tofsee | e9a144f45ff4fa0e1cb4e90bd65284c86dfcff9651ded99d62af4d045e1d700e

General

Target

900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe
Size

204KB
MD5

1f57a9bb99804b8193ef503404bb7387
SHA1

674710911110b4b45030b990dabb3c45fd095b3f
SHA256

900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7
SHA512

d93b6d24f3fdb267a0d43195bbba3494cb2734756e5e3090cea9e65c584d66ca5eb1842bda274f484a42dac89f2fb196a2ef83e9f8e70dad4ca4b1351c3acce7
SSDEEP

3072:qfrB/GLaZdXUNc8iirJiM21K7uu+5Oiq08tJz5zoy887jImQpeBNMRDx/+cmH:qfrwclVORxv5z8kI1x2co

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

776 netsh.exe

pid	process
776	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\khctgfsb\ImagePath = "C:\\Windows\\SysWOW64\\khctgfsb\\wiuzwcbp.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2904 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

wiuzwcbp.exe

pid process

2108 wiuzwcbp.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

wiuzwcbp.exe

description pid process target process

PID 2108 set thread context of 2904 2108 wiuzwcbp.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2024 sc.exe
928 sc.exe
1108 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2904	svchost.exe

pid	process
2108	wiuzwcbp.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

description	pid	process	target process
PID 2108 set thread context of 2904	2108	wiuzwcbp.exe	svchost.exe

pid	process
2024	sc.exe
928	sc.exe
1108	sc.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exewiuzwcbp.exe

description	pid	process	target process
PID 2360 wrote to memory of 2620	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	cmd.exe
PID 2360 wrote to memory of 2620	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	cmd.exe
PID 2360 wrote to memory of 2620	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	cmd.exe
PID 2360 wrote to memory of 2620	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	cmd.exe
PID 2360 wrote to memory of 2628	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	cmd.exe
PID 2360 wrote to memory of 2628	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	cmd.exe
PID 2360 wrote to memory of 2628	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	cmd.exe
PID 2360 wrote to memory of 2628	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	cmd.exe
PID 2360 wrote to memory of 2024	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 2024	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 2024	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 2024	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 928	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 928	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 928	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 928	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 1108	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 1108	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 1108	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 1108	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	sc.exe
PID 2360 wrote to memory of 776	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	netsh.exe
PID 2360 wrote to memory of 776	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	netsh.exe
PID 2360 wrote to memory of 776	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	netsh.exe
PID 2360 wrote to memory of 776	2360	900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe	netsh.exe
PID 2108 wrote to memory of 2904	2108	wiuzwcbp.exe	svchost.exe
PID 2108 wrote to memory of 2904	2108	wiuzwcbp.exe	svchost.exe
PID 2108 wrote to memory of 2904	2108	wiuzwcbp.exe	svchost.exe
PID 2108 wrote to memory of 2904	2108	wiuzwcbp.exe	svchost.exe
PID 2108 wrote to memory of 2904	2108	wiuzwcbp.exe	svchost.exe
PID 2108 wrote to memory of 2904	2108	wiuzwcbp.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe
"C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\khctgfsb\
  2⤵
  PID:2620
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wiuzwcbp.exe" C:\Windows\SysWOW64\khctgfsb\
  2⤵
  PID:2628
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create khctgfsb binPath= "C:\Windows\SysWOW64\khctgfsb\wiuzwcbp.exe /d\"C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2024
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description khctgfsb "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:928
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start khctgfsb
  2⤵
  - Launches sc.exe
  PID:1108
- 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:776

C:\Windows\SysWOW64\khctgfsb\wiuzwcbp.exe
C:\Windows\SysWOW64\khctgfsb\wiuzwcbp.exe /d"C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2108
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  PID:2904

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

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
11.3MB

MD5
2ba929051973e1ae02805299be42264e

SHA1
0fddd687892960c9ad6368a34f1b7f8cadc38218

SHA256
3f86ed3399a424f86cbd05664cc1ad218d7bd0bacf8de6afc2141f732b6f89fe

SHA512
a6ff76465dfd7aae6406b0c2a7f2b17c159022ae5d45c224a19b588bb7d1890274c471e3ea897f86827d1c6fe40bd34aa11e2e3bb274ccdc437bfe62edf8e533

Download Submit
memory/2108-22-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2108-16-0x00000000004F0000-0x00000000005F0000-memory.dmp

Filesize
1024KB

Download
memory/2108-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2360-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2360-3-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2360-5-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2360-7-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/2360-9-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2360-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2360-1-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/2904-19-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2904-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2904-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2904-24-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2904-25-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2904-26-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2904-27-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2904-29-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2904-30-0x0000000001A10000-0x0000000001C1F000-memory.dmp

Filesize
2.1MB

Download
memory/2904-33-0x0000000001A10000-0x0000000001C1F000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads