tofsee | 4c39affb8098b65b972a1c3fa7dc4bb8435f89866780d6e80d29b83a7db44694

Analysis

max time kernel
185s
max time network
212s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 03:33

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General

Target
0d182f5341367e6d26916b6e009496be.exe
Size 14.8MB
Sample231230-d4ptlsfdg8
SHA256 4c39affb8098b65b972a1c3fa7dc4bb8435f89866780d6e80d29b83a7db44694
MD5 0d182f5341367e6d26916b6e009496be
SHA1 f12ebcbc8fc57312edf88d261f493fcf2f1b7269
SHA512 563498012cd53421efce4ac1800c8a3496bccccca6962e5dc5c25ae2ca8dbd2f14ed96da4914c6426b323e37edf4a86394bf565a34c0af742a39022bb292aa5e
SSDEEP 49152:wRBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBp:
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
2728	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\zjcgrrku\ImagePath = "C:\\Windows\\SysWOW64\\zjcgrrku\\nwlgsryi.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	0d182f5341367e6d26916b6e009496be.exe

Deletes itself 1 IoCs

pid	Process
1984	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2608	nwlgsryi.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2608 set thread context of 1984	2608	nwlgsryi.exe	110

Launches sc.exe 3 IoCs

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

pid	Process
2852	sc.exe
4940	sc.exe
3728	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
4452	3456	WerFault.exe	92
1048	2608	WerFault.exe	104

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3456 wrote to memory of 1692	3456	0d182f5341367e6d26916b6e009496be.exe	94
PID 3456 wrote to memory of 1692	3456	0d182f5341367e6d26916b6e009496be.exe	94
PID 3456 wrote to memory of 1692	3456	0d182f5341367e6d26916b6e009496be.exe	94
PID 3456 wrote to memory of 2864	3456	0d182f5341367e6d26916b6e009496be.exe	96
PID 3456 wrote to memory of 2864	3456	0d182f5341367e6d26916b6e009496be.exe	96
PID 3456 wrote to memory of 2864	3456	0d182f5341367e6d26916b6e009496be.exe	96
PID 3456 wrote to memory of 2852	3456	0d182f5341367e6d26916b6e009496be.exe	98
PID 3456 wrote to memory of 2852	3456	0d182f5341367e6d26916b6e009496be.exe	98
PID 3456 wrote to memory of 2852	3456	0d182f5341367e6d26916b6e009496be.exe	98
PID 3456 wrote to memory of 4940	3456	0d182f5341367e6d26916b6e009496be.exe	100
PID 3456 wrote to memory of 4940	3456	0d182f5341367e6d26916b6e009496be.exe	100
PID 3456 wrote to memory of 4940	3456	0d182f5341367e6d26916b6e009496be.exe	100
PID 3456 wrote to memory of 3728	3456	0d182f5341367e6d26916b6e009496be.exe	102
PID 3456 wrote to memory of 3728	3456	0d182f5341367e6d26916b6e009496be.exe	102
PID 3456 wrote to memory of 3728	3456	0d182f5341367e6d26916b6e009496be.exe	102
PID 3456 wrote to memory of 2728	3456	0d182f5341367e6d26916b6e009496be.exe	105
PID 3456 wrote to memory of 2728	3456	0d182f5341367e6d26916b6e009496be.exe	105
PID 3456 wrote to memory of 2728	3456	0d182f5341367e6d26916b6e009496be.exe	105
PID 2608 wrote to memory of 1984	2608	nwlgsryi.exe	110
PID 2608 wrote to memory of 1984	2608	nwlgsryi.exe	110
PID 2608 wrote to memory of 1984	2608	nwlgsryi.exe	110
PID 2608 wrote to memory of 1984	2608	nwlgsryi.exe	110
PID 2608 wrote to memory of 1984	2608	nwlgsryi.exe	110

C:\Users\Admin\AppData\Local\Temp\0d182f5341367e6d26916b6e009496be.exe
"C:\Users\Admin\AppData\Local\Temp\0d182f5341367e6d26916b6e009496be.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zjcgrrku\
  2⤵
  PID:1692
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nwlgsryi.exe" C:\Windows\SysWOW64\zjcgrrku\
  2⤵
  PID:2864
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zjcgrrku binPath= "C:\Windows\SysWOW64\zjcgrrku\nwlgsryi.exe /d\"C:\Users\Admin\AppData\Local\Temp\0d182f5341367e6d26916b6e009496be.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2852
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zjcgrrku "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4940
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zjcgrrku
  2⤵
  - Launches sc.exe
  PID:3728
- 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:2728
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3456 -s 1268
  2⤵
  - Program crash
  PID:4452

C:\Windows\SysWOW64\zjcgrrku\nwlgsryi.exe
C:\Windows\SysWOW64\zjcgrrku\nwlgsryi.exe /d"C:\Users\Admin\AppData\Local\Temp\0d182f5341367e6d26916b6e009496be.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2608
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1984
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2608 -s 512
  2⤵
  - Program crash
  PID:1048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3456 -ip 3456
1⤵
PID:3812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 180 -p 2608 -ip 2608
1⤵
PID:4144

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

nwlgsryi.exe

Path C:\Users\Admin\AppData\Local\Temp\nwlgsryi.exe
Size 1.2MB
SHA256 2dd35fc0c8efde77ca983908fa673b88e876b457acc4b9bb82f1e535315a2535
MD5 90d38cf2a939dda4865fbdc3983a474b
SHA1 f3a52896d5921d6a6295832814c1ea9eaa5db35c
SHA512 68e070f38be026712f5ddc5fbb160bbd87e20604674300ee08f05508bc55334011c604fb88b683d1f1450e2057f3df98006a450ed24d6d63d6b24a5a15032829
SSDEEP 24576:fHJvRBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBi:JRBBBBBBBBBBBBBBBBBBBBBBBBBBBBBO
MD5 SHA1 SHA512 SSDEEP

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nwlgsryi.exe

Path C:\Windows\SysWOW64\zjcgrrku\nwlgsryi.exe
Size 2.0MB
SHA256 cc659cc20c337e5948d2408ed4a74e8ee7f64c9dfa8049e8aeb8d6d603c819e3
MD5 6be60d2cca3dffc8260daafc1bd44b75
SHA1 f18e726d40f501df4857d956ab2d886f30357f6e
SHA512 83888dde1b3469d0ce6582646ed90ec95b2181a8d9cb236da32175cccbc5ac6205ea8795829d0299f0d714c3f04784a03785cb98fb68bdccb68fd589eb3fe019
SSDEEP 49152:JRBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB:
MD5 SHA1 SHA512 SSDEEP

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memory/1984-15-0x0000000000A20000-0x0000000000A35000-memory.dmp

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memory/1984-33-0x0000000000A20000-0x0000000000A35000-memory.dmp

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memory/1984-26-0x0000000000A20000-0x0000000000A35000-memory.dmp

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memory/1984-22-0x0000000000A20000-0x0000000000A35000-memory.dmp

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memory/1984-21-0x0000000000A20000-0x0000000000A35000-memory.dmp

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memory/2608-12-0x0000000000E90000-0x0000000000F90000-memory.dmp

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memory/2608-13-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/2608-16-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/2608-18-0x0000000000E90000-0x0000000000F90000-memory.dmp

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memory/3456-1-0x0000000000D60000-0x0000000000E60000-memory.dmp

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memory/3456-10-0x0000000002810000-0x0000000002823000-memory.dmp

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memory/3456-9-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/3456-5-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/3456-4-0x0000000000400000-0x0000000000C0A000-memory.dmp

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memory/3456-2-0x0000000002810000-0x0000000002823000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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