tofsee | 365774579036398a227dd43ab69bfb57221aa97700cd37e0bc7bd764420db839

General

Target

file.exe
Size

147KB
MD5

47ce9ed9195c4e612073ae5e1672e5b4
SHA1

59ce202ca406b8231beb7e21d93ef273723a66e0
SHA256

365774579036398a227dd43ab69bfb57221aa97700cd37e0bc7bd764420db839
SHA512

785bb50a883500b0dcbd11e59b6bcafa30a737c50b7dccc3502a29f4fb107fab98d954b51e123112b9692e4f8d9d300f5f81c1275389b9223acb22f149018e16
SSDEEP

3072:K+LFVOQgneprGk53rCVioI4owCnK1lDGD4x+99:LFVonkr/rgioI4owCn+IDD

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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

New Service
T1050

Executes dropped EXE 1 IoCs

pid	Process
220	ncqngmil.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4140	netsh.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	file.exe

Launches sc.exe 3 IoCs

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

pid	Process
1104	sc.exe
2628	sc.exe
2092	sc.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4012	4868	WerFault.exe	80

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4868 wrote to memory of 3400	4868	file.exe	81
PID 4868 wrote to memory of 3400	4868	file.exe	81
PID 4868 wrote to memory of 3400	4868	file.exe	81
PID 4868 wrote to memory of 2316	4868	file.exe	83
PID 4868 wrote to memory of 2316	4868	file.exe	83
PID 4868 wrote to memory of 2316	4868	file.exe	83
PID 4868 wrote to memory of 1104	4868	file.exe	85
PID 4868 wrote to memory of 1104	4868	file.exe	85
PID 4868 wrote to memory of 1104	4868	file.exe	85
PID 4868 wrote to memory of 2628	4868	file.exe	87
PID 4868 wrote to memory of 2628	4868	file.exe	87
PID 4868 wrote to memory of 2628	4868	file.exe	87
PID 4868 wrote to memory of 2092	4868	file.exe	89
PID 4868 wrote to memory of 2092	4868	file.exe	89
PID 4868 wrote to memory of 2092	4868	file.exe	89
PID 4868 wrote to memory of 4140	4868	file.exe	94
PID 4868 wrote to memory of 4140	4868	file.exe	94
PID 4868 wrote to memory of 4140	4868	file.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4868
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ahtpbhwn\
  2⤵
  PID:3400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ncqngmil.exe" C:\Windows\SysWOW64\ahtpbhwn\
  2⤵
  PID:2316
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ahtpbhwn binPath= "C:\Windows\SysWOW64\ahtpbhwn\ncqngmil.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1104
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ahtpbhwn "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2628
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ahtpbhwn
  2⤵
  - Launches sc.exe
  PID:2092
- 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:4140
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4868 -s 584
  2⤵
  - Program crash
  PID:4012

C:\Windows\SysWOW64\ahtpbhwn\ncqngmil.exe
C:\Windows\SysWOW64\ahtpbhwn\ncqngmil.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
PID:220
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:4352

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4868 -ip 4868
1⤵
PID:3296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 220 -ip 220
1⤵
PID:4648

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

Privilege Escalation

New Service

1

T1050

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
10.8MB

MD5
d11ce882ad0e49e35cbfd45718b5d24e

SHA1
7f23d44269a35f15a6ad06bfc4d8b59fa2abb718

SHA256
85c5430fec52ec4da2e649d040a672d8c97d22e8694f90133ede26a8c6b84656

SHA512
b3dcfaa4769c9e03acf3f0875f62b1182fc45451e5df845fcb9d17c6abd50448f4f5e86893ac657fb7bad834e3a446a89e63ece5510462962a461ab21524458f

Download Submit
C:\Windows\SysWOW64\ahtpbhwn\ncqngmil.exe

Filesize
10.8MB

MD5
d11ce882ad0e49e35cbfd45718b5d24e

SHA1
7f23d44269a35f15a6ad06bfc4d8b59fa2abb718

SHA256
85c5430fec52ec4da2e649d040a672d8c97d22e8694f90133ede26a8c6b84656

SHA512
b3dcfaa4769c9e03acf3f0875f62b1182fc45451e5df845fcb9d17c6abd50448f4f5e86893ac657fb7bad834e3a446a89e63ece5510462962a461ab21524458f

Download Submit
memory/220-145-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/220-144-0x00000000007A9000-0x00000000007B9000-memory.dmp

Filesize
64KB

Download
memory/4352-147-0x0000000001020000-0x0000000001035000-memory.dmp

Filesize
84KB

Download
memory/4868-132-0x00000000005DD000-0x00000000005ED000-memory.dmp

Filesize
64KB

Download
memory/4868-143-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/4868-134-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/4868-133-0x0000000000520000-0x0000000000533000-memory.dmp

Filesize
76KB

Download

Analysis

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