tofsee | 5af7f7900b0f1292abceffd9d9b24b366984267d70470d8ff8592e6363693f59

Analysis

max time kernel
250s
max time network
281s
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, 20:36

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General

Target
0351de358f0827eb3a2a66bb5fb81425.exe
Size 10.2MB
Sample231229-zds91aghe6
SHA256 5af7f7900b0f1292abceffd9d9b24b366984267d70470d8ff8592e6363693f59
MD5 0351de358f0827eb3a2a66bb5fb81425
SHA1 c36c96e006623983d5dc29e2b36ad8c250f96ecc
SHA512 24c68461dfb483cb91825962d2131b86ae17d90ce89a9bf6220c570f48725fae4a02083445018aba9a81db7654241f1c3b3039df772659df421436839081b833
SSDEEP 24576:DT8rgnPp+RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR:9p+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6
lazystax.ru

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
2176	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\mwzzvgmf\ImagePath = "C:\\Windows\\SysWOW64\\mwzzvgmf\\tqnlxixl.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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	0351de358f0827eb3a2a66bb5fb81425.exe

Deletes itself 1 IoCs

pid	Process
2088	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3628	tqnlxixl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3628 set thread context of 2088	3628	tqnlxixl.exe	110

Launches sc.exe 3 IoCs

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

pid	Process
4660	sc.exe
1132	sc.exe
2720	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 3620 wrote to memory of 2288	3620	0351de358f0827eb3a2a66bb5fb81425.exe	95
PID 3620 wrote to memory of 2288	3620	0351de358f0827eb3a2a66bb5fb81425.exe	95
PID 3620 wrote to memory of 2288	3620	0351de358f0827eb3a2a66bb5fb81425.exe	95
PID 3620 wrote to memory of 372	3620	0351de358f0827eb3a2a66bb5fb81425.exe	97
PID 3620 wrote to memory of 372	3620	0351de358f0827eb3a2a66bb5fb81425.exe	97
PID 3620 wrote to memory of 372	3620	0351de358f0827eb3a2a66bb5fb81425.exe	97
PID 3620 wrote to memory of 4660	3620	0351de358f0827eb3a2a66bb5fb81425.exe	99
PID 3620 wrote to memory of 4660	3620	0351de358f0827eb3a2a66bb5fb81425.exe	99
PID 3620 wrote to memory of 4660	3620	0351de358f0827eb3a2a66bb5fb81425.exe	99
PID 3620 wrote to memory of 1132	3620	0351de358f0827eb3a2a66bb5fb81425.exe	101
PID 3620 wrote to memory of 1132	3620	0351de358f0827eb3a2a66bb5fb81425.exe	101
PID 3620 wrote to memory of 1132	3620	0351de358f0827eb3a2a66bb5fb81425.exe	101
PID 3620 wrote to memory of 2720	3620	0351de358f0827eb3a2a66bb5fb81425.exe	104
PID 3620 wrote to memory of 2720	3620	0351de358f0827eb3a2a66bb5fb81425.exe	104
PID 3620 wrote to memory of 2720	3620	0351de358f0827eb3a2a66bb5fb81425.exe	104
PID 3620 wrote to memory of 2176	3620	0351de358f0827eb3a2a66bb5fb81425.exe	106
PID 3620 wrote to memory of 2176	3620	0351de358f0827eb3a2a66bb5fb81425.exe	106
PID 3620 wrote to memory of 2176	3620	0351de358f0827eb3a2a66bb5fb81425.exe	106
PID 3628 wrote to memory of 2088	3628	tqnlxixl.exe	110
PID 3628 wrote to memory of 2088	3628	tqnlxixl.exe	110
PID 3628 wrote to memory of 2088	3628	tqnlxixl.exe	110
PID 3628 wrote to memory of 2088	3628	tqnlxixl.exe	110
PID 3628 wrote to memory of 2088	3628	tqnlxixl.exe	110

C:\Users\Admin\AppData\Local\Temp\0351de358f0827eb3a2a66bb5fb81425.exe
"C:\Users\Admin\AppData\Local\Temp\0351de358f0827eb3a2a66bb5fb81425.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3620
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mwzzvgmf\
  2⤵
  PID:2288
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tqnlxixl.exe" C:\Windows\SysWOW64\mwzzvgmf\
  2⤵
  PID:372
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create mwzzvgmf binPath= "C:\Windows\SysWOW64\mwzzvgmf\tqnlxixl.exe /d\"C:\Users\Admin\AppData\Local\Temp\0351de358f0827eb3a2a66bb5fb81425.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4660
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description mwzzvgmf "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1132
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start mwzzvgmf
  2⤵
  - Launches sc.exe
  PID:2720
- 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:2176

C:\Windows\SysWOW64\mwzzvgmf\tqnlxixl.exe
C:\Windows\SysWOW64\mwzzvgmf\tqnlxixl.exe /d"C:\Users\Admin\AppData\Local\Temp\0351de358f0827eb3a2a66bb5fb81425.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3628
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2088

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

tqnlxixl.exe

Path C:\Users\Admin\AppData\Local\Temp\tqnlxixl.exe
Size 10.8MB
SHA256 c57cd781e105df0287da5f50cd495eb00269d0254794e704c31f861648410592
MD5 46585ae7dfd1d78881561812bd460d03
SHA1 613907bae5f212efe675836a4d98b6d42ffdc1cd
SHA512 07b7d11be7d51e6b0765556cc45fd0a21b83564a3455fd9f66d789e583fabe12b798b41cc3e9c68205afbf20f7ec58690fcbabf989ac8babe8d6d936ed52b37f
SSDEEP 24576:xT8rgnPp+RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRg:3p+o
MD5 SHA1 SHA512 SSDEEP

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tqnlxixl.exe

Path C:\Windows\SysWOW64\mwzzvgmf\tqnlxixl.exe
Size 10.8MB
SHA256 b335dcc548e0f8d6c4efe6ccb72e6a733c5d257c68cd1cc007d906410fe13e1c
MD5 543770fccc9d7b1b718277ae7471b346
SHA1 1fc20e77e37aa73c8aa9b516a9a6dbbc05a19ee3
SHA512 e261815c1baef80b2cff99e07ce4e4ae3102c961ec424c737eaf587114830b09d126d1360ff2cc8c5b045505cbf9ebe9c59cfefeff8f0f6d8970134e2248bdbc
SSDEEP 24576:xT8rgnPp+RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRP:3p+
MD5 SHA1 SHA512 SSDEEP

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memory/2088-25-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/2088-24-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/2088-23-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/2088-18-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/3620-7-0x0000000000B80000-0x0000000000C80000-memory.dmp

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memory/3620-12-0x0000000000400000-0x00000000008EE000-memory.dmp

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memory/3620-9-0x0000000002520000-0x0000000002533000-memory.dmp

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memory/3620-1-0x0000000000B80000-0x0000000000C80000-memory.dmp

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memory/3620-5-0x0000000000400000-0x00000000008EE000-memory.dmp

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memory/3620-4-0x0000000000400000-0x00000000008EE000-memory.dmp

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memory/3620-2-0x0000000002520000-0x0000000002533000-memory.dmp

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memory/3628-15-0x0000000000B20000-0x0000000000C20000-memory.dmp

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memory/3628-16-0x0000000000400000-0x00000000008EE000-memory.dmp

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memory/3628-19-0x0000000000400000-0x00000000008EE000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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