tofsee | ac6ff653497ef0da394e6485c2a29b584c602ae1fbed0a5327737e756045cc68

Analysis

max time kernel
150s
max time network
158s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
13/07/2024, 18:45

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General

Target

f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe
Size

12.6MB
MD5

cf953172d519ed07cd91f7f7dec6f211
SHA1

f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e
SHA256

8ced1da1b88450287ebb864f90067326a063b1c210942d0437be688b917cba5f
SHA512

8c700ad78e719ee6b2b9a03ce1a427381f714f927050af34592f99b440fcb59f1f4b1691229de64c6461f30b03e7c732542d41d3d3cf9d90d027509d82586eb3
SSDEEP

12288:QyKS0FRvqPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP:5MS

Score

10^/10

tofsee 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\fjcumdwd = "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
4312	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\fjcumdwd\ImagePath = "C:\\Windows\\SysWOW64\\fjcumdwd\\xjkezvwt.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
4636	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2312	xjkezvwt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2312 set thread context of 4636	2312	xjkezvwt.exe	83

Launches sc.exe 3 IoCs

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

pid	Process
2064	sc.exe
1036	sc.exe
2100	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 queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 5008 wrote to memory of 5036	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	72
PID 5008 wrote to memory of 5036	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	72
PID 5008 wrote to memory of 5036	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	72
PID 5008 wrote to memory of 2316	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	74
PID 5008 wrote to memory of 2316	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	74
PID 5008 wrote to memory of 2316	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	74
PID 5008 wrote to memory of 2064	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	76
PID 5008 wrote to memory of 2064	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	76
PID 5008 wrote to memory of 2064	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	76
PID 5008 wrote to memory of 1036	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	78
PID 5008 wrote to memory of 1036	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	78
PID 5008 wrote to memory of 1036	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	78
PID 5008 wrote to memory of 2100	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	80
PID 5008 wrote to memory of 2100	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	80
PID 5008 wrote to memory of 2100	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	80
PID 2312 wrote to memory of 4636	2312	xjkezvwt.exe	83
PID 2312 wrote to memory of 4636	2312	xjkezvwt.exe	83
PID 2312 wrote to memory of 4636	2312	xjkezvwt.exe	83
PID 2312 wrote to memory of 4636	2312	xjkezvwt.exe	83
PID 2312 wrote to memory of 4636	2312	xjkezvwt.exe	83
PID 5008 wrote to memory of 4312	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	84
PID 5008 wrote to memory of 4312	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	84
PID 5008 wrote to memory of 4312	5008	f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe	84

C:\Users\Admin\AppData\Local\Temp\f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe
"C:\Users\Admin\AppData\Local\Temp\f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fjcumdwd\
  2⤵
  PID:5036
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xjkezvwt.exe" C:\Windows\SysWOW64\fjcumdwd\
  2⤵
  PID:2316
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create fjcumdwd binPath= "C:\Windows\SysWOW64\fjcumdwd\xjkezvwt.exe /d\"C:\Users\Admin\AppData\Local\Temp\f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2064
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description fjcumdwd "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1036
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start fjcumdwd
  2⤵
  - Launches sc.exe
  PID:2100
- 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
  PID:4312

C:\Windows\SysWOW64\fjcumdwd\xjkezvwt.exe
C:\Windows\SysWOW64\fjcumdwd\xjkezvwt.exe /d"C:\Users\Admin\AppData\Local\Temp\f86dd9321d7d4d5d9b2ff5b3a61871ae407c310e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:4636

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
10.5MB

MD5
13e9cb85b66dc775099224e8e08ccf86

SHA1
8d90b3136186484f7c6aedc27741decdfdface25

SHA256
819a25d9647df6d24be7047cdf592eaa4b8094b2677cec240d4e327fd2767ba0

SHA512
784844acbbc4e309e68f9b6624b50cee36f1d4de5ed41ed5fd2adcdb3ea6dd87a3e0fc1f558c68e5dbd867f38a8f6efdc69acf6b9b0ed15796642601a9755aca

Download Submit
memory/2312-10-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4636-7-0x00000000008A0000-0x00000000008B5000-memory.dmp

Filesize
84KB

Download
memory/4636-13-0x00000000008A0000-0x00000000008B5000-memory.dmp

Filesize
84KB

Download
memory/4636-14-0x00000000008A0000-0x00000000008B5000-memory.dmp

Filesize
84KB

Download
memory/5008-0-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/5008-1-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/5008-2-0x00000000005C0000-0x00000000005C1000-memory.dmp

Filesize
4KB

Download
memory/5008-12-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads