tofsee | 26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41

General

Target

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe
Size

12.5MB
MD5

f5053c329648e5c62b1ecdb93d8eaaef
SHA1

9ffe4ab344356576b7d97f3067ec3cf03c9ab3f4
SHA256

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41
SHA512

e3a52d09f1133e380b649dda1d8a7998a4f111b735d5bff3b37028acfab829aaf4fbca5bb237d6c8ca63d3be8c2fadaa7e7a687e513dccbbf146af261cd351fc
SSDEEP

49152:ZvUWkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkQ:Z5

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Tofsee family
tofsee
Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

Processes:

netsh.exe

pid	Process
2376	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\arhomagy\ImagePath = "C:\\Windows\\SysWOW64\\arhomagy\\bupbfuf.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

Processes:

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
4540	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

bupbfuf.exe

pid	Process
4416	bupbfuf.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

bupbfuf.exe

description	pid	Process	procid_target
PID 4416 set thread context of 4540	4416	bupbfuf.exe	102

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
1944	sc.exe
2672	sc.exe
2808	sc.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

Processes:

netsh.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
4468	1912	WerFault.exe	81
2188	4416	WerFault.exe	94

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

cmd.execmd.exesc.exebupbfuf.exesvchost.exe26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exesc.exenetsh.exesc.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bupbfuf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exebupbfuf.exe

description	pid	Process	procid_target
PID 1912 wrote to memory of 2732	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	82
PID 1912 wrote to memory of 2732	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	82
PID 1912 wrote to memory of 2732	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	82
PID 1912 wrote to memory of 4332	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	84
PID 1912 wrote to memory of 4332	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	84
PID 1912 wrote to memory of 4332	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	84
PID 1912 wrote to memory of 1944	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	86
PID 1912 wrote to memory of 1944	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	86
PID 1912 wrote to memory of 1944	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	86
PID 1912 wrote to memory of 2672	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	90
PID 1912 wrote to memory of 2672	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	90
PID 1912 wrote to memory of 2672	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	90
PID 1912 wrote to memory of 2808	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	92
PID 1912 wrote to memory of 2808	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	92
PID 1912 wrote to memory of 2808	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	92
PID 1912 wrote to memory of 2376	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	97
PID 1912 wrote to memory of 2376	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	97
PID 1912 wrote to memory of 2376	1912	26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe	97
PID 4416 wrote to memory of 4540	4416	bupbfuf.exe	102
PID 4416 wrote to memory of 4540	4416	bupbfuf.exe	102
PID 4416 wrote to memory of 4540	4416	bupbfuf.exe	102
PID 4416 wrote to memory of 4540	4416	bupbfuf.exe	102
PID 4416 wrote to memory of 4540	4416	bupbfuf.exe	102

C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe
"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\arhomagy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2732
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bupbfuf.exe" C:\Windows\SysWOW64\arhomagy\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4332
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create arhomagy binPath= "C:\Windows\SysWOW64\arhomagy\bupbfuf.exe /d\"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1944
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description arhomagy "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2672
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start arhomagy
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2808
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:2376
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1912 -s 1036
  2⤵
  - Program crash
  PID:4468

C:\Windows\SysWOW64\arhomagy\bupbfuf.exe
C:\Windows\SysWOW64\arhomagy\bupbfuf.exe /d"C:\Users\Admin\AppData\Local\Temp\26c90589e776e8813b1565f25e1be69d5dd6ec98dfa9dfcc5c4e9db0493f4f41.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4416
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:4540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4416 -s 516
  2⤵
  - Program crash
  PID:2188

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1912 -ip 1912
1⤵
PID:3512

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4416 -ip 4416
1⤵
PID:4420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

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

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

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

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
10.3MB

MD5
5039abc3c7928ad87f04528d7a2aa731

SHA1
1d7449940f2ce03d918cfbb8de3b6b64f48e5b10

SHA256
fe434b6906e1d4f8ea4752ce498efd3b2007bfa34cb941bb8f452cde0ecd4319

SHA512
d2b5e76ce441c5658bbb420b8425797be2445833e938f4ba9c5c7ef05d97f1b0a167db30ac78f54205923832f869f1517e87b0d0d9a07e5fe6fb05db47a18bce

Download Submit
memory/1912-1-0x0000000002F30000-0x0000000003030000-memory.dmp

Filesize
1024KB

Download
memory/1912-2-0x0000000002F10000-0x0000000002F23000-memory.dmp

Filesize
76KB

Download
memory/1912-3-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1912-10-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1912-9-0x0000000002F10000-0x0000000002F23000-memory.dmp

Filesize
76KB

Download
memory/1912-8-0x0000000000400000-0x0000000002DA4000-memory.dmp

Filesize
41.6MB

Download
memory/4416-15-0x0000000000400000-0x0000000002DA4000-memory.dmp

Filesize
41.6MB

Download
memory/4540-11-0x00000000012E0000-0x00000000012F5000-memory.dmp

Filesize
84KB

Download
memory/4540-13-0x00000000012E0000-0x00000000012F5000-memory.dmp

Filesize
84KB

Download
memory/4540-14-0x00000000012E0000-0x00000000012F5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads