tofsee | bdd2690165b79faa7e2ed30d7dd85f5cfc681b44a08bb442a4fea2078fb0394b

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 03:46

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General

Target
0d662b2ddbfc17b911c68a158a85da5c.exe
Size 14.7MB
Sample231230-eb3enshcf6
SHA256 bdd2690165b79faa7e2ed30d7dd85f5cfc681b44a08bb442a4fea2078fb0394b
MD5 0d662b2ddbfc17b911c68a158a85da5c
SHA1 72665d36f7c833b45803c35f17f2aa8fe7de69e7
SHA512 3479778605b4b9111233e0d4390997dbd491457ad490da0b592a20b34f64e9b183dd200ddf9359cf415f306b195c120526d9c78eca5ac46471411f4e0913104e
SSDEEP 49152:l/2ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssY:l
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

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 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
1228	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\tykhchop\ImagePath = "C:\\Windows\\SysWOW64\\tykhchop\\fuhdpoht.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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	0d662b2ddbfc17b911c68a158a85da5c.exe

Deletes itself 1 IoCs

pid	Process
2376	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1760	fuhdpoht.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1760 set thread context of 2376	1760	fuhdpoht.exe	115

Launches sc.exe 3 IoCs

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

pid	Process
4020	sc.exe
1956	sc.exe
1080	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3520	2168	WerFault.exe	20
640	1760	WerFault.exe	103

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 3368	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	89
PID 2168 wrote to memory of 3368	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	89
PID 2168 wrote to memory of 3368	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	89
PID 2168 wrote to memory of 1192	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	96
PID 2168 wrote to memory of 1192	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	96
PID 2168 wrote to memory of 1192	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	96
PID 2168 wrote to memory of 4020	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	97
PID 2168 wrote to memory of 4020	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	97
PID 2168 wrote to memory of 4020	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	97
PID 2168 wrote to memory of 1956	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	100
PID 2168 wrote to memory of 1956	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	100
PID 2168 wrote to memory of 1956	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	100
PID 2168 wrote to memory of 1080	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	102
PID 2168 wrote to memory of 1080	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	102
PID 2168 wrote to memory of 1080	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	102
PID 2168 wrote to memory of 1228	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	108
PID 2168 wrote to memory of 1228	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	108
PID 2168 wrote to memory of 1228	2168	0d662b2ddbfc17b911c68a158a85da5c.exe	108
PID 1760 wrote to memory of 2376	1760	fuhdpoht.exe	115
PID 1760 wrote to memory of 2376	1760	fuhdpoht.exe	115
PID 1760 wrote to memory of 2376	1760	fuhdpoht.exe	115
PID 1760 wrote to memory of 2376	1760	fuhdpoht.exe	115
PID 1760 wrote to memory of 2376	1760	fuhdpoht.exe	115

C:\Users\Admin\AppData\Local\Temp\0d662b2ddbfc17b911c68a158a85da5c.exe
"C:\Users\Admin\AppData\Local\Temp\0d662b2ddbfc17b911c68a158a85da5c.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tykhchop\
  2⤵
  PID:3368
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fuhdpoht.exe" C:\Windows\SysWOW64\tykhchop\
  2⤵
  PID:1192
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tykhchop binPath= "C:\Windows\SysWOW64\tykhchop\fuhdpoht.exe /d\"C:\Users\Admin\AppData\Local\Temp\0d662b2ddbfc17b911c68a158a85da5c.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4020
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tykhchop "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1956
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tykhchop
  2⤵
  - Launches sc.exe
  PID:1080
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2168 -s 1040
  2⤵
  - Program crash
  PID:3520
- 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:1228

C:\Windows\SysWOW64\tykhchop\fuhdpoht.exe
C:\Windows\SysWOW64\tykhchop\fuhdpoht.exe /d"C:\Users\Admin\AppData\Local\Temp\0d662b2ddbfc17b911c68a158a85da5c.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1760 -s 520
  2⤵
  - Program crash
  PID:640
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2168 -ip 2168
1⤵
PID:1092

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1760 -ip 1760
1⤵
PID:4716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

fuhdpoht.exe

Path C:\Users\Admin\AppData\Local\Temp\fuhdpoht.exe
Size 92KB
SHA256 2a0643731248d106e904e69323bf45aa89be5aac81d3e571271da3381031499a
MD5 c46caf6ce37c4364e6751afa0dea1a12
SHA1 5e9cff77740561f5110dc0f83d9ec9e8b59093d9
SHA512 acf6ea303779d15bd1d2a24323fa734f7b2c20316779dbc037ea55fb24d900c9f3adad4731ccc5e7857783ec1fd30e4c7a6cdeb1d6af67a49344165a96432efc
SSDEEP 1536:4HDWxMALAiGLHqpRT7g5k8+MMnsq18EkOonwsIr9zcF/xiQpHfa2wG0/:BLAWpRgxXq1uOoJwzm/x9p/e/
MD5 SHA1 SHA512 SSDEEP

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fuhdpoht.exe

Path C:\Windows\SysWOW64\tykhchop\fuhdpoht.exe
Size 381KB
SHA256 daec1208930ea40db5768ec465d9fc87ee38ff824d87a0ac0616cba1a2a594a9
MD5 67c1fc8e16f3babe2c35df7ef9f77cc0
SHA1 a10dc748ed8381e6f4cf81e9edbe3b4edabe7c9d
SHA512 9ace0ece2be4978f8e40868eb8ee6c3ec243a5ab7d7a96800645017d762f4e47a70987cc8e6f473f9fc636fcacf4b5b83bda602eb74e8a80024ce88e0d37f75f
SSDEEP 6144:BLAWkq1/Tm/N2gFgFVg8FY6xAZgFgFVg8FY6xAZgFgX:B0Wkq1y2ga4fga4fgM
MD5 SHA1 SHA512 SSDEEP

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memory/1760-10-0x0000000001FF0000-0x00000000020F0000-memory.dmp

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memory/1760-15-0x0000000000400000-0x0000000001D85000-memory.dmp

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memory/2168-8-0x0000000000400000-0x0000000001D85000-memory.dmp

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memory/2168-9-0x0000000001F30000-0x0000000001F43000-memory.dmp

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memory/2168-2-0x0000000001F30000-0x0000000001F43000-memory.dmp

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memory/2168-4-0x0000000000400000-0x0000000001D85000-memory.dmp

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memory/2168-1-0x0000000001F50000-0x0000000002050000-memory.dmp

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memory/2376-11-0x0000000000350000-0x0000000000365000-memory.dmp

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memory/2376-16-0x0000000000350000-0x0000000000365000-memory.dmp

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memory/2376-17-0x0000000000350000-0x0000000000365000-memory.dmp

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memory/2376-14-0x0000000000350000-0x0000000000365000-memory.dmp

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memory/2376-19-0x0000000000350000-0x0000000000365000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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