tofsee | 15ea9633ebefcd0ff1de7ca53915f940e98fde85c3621124f3798dabb80b04ba

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2023, 22:05

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General

Target
0525c45598e788b467687fdd0685f3ec.exe
Size 13.3MB
Sample231229-1zzvcaafgn
SHA256 15ea9633ebefcd0ff1de7ca53915f940e98fde85c3621124f3798dabb80b04ba
MD5 0525c45598e788b467687fdd0685f3ec
SHA1 c2c4efb76132fe3f05623be05b3af41beade3e63
SHA512 ed0e262e809fb61d706222113283b53c4c03edf181b245a08f2934658feeb19360ae3a951e0e347e341b5c1abb729cf2f097e711ea7e4e9f4fc3e22f5c8d16f9
SSDEEP 24576:TjDuKnh7YzbKBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBp:Tnh
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
3252	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\yllmrlv\ImagePath = "C:\\Windows\\SysWOW64\\yllmrlv\\vqfpuzrp.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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	0525c45598e788b467687fdd0685f3ec.exe

Executes dropped EXE 1 IoCs

pid	Process
4516	vqfpuzrp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4516 set thread context of 4128	4516	vqfpuzrp.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
4080	sc.exe
1796	sc.exe
1888	sc.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4016 wrote to memory of 1224	4016	0525c45598e788b467687fdd0685f3ec.exe	93
PID 4016 wrote to memory of 1224	4016	0525c45598e788b467687fdd0685f3ec.exe	93
PID 4016 wrote to memory of 1224	4016	0525c45598e788b467687fdd0685f3ec.exe	93
PID 4016 wrote to memory of 2916	4016	0525c45598e788b467687fdd0685f3ec.exe	95
PID 4016 wrote to memory of 2916	4016	0525c45598e788b467687fdd0685f3ec.exe	95
PID 4016 wrote to memory of 2916	4016	0525c45598e788b467687fdd0685f3ec.exe	95
PID 4016 wrote to memory of 4080	4016	0525c45598e788b467687fdd0685f3ec.exe	97
PID 4016 wrote to memory of 4080	4016	0525c45598e788b467687fdd0685f3ec.exe	97
PID 4016 wrote to memory of 4080	4016	0525c45598e788b467687fdd0685f3ec.exe	97
PID 4016 wrote to memory of 1796	4016	0525c45598e788b467687fdd0685f3ec.exe	98
PID 4016 wrote to memory of 1796	4016	0525c45598e788b467687fdd0685f3ec.exe	98
PID 4016 wrote to memory of 1796	4016	0525c45598e788b467687fdd0685f3ec.exe	98
PID 4016 wrote to memory of 1888	4016	0525c45598e788b467687fdd0685f3ec.exe	101
PID 4016 wrote to memory of 1888	4016	0525c45598e788b467687fdd0685f3ec.exe	101
PID 4016 wrote to memory of 1888	4016	0525c45598e788b467687fdd0685f3ec.exe	101
PID 4016 wrote to memory of 3252	4016	0525c45598e788b467687fdd0685f3ec.exe	103
PID 4016 wrote to memory of 3252	4016	0525c45598e788b467687fdd0685f3ec.exe	103
PID 4016 wrote to memory of 3252	4016	0525c45598e788b467687fdd0685f3ec.exe	103
PID 4516 wrote to memory of 4128	4516	vqfpuzrp.exe	105
PID 4516 wrote to memory of 4128	4516	vqfpuzrp.exe	105
PID 4516 wrote to memory of 4128	4516	vqfpuzrp.exe	105
PID 4516 wrote to memory of 4128	4516	vqfpuzrp.exe	105
PID 4516 wrote to memory of 4128	4516	vqfpuzrp.exe	105

C:\Users\Admin\AppData\Local\Temp\0525c45598e788b467687fdd0685f3ec.exe
"C:\Users\Admin\AppData\Local\Temp\0525c45598e788b467687fdd0685f3ec.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yllmrlv\
  2⤵
  PID:1224
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vqfpuzrp.exe" C:\Windows\SysWOW64\yllmrlv\
  2⤵
  PID:2916
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yllmrlv binPath= "C:\Windows\SysWOW64\yllmrlv\vqfpuzrp.exe /d\"C:\Users\Admin\AppData\Local\Temp\0525c45598e788b467687fdd0685f3ec.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yllmrlv "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1796
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yllmrlv
  2⤵
  - Launches sc.exe
  PID:1888
- 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:3252

C:\Windows\SysWOW64\yllmrlv\vqfpuzrp.exe
C:\Windows\SysWOW64\yllmrlv\vqfpuzrp.exe /d"C:\Users\Admin\AppData\Local\Temp\0525c45598e788b467687fdd0685f3ec.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4516
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:4128

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

vqfpuzrp.exe

Path C:\Users\Admin\AppData\Local\Temp\vqfpuzrp.exe
Size 93KB
SHA256 3002e954facfcfbb0d1d1bf380d07f8898ad21674b4768dcfc9805f08892a154
MD5 4229040a832da95ad9526750d51fd7c3
SHA1 dfdf10d2cb4a796f5e52633e055872409cb21792
SHA512 fc357947f0eebd50ca0af4440188308e186cd5e1dbda0217551b7c62d8aeb79d8c242dcf4fdc668248e60294239fabd4ebc9c1ca6433f8055a560f3b430219d3
SSDEEP 1536:nbAyPv1zX7nFJOauYESfUbLU7w9GB5seEuKo8S33vj+mILTsS7YpuigkiN:nbAyPNPpuEfaLUQGB5xEuKG37DIPsPuD
MD5 SHA1 SHA512 SSDEEP

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memory/4016-14-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4016-3-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4016-1-0x0000000000580000-0x0000000000680000-memory.dmp

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memory/4016-23-0x0000000000580000-0x0000000000680000-memory.dmp

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memory/4016-2-0x0000000000540000-0x0000000000553000-memory.dmp

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memory/4128-15-0x0000000000D90000-0x0000000000DA5000-memory.dmp

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memory/4128-13-0x0000000000D90000-0x0000000000DA5000-memory.dmp

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memory/4128-10-0x0000000000D90000-0x0000000000DA5000-memory.dmp

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memory/4128-16-0x0000000000D90000-0x0000000000DA5000-memory.dmp

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memory/4128-25-0x0000000000D90000-0x0000000000DA5000-memory.dmp

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memory/4516-9-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4516-17-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4516-21-0x0000000000D30000-0x0000000000D43000-memory.dmp

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memory/4516-8-0x0000000000690000-0x0000000000790000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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