tofsee | 99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8

General

Target

99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe
Size

10.2MB
MD5

0f729848b7866ea716612093fa2440ba
SHA1

2678bfe618cc4ef9a7badd7ca789c805215cb2b9
SHA256

99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8
SHA512

56d3fba9f75645c105c3b78d5b6fb4a721aaabcda4521738caf1d6f2df144f418c5ed71f5f2ffbd4bfba4f368f884bf4bca1e273859f50a0868e479443845b79
SSDEEP

1536:PpUJsMq8nDNrnUtvDqJ55fNBVcmiCxmeZUUfOxxjDRvgdi0/z/jHNq8wR4vyKT:/6nlnZX17rpLfOz3t8FLti4v

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

103.248.137.133

59.188.74.26

115.230.124.76

111.121.193.242

Signatures

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

pid	Process
4896	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\mafhmnz\ImagePath = "C:\\Windows\\SysWOW64\\mafhmnz\\gdwlpnpv.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\International\Geo\Nation	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe

Deletes itself 1 IoCs

pid	Process
1640	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
116	gdwlpnpv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 116 set thread context of 1640	116	gdwlpnpv.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
3168	sc.exe
3424	sc.exe
1856	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	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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gdwlpnpv.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 1092	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	86
PID 2420 wrote to memory of 1092	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	86
PID 2420 wrote to memory of 1092	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	86
PID 2420 wrote to memory of 3900	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	88
PID 2420 wrote to memory of 3900	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	88
PID 2420 wrote to memory of 3900	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	88
PID 2420 wrote to memory of 3424	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	90
PID 2420 wrote to memory of 3424	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	90
PID 2420 wrote to memory of 3424	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	90
PID 2420 wrote to memory of 1856	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	93
PID 2420 wrote to memory of 1856	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	93
PID 2420 wrote to memory of 1856	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	93
PID 2420 wrote to memory of 3168	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	97
PID 2420 wrote to memory of 3168	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	97
PID 2420 wrote to memory of 3168	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	97
PID 2420 wrote to memory of 4896	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	100
PID 2420 wrote to memory of 4896	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	100
PID 2420 wrote to memory of 4896	2420	99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe	100
PID 116 wrote to memory of 1640	116	gdwlpnpv.exe	104
PID 116 wrote to memory of 1640	116	gdwlpnpv.exe	104
PID 116 wrote to memory of 1640	116	gdwlpnpv.exe	104
PID 116 wrote to memory of 1640	116	gdwlpnpv.exe	104
PID 116 wrote to memory of 1640	116	gdwlpnpv.exe	104

C:\Users\Admin\AppData\Local\Temp\99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe
"C:\Users\Admin\AppData\Local\Temp\99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mafhmnz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gdwlpnpv.exe" C:\Windows\SysWOW64\mafhmnz\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create mafhmnz binPath= "C:\Windows\SysWOW64\mafhmnz\gdwlpnpv.exe /d\"C:\Users\Admin\AppData\Local\Temp\99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe\"" type= own start= auto DisplayName= "P2P Support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3424
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description mafhmnz "Internet Mobile Support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1856
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start mafhmnz
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3168
- 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:4896

C:\Windows\SysWOW64\mafhmnz\gdwlpnpv.exe
C:\Windows\SysWOW64\mafhmnz\gdwlpnpv.exe /d"C:\Users\Admin\AppData\Local\Temp\99a3f13c5a445eed6c7430d63a8865bf79d29635900e9fac1d9a2d24db1c2df8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:116
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1640

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\gdwlpnpv.exe

Filesize
12.4MB

MD5
93b4431f39d9d9f3d2e0bbaf9b93edd7

SHA1
0c324738a7672e4b544a6b648a208acab496adbd

SHA256
81fc31fe27246e6d240b614084b950d85f8e37a9fbea0e29eba62c3c52f6804d

SHA512
dab0d31b74abc3f8237ae6cd77dc77ee67ffb8840dd7ada6655bdd5786f1180ccec240c04781ba370eba1ca2fad0e6ca2294aaff28df136dfc681ad278f380d6

Download Submit
memory/116-7-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/116-13-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1640-11-0x0000000000370000-0x0000000000386000-memory.dmp

Filesize
88KB

Download
memory/1640-14-0x0000000000370000-0x0000000000386000-memory.dmp

Filesize
88KB

Download
memory/1640-15-0x0000000000370000-0x0000000000386000-memory.dmp

Filesize
88KB

Download
memory/1640-16-0x0000000000370000-0x0000000000386000-memory.dmp

Filesize
88KB

Download
memory/2420-0-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2420-1-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2420-3-0x00000000004D0000-0x00000000004D1000-memory.dmp

Filesize
4KB

Download
memory/2420-2-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2420-9-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads