tofsee | fd6951fac18ed6a157eee8cf58889ade60eb3e727fcb0b5b7d2f945c8016f7ff

Analysis

max time kernel
225s
max time network
260s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
11/01/2024, 00:53

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General

Target
5219ae8b49d9430de458aca19cd0d490.exe
Size 13.3MB
Sample240111-a86fdabdfj
SHA256 fd6951fac18ed6a157eee8cf58889ade60eb3e727fcb0b5b7d2f945c8016f7ff
MD5 5219ae8b49d9430de458aca19cd0d490
SHA1 8bbf329910c28982d1ef33fc8e7cfc79689a19cb
SHA512 5d159d91133aa1a17a79a8440d53a501557544a135c3ecf0724eddb7725268656c5c19b1fafaafa2cea957821bdae28aeb9b1c29150f8e88bd5d030ae8ba2a02
SSDEEP 393216:MooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooX:MooooooooooooooooooooooooooooooX
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

194.61.3.129
defeatwax.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
3672	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\guwwzycx\ImagePath = "C:\\Windows\\SysWOW64\\guwwzycx\\mqyrkqfe.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	5219ae8b49d9430de458aca19cd0d490.exe

Deletes itself 1 IoCs

pid	Process
2268	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
368	mqyrkqfe.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 368 set thread context of 2268	368	mqyrkqfe.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
1852	sc.exe
2268	sc.exe
1504	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
1740	3324	WerFault.exe	88
1704	368	WerFault.exe	101

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3324 wrote to memory of 3616	3324	5219ae8b49d9430de458aca19cd0d490.exe	90
PID 3324 wrote to memory of 3616	3324	5219ae8b49d9430de458aca19cd0d490.exe	90
PID 3324 wrote to memory of 3616	3324	5219ae8b49d9430de458aca19cd0d490.exe	90
PID 3324 wrote to memory of 3216	3324	5219ae8b49d9430de458aca19cd0d490.exe	93
PID 3324 wrote to memory of 3216	3324	5219ae8b49d9430de458aca19cd0d490.exe	93
PID 3324 wrote to memory of 3216	3324	5219ae8b49d9430de458aca19cd0d490.exe	93
PID 3324 wrote to memory of 1852	3324	5219ae8b49d9430de458aca19cd0d490.exe	95
PID 3324 wrote to memory of 1852	3324	5219ae8b49d9430de458aca19cd0d490.exe	95
PID 3324 wrote to memory of 1852	3324	5219ae8b49d9430de458aca19cd0d490.exe	95
PID 3324 wrote to memory of 2268	3324	5219ae8b49d9430de458aca19cd0d490.exe	97
PID 3324 wrote to memory of 2268	3324	5219ae8b49d9430de458aca19cd0d490.exe	97
PID 3324 wrote to memory of 2268	3324	5219ae8b49d9430de458aca19cd0d490.exe	97
PID 3324 wrote to memory of 1504	3324	5219ae8b49d9430de458aca19cd0d490.exe	99
PID 3324 wrote to memory of 1504	3324	5219ae8b49d9430de458aca19cd0d490.exe	99
PID 3324 wrote to memory of 1504	3324	5219ae8b49d9430de458aca19cd0d490.exe	99
PID 3324 wrote to memory of 3672	3324	5219ae8b49d9430de458aca19cd0d490.exe	102
PID 3324 wrote to memory of 3672	3324	5219ae8b49d9430de458aca19cd0d490.exe	102
PID 3324 wrote to memory of 3672	3324	5219ae8b49d9430de458aca19cd0d490.exe	102
PID 368 wrote to memory of 2268	368	mqyrkqfe.exe	108
PID 368 wrote to memory of 2268	368	mqyrkqfe.exe	108
PID 368 wrote to memory of 2268	368	mqyrkqfe.exe	108
PID 368 wrote to memory of 2268	368	mqyrkqfe.exe	108
PID 368 wrote to memory of 2268	368	mqyrkqfe.exe	108

C:\Users\Admin\AppData\Local\Temp\5219ae8b49d9430de458aca19cd0d490.exe
"C:\Users\Admin\AppData\Local\Temp\5219ae8b49d9430de458aca19cd0d490.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3324
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\guwwzycx\
  2⤵
  PID:3616
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mqyrkqfe.exe" C:\Windows\SysWOW64\guwwzycx\
  2⤵
  PID:3216
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create guwwzycx binPath= "C:\Windows\SysWOW64\guwwzycx\mqyrkqfe.exe /d\"C:\Users\Admin\AppData\Local\Temp\5219ae8b49d9430de458aca19cd0d490.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description guwwzycx "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2268
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start guwwzycx
  2⤵
  - Launches sc.exe
  PID:1504
- 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:3672
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3324 -s 1236
  2⤵
  - Program crash
  PID:1740

C:\Windows\SysWOW64\guwwzycx\mqyrkqfe.exe
C:\Windows\SysWOW64\guwwzycx\mqyrkqfe.exe /d"C:\Users\Admin\AppData\Local\Temp\5219ae8b49d9430de458aca19cd0d490.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:368
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2268
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 368 -s 520
  2⤵
  - Program crash
  PID:1704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3324 -ip 3324
1⤵
PID:3372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 368 -ip 368
1⤵
PID:396

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

mqyrkqfe.exe

Path C:\Users\Admin\AppData\Local\Temp\mqyrkqfe.exe
Size 10.9MB
SHA256 479a9b77331bead0e9960edb94f57a5951d5d3c5d042f17c9ba9e831c74fef72
MD5 ecfe2ad511257bab02e3e4f1b87f0240
SHA1 3f43493dd73b52641672af9fcaf55043d3068e0a
SHA512 d6535a34c1dd75ea2a689245de321288b93dd2a65a27cb72dadf7d5ba9e7aa51e6a0181d2d88b8f9b2ebd14956f6a226d04ba1d71895b9d9d9a181e99205a6e2
SSDEEP 196608:LooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooV:LooooooooooooooooooooooooooooooV
MD5 SHA1 SHA512 SSDEEP

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mqyrkqfe.exe

Path C:\Windows\SysWOW64\guwwzycx\mqyrkqfe.exe
Size 2.6MB
SHA256 ebff3eab37861c8ca9a0526cfb922ccb722cbd7d15c832f19a79be251d50b1f5
MD5 765c7467b4400fcb222aa4a50fc47f5c
SHA1 a6a870d370c11261a78fe2cebef308ccdefe4399
SHA512 a95ca810557707eda862de9fffdc1aa667204aeae3c5f836d4dfa91eeb18bc7f5af08c063e07376bc7d8d5993d8c74fc6aa5f34285e0c550c408b5a4f41629f3
SSDEEP 49152:buuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxuxus:b3oooooooooooooooooooooooooooos
MD5 SHA1 SHA512 SSDEEP

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memory/368-87-0x0000000000400000-0x000000000089B000-memory.dmp

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memory/368-93-0x0000000000400000-0x000000000089B000-memory.dmp

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memory/368-90-0x00000000009B0000-0x0000000000AB0000-memory.dmp

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memory/368-86-0x00000000009B0000-0x0000000000AB0000-memory.dmp

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memory/2268-100-0x00000000008B0000-0x00000000008C5000-memory.dmp

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memory/2268-99-0x00000000008B0000-0x00000000008C5000-memory.dmp

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memory/2268-98-0x00000000008B0000-0x00000000008C5000-memory.dmp

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memory/2268-97-0x00000000008B0000-0x00000000008C5000-memory.dmp

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memory/2268-92-0x00000000008B0000-0x00000000008C5000-memory.dmp

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memory/3324-6-0x0000000000400000-0x000000000089B000-memory.dmp

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memory/3324-12-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/3324-11-0x0000000000400000-0x000000000089B000-memory.dmp

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memory/3324-7-0x0000000000900000-0x0000000000A00000-memory.dmp

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memory/3324-1-0x0000000000900000-0x0000000000A00000-memory.dmp

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memory/3324-5-0x0000000000400000-0x000000000089B000-memory.dmp

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memory/3324-3-0x0000000000400000-0x000000000089B000-memory.dmp

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memory/3324-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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