tofsee | 9b67f3a84d397896a8119a69bf0f52a0013df1392ad7f76b525cdfa3320844c8

General

Target

d710da2c72712a5234c12cbc19c9ce38.exe
Size

10.2MB
MD5

d710da2c72712a5234c12cbc19c9ce38
SHA1

3287b628791bffbc35f07d8ad2d2257fcdcd931b
SHA256

9b67f3a84d397896a8119a69bf0f52a0013df1392ad7f76b525cdfa3320844c8
SHA512

69ec218075e472144947b246b0adb7f5487762a554118fc8f97e2a0e8275e5d33733ba8718c7d57e41517ab0697cc0679eebc9e1ffc5ad2f942707b924f01ba5
SSDEEP

196608:RvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvP:

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 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2788	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\vakxrefl\ImagePath = "C:\\Windows\\SysWOW64\\vakxrefl\\wrbesddl.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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	d710da2c72712a5234c12cbc19c9ce38.exe

Deletes itself 1 IoCs

pid	Process
1424	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
5076	wrbesddl.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5076 set thread context of 1424	5076	wrbesddl.exe	111

Launches sc.exe 3 IoCs

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

pid	Process
4200	sc.exe
4736	sc.exe
4748	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
3364	4948	WerFault.exe	86
4064	5076	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 2004	4948	d710da2c72712a5234c12cbc19c9ce38.exe	90
PID 4948 wrote to memory of 2004	4948	d710da2c72712a5234c12cbc19c9ce38.exe	90
PID 4948 wrote to memory of 2004	4948	d710da2c72712a5234c12cbc19c9ce38.exe	90
PID 4948 wrote to memory of 1248	4948	d710da2c72712a5234c12cbc19c9ce38.exe	92
PID 4948 wrote to memory of 1248	4948	d710da2c72712a5234c12cbc19c9ce38.exe	92
PID 4948 wrote to memory of 1248	4948	d710da2c72712a5234c12cbc19c9ce38.exe	92
PID 4948 wrote to memory of 4200	4948	d710da2c72712a5234c12cbc19c9ce38.exe	94
PID 4948 wrote to memory of 4200	4948	d710da2c72712a5234c12cbc19c9ce38.exe	94
PID 4948 wrote to memory of 4200	4948	d710da2c72712a5234c12cbc19c9ce38.exe	94
PID 4948 wrote to memory of 4736	4948	d710da2c72712a5234c12cbc19c9ce38.exe	96
PID 4948 wrote to memory of 4736	4948	d710da2c72712a5234c12cbc19c9ce38.exe	96
PID 4948 wrote to memory of 4736	4948	d710da2c72712a5234c12cbc19c9ce38.exe	96
PID 4948 wrote to memory of 4748	4948	d710da2c72712a5234c12cbc19c9ce38.exe	98
PID 4948 wrote to memory of 4748	4948	d710da2c72712a5234c12cbc19c9ce38.exe	98
PID 4948 wrote to memory of 4748	4948	d710da2c72712a5234c12cbc19c9ce38.exe	98
PID 4948 wrote to memory of 2788	4948	d710da2c72712a5234c12cbc19c9ce38.exe	101
PID 4948 wrote to memory of 2788	4948	d710da2c72712a5234c12cbc19c9ce38.exe	101
PID 4948 wrote to memory of 2788	4948	d710da2c72712a5234c12cbc19c9ce38.exe	101
PID 5076 wrote to memory of 1424	5076	wrbesddl.exe	111
PID 5076 wrote to memory of 1424	5076	wrbesddl.exe	111
PID 5076 wrote to memory of 1424	5076	wrbesddl.exe	111
PID 5076 wrote to memory of 1424	5076	wrbesddl.exe	111
PID 5076 wrote to memory of 1424	5076	wrbesddl.exe	111

C:\Users\Admin\AppData\Local\Temp\d710da2c72712a5234c12cbc19c9ce38.exe
"C:\Users\Admin\AppData\Local\Temp\d710da2c72712a5234c12cbc19c9ce38.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vakxrefl\
  2⤵
  PID:2004
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wrbesddl.exe" C:\Windows\SysWOW64\vakxrefl\
  2⤵
  PID:1248
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create vakxrefl binPath= "C:\Windows\SysWOW64\vakxrefl\wrbesddl.exe /d\"C:\Users\Admin\AppData\Local\Temp\d710da2c72712a5234c12cbc19c9ce38.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4200
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description vakxrefl "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start vakxrefl
  2⤵
  - Launches sc.exe
  PID:4748
- 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:2788
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4948 -s 788
  2⤵
  - Program crash
  PID:3364

C:\Windows\SysWOW64\vakxrefl\wrbesddl.exe
C:\Windows\SysWOW64\vakxrefl\wrbesddl.exe /d"C:\Users\Admin\AppData\Local\Temp\d710da2c72712a5234c12cbc19c9ce38.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5076
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5076 -s 520
  2⤵
  - Program crash
  PID:4064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4948 -ip 4948
1⤵
PID:1120

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 5076 -ip 5076
1⤵
PID:1456

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

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\wrbesddl.exe

Filesize
3.1MB

MD5
fd1cc907394b4d8e0d6654f1f3ead5f2

SHA1
56ff332fcb9a3996f2f82d52e1cb6a5b4ac35387

SHA256
20527cca593241b3020a9022a90d47a000f077374ea480af467b84e20edcf31b

SHA512
04217bd5c8a46c93736404e54b696ead2b3ea33f8a42fd25ce0fc2ff61c4b4c9fc9458b0771ee6d92f65e01138f5e40897cc7d9b8472592850cf86c60a429c9a

Download Submit
C:\Windows\SysWOW64\vakxrefl\wrbesddl.exe

Filesize
13.9MB

MD5
258182e65cda47706d70aadaeb68db7e

SHA1
1ef5ade0078982a73213ec67eb82c92ca555a7d2

SHA256
f2c015b8b92e4f2fcbfdc9eab48cc5ae77502723c31622f4ad40a9133c5ba31b

SHA512
dab1537ff6bbf4e31c85f1a59740136bc2fafc4252563e7962e2875d9d43d7299056c8d3f39dcbde6a694c7ecabb4938e01d50317cf30a4d7f3c670b34d26496

Download Submit
memory/1424-17-0x0000000000AF0000-0x0000000000B05000-memory.dmp

Filesize
84KB

Download
memory/1424-12-0x0000000000AF0000-0x0000000000B05000-memory.dmp

Filesize
84KB

Download
memory/1424-20-0x0000000000AF0000-0x0000000000B05000-memory.dmp

Filesize
84KB

Download
memory/1424-19-0x0000000000AF0000-0x0000000000B05000-memory.dmp

Filesize
84KB

Download
memory/1424-16-0x0000000000AF0000-0x0000000000B05000-memory.dmp

Filesize
84KB

Download
memory/4948-1-0x0000000002C80000-0x0000000002D80000-memory.dmp

Filesize
1024KB

Download
memory/4948-9-0x0000000004870000-0x0000000004883000-memory.dmp

Filesize
76KB

Download
memory/4948-4-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/4948-8-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/4948-2-0x0000000004870000-0x0000000004883000-memory.dmp

Filesize
76KB

Download
memory/5076-11-0x0000000002E50000-0x0000000002F50000-memory.dmp

Filesize
1024KB

Download
memory/5076-13-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/5076-10-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download
memory/5076-18-0x0000000000400000-0x0000000002C6D000-memory.dmp

Filesize
40.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads