tofsee | af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9

General

Target

af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe
Size

13.8MB
MD5

4842a0bebf959ba6fdc4b18107c78094
SHA1

237f34e23c2853820a1faf6aed7bc7af837dae41
SHA256

af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9
SHA512

2098a9e8b61f27f41854d34d4833571be3a0fc163c2ee83f5aea4bbcf49f44da362980da43744e7b10456a8aec4034455e271e4b3117946e6891bc1bf18ca4ca
SSDEEP

196608:kxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxz:8

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\sjfvixz = "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

Processes:

netsh.exe

pid process

2776 netsh.exe

pid	process
2776	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\sjfvixz\ImagePath = "C:\\Windows\\SysWOW64\\sjfvixz\\umelkbmt.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2512 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

umelkbmt.exe

pid process

2848 umelkbmt.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

umelkbmt.exe

description pid process target process

PID 2848 set thread context of 2512 2848 umelkbmt.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2292 sc.exe
2312 sc.exe
2832 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2512	svchost.exe

pid	process
2848	umelkbmt.exe

description	pid	process	target process
PID 2848 set thread context of 2512	2848	umelkbmt.exe	svchost.exe

pid	process
2292	sc.exe
2312	sc.exe
2832	sc.exe

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

Processes:

netsh.exe

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

Processes:

cmd.execmd.exesc.exeumelkbmt.exesvchost.exeaf242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exesc.exesc.exenetsh.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	umelkbmt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.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	netsh.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exeumelkbmt.exe

description	pid	process	target process
PID 1096 wrote to memory of 2076	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	cmd.exe
PID 1096 wrote to memory of 2076	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	cmd.exe
PID 1096 wrote to memory of 2076	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	cmd.exe
PID 1096 wrote to memory of 2076	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	cmd.exe
PID 1096 wrote to memory of 2052	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	cmd.exe
PID 1096 wrote to memory of 2052	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	cmd.exe
PID 1096 wrote to memory of 2052	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	cmd.exe
PID 1096 wrote to memory of 2052	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	cmd.exe
PID 1096 wrote to memory of 2292	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2292	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2292	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2292	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2312	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2312	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2312	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2312	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2832	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2832	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2832	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2832	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	sc.exe
PID 1096 wrote to memory of 2776	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	netsh.exe
PID 1096 wrote to memory of 2776	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	netsh.exe
PID 1096 wrote to memory of 2776	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	netsh.exe
PID 1096 wrote to memory of 2776	1096	af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe	netsh.exe
PID 2848 wrote to memory of 2512	2848	umelkbmt.exe	svchost.exe
PID 2848 wrote to memory of 2512	2848	umelkbmt.exe	svchost.exe
PID 2848 wrote to memory of 2512	2848	umelkbmt.exe	svchost.exe
PID 2848 wrote to memory of 2512	2848	umelkbmt.exe	svchost.exe
PID 2848 wrote to memory of 2512	2848	umelkbmt.exe	svchost.exe
PID 2848 wrote to memory of 2512	2848	umelkbmt.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe
"C:\Users\Admin\AppData\Local\Temp\af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sjfvixz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2076
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\umelkbmt.exe" C:\Windows\SysWOW64\sjfvixz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create sjfvixz binPath= "C:\Windows\SysWOW64\sjfvixz\umelkbmt.exe /d\"C:\Users\Admin\AppData\Local\Temp\af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2292
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description sjfvixz "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2312
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start sjfvixz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2832
- 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:2776

C:\Windows\SysWOW64\sjfvixz\umelkbmt.exe
C:\Windows\SysWOW64\sjfvixz\umelkbmt.exe /d"C:\Users\Admin\AppData\Local\Temp\af242def7641cca5cd70a3da05b44a45efd70102f39b376b65f8b3a07d6a23a9.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2848
- 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:2512

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify System Firewall

1

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
14.4MB

MD5
0c59b4c6907b0ca14cfbc89784862c50

SHA1
23f0c0367c569a2dd42a6e13c9ebc0c130f50468

SHA256
4b506ddbe88c659a09705477aa0a661d40513eae9c434d233ea28a28bfa73f89

SHA512
9fc46092766e00c6a8d79ddb30e84c665386c0616218741e0cfc1200cec4bbdbd89bac882985eab0dfa0908b316187e7e7dd1f8e5d4908a47c144c73e78dfc2b

Download Submit
memory/1096-8-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/1096-2-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1096-1-0x0000000000230000-0x0000000000243000-memory.dmp

Filesize
76KB

Download
memory/1096-6-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download
memory/1096-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1096-0-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/1096-7-0x0000000000220000-0x000000000022D000-memory.dmp

Filesize
52KB

Download
memory/2512-13-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2512-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2512-10-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2512-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2512-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2848-16-0x0000000000400000-0x0000000002F06000-memory.dmp

Filesize
43.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads