tofsee | 819e8ea3bf2c3bd94269febabb6aa64c54cf542306ae38c35ad79862a3b25fcd

General

Target

74b207c88cf49d87489234697e01459a.exe
Size

14.8MB
MD5

74b207c88cf49d87489234697e01459a
SHA1

4b6aee7a8491f8af19baedab30e80198b4f4c395
SHA256

819e8ea3bf2c3bd94269febabb6aa64c54cf542306ae38c35ad79862a3b25fcd
SHA512

8b552b8e5724ebba31168c16759aea7035efc60b13eb203030aae6fc0adad1520ccf0da6371eabc2b61d96f646117c6699add6f6b1ea3247bf8e577443fbf554
SSDEEP

24576:ngdy5yNM4444444444444444444444444444444444444444444444444444444H:

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
5044	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\yjvduzf\ImagePath = "C:\\Windows\\SysWOW64\\yjvduzf\\pkzjotlj.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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	74b207c88cf49d87489234697e01459a.exe

Deletes itself 1 IoCs

pid	Process
4200	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2556	pkzjotlj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2556 set thread context of 4200	2556	pkzjotlj.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
3660	sc.exe
3736	sc.exe
4048	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
2996	1712	WerFault.exe	84
224	2556	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 948	1712	74b207c88cf49d87489234697e01459a.exe	88
PID 1712 wrote to memory of 948	1712	74b207c88cf49d87489234697e01459a.exe	88
PID 1712 wrote to memory of 948	1712	74b207c88cf49d87489234697e01459a.exe	88
PID 1712 wrote to memory of 2004	1712	74b207c88cf49d87489234697e01459a.exe	90
PID 1712 wrote to memory of 2004	1712	74b207c88cf49d87489234697e01459a.exe	90
PID 1712 wrote to memory of 2004	1712	74b207c88cf49d87489234697e01459a.exe	90
PID 1712 wrote to memory of 3660	1712	74b207c88cf49d87489234697e01459a.exe	92
PID 1712 wrote to memory of 3660	1712	74b207c88cf49d87489234697e01459a.exe	92
PID 1712 wrote to memory of 3660	1712	74b207c88cf49d87489234697e01459a.exe	92
PID 1712 wrote to memory of 3736	1712	74b207c88cf49d87489234697e01459a.exe	96
PID 1712 wrote to memory of 3736	1712	74b207c88cf49d87489234697e01459a.exe	96
PID 1712 wrote to memory of 3736	1712	74b207c88cf49d87489234697e01459a.exe	96
PID 1712 wrote to memory of 4048	1712	74b207c88cf49d87489234697e01459a.exe	99
PID 1712 wrote to memory of 4048	1712	74b207c88cf49d87489234697e01459a.exe	99
PID 1712 wrote to memory of 4048	1712	74b207c88cf49d87489234697e01459a.exe	99
PID 1712 wrote to memory of 5044	1712	74b207c88cf49d87489234697e01459a.exe	103
PID 1712 wrote to memory of 5044	1712	74b207c88cf49d87489234697e01459a.exe	103
PID 1712 wrote to memory of 5044	1712	74b207c88cf49d87489234697e01459a.exe	103
PID 2556 wrote to memory of 4200	2556	pkzjotlj.exe	108
PID 2556 wrote to memory of 4200	2556	pkzjotlj.exe	108
PID 2556 wrote to memory of 4200	2556	pkzjotlj.exe	108
PID 2556 wrote to memory of 4200	2556	pkzjotlj.exe	108
PID 2556 wrote to memory of 4200	2556	pkzjotlj.exe	108

C:\Users\Admin\AppData\Local\Temp\74b207c88cf49d87489234697e01459a.exe
"C:\Users\Admin\AppData\Local\Temp\74b207c88cf49d87489234697e01459a.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yjvduzf\
  2⤵
  PID:948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pkzjotlj.exe" C:\Windows\SysWOW64\yjvduzf\
  2⤵
  PID:2004
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create yjvduzf binPath= "C:\Windows\SysWOW64\yjvduzf\pkzjotlj.exe /d\"C:\Users\Admin\AppData\Local\Temp\74b207c88cf49d87489234697e01459a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3660
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description yjvduzf "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start yjvduzf
  2⤵
  - Launches sc.exe
  PID:4048
- 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:5044
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1712 -s 1220
  2⤵
  - Program crash
  PID:2996

C:\Windows\SysWOW64\yjvduzf\pkzjotlj.exe
C:\Windows\SysWOW64\yjvduzf\pkzjotlj.exe /d"C:\Users\Admin\AppData\Local\Temp\74b207c88cf49d87489234697e01459a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2556
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4200
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2556 -s 532
  2⤵
  - Program crash
  PID:224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1712 -ip 1712
1⤵
PID:3892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2556 -ip 2556
1⤵
PID:3844

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\pkzjotlj.exe

Filesize
13.1MB

MD5
fe593716212ef1f811ff4a1c2298989f

SHA1
24484bd48e2e4789307c91eb609e21c657f6cc4b

SHA256
5420b7eb72c939a11f06e0a488df8cfe19fe87bebc0b9e3016ef25f846476439

SHA512
7412a76fd3ed5d1e0c20fd937a2efbe03517f19c75eae877f742b47c1574dd19e97fd6412ef5579d2dfcbd12d6a026a15743600d53fd2cfb0029ed7182fb5cb5

Download Submit
memory/1712-1-0x00000000004B0000-0x00000000005B0000-memory.dmp

Filesize
1024KB

Download
memory/1712-2-0x0000000002080000-0x0000000002093000-memory.dmp

Filesize
76KB

Download
memory/1712-4-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1712-8-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/1712-9-0x0000000002080000-0x0000000002093000-memory.dmp

Filesize
76KB

Download
memory/2556-10-0x0000000000540000-0x0000000000640000-memory.dmp

Filesize
1024KB

Download
memory/2556-11-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/2556-17-0x0000000000400000-0x0000000000456000-memory.dmp

Filesize
344KB

Download
memory/4200-12-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download
memory/4200-15-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download
memory/4200-16-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download
memory/4200-18-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download
memory/4200-19-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads