tofsee | 6f5cadfef60d9b5e9ad27f6135b19280b0a4ffd8d07bf2f0a91314755659066b

Analysis

max time kernel
144s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-09-2024 09:55

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General

Target

20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe
Size

11.3MB
MD5

857c95c3ee1e86954bfbfc7e4d871caa
SHA1

c8fcaceb46e37f229eb099064af340e1ebdda13a
SHA256

6f5cadfef60d9b5e9ad27f6135b19280b0a4ffd8d07bf2f0a91314755659066b
SHA512

ff5c7fcbfa3c4f0ad38a3dcadfd58441b2afc678a0459a876ec7a087af639bad9a02f5fd50dd07bf5b506b18ccf215017c23fd6643614ac906f2cd049793ac77
SSDEEP

12288:1Vbj7zJB99tzBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBh:1JzXd

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation 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\xbesxajr = "0"	svchost.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2800	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\xbesxajr\ImagePath = "C:\\Windows\\SysWOW64\\xbesxajr\\cexipxlb.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2140	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2700	cexipxlb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2700 set thread context of 2140	2700	cexipxlb.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2068	sc.exe
2568	sc.exe
2840	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cexipxlb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1940 wrote to memory of 2764	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	30
PID 1940 wrote to memory of 2764	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	30
PID 1940 wrote to memory of 2764	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	30
PID 1940 wrote to memory of 2764	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	30
PID 1940 wrote to memory of 2100	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	32
PID 1940 wrote to memory of 2100	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	32
PID 1940 wrote to memory of 2100	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	32
PID 1940 wrote to memory of 2100	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	32
PID 1940 wrote to memory of 2068	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	34
PID 1940 wrote to memory of 2068	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	34
PID 1940 wrote to memory of 2068	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	34
PID 1940 wrote to memory of 2068	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	34
PID 1940 wrote to memory of 2568	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	36
PID 1940 wrote to memory of 2568	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	36
PID 1940 wrote to memory of 2568	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	36
PID 1940 wrote to memory of 2568	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	36
PID 1940 wrote to memory of 2840	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	38
PID 1940 wrote to memory of 2840	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	38
PID 1940 wrote to memory of 2840	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	38
PID 1940 wrote to memory of 2840	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	38
PID 1940 wrote to memory of 2800	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	41
PID 1940 wrote to memory of 2800	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	41
PID 1940 wrote to memory of 2800	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	41
PID 1940 wrote to memory of 2800	1940	20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe	41
PID 2700 wrote to memory of 2140	2700	cexipxlb.exe	43
PID 2700 wrote to memory of 2140	2700	cexipxlb.exe	43
PID 2700 wrote to memory of 2140	2700	cexipxlb.exe	43
PID 2700 wrote to memory of 2140	2700	cexipxlb.exe	43
PID 2700 wrote to memory of 2140	2700	cexipxlb.exe	43
PID 2700 wrote to memory of 2140	2700	cexipxlb.exe	43

C:\Users\Admin\AppData\Local\Temp\20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe
"C:\Users\Admin\AppData\Local\Temp\20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xbesxajr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2764
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cexipxlb.exe" C:\Windows\SysWOW64\xbesxajr\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xbesxajr binPath= "C:\Windows\SysWOW64\xbesxajr\cexipxlb.exe /d\"C:\Users\Admin\AppData\Local\Temp\20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2068
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xbesxajr "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2568
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xbesxajr
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2840
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:2800

C:\Windows\SysWOW64\xbesxajr\cexipxlb.exe
C:\Windows\SysWOW64\xbesxajr\cexipxlb.exe /d"C:\Users\Admin\AppData\Local\Temp\20240921857c95c3ee1e86954bfbfc7e4d871caamafia.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2140

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
13.5MB

MD5
52f66aea3d11533c8c0d44cd3c97bf3f

SHA1
f4db7c4cf6c17396db05779d6ef9a9c024628645

SHA256
d2985af2de64cbc1b037a1cdf1a499e9dc58e0d3d3aa9e33f2db116dc7b6a905

SHA512
d5d5f09e9d6b8291b3d635aa68456567d46546d77bf4d0cfbf9c0b1f1e86381386aca7152de3da9449d81b0e746a4403c2e6fe3e81c2a9674f84d45616bf783c

Download Submit
memory/1940-8-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/1940-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1940-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/1940-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1940-9-0x00000000004E0000-0x00000000005E0000-memory.dmp

Filesize
1024KB

Download
memory/1940-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

Filesize
1024KB

Download
memory/1940-7-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/2140-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2140-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2140-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2140-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2140-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2700-18-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads