tofsee | 74bd2e5d66d6ccb15a6ff3ece5ec2f56dafe6fffb201d73c0a9f1d06818542f1

General

Target

65c0ab98adcba2c36a8da6d36a1b12d8.exe
Size

11.7MB
MD5

65c0ab98adcba2c36a8da6d36a1b12d8
SHA1

b68e7f29929883834dc771c5b61732f10503ab7e
SHA256

74bd2e5d66d6ccb15a6ff3ece5ec2f56dafe6fffb201d73c0a9f1d06818542f1
SHA512

6931e99653ce5ebe1375aa050dceaa04c0bde1bb69929a8f8998ec8268c093d7362a76c5ad7557a1ed8cd089a89a44fc0498c8ee7fa5c4da18842cf26772136c
SSDEEP

6144:bnqXDHjKw5RZmN+RrjeO6wWSLL78/nk5agPEWHtIhiiiiiiiiiiiiiiiiiiiiiiz:+XbjKw5bmN+RPWcLI/niag8E

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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
4616	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\nqtwzyye\ImagePath = "C:\\Windows\\SysWOW64\\nqtwzyye\\ntephwqc.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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	65c0ab98adcba2c36a8da6d36a1b12d8.exe

Deletes itself 1 IoCs

pid	Process
4552	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2504	ntephwqc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2504 set thread context of 4552	2504	ntephwqc.exe	114

Launches sc.exe 3 IoCs

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

pid	Process
636	sc.exe
1972	sc.exe
3312	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
3516	3076	WerFault.exe	88
4432	2504	WerFault.exe	105

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3076 wrote to memory of 5052	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	93
PID 3076 wrote to memory of 5052	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	93
PID 3076 wrote to memory of 5052	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	93
PID 3076 wrote to memory of 3872	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	96
PID 3076 wrote to memory of 3872	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	96
PID 3076 wrote to memory of 3872	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	96
PID 3076 wrote to memory of 636	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	99
PID 3076 wrote to memory of 636	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	99
PID 3076 wrote to memory of 636	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	99
PID 3076 wrote to memory of 1972	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	102
PID 3076 wrote to memory of 1972	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	102
PID 3076 wrote to memory of 1972	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	102
PID 3076 wrote to memory of 3312	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	103
PID 3076 wrote to memory of 3312	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	103
PID 3076 wrote to memory of 3312	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	103
PID 3076 wrote to memory of 4616	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	108
PID 3076 wrote to memory of 4616	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	108
PID 3076 wrote to memory of 4616	3076	65c0ab98adcba2c36a8da6d36a1b12d8.exe	108
PID 2504 wrote to memory of 4552	2504	ntephwqc.exe	114
PID 2504 wrote to memory of 4552	2504	ntephwqc.exe	114
PID 2504 wrote to memory of 4552	2504	ntephwqc.exe	114
PID 2504 wrote to memory of 4552	2504	ntephwqc.exe	114
PID 2504 wrote to memory of 4552	2504	ntephwqc.exe	114

C:\Users\Admin\AppData\Local\Temp\65c0ab98adcba2c36a8da6d36a1b12d8.exe
"C:\Users\Admin\AppData\Local\Temp\65c0ab98adcba2c36a8da6d36a1b12d8.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3076
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nqtwzyye\
  2⤵
  PID:5052
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ntephwqc.exe" C:\Windows\SysWOW64\nqtwzyye\
  2⤵
  PID:3872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create nqtwzyye binPath= "C:\Windows\SysWOW64\nqtwzyye\ntephwqc.exe /d\"C:\Users\Admin\AppData\Local\Temp\65c0ab98adcba2c36a8da6d36a1b12d8.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:636
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description nqtwzyye "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1972
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start nqtwzyye
  2⤵
  - Launches sc.exe
  PID:3312
- 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:4616
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3076 -s 1224
  2⤵
  - Program crash
  PID:3516

C:\Windows\SysWOW64\nqtwzyye\ntephwqc.exe
C:\Windows\SysWOW64\nqtwzyye\ntephwqc.exe /d"C:\Users\Admin\AppData\Local\Temp\65c0ab98adcba2c36a8da6d36a1b12d8.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2504 -s 516
  2⤵
  - Program crash
  PID:4432
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3076 -ip 3076
1⤵
PID:3048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2504 -ip 2504
1⤵
PID:4548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ntephwqc.exe

Filesize
7.0MB

MD5
d453126a88ed9bde5041e5514e093b96

SHA1
e6ff7250e841e6daa5f1b59184378e9482585d25

SHA256
7275a94c0519a1425134c22d5ba389920b0faf1b80ced9981a9d3d9aac4411a1

SHA512
22615c6641956cf363869b9c504789ad168c434eb8705ce67a2180b276921595dad8c6dd52cb36a98dd4a5b4c80492e5fad362506ec383b2fa4cb15f0e5de820

Download Submit
C:\Windows\SysWOW64\nqtwzyye\ntephwqc.exe

Filesize
1.5MB

MD5
668f264d5222368eb1a7ece718bc282e

SHA1
1e97960fee0497e2cee07252b763fb627add4460

SHA256
1a197bf9cfc58be3b3ec2b8e6468b6b56f172ae249dc5fe796e1becb386d7638

SHA512
73b1d0623cff435244820f9d870ff0fcc376c2fbb8895b0fa5a076ad4fdb413dec99f80a0a863b8e8ad52380b22813a1f7ad67f1d566a1762eb05425250b1641

Download Submit
memory/2504-14-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/2504-12-0x0000000000960000-0x0000000000A60000-memory.dmp

Filesize
1024KB

Download
memory/3076-8-0x0000000000A50000-0x0000000000A63000-memory.dmp

Filesize
76KB

Download
memory/3076-7-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/3076-1-0x0000000000A70000-0x0000000000B70000-memory.dmp

Filesize
1024KB

Download
memory/3076-4-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/3076-2-0x0000000000A50000-0x0000000000A63000-memory.dmp

Filesize
76KB

Download
memory/4552-10-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/4552-16-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/4552-18-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/4552-15-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download
memory/4552-19-0x00000000010C0000-0x00000000010D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads