tofsee | 588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a

General

Target

588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe
Size

14.7MB
MD5

336993cb022096f6ec4044cadb51676a
SHA1

6fa127155546efc0deb7eefdf2e34f1f262c96b3
SHA256

588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a
SHA512

4c7b4f0a3dca13badc86f5d31ced92a85cea244a196bbeff2840e3e036bd6aa51b28adee8bdb07aee4b9d945353a6a295e5863ac922c6a37d7a0efd428818c86
SSDEEP

3072:FEtETlIcJpeAXch6LLTjjdQ4TdcUaOE9HBMwu6Z6O3Q7mKte7111111111111111:UEPX86zdndcfrHBgXfmKte

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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

pid	Process
4092	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\satnmnrp\ImagePath = "C:\\Windows\\SysWOW64\\satnmnrp\\cjmhgaau.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe

Deletes itself 1 IoCs

pid	Process
4116	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4316	cjmhgaau.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4316 set thread context of 4116	4316	cjmhgaau.exe	95

Launches sc.exe 3 IoCs

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

pid	Process
3088	sc.exe
2344	sc.exe
1940	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	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cjmhgaau.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1008 wrote to memory of 2728	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	82
PID 1008 wrote to memory of 2728	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	82
PID 1008 wrote to memory of 2728	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	82
PID 1008 wrote to memory of 264	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	84
PID 1008 wrote to memory of 264	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	84
PID 1008 wrote to memory of 264	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	84
PID 1008 wrote to memory of 3088	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	86
PID 1008 wrote to memory of 3088	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	86
PID 1008 wrote to memory of 3088	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	86
PID 1008 wrote to memory of 2344	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	88
PID 1008 wrote to memory of 2344	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	88
PID 1008 wrote to memory of 2344	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	88
PID 1008 wrote to memory of 1940	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	90
PID 1008 wrote to memory of 1940	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	90
PID 1008 wrote to memory of 1940	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	90
PID 1008 wrote to memory of 4092	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	93
PID 1008 wrote to memory of 4092	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	93
PID 1008 wrote to memory of 4092	1008	588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe	93
PID 4316 wrote to memory of 4116	4316	cjmhgaau.exe	95
PID 4316 wrote to memory of 4116	4316	cjmhgaau.exe	95
PID 4316 wrote to memory of 4116	4316	cjmhgaau.exe	95
PID 4316 wrote to memory of 4116	4316	cjmhgaau.exe	95
PID 4316 wrote to memory of 4116	4316	cjmhgaau.exe	95

C:\Users\Admin\AppData\Local\Temp\588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe
"C:\Users\Admin\AppData\Local\Temp\588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\satnmnrp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2728
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cjmhgaau.exe" C:\Windows\SysWOW64\satnmnrp\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:264
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create satnmnrp binPath= "C:\Windows\SysWOW64\satnmnrp\cjmhgaau.exe /d\"C:\Users\Admin\AppData\Local\Temp\588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3088
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description satnmnrp "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2344
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start satnmnrp
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1940
- 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:4092

C:\Windows\SysWOW64\satnmnrp\cjmhgaau.exe
C:\Windows\SysWOW64\satnmnrp\cjmhgaau.exe /d"C:\Users\Admin\AppData\Local\Temp\588c821f2829f6edb8188876d4a91648d3abd76cfa73d406d4d43e8f164dd36a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4316
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4116

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\cjmhgaau.exe

Filesize
13.1MB

MD5
59aa46b3a4d83894806a5a6d14938d6f

SHA1
de15c020203ea8d9b7bc4140329ed9b1f27832b0

SHA256
ae2e3c0a0187db76c8eed641d59b86c57e060903b4c7be5d8c0f233761eac365

SHA512
d3b92ae3b5bceaa27488cad7d12fce7b4acf742b8a0d60eb1f2d7e16fdcaaefa534db3754d1373f35f792721c20cee167978b2a3c52dd0c974dbebd4b677df5a

Download Submit
memory/1008-1-0x0000000002E80000-0x0000000002F80000-memory.dmp

Filesize
1024KB

Download
memory/1008-2-0x0000000002CA0000-0x0000000002CB3000-memory.dmp

Filesize
76KB

Download
memory/1008-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1008-9-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1008-8-0x0000000002CA0000-0x0000000002CB3000-memory.dmp

Filesize
76KB

Download
memory/1008-7-0x0000000000400000-0x0000000002B4A000-memory.dmp

Filesize
39.3MB

Download
memory/4116-11-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/4116-14-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/4116-15-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/4316-13-0x0000000000400000-0x0000000002B4A000-memory.dmp

Filesize
39.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads