tofsee | afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2

General

Target

afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe
Size

11.7MB
MD5

41e5a3e35502d37dbc0bf74651a2ec6c
SHA1

f50ce2fc231fc554a1592af2ca6ac1a8c4918286
SHA256

afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2
SHA512

0ff1255b91beb2c252a436fdc095cacb5a19c674037457743406024174e841d7285c0aa5abcfd47c7bd21999f313e13343e3675d3ecdbb8f9d760775befd9db9
SSDEEP

49152:Dyn7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7x7xd:DyB

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

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

4668 netsh.exe

pid	process
4668	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\jdcrpfac\ImagePath = "C:\\Windows\\SysWOW64\\jdcrpfac\\ctbzjelz.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

4004 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

ctbzjelz.exe

pid process

4596 ctbzjelz.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

ctbzjelz.exe

description pid process target process

PID 4596 set thread context of 4004 4596 ctbzjelz.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

4340 sc.exe
4748 sc.exe
4680 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4004	svchost.exe

pid	process
4596	ctbzjelz.exe

description	pid	process	target process
PID 4596 set thread context of 4004	4596	ctbzjelz.exe	svchost.exe

pid	process
4340	sc.exe
4748	sc.exe
4680	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 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

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
3520	4860	WerFault.exe	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe
3176	4596	WerFault.exe	ctbzjelz.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:

afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.execmd.exesc.exesc.exectbzjelz.exesvchost.execmd.exesc.exenetsh.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.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	ctbzjelz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exectbzjelz.exe

description	pid	process	target process
PID 4860 wrote to memory of 3552	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 4860 wrote to memory of 3552	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 4860 wrote to memory of 3552	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 4860 wrote to memory of 4296	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 4860 wrote to memory of 4296	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 4860 wrote to memory of 4296	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	cmd.exe
PID 4860 wrote to memory of 4340	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4340	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4340	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4748	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4748	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4748	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4680	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4680	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4680	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	sc.exe
PID 4860 wrote to memory of 4668	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	netsh.exe
PID 4860 wrote to memory of 4668	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	netsh.exe
PID 4860 wrote to memory of 4668	4860	afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe	netsh.exe
PID 4596 wrote to memory of 4004	4596	ctbzjelz.exe	svchost.exe
PID 4596 wrote to memory of 4004	4596	ctbzjelz.exe	svchost.exe
PID 4596 wrote to memory of 4004	4596	ctbzjelz.exe	svchost.exe
PID 4596 wrote to memory of 4004	4596	ctbzjelz.exe	svchost.exe
PID 4596 wrote to memory of 4004	4596	ctbzjelz.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe
"C:\Users\Admin\AppData\Local\Temp\afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jdcrpfac\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3552
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ctbzjelz.exe" C:\Windows\SysWOW64\jdcrpfac\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4296
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create jdcrpfac binPath= "C:\Windows\SysWOW64\jdcrpfac\ctbzjelz.exe /d\"C:\Users\Admin\AppData\Local\Temp\afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4340
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description jdcrpfac "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4748
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start jdcrpfac
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4680
- 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:4668
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4860 -s 1040
  2⤵
  - Program crash
  PID:3520

C:\Windows\SysWOW64\jdcrpfac\ctbzjelz.exe
C:\Windows\SysWOW64\jdcrpfac\ctbzjelz.exe /d"C:\Users\Admin\AppData\Local\Temp\afac4eb9d79efcd0395d59351bdef0776b852ea337601cfbd9a79da3a1fad6b2.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4596
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4004
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4596 -s 516
  2⤵
  - Program crash
  PID:3176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4860 -ip 4860
1⤵
PID:1324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4596 -ip 4596
1⤵
PID:2696

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

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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\ctbzjelz.exe

Filesize
14.4MB

MD5
34440ac261c677687b2ba6d2e7ebf012

SHA1
b4927e2c51eea0f2ab0217ffc8d92468a58758fe

SHA256
af734d2be0cf7226ab7b78a1abd1cfffcfc06fc75c6c452cbd16d9cafcb8e60a

SHA512
eeb4dcb28bca0e46603e99f1350f158937f8ae96fffea381d4293a4f002f82323c16353b71b874c5cd98f373ae4580d0f85564ec0c68e9fd3027999e864f95ca

Download Submit
memory/4004-15-0x0000000000AA0000-0x0000000000AB5000-memory.dmp

Filesize
84KB

Download
memory/4004-13-0x0000000000AA0000-0x0000000000AB5000-memory.dmp

Filesize
84KB

Download
memory/4004-16-0x0000000000AA0000-0x0000000000AB5000-memory.dmp

Filesize
84KB

Download
memory/4596-12-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/4596-11-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/4596-18-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/4860-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4860-2-0x00000000008B0000-0x00000000008C3000-memory.dmp

Filesize
76KB

Download
memory/4860-7-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/4860-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4860-8-0x00000000008B0000-0x00000000008C3000-memory.dmp

Filesize
76KB

Download
memory/4860-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads