath= "C:\Windows\SysWOW64\rjwaiole\namjcpue.exe /d\"C:\Users\Admin\AppData\Local\Temp\dcfd015c0e5690dcb11fa707f52030ba.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2948
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rjwaiole "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2616
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rjwaiole
  2⤵
  - Launches sc.exe
  PID:2528
- 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:2676

C:\Windows\SysWOW64\rjwaiole\namjcpue.exe
C:\Windows\SysWOW64\rjwaiole\namjcpue.exe /d"C:\Users\Admin\AppData\Local\Temp\dcfd015c0e5690dcb11fa707f52030ba.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2448

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

namjcpue.exe

Path C:\Users\Admin\AppData\Local\Temp\namjcpue.exe
Size 3.0MB
SHA256 64c60cfe8e27c8f30526f27ed13dbaff88ff94b513aca147d04369db20d6b115
MD5 9e02506a9bbd2949c9babd269d3d8089
SHA1 bd44b807379f1d472d2936e1e6870c45507afa8f
SHA512 f9b3fe3bb38bf6b45a11f5454cf56eb44ea277eeec91f04a99c6a483b5058e339e517385165ed2dd339fdde9fd2c801b12c236389a190505897d1c8a3919e7bf
SSDEEP 12288:URXQK44fy6111111111111111111111111111111111111111111111111111115:URx22
MD5 SHA1 SHA512 SSDEEP

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namjcpue.exe

Path C:\Windows\SysWOW64\rjwaiole\namjcpue.exe
Size 3.4MB
SHA256 5e070d90307759945ecfd3c9aec985f304891cb02b569c1768eb4487ace2cc32
MD5 f35ef8469b606efe68c8a59f16a780ce
SHA1 8a23c86d0080148a79cc4e43e2a4af5037b20bba
SHA512 f432089d615629ff9eba2f003d731097146bf1440a5b5ab09de18ca8be918c3cd871e2c62368ae7e8cf766380c0b511c44a003cbfba82767c6231f82cced9db6
SSDEEP 12288:URXQK44fy6111111111111111111111111111111111111111111111111111115:URx22
MD5 SHA1 SHA512 SSDEEP

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memory/2012-1-0x00000000034F0000-0x00000000035F0000-memory.dmp

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memory/2012-2-0x0000000000020000-0x0000000000033000-memory.dmp

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memory/2012-4-0x0000000000400000-0x0000000003359000-memory.dmp

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memory/2012-6-0x0000000000400000-0x0000000003359000-memory.dmp

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memory/2012-7-0x0000000000020000-0x0000000000033000-memory.dmp

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memory/2448-11-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2448-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2448-14-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2448-20-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2448-21-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2448-22-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/2680-10-0x0000000003470000-0x0000000003570000-memory.dmp

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memory/2680-16-0x0000000000400000-0x0000000003359000-memory.dmp

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memory/2680-17-0x0000000000400000-0x0000000003359000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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