tofsee | aa04b3d9d58fd65c35da8d55a4ef05bf0fc33b1f349826fcae0c7c6b4ad0415a

General

Target

05ef9769c64b9e886e5278e450587dd4.exe
Size

13.9MB
MD5

05ef9769c64b9e886e5278e450587dd4
SHA1

c8dd39cf2725f1f4e778f1a3f40bbc54c12a072f
SHA256

aa04b3d9d58fd65c35da8d55a4ef05bf0fc33b1f349826fcae0c7c6b4ad0415a
SHA512

f7888b592715c1293195ae5a60d4206055cc1c96731f39d7e27b6ecc2609f9fd8884f5c890c6609cdfedde4fa32d04e9cc7b8e2885a1af3f617b7c3d81666279
SSDEEP

24576:yjDuKnh7YzbKBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBl:ynh

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
3816	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\irhywxle\ImagePath = "C:\\Windows\\SysWOW64\\irhywxle\\qqjwifeg.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	05ef9769c64b9e886e5278e450587dd4.exe

Executes dropped EXE 1 IoCs

pid	Process
4756	qqjwifeg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4756 set thread context of 5044	4756	qqjwifeg.exe	109

Launches sc.exe 3 IoCs

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

pid	Process
3832	sc.exe
3456	sc.exe
4876	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 3444	3044	05ef9769c64b9e886e5278e450587dd4.exe	95
PID 3044 wrote to memory of 3444	3044	05ef9769c64b9e886e5278e450587dd4.exe	95
PID 3044 wrote to memory of 3444	3044	05ef9769c64b9e886e5278e450587dd4.exe	95
PID 3044 wrote to memory of 2080	3044	05ef9769c64b9e886e5278e450587dd4.exe	97
PID 3044 wrote to memory of 2080	3044	05ef9769c64b9e886e5278e450587dd4.exe	97
PID 3044 wrote to memory of 2080	3044	05ef9769c64b9e886e5278e450587dd4.exe	97
PID 3044 wrote to memory of 3832	3044	05ef9769c64b9e886e5278e450587dd4.exe	100
PID 3044 wrote to memory of 3832	3044	05ef9769c64b9e886e5278e450587dd4.exe	100
PID 3044 wrote to memory of 3832	3044	05ef9769c64b9e886e5278e450587dd4.exe	100
PID 3044 wrote to memory of 3456	3044	05ef9769c64b9e886e5278e450587dd4.exe	102
PID 3044 wrote to memory of 3456	3044	05ef9769c64b9e886e5278e450587dd4.exe	102
PID 3044 wrote to memory of 3456	3044	05ef9769c64b9e886e5278e450587dd4.exe	102
PID 3044 wrote to memory of 4876	3044	05ef9769c64b9e886e5278e450587dd4.exe	104
PID 3044 wrote to memory of 4876	3044	05ef9769c64b9e886e5278e450587dd4.exe	104
PID 3044 wrote to memory of 4876	3044	05ef9769c64b9e886e5278e450587dd4.exe	104
PID 3044 wrote to memory of 3816	3044	05ef9769c64b9e886e5278e450587dd4.exe	106
PID 3044 wrote to memory of 3816	3044	05ef9769c64b9e886e5278e450587dd4.exe	106
PID 3044 wrote to memory of 3816	3044	05ef9769c64b9e886e5278e450587dd4.exe	106
PID 4756 wrote to memory of 5044	4756	qqjwifeg.exe	109
PID 4756 wrote to memory of 5044	4756	qqjwifeg.exe	109
PID 4756 wrote to memory of 5044	4756	qqjwifeg.exe	109
PID 4756 wrote to memory of 5044	4756	qqjwifeg.exe	109
PID 4756 wrote to memory of 5044	4756	qqjwifeg.exe	109

C:\Users\Admin\AppData\Local\Temp\05ef9769c64b9e886e5278e450587dd4.exe
"C:\Users\Admin\AppData\Local\Temp\05ef9769c64b9e886e5278e450587dd4.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\irhywxle\
  2⤵
  PID:3444
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qqjwifeg.exe" C:\Windows\SysWOW64\irhywxle\
  2⤵
  PID:2080
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create irhywxle binPath= "C:\Windows\SysWOW64\irhywxle\qqjwifeg.exe /d\"C:\Users\Admin\AppData\Local\Temp\05ef9769c64b9e886e5278e450587dd4.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3832
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description irhywxle "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3456
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start irhywxle
  2⤵
  - Launches sc.exe
  PID:4876
- 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:3816

C:\Windows\SysWOW64\irhywxle\qqjwifeg.exe
C:\Windows\SysWOW64\irhywxle\qqjwifeg.exe /d"C:\Users\Admin\AppData\Local\Temp\05ef9769c64b9e886e5278e450587dd4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4756
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:5044

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\qqjwifeg.exe

Filesize
14.8MB

MD5
ce8b94f5067e0af62b61668de0b27a78

SHA1
ad4cdcb763bf122c56a5258b28904672aecc0b53

SHA256
60a70f9f16cc47bb960e0872577bd998a241dcaf7950ee959c180ad25e5d93b9

SHA512
5fd0cec33ba0a38676791e81f293acc49c85a2ea57ff95ceeb8b2a7460a8fe77ff3c1c1c1338e38e54aac5606daed607dac22c02ef11e2c16f52b6e3260348a8

Download Submit
memory/3044-1-0x0000000000810000-0x0000000000910000-memory.dmp

Filesize
1024KB

Download
memory/3044-2-0x0000000000600000-0x0000000000613000-memory.dmp

Filesize
76KB

Download
memory/3044-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3044-5-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3044-8-0x0000000000810000-0x0000000000910000-memory.dmp

Filesize
1024KB

Download
memory/3044-9-0x0000000000600000-0x0000000000613000-memory.dmp

Filesize
76KB

Download
memory/3044-12-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4756-19-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4756-13-0x0000000000630000-0x0000000000730000-memory.dmp

Filesize
1024KB

Download
memory/4756-15-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/5044-18-0x0000000000950000-0x0000000000965000-memory.dmp

Filesize
84KB

Download
memory/5044-14-0x0000000000950000-0x0000000000965000-memory.dmp

Filesize
84KB

Download
memory/5044-20-0x0000000000950000-0x0000000000965000-memory.dmp

Filesize
84KB

Download
memory/5044-22-0x0000000000950000-0x0000000000965000-memory.dmp

Filesize
84KB

Download
memory/5044-29-0x0000000000950000-0x0000000000965000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads