tofsee | 66f93e0301309aac2b38f3b904095162cb7c62591f22e8579074ce29cee69a9d

General

Target

36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe
Size

201KB
MD5

98f17302b4e156486845c83ad422c6aa
SHA1

83ffb44c4843b0ca414450644623897b1ffaed09
SHA256

36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1
SHA512

660e78e8419e16d74b2f7a527608f14a071e2d69f8b260090ce943b3d05d6113ec67e7a698bdea17ee0431a68ce9830d28398813cb520cacd8f77950d61582a5
SSDEEP

3072:HiGTXJoDM4OArNhCqW53oPP/zRsMPVFuZmj8peC5OC7h6Bu4e:CU6o4OGNYoPP7zVF4mj8S0

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

New Service
T1050
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1552 netsh.exe

pid	process
1552	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ejnntzha\ImagePath = "C:\\Windows\\SysWOW64\\ejnntzha\\xedqyygk.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:

36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe

Executes dropped EXE 1 IoCs

Processes:

xedqyygk.exe

pid process

1836 xedqyygk.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

xedqyygk.exe

description pid process target process

PID 1836 set thread context of 1992 1836 xedqyygk.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

5056 sc.exe
4504 sc.exe
3864 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1836	xedqyygk.exe

description	pid	process	target process
PID 1836 set thread context of 1992	1836	xedqyygk.exe	svchost.exe

pid	process
5056	sc.exe
4504	sc.exe
3864	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
216	1344	WerFault.exe	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe
1848	1836	WerFault.exe	xedqyygk.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exexedqyygk.exe

description	pid	process	target process
PID 1344 wrote to memory of 2156	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	cmd.exe
PID 1344 wrote to memory of 2156	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	cmd.exe
PID 1344 wrote to memory of 2156	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	cmd.exe
PID 1344 wrote to memory of 4856	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	cmd.exe
PID 1344 wrote to memory of 4856	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	cmd.exe
PID 1344 wrote to memory of 4856	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	cmd.exe
PID 1344 wrote to memory of 5056	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 5056	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 5056	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 4504	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 4504	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 4504	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 3864	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 3864	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 3864	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	sc.exe
PID 1344 wrote to memory of 1552	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	netsh.exe
PID 1344 wrote to memory of 1552	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	netsh.exe
PID 1344 wrote to memory of 1552	1344	36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe	netsh.exe
PID 1836 wrote to memory of 1992	1836	xedqyygk.exe	svchost.exe
PID 1836 wrote to memory of 1992	1836	xedqyygk.exe	svchost.exe
PID 1836 wrote to memory of 1992	1836	xedqyygk.exe	svchost.exe
PID 1836 wrote to memory of 1992	1836	xedqyygk.exe	svchost.exe
PID 1836 wrote to memory of 1992	1836	xedqyygk.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe
"C:\Users\Admin\AppData\Local\Temp\36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1344
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ejnntzha\
  2⤵
  PID:2156
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xedqyygk.exe" C:\Windows\SysWOW64\ejnntzha\
  2⤵
  PID:4856
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ejnntzha binPath= "C:\Windows\SysWOW64\ejnntzha\xedqyygk.exe /d\"C:\Users\Admin\AppData\Local\Temp\36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:5056
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ejnntzha "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4504
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ejnntzha
  2⤵
  - Launches sc.exe
  PID:3864
- 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:1552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1344 -s 1044
  2⤵
  - Program crash
  PID:216

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1344 -ip 1344
1⤵
PID:4648

C:\Windows\SysWOW64\ejnntzha\xedqyygk.exe
C:\Windows\SysWOW64\ejnntzha\xedqyygk.exe /d"C:\Users\Admin\AppData\Local\Temp\36949fde2e1880e8c86de360f71c2302c67cd453840ffd43fc1288234f3c6aa1.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1836
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:1992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 508
  2⤵
  - Program crash
  PID:1848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1836 -ip 1836
1⤵
PID:3936

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
11.3MB

MD5
88f53cdcc5ef1c7731f0ff34cc150b2f

SHA1
030c30af0bc0347babffb59b12bd9723e301a3d4

SHA256
663b21fe1dc1ea7e3500bac1783d5890df61c910d55eeb93a52b1529fb140867

SHA512
f1100e570e88258cc60e355143bda13ac6533c92ba7ad009ae27208404b7b3d0ef023fd281856ce5626708f77d50ee58f44bc8fce4985531f858048e2aeee9d0

Download Submit
C:\Windows\SysWOW64\ejnntzha\xedqyygk.exe

Filesize
11.3MB

MD5
88f53cdcc5ef1c7731f0ff34cc150b2f

SHA1
030c30af0bc0347babffb59b12bd9723e301a3d4

SHA256
663b21fe1dc1ea7e3500bac1783d5890df61c910d55eeb93a52b1529fb140867

SHA512
f1100e570e88258cc60e355143bda13ac6533c92ba7ad009ae27208404b7b3d0ef023fd281856ce5626708f77d50ee58f44bc8fce4985531f858048e2aeee9d0

Download Submit
memory/1344-135-0x0000000000630000-0x0000000000643000-memory.dmp

Filesize
76KB

Download
memory/1344-139-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/1836-144-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/1992-140-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1992-143-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1992-145-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1992-146-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download
memory/1992-147-0x0000000000540000-0x0000000000555000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads