tofsee | 949e796eb71a8f934d95a05617c1a032fcbb8b46c59d61315773467b7c71d8b6

Analysis

max time kernel
168s
max time network
175s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
10/01/2024, 22:49

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General

Target
51d535916ba8199ad544480b70b5a77e.exe
Size 13.1MB
Sample240110-2rth2ahfhp
SHA256 949e796eb71a8f934d95a05617c1a032fcbb8b46c59d61315773467b7c71d8b6
MD5 51d535916ba8199ad544480b70b5a77e
SHA1 37d432ab4eb74352093c01885bf2ef69f71d930a
SHA512 12167c124ff2439c95fac0ca7952d825d164b33b2f39318f2cedc50f86ee98b85f65e27d7037edfd180564a56a203f4b326e13535e47884a40f1b9b32461fb55
SSDEEP 393216:NmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmK:NmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmK
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
1536	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\nlcgrxpb\ImagePath = "C:\\Windows\\SysWOW64\\nlcgrxpb\\lziqsucf.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	51d535916ba8199ad544480b70b5a77e.exe

Deletes itself 1 IoCs

pid	Process
1248	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4112	lziqsucf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4112 set thread context of 1248	4112	lziqsucf.exe	112

Launches sc.exe 3 IoCs

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

pid	Process
3656	sc.exe
216	sc.exe
1008	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
1372	3440	WerFault.exe	90
3460	4112	WerFault.exe	110

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3440 wrote to memory of 1124	3440	51d535916ba8199ad544480b70b5a77e.exe	97
PID 3440 wrote to memory of 1124	3440	51d535916ba8199ad544480b70b5a77e.exe	97
PID 3440 wrote to memory of 1124	3440	51d535916ba8199ad544480b70b5a77e.exe	97
PID 3440 wrote to memory of 3116	3440	51d535916ba8199ad544480b70b5a77e.exe	99
PID 3440 wrote to memory of 3116	3440	51d535916ba8199ad544480b70b5a77e.exe	99
PID 3440 wrote to memory of 3116	3440	51d535916ba8199ad544480b70b5a77e.exe	99
PID 3440 wrote to memory of 3656	3440	51d535916ba8199ad544480b70b5a77e.exe	101
PID 3440 wrote to memory of 3656	3440	51d535916ba8199ad544480b70b5a77e.exe	101
PID 3440 wrote to memory of 3656	3440	51d535916ba8199ad544480b70b5a77e.exe	101
PID 3440 wrote to memory of 216	3440	51d535916ba8199ad544480b70b5a77e.exe	103
PID 3440 wrote to memory of 216	3440	51d535916ba8199ad544480b70b5a77e.exe	103
PID 3440 wrote to memory of 216	3440	51d535916ba8199ad544480b70b5a77e.exe	103
PID 3440 wrote to memory of 1008	3440	51d535916ba8199ad544480b70b5a77e.exe	105
PID 3440 wrote to memory of 1008	3440	51d535916ba8199ad544480b70b5a77e.exe	105
PID 3440 wrote to memory of 1008	3440	51d535916ba8199ad544480b70b5a77e.exe	105
PID 3440 wrote to memory of 1536	3440	51d535916ba8199ad544480b70b5a77e.exe	107
PID 3440 wrote to memory of 1536	3440	51d535916ba8199ad544480b70b5a77e.exe	107
PID 3440 wrote to memory of 1536	3440	51d535916ba8199ad544480b70b5a77e.exe	107
PID 4112 wrote to memory of 1248	4112	lziqsucf.exe	112
PID 4112 wrote to memory of 1248	4112	lziqsucf.exe	112
PID 4112 wrote to memory of 1248	4112	lziqsucf.exe	112
PID 4112 wrote to memory of 1248	4112	lziqsucf.exe	112
PID 4112 wrote to memory of 1248	4112	lziqsucf.exe	112

C:\Users\Admin\AppData\Local\Temp\51d535916ba8199ad544480b70b5a77e.exe
"C:\Users\Admin\AppData\Local\Temp\51d535916ba8199ad544480b70b5a77e.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3440
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nlcgrxpb\
  2⤵
  PID:1124
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lziqsucf.exe" C:\Windows\SysWOW64\nlcgrxpb\
  2⤵
  PID:3116
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nlcgrxpb binPath= "C:\Windows\SysWOW64\nlcgrxpb\lziqsucf.exe /d\"C:\Users\Admin\AppData\Local\Temp\51d535916ba8199ad544480b70b5a77e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3656
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nlcgrxpb "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:216
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nlcgrxpb
  2⤵
  - Launches sc.exe
  PID:1008
- 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:1536
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3440 -s 668
  2⤵
  - Program crash
  PID:1372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3440 -ip 3440
1⤵
PID:4552

C:\Windows\SysWOW64\nlcgrxpb\lziqsucf.exe
C:\Windows\SysWOW64\nlcgrxpb\lziqsucf.exe /d"C:\Users\Admin\AppData\Local\Temp\51d535916ba8199ad544480b70b5a77e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4112
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4112 -s 260
  2⤵
  - Program crash
  PID:3460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 4112 -ip 4112
1⤵
PID:4332

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

lziqsucf.exe

Path C:\Users\Admin\AppData\Local\Temp\lziqsucf.exe
Size 11.5MB
SHA256 7400d5237a3003fdbcd071dfd72689a34a7b30c1118fc25c67a57fbd36b70e0e
MD5 b15dc29024516aedd7785271f2e43ced
SHA1 d183738b0611e4936e1c9f7f3b66aeee66e9b7c9
SHA512 bf163c584f6604b071dbbf116d26be64e7882ef7aea1ade24317b6ff40ada0cf683403d5211ed7f770ea28893b6b2eb2c1c057a1e15af7df6a689c922a752211
SSDEEP 196608:Ymmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmme:Ymmmmmmmmmmmmmmmmmmmmmmmmmmmmmme
MD5 SHA1 SHA512 SSDEEP

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memory/1248-25-0x0000000000430000-0x0000000000445000-memory.dmp

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memory/1248-24-0x0000000000430000-0x0000000000445000-memory.dmp

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memory/1248-23-0x0000000000430000-0x0000000000445000-memory.dmp

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memory/1248-20-0x0000000000430000-0x0000000000445000-memory.dmp

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memory/1248-17-0x0000000000430000-0x0000000000445000-memory.dmp

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memory/3440-6-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/3440-8-0x00000000008B0000-0x00000000008C3000-memory.dmp

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memory/3440-14-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/3440-7-0x00000000008D0000-0x00000000009D0000-memory.dmp

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memory/3440-1-0x00000000008D0000-0x00000000009D0000-memory.dmp

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memory/3440-4-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/3440-3-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/3440-2-0x00000000008B0000-0x00000000008C3000-memory.dmp

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memory/4112-15-0x00000000009E0000-0x0000000000AE0000-memory.dmp

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memory/4112-16-0x0000000000400000-0x000000000089C000-memory.dmp

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memory/4112-22-0x0000000000400000-0x000000000089C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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