tofsee | 26ebd2cf3cbee4dd5faa1f38c7b1ed58f352a7453ecbe962f95476c4c98a816e

General

Target

aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe
Size

256KB
MD5

11d6fdab8ce0a4462699d12d8cc6e181
SHA1

f79dd773636fb0c46346f08e9a36bea666e34350
SHA256

aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5
SHA512

dd582a962bc9d3c50782a528a1c635d065530b96f7e1325d0c254f299b10b29218a8626b15f18b11aaf234b7393cea39d8025fa8d023fa9e79bdbdce2d6478a6
SSDEEP

3072:DlrJL/wyRvNQG+FiOf5hqBNDo0Rpv01b8FbuW5hL4WeNH601:D3L/wUkFiOf5Ybon1gL4WeNa

Score

10^/10

tofsee evasion persistence 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
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

4072 netsh.exe

pid	process
4072	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\kbidoygb\ImagePath = "C:\\Windows\\SysWOW64\\kbidoygb\\auumpzdp.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:

aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1588 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

auumpzdp.exe

pid process

2056 auumpzdp.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

auumpzdp.exe

description pid process target process

PID 2056 set thread context of 1588 2056 auumpzdp.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

4464 sc.exe
2176 sc.exe
2548 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1588	svchost.exe

pid	process
2056	auumpzdp.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

description	pid	process	target process
PID 2056 set thread context of 1588	2056	auumpzdp.exe	svchost.exe

pid	process
4464	sc.exe
2176	sc.exe
2548	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
3704	4976	WerFault.exe	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe
3280	2056	WerFault.exe	auumpzdp.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 008dd63d637d0d0324edb47d450dd49d084297dce82e72baa4c0298aa5cf0d1d7ff8f2b180cd945d24edb47d470dd49d024195daf71261adc06d04fda6e22673bbc9154961cda5681cda854e7439e0ad644490bdb37c26e4935a05cff48d3c74bbc4103d29ffa46a15d5844b723ee19d084295d9e13f4bb4c06d00fdadfd5425dc99430e34ffad6a249ec60b1b79bdf0012dd98cb37b27e8905c0dcff58d387287cc186270a4f93824dc8145733ce7ad501ac5bd	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exeauumpzdp.exe

description	pid	process	target process
PID 4976 wrote to memory of 4828	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	cmd.exe
PID 4976 wrote to memory of 4828	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	cmd.exe
PID 4976 wrote to memory of 4828	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	cmd.exe
PID 4976 wrote to memory of 2324	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	cmd.exe
PID 4976 wrote to memory of 2324	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	cmd.exe
PID 4976 wrote to memory of 2324	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	cmd.exe
PID 4976 wrote to memory of 4464	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 4464	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 4464	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 2176	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 2176	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 2176	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 2548	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 2548	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 2548	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	sc.exe
PID 4976 wrote to memory of 4072	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	netsh.exe
PID 4976 wrote to memory of 4072	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	netsh.exe
PID 4976 wrote to memory of 4072	4976	aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe	netsh.exe
PID 2056 wrote to memory of 1588	2056	auumpzdp.exe	svchost.exe
PID 2056 wrote to memory of 1588	2056	auumpzdp.exe	svchost.exe
PID 2056 wrote to memory of 1588	2056	auumpzdp.exe	svchost.exe
PID 2056 wrote to memory of 1588	2056	auumpzdp.exe	svchost.exe
PID 2056 wrote to memory of 1588	2056	auumpzdp.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe
"C:\Users\Admin\AppData\Local\Temp\aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4976

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kbidoygb\
2⤵
PID:4828

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\auumpzdp.exe" C:\Windows\SysWOW64\kbidoygb\
2⤵
PID:2324

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create kbidoygb binPath= "C:\Windows\SysWOW64\kbidoygb\auumpzdp.exe /d\"C:\Users\Admin\AppData\Local\Temp\aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4464

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description kbidoygb "wifi internet conection"
2⤵
- Launches sc.exe
PID:2176

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start kbidoygb
2⤵
- Launches sc.exe
PID:2548

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
PID:4072

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4976 -s 804
2⤵
- Program crash
PID:3704

C:\Windows\SysWOW64\kbidoygb\auumpzdp.exe
C:\Windows\SysWOW64\kbidoygb\auumpzdp.exe /d"C:\Users\Admin\AppData\Local\Temp\aedba5939122af54e928bc355fbd3ffce10cc95f8d7efd007b8f9960d3c0cfe5.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2056

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2056 -s 536
2⤵
- Program crash
PID:3280

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4976 -ip 4976
1⤵
PID:3732

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2056 -ip 2056
1⤵
PID:2264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\auumpzdp.exe
Filesize
12.4MB

MD5
7755edc55bb6a4a76f565923c7780b28

SHA1
d1f16434bb79666d88db51cbce6d97c403afb63e

SHA256
2bcbca96bf8887bd9125a8f305dafaef11aef37a39b9fb047cd767a68b2dc01f

SHA512
9cf70110534371681cbf60ca53ad2010d4bacab0cf4c9383385ae10f22eaf04f0adfe57eee500a96ba66e002accf781f0496d25b7caa2629448170d1fd4867a1

Download Submit
memory/1588-12-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/1588-20-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/1588-18-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/1588-17-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/1588-16-0x0000000000A10000-0x0000000000A25000-memory.dmp

Filesize
84KB

Download
memory/2056-14-0x0000000000400000-0x0000000000862000-memory.dmp

Filesize
4.4MB

Download
memory/2056-11-0x0000000000B40000-0x0000000000C40000-memory.dmp

Filesize
1024KB

Download
memory/2056-19-0x0000000000400000-0x0000000000862000-memory.dmp

Filesize
4.4MB

Download
memory/4976-9-0x0000000000400000-0x0000000000862000-memory.dmp

Filesize
4.4MB

Download
memory/4976-1-0x00000000008A0000-0x00000000009A0000-memory.dmp

Filesize
1024KB

Download
memory/4976-10-0x00000000025B0000-0x00000000025C3000-memory.dmp

Filesize
76KB

Download
memory/4976-6-0x0000000000400000-0x0000000000862000-memory.dmp

Filesize
4.4MB

Download
memory/4976-4-0x0000000000400000-0x0000000000862000-memory.dmp

Filesize
4.4MB

Download
memory/4976-2-0x00000000025B0000-0x00000000025C3000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads