tofsee | 4535164ed531ecfc1624e721a866cd5997f95ef709ec8220d71133f88c7509ec

General

Target

e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe
Size

307KB
MD5

f4eb02f3a2587ba66f1036cae85e4770
SHA1

e8ed42963f946e33ec99af067eeabf0412436b62
SHA256

e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8
SHA512

6cfc6f6a07c5e36d678f9999ca9377549843f81cef9f23e3819c0dcde7d8f68668469c65c9690a6e8139c216f2b79058dc5255f5f8efa1def6bd7be2919e6719
SSDEEP

3072:TTgg3xOPn/SpLwMMrcDPXDzGkP2NakC5p+WrjxxMu63jXdo:gOOf/mLwMMrcDPXDzdvN+WvxajX

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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

Windows Service
T1543.003
Modifies Windows Firewall 2 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Disable or Modify System Firewall
T1562.004

Processes:

netsh.exe

pid process

3972 netsh.exe

pid	process
3972	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

Processes:

e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe

Executes dropped EXE 1 IoCs

Processes:

adwhhqrr.exe

pid process

3168 adwhhqrr.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

2336 sc.exe
1688 sc.exe
1864 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

8 3412 WerFault.exe e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe

pid	process
3168	adwhhqrr.exe

pid	process
2336	sc.exe
1688	sc.exe
1864	sc.exe

pid	pid_target	process	target process
8	3412	WerFault.exe	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe

description	pid	process	target process
PID 3412 wrote to memory of 4052	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	cmd.exe
PID 3412 wrote to memory of 4052	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	cmd.exe
PID 3412 wrote to memory of 4052	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	cmd.exe
PID 3412 wrote to memory of 4332	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	cmd.exe
PID 3412 wrote to memory of 4332	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	cmd.exe
PID 3412 wrote to memory of 4332	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	cmd.exe
PID 3412 wrote to memory of 2336	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 2336	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 2336	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 1688	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 1688	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 1688	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 1864	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 1864	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 1864	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	sc.exe
PID 3412 wrote to memory of 3972	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	netsh.exe
PID 3412 wrote to memory of 3972	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	netsh.exe
PID 3412 wrote to memory of 3972	3412	e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe
"C:\Users\Admin\AppData\Local\Temp\e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3412

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xncuqonv\
2⤵
PID:4052

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\adwhhqrr.exe" C:\Windows\SysWOW64\xncuqonv\
2⤵
PID:4332

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xncuqonv binPath= "C:\Windows\SysWOW64\xncuqonv\adwhhqrr.exe /d\"C:\Users\Admin\AppData\Local\Temp\e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:2336

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xncuqonv "wifi internet conection"
2⤵
- Launches sc.exe
PID:1688

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xncuqonv
2⤵
- Launches sc.exe
PID:1864

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:3972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3412 -s 920
2⤵
- Program crash
PID:8

C:\Windows\SysWOW64\xncuqonv\adwhhqrr.exe
C:\Windows\SysWOW64\xncuqonv\adwhhqrr.exe /d"C:\Users\Admin\AppData\Local\Temp\e78128c2073dd834976128e47d671edf32ce7e86820bec6b1d1837d58cd7b4e8.exe"
1⤵
- Executes dropped EXE
PID:3168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3412 -ip 3412
1⤵
PID:1664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

1

T1562.004

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\adwhhqrr.exe
Filesize
14.4MB

MD5
f66528502e43b273e6d545c91fc19218

SHA1
0bc3581d6cca7e96c5162a2c48546ece409004aa

SHA256
58a2f9e29491303188f6b365644a47544b334c9d100a467ed1801f868b5c897b

SHA512
6f1eaa296534a0b89ff87adb446f064db3eec19c533858605349a5f247e7ee4c0451e41aa90094fe361a6b8dc1b966a7e2792ef91b76ed37e6b6bfb437e67638

Download Submit
memory/3412-1-0x0000000002C60000-0x0000000002D60000-memory.dmp

Filesize
1024KB

Download
memory/3412-2-0x0000000002BA0000-0x0000000002BB3000-memory.dmp

Filesize
76KB

Download
memory/3412-4-0x0000000000400000-0x0000000002AC2000-memory.dmp

Filesize
38.8MB

Download
memory/3412-7-0x0000000000400000-0x0000000002AC2000-memory.dmp

Filesize
38.8MB

Download
memory/3412-8-0x0000000002BA0000-0x0000000002BB3000-memory.dmp

Filesize
76KB

Download

Analysis

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