tofsee | 189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232

General

Target

189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe
Size

11.7MB
MD5

0b9eaf5502101f33252e46846f4db5a5
SHA1

620b46abbe9d9e3884d28d85fe7b949c17538eda
SHA256

189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232
SHA512

23fda346f08da77d3158d0a9c464a382af17c9a5649ed4b89152dec01d2527ec0cb9f6d43d5b8decf7ebcf0d65e0906f69a2443e72605c4eb7f549a004ce378c
SSDEEP

3072:x8NYa2qJjULtTNupQyEC6pxhhfm5OcVi:xsRItTNKr2f45

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

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
3536	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\tdnbbrij\ImagePath = "C:\\Windows\\SysWOW64\\tdnbbrij\\wryvurno.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-1-5-21-2231940048-779848787-2990559741-1000\Control Panel\International\Geo\Nation	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe

Deletes itself 1 IoCs

pid	Process
1904	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3372	wryvurno.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3372 set thread context of 1904	3372	wryvurno.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
3508	sc.exe
1480	sc.exe
2228	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 2376 wrote to memory of 1468	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	87
PID 2376 wrote to memory of 1468	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	87
PID 2376 wrote to memory of 1468	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	87
PID 2376 wrote to memory of 1136	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	89
PID 2376 wrote to memory of 1136	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	89
PID 2376 wrote to memory of 1136	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	89
PID 2376 wrote to memory of 3508	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	91
PID 2376 wrote to memory of 3508	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	91
PID 2376 wrote to memory of 3508	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	91
PID 2376 wrote to memory of 1480	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	93
PID 2376 wrote to memory of 1480	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	93
PID 2376 wrote to memory of 1480	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	93
PID 2376 wrote to memory of 2228	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	97
PID 2376 wrote to memory of 2228	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	97
PID 2376 wrote to memory of 2228	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	97
PID 2376 wrote to memory of 3536	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	100
PID 2376 wrote to memory of 3536	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	100
PID 2376 wrote to memory of 3536	2376	189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe	100
PID 3372 wrote to memory of 1904	3372	wryvurno.exe	102
PID 3372 wrote to memory of 1904	3372	wryvurno.exe	102
PID 3372 wrote to memory of 1904	3372	wryvurno.exe	102
PID 3372 wrote to memory of 1904	3372	wryvurno.exe	102
PID 3372 wrote to memory of 1904	3372	wryvurno.exe	102

C:\Users\Admin\AppData\Local\Temp\189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe
"C:\Users\Admin\AppData\Local\Temp\189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tdnbbrij\
  2⤵
  PID:1468
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wryvurno.exe" C:\Windows\SysWOW64\tdnbbrij\
  2⤵
  PID:1136
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tdnbbrij binPath= "C:\Windows\SysWOW64\tdnbbrij\wryvurno.exe /d\"C:\Users\Admin\AppData\Local\Temp\189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3508
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tdnbbrij "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1480
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tdnbbrij
  2⤵
  - Launches sc.exe
  PID:2228
- 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:3536

C:\Windows\SysWOW64\tdnbbrij\wryvurno.exe
C:\Windows\SysWOW64\tdnbbrij\wryvurno.exe /d"C:\Users\Admin\AppData\Local\Temp\189c5efc65e3b28e3536ffb8616766b36115b058ceb6548c87bb3e4d3a5e0232.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3372
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1904

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\wryvurno.exe

Filesize
11.6MB

MD5
0d29877efb1b1f5e7f47ed36695f5700

SHA1
43b95d3af955120174159b78dade601a3a7a31e2

SHA256
f04d39d91a97e791ef8a199e003bcdd03ab8f5a931377ee4b53a9eae3e800ee8

SHA512
db91fdf9beeb69b20e20de14ac305083d96d058f40553a0d39af9bfce6edf4c4bf479ae58cf18be864d423490a48a45b0a7756f24787ed01c607d08638423f0c

Download Submit
C:\Windows\SysWOW64\tdnbbrij\wryvurno.exe

Filesize
11.6MB

MD5
0d29877efb1b1f5e7f47ed36695f5700

SHA1
43b95d3af955120174159b78dade601a3a7a31e2

SHA256
f04d39d91a97e791ef8a199e003bcdd03ab8f5a931377ee4b53a9eae3e800ee8

SHA512
db91fdf9beeb69b20e20de14ac305083d96d058f40553a0d39af9bfce6edf4c4bf479ae58cf18be864d423490a48a45b0a7756f24787ed01c607d08638423f0c

Download Submit
memory/1904-14-0x0000000000930000-0x0000000000945000-memory.dmp

Filesize
84KB

Download
memory/1904-16-0x0000000000930000-0x0000000000945000-memory.dmp

Filesize
84KB

Download
memory/1904-9-0x0000000000930000-0x0000000000945000-memory.dmp

Filesize
84KB

Download
memory/1904-15-0x0000000000930000-0x0000000000945000-memory.dmp

Filesize
84KB

Download
memory/2376-1-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2376-2-0x00000000009E0000-0x00000000009E1000-memory.dmp

Filesize
4KB

Download
memory/2376-5-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2376-0-0x00000000005D0000-0x00000000005D1000-memory.dmp

Filesize
4KB

Download
memory/3372-7-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3372-11-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3372-8-0x0000000000550000-0x0000000000551000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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