tofsee | 3799d9bdef68c2a7a47a2e6c0b73e804a09841c9b8f1a4ff433a1ea9ca69c217

General

Target

da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe
Size

185KB
MD5

491f10bcc9d547a9816a6e3147368a5f
SHA1

f36a1451152c3be82e38efbc6dfdb71ec7f0942f
SHA256

da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f
SHA512

566705814c5cb0631e5d3556a8380c317099f66d76a1ef4fccbe3712994314df453c41e8ad7b1fff2b8b1063c3f87d73853231a930f44fe0102cea8b44c83961
SSDEEP

3072:2Fg4HIK9Pilrss8ix9RJaMi4jrW/fTVUWNm+GIAsVBylcku:2F3rRjs5x9Rdji/fTVvPNVIl

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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

pid	Process
1020	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\nmbdivia\ImagePath = "C:\\Windows\\SysWOW64\\nmbdivia\\licdaiyf.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe

Executes dropped EXE 1 IoCs

pid	Process
3112	licdaiyf.exe

Drops file in System32 directory 1 IoCs

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3112 set thread context of 1540	3112	licdaiyf.exe	97

Launches sc.exe 3 IoCs

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

pid	Process
100	sc.exe
1408	sc.exe
2444	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3996	3768	WerFault.exe	79
3492	3112	WerFault.exe	95

Modifies data under HKEY_USERS 2 IoCs

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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3768 wrote to memory of 1528	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	82
PID 3768 wrote to memory of 1528	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	82
PID 3768 wrote to memory of 1528	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	82
PID 3768 wrote to memory of 3172	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	84
PID 3768 wrote to memory of 3172	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	84
PID 3768 wrote to memory of 3172	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	84
PID 3768 wrote to memory of 100	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	86
PID 3768 wrote to memory of 100	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	86
PID 3768 wrote to memory of 100	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	86
PID 3768 wrote to memory of 1408	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	88
PID 3768 wrote to memory of 1408	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	88
PID 3768 wrote to memory of 1408	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	88
PID 3768 wrote to memory of 2444	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	90
PID 3768 wrote to memory of 2444	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	90
PID 3768 wrote to memory of 2444	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	90
PID 3768 wrote to memory of 1020	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	92
PID 3768 wrote to memory of 1020	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	92
PID 3768 wrote to memory of 1020	3768	da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe	92
PID 3112 wrote to memory of 1540	3112	licdaiyf.exe	97
PID 3112 wrote to memory of 1540	3112	licdaiyf.exe	97
PID 3112 wrote to memory of 1540	3112	licdaiyf.exe	97
PID 3112 wrote to memory of 1540	3112	licdaiyf.exe	97
PID 3112 wrote to memory of 1540	3112	licdaiyf.exe	97

C:\Users\Admin\AppData\Local\Temp\da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe
"C:\Users\Admin\AppData\Local\Temp\da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nmbdivia\
  2⤵
  PID:1528
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\licdaiyf.exe" C:\Windows\SysWOW64\nmbdivia\
  2⤵
  PID:3172
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nmbdivia binPath= "C:\Windows\SysWOW64\nmbdivia\licdaiyf.exe /d\"C:\Users\Admin\AppData\Local\Temp\da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:100
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nmbdivia "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1408
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nmbdivia
  2⤵
  - Launches sc.exe
  PID:2444
- 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:1020
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3768 -s 1208
  2⤵
  - Program crash
  PID:3996

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3768 -ip 3768
1⤵
PID:2812

C:\Windows\SysWOW64\nmbdivia\licdaiyf.exe
C:\Windows\SysWOW64\nmbdivia\licdaiyf.exe /d"C:\Users\Admin\AppData\Local\Temp\da9e1000fee01c6781ed0a7e5202d1445e734ae5ac39fbb3af2d0a272451731f.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3112
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:1540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3112 -s 560
  2⤵
  - Program crash
  PID:3492

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3112 -ip 3112
1⤵
PID:3076

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\licdaiyf.exe

Filesize
13.3MB

MD5
b61a4a32b14729da4cd8fa1bc5250246

SHA1
d2caef2bfa92e7a78c63bdf877ea58acb5409b98

SHA256
7da6ccde241a4bc410ebed1cc2b687e956975a16067c05945ea8ffa683ccb489

SHA512
5f65d6daf1fa5fd65a1e19ce6de9b0f8492da06286f50e3cc71a4da7ce12aea87bafb20fc54791b5e364622f0113cbd1d6b8c32077e9e925e76bc0c686745133

Download Submit
C:\Windows\SysWOW64\nmbdivia\licdaiyf.exe

Filesize
13.3MB

MD5
b61a4a32b14729da4cd8fa1bc5250246

SHA1
d2caef2bfa92e7a78c63bdf877ea58acb5409b98

SHA256
7da6ccde241a4bc410ebed1cc2b687e956975a16067c05945ea8ffa683ccb489

SHA512
5f65d6daf1fa5fd65a1e19ce6de9b0f8492da06286f50e3cc71a4da7ce12aea87bafb20fc54791b5e364622f0113cbd1d6b8c32077e9e925e76bc0c686745133

Download Submit
memory/100-138-0x0000000000000000-mapping.dmp

Download
memory/1020-141-0x0000000000000000-mapping.dmp

Download
memory/1408-139-0x0000000000000000-mapping.dmp

Download
memory/1528-135-0x0000000000000000-mapping.dmp

Download
memory/1540-153-0x0000000001230000-0x0000000001245000-memory.dmp

Filesize
84KB

Download
memory/1540-147-0x0000000000000000-mapping.dmp

Download
memory/1540-152-0x0000000001230000-0x0000000001245000-memory.dmp

Filesize
84KB

Download
memory/1540-148-0x0000000001230000-0x0000000001245000-memory.dmp

Filesize
84KB

Download
memory/2444-140-0x0000000000000000-mapping.dmp

Download
memory/3112-145-0x00000000007A9000-0x00000000007BB000-memory.dmp

Filesize
72KB

Download
memory/3112-146-0x0000000000400000-0x000000000055E000-memory.dmp

Filesize
1.4MB

Download
memory/3112-151-0x0000000000400000-0x000000000055E000-memory.dmp

Filesize
1.4MB

Download
memory/3172-136-0x0000000000000000-mapping.dmp

Download
memory/3768-143-0x000000000060E000-0x0000000000621000-memory.dmp

Filesize
76KB

Download
memory/3768-133-0x00000000022C0000-0x00000000022D3000-memory.dmp

Filesize
76KB

Download
memory/3768-144-0x0000000000400000-0x000000000055E000-memory.dmp

Filesize
1.4MB

Download
memory/3768-134-0x0000000000400000-0x000000000055E000-memory.dmp

Filesize
1.4MB

Download
memory/3768-132-0x000000000060E000-0x0000000000621000-memory.dmp

Filesize
76KB

Download

Analysis

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