tofsee | 074ed6a310e79810c61522ca461946df52434ab70bfb9a20678ada618a822acc

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/03/2024, 12:05

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
e1a05d95531273c66fb3b520de465d17.exe
Size 12.7MB
Sample240327-n9fg8sbf59
SHA256 074ed6a310e79810c61522ca461946df52434ab70bfb9a20678ada618a822acc
MD5 e1a05d95531273c66fb3b520de465d17
SHA1 8d254a770b88f877e4935e93a880caaa839f6adf
SHA512 96d365d747046f9511d04a320bc5766af35519f3e37219111efb8f51d518b34654ab11a35606f636d55a599d06247b85d6b381fe171582eb38af7c866551c0f1
SSDEEP 49152:wp42RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR5:w
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 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1312	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\iyrqmrxy\ImagePath = "C:\\Windows\\SysWOW64\\iyrqmrxy\\oxnbcqfl.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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	e1a05d95531273c66fb3b520de465d17.exe

Deletes itself 1 IoCs

pid	Process
3224	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3308	oxnbcqfl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3308 set thread context of 3224	3308	oxnbcqfl.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
2092	sc.exe
1944	sc.exe
4084	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
1000	4876	WerFault.exe	87
2528	3308	WerFault.exe	102

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 5016	4876	e1a05d95531273c66fb3b520de465d17.exe	92
PID 4876 wrote to memory of 5016	4876	e1a05d95531273c66fb3b520de465d17.exe	92
PID 4876 wrote to memory of 5016	4876	e1a05d95531273c66fb3b520de465d17.exe	92
PID 4876 wrote to memory of 2196	4876	e1a05d95531273c66fb3b520de465d17.exe	94
PID 4876 wrote to memory of 2196	4876	e1a05d95531273c66fb3b520de465d17.exe	94
PID 4876 wrote to memory of 2196	4876	e1a05d95531273c66fb3b520de465d17.exe	94
PID 4876 wrote to memory of 2092	4876	e1a05d95531273c66fb3b520de465d17.exe	96
PID 4876 wrote to memory of 2092	4876	e1a05d95531273c66fb3b520de465d17.exe	96
PID 4876 wrote to memory of 2092	4876	e1a05d95531273c66fb3b520de465d17.exe	96
PID 4876 wrote to memory of 1944	4876	e1a05d95531273c66fb3b520de465d17.exe	98
PID 4876 wrote to memory of 1944	4876	e1a05d95531273c66fb3b520de465d17.exe	98
PID 4876 wrote to memory of 1944	4876	e1a05d95531273c66fb3b520de465d17.exe	98
PID 4876 wrote to memory of 4084	4876	e1a05d95531273c66fb3b520de465d17.exe	100
PID 4876 wrote to memory of 4084	4876	e1a05d95531273c66fb3b520de465d17.exe	100
PID 4876 wrote to memory of 4084	4876	e1a05d95531273c66fb3b520de465d17.exe	100
PID 4876 wrote to memory of 1312	4876	e1a05d95531273c66fb3b520de465d17.exe	103
PID 4876 wrote to memory of 1312	4876	e1a05d95531273c66fb3b520de465d17.exe	103
PID 4876 wrote to memory of 1312	4876	e1a05d95531273c66fb3b520de465d17.exe	103
PID 3308 wrote to memory of 3224	3308	oxnbcqfl.exe	108
PID 3308 wrote to memory of 3224	3308	oxnbcqfl.exe	108
PID 3308 wrote to memory of 3224	3308	oxnbcqfl.exe	108
PID 3308 wrote to memory of 3224	3308	oxnbcqfl.exe	108
PID 3308 wrote to memory of 3224	3308	oxnbcqfl.exe	108

C:\Users\Admin\AppData\Local\Temp\e1a05d95531273c66fb3b520de465d17.exe
"C:\Users\Admin\AppData\Local\Temp\e1a05d95531273c66fb3b520de465d17.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iyrqmrxy\
  2⤵
  PID:5016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oxnbcqfl.exe" C:\Windows\SysWOW64\iyrqmrxy\
  2⤵
  PID:2196
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create iyrqmrxy binPath= "C:\Windows\SysWOW64\iyrqmrxy\oxnbcqfl.exe /d\"C:\Users\Admin\AppData\Local\Temp\e1a05d95531273c66fb3b520de465d17.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2092
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description iyrqmrxy "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1944
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start iyrqmrxy
  2⤵
  - Launches sc.exe
  PID:4084
- 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:1312
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4876 -s 1036
  2⤵
  - Program crash
  PID:1000

C:\Windows\SysWOW64\iyrqmrxy\oxnbcqfl.exe
C:\Windows\SysWOW64\iyrqmrxy\oxnbcqfl.exe /d"C:\Users\Admin\AppData\Local\Temp\e1a05d95531273c66fb3b520de465d17.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3308
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3224
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3308 -s 512
  2⤵
  - Program crash
  PID:2528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4876 -ip 4876
1⤵
PID:4132

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 3308 -ip 3308
1⤵
PID:2168

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

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

oxnbcqfl.exe

Path C:\Users\Admin\AppData\Local\Temp\oxnbcqfl.exe
Size 1.3MB
SHA256 b57eda1913e7efda36007917b38ffae7119a3655e9355ca06870678411b96c21
MD5 cef3a8e78afdf7f6ac8363e70e15db9f
SHA1 bca73e096c3428fa84e884042def8b2fe456830e
SHA512 c7c1d0ddf8544fa4d5e1708f45cbc17d0cfc0a41e8f64e5e8a397213e535386644418a218768b5048c141f45cd9debe4a16ee860f24dba580dcfbe8928c7a982
SSDEEP 24576:+lp4JoSoSoSoSoSoSoSoSoSoSoSoSoSoSoSoSoSop:ap42RRRRRRRRRRRRRRRRRp
MD5 SHA1 SHA512 SSDEEP

Submit Download

oxnbcqfl.exe

Path C:\Windows\SysWOW64\iyrqmrxy\oxnbcqfl.exe
Size 4.2MB
SHA256 62ab9f42319a1b5b92541d9751c181d126758b77f34f5573bc1567070abc6d8d
MD5 269920c89049757a4bff2b21a05e6f7e
SHA1 7027017b9e75602d4f5ba45ac6fdc765054f6b6e
SHA512 3a8c1e50251454207757f73e9a7cd6002e1e77e5cb09ba68173ac39b8b154f709630ce7dd23f8767cc910a730a4a20dc23dc385ad50dda8110fcf4af663a4988
SSDEEP 49152:ap42RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRi:ao
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3224-11-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Download

memory/3224-19-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Download

memory/3224-17-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Download

memory/3224-16-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Download

memory/3308-14-0x0000000000400000-0x0000000002CC0000-memory.dmp

Download

memory/3308-10-0x0000000002E00000-0x0000000002F00000-memory.dmp

Download

memory/3308-18-0x0000000000400000-0x0000000002CC0000-memory.dmp

Download

memory/4876-9-0x0000000002D30000-0x0000000002D43000-memory.dmp

Download

memory/4876-1-0x0000000002F20000-0x0000000003020000-memory.dmp

Download

memory/4876-8-0x0000000000400000-0x0000000002CC0000-memory.dmp

Download

memory/4876-4-0x0000000000400000-0x0000000002CC0000-memory.dmp

Download

memory/4876-2-0x0000000002D30000-0x0000000002D43000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads