tofsee | 97226e55b0b223c1f897564afdb575582da1f493a7e2a44765fd2883c887b25a

Analysis

max time kernel
129s
max time network
141s
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, 19:15

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General

Target
5140d127b1646f1e0c743bc089dcdd11.exe
Size 14.7MB
Sample240110-xyg2csecgl
SHA256 97226e55b0b223c1f897564afdb575582da1f493a7e2a44765fd2883c887b25a
MD5 5140d127b1646f1e0c743bc089dcdd11
SHA1 617215fc6f317f28f720ae32890e5655e72c0246
SHA512 027646ca100d40773f29a48a39ba54521d22f850064e66608faabcca1ccfbc894df70cd1bd5cca777229a2628e2f6d5de1e83ec7691b604f2738d53d1a07e3dd
SSDEEP 49152:eBpQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQH:
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
3368	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\rrxgndfm\ImagePath = "C:\\Windows\\SysWOW64\\rrxgndfm\\lhzxforj.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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	5140d127b1646f1e0c743bc089dcdd11.exe

Deletes itself 1 IoCs

pid	Process
2872	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2848	lhzxforj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2848 set thread context of 2872	2848	lhzxforj.exe	110

Launches sc.exe 3 IoCs

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

pid	Process
380	sc.exe
3536	sc.exe
3616	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
1000	4560	WerFault.exe	87
388	2848	WerFault.exe	103

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4560 wrote to memory of 2944	4560	5140d127b1646f1e0c743bc089dcdd11.exe	91
PID 4560 wrote to memory of 2944	4560	5140d127b1646f1e0c743bc089dcdd11.exe	91
PID 4560 wrote to memory of 2944	4560	5140d127b1646f1e0c743bc089dcdd11.exe	91
PID 4560 wrote to memory of 4376	4560	5140d127b1646f1e0c743bc089dcdd11.exe	93
PID 4560 wrote to memory of 4376	4560	5140d127b1646f1e0c743bc089dcdd11.exe	93
PID 4560 wrote to memory of 4376	4560	5140d127b1646f1e0c743bc089dcdd11.exe	93
PID 4560 wrote to memory of 380	4560	5140d127b1646f1e0c743bc089dcdd11.exe	94
PID 4560 wrote to memory of 380	4560	5140d127b1646f1e0c743bc089dcdd11.exe	94
PID 4560 wrote to memory of 380	4560	5140d127b1646f1e0c743bc089dcdd11.exe	94
PID 4560 wrote to memory of 3536	4560	5140d127b1646f1e0c743bc089dcdd11.exe	97
PID 4560 wrote to memory of 3536	4560	5140d127b1646f1e0c743bc089dcdd11.exe	97
PID 4560 wrote to memory of 3536	4560	5140d127b1646f1e0c743bc089dcdd11.exe	97
PID 4560 wrote to memory of 3616	4560	5140d127b1646f1e0c743bc089dcdd11.exe	101
PID 4560 wrote to memory of 3616	4560	5140d127b1646f1e0c743bc089dcdd11.exe	101
PID 4560 wrote to memory of 3616	4560	5140d127b1646f1e0c743bc089dcdd11.exe	101
PID 4560 wrote to memory of 3368	4560	5140d127b1646f1e0c743bc089dcdd11.exe	105
PID 4560 wrote to memory of 3368	4560	5140d127b1646f1e0c743bc089dcdd11.exe	105
PID 4560 wrote to memory of 3368	4560	5140d127b1646f1e0c743bc089dcdd11.exe	105
PID 2848 wrote to memory of 2872	2848	lhzxforj.exe	110
PID 2848 wrote to memory of 2872	2848	lhzxforj.exe	110
PID 2848 wrote to memory of 2872	2848	lhzxforj.exe	110
PID 2848 wrote to memory of 2872	2848	lhzxforj.exe	110
PID 2848 wrote to memory of 2872	2848	lhzxforj.exe	110

C:\Users\Admin\AppData\Local\Temp\5140d127b1646f1e0c743bc089dcdd11.exe
"C:\Users\Admin\AppData\Local\Temp\5140d127b1646f1e0c743bc089dcdd11.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4560
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rrxgndfm\
  2⤵
  PID:2944
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lhzxforj.exe" C:\Windows\SysWOW64\rrxgndfm\
  2⤵
  PID:4376
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rrxgndfm binPath= "C:\Windows\SysWOW64\rrxgndfm\lhzxforj.exe /d\"C:\Users\Admin\AppData\Local\Temp\5140d127b1646f1e0c743bc089dcdd11.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:380
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rrxgndfm "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rrxgndfm
  2⤵
  - Launches sc.exe
  PID:3616
- 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:3368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4560 -s 676
  2⤵
  - Program crash
  PID:1000

C:\Windows\SysWOW64\rrxgndfm\lhzxforj.exe
C:\Windows\SysWOW64\rrxgndfm\lhzxforj.exe /d"C:\Users\Admin\AppData\Local\Temp\5140d127b1646f1e0c743bc089dcdd11.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2848 -s 220
  2⤵
  - Program crash
  PID:388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4560 -ip 4560
1⤵
PID:2304

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 2848 -ip 2848
1⤵
PID:4768

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

lhzxforj.exe

Path C:\Users\Admin\AppData\Local\Temp\lhzxforj.exe
Size 2.3MB
SHA256 af5d5255c6fc3f1148e51bab7b923c1f79b5a25721ea73ad7e27c41d8edcd0c0
MD5 678d0683c6f73d49ec3421de89fa275c
SHA1 319911ecd6d081b1026fbb7adee31dc358e43b94
SHA512 1bb6847be186bf8b3c819c22bf58f9e531c01313a009a5c5991b502da2d7d37a6bd9221336ba0b19e360c7148db73ff46d61389ed49e0ee17300ed8dc8d63791
SSDEEP 24576:+p6MeFpQQQQQQQQQQQQQQQQQQQQQQQQQQQQ:BBpQQQQQQQQQQQQQQQQQQQQQQQQQQQQ
MD5 SHA1 SHA512 SSDEEP

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lhzxforj.exe

Path C:\Windows\SysWOW64\rrxgndfm\lhzxforj.exe
Size 5.6MB
SHA256 dab6b5d46b29b20d9045a57c0f3b21c0b03c9a03c730ac26897afffb4db7da43
MD5 617cfeaea7dded67dc20b78bfd62c9e1
SHA1 6d35ac0e2cb40a7ccd7902f1c8b762ee99d3ca46
SHA512 9ae6c7bb5e1aa39589705a401ece8e12ecf3d6e840b509b0d956a6c1997ace5f2baa1f07e4244af2d4117f365a77f4295dce75a46f48384ffa67e5f09d4dab4c
SSDEEP 49152:BBpQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ8:
MD5 SHA1 SHA512 SSDEEP

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memory/2848-11-0x0000000003530000-0x0000000003630000-memory.dmp

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memory/2848-18-0x0000000000400000-0x000000000323B000-memory.dmp

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memory/2848-12-0x0000000000400000-0x000000000323B000-memory.dmp

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memory/2872-13-0x0000000000DB0000-0x0000000000DC5000-memory.dmp

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memory/2872-17-0x0000000000DB0000-0x0000000000DC5000-memory.dmp

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memory/2872-19-0x0000000000DB0000-0x0000000000DC5000-memory.dmp

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memory/2872-20-0x0000000000DB0000-0x0000000000DC5000-memory.dmp

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memory/4560-10-0x0000000004F90000-0x0000000004FA3000-memory.dmp

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memory/4560-7-0x0000000000400000-0x000000000323B000-memory.dmp

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memory/4560-4-0x0000000000400000-0x000000000323B000-memory.dmp

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memory/4560-1-0x0000000003260000-0x0000000003360000-memory.dmp

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memory/4560-2-0x0000000004F90000-0x0000000004FA3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads