tofsee | f4a987f3d011b577d1337927b964992a565cc0960a4324114852faba0768d0db

General

Target

4cd627b04650d91a492d524455aaa020.exe
Size

14.1MB
MD5

4cd627b04650d91a492d524455aaa020
SHA1

5e52edf351d46e60bf6350d469a494090c41689b
SHA256

f4a987f3d011b577d1337927b964992a565cc0960a4324114852faba0768d0db
SHA512

d51a2a331289b71da394d4699d1985690d1f0adfd9b3bda504d008cdb01d64d9a286c654a3d939c7306f3380419f8982cfb9c4a779101b789a2a0fab60052ec7
SSDEEP

49152:yvVGWdbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbH:yvV

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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
3632	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\snsuyxmm\ImagePath = "C:\\Windows\\SysWOW64\\snsuyxmm\\hhiqwrtf.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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	4cd627b04650d91a492d524455aaa020.exe

Deletes itself 1 IoCs

pid	Process
1872	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3180	hhiqwrtf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3180 set thread context of 1872	3180	hhiqwrtf.exe	111

Launches sc.exe 3 IoCs

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

pid	Process
4040	sc.exe
4108	sc.exe
3652	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
4580	3656	WerFault.exe	86
4472	3180	WerFault.exe	104

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3656 wrote to memory of 2304	3656	4cd627b04650d91a492d524455aaa020.exe	93
PID 3656 wrote to memory of 2304	3656	4cd627b04650d91a492d524455aaa020.exe	93
PID 3656 wrote to memory of 2304	3656	4cd627b04650d91a492d524455aaa020.exe	93
PID 3656 wrote to memory of 992	3656	4cd627b04650d91a492d524455aaa020.exe	95
PID 3656 wrote to memory of 992	3656	4cd627b04650d91a492d524455aaa020.exe	95
PID 3656 wrote to memory of 992	3656	4cd627b04650d91a492d524455aaa020.exe	95
PID 3656 wrote to memory of 3652	3656	4cd627b04650d91a492d524455aaa020.exe	98
PID 3656 wrote to memory of 3652	3656	4cd627b04650d91a492d524455aaa020.exe	98
PID 3656 wrote to memory of 3652	3656	4cd627b04650d91a492d524455aaa020.exe	98
PID 3656 wrote to memory of 4040	3656	4cd627b04650d91a492d524455aaa020.exe	100
PID 3656 wrote to memory of 4040	3656	4cd627b04650d91a492d524455aaa020.exe	100
PID 3656 wrote to memory of 4040	3656	4cd627b04650d91a492d524455aaa020.exe	100
PID 3656 wrote to memory of 4108	3656	4cd627b04650d91a492d524455aaa020.exe	103
PID 3656 wrote to memory of 4108	3656	4cd627b04650d91a492d524455aaa020.exe	103
PID 3656 wrote to memory of 4108	3656	4cd627b04650d91a492d524455aaa020.exe	103
PID 3656 wrote to memory of 3632	3656	4cd627b04650d91a492d524455aaa020.exe	105
PID 3656 wrote to memory of 3632	3656	4cd627b04650d91a492d524455aaa020.exe	105
PID 3656 wrote to memory of 3632	3656	4cd627b04650d91a492d524455aaa020.exe	105
PID 3180 wrote to memory of 1872	3180	hhiqwrtf.exe	111
PID 3180 wrote to memory of 1872	3180	hhiqwrtf.exe	111
PID 3180 wrote to memory of 1872	3180	hhiqwrtf.exe	111
PID 3180 wrote to memory of 1872	3180	hhiqwrtf.exe	111
PID 3180 wrote to memory of 1872	3180	hhiqwrtf.exe	111

C:\Users\Admin\AppData\Local\Temp\4cd627b04650d91a492d524455aaa020.exe
"C:\Users\Admin\AppData\Local\Temp\4cd627b04650d91a492d524455aaa020.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3656
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\snsuyxmm\
  2⤵
  PID:2304
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hhiqwrtf.exe" C:\Windows\SysWOW64\snsuyxmm\
  2⤵
  PID:992
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create snsuyxmm binPath= "C:\Windows\SysWOW64\snsuyxmm\hhiqwrtf.exe /d\"C:\Users\Admin\AppData\Local\Temp\4cd627b04650d91a492d524455aaa020.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3652
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description snsuyxmm "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start snsuyxmm
  2⤵
  - Launches sc.exe
  PID:4108
- 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:3632
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3656 -s 1200
  2⤵
  - Program crash
  PID:4580

C:\Windows\SysWOW64\snsuyxmm\hhiqwrtf.exe
C:\Windows\SysWOW64\snsuyxmm\hhiqwrtf.exe /d"C:\Users\Admin\AppData\Local\Temp\4cd627b04650d91a492d524455aaa020.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3180
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1872
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3180 -s 516
  2⤵
  - Program crash
  PID:4472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3656 -ip 3656
1⤵
PID:3100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3180 -ip 3180
1⤵
PID:3112

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\hhiqwrtf.exe

Filesize
1.2MB

MD5
f4d096ba0b9c59752e9efb0c41e7e063

SHA1
908583cc6318fd8c0e629a5a9c428127981c85ae

SHA256
29ac7f401994ef7683200af8f8ed0663e116de073de0f25081fb6c6a628893b0

SHA512
3d26c33fc3d507c0b8cf600807b370adb5b5ed369a13251782583d9078842b252085a938987a150c9afe5b897e12486823010841b45532d122d5c49856484953

Download Submit
C:\Windows\SysWOW64\snsuyxmm\hhiqwrtf.exe

Filesize
1.2MB

MD5
602ed61bf73c14d0b78e61cca2226d7c

SHA1
be5b6a2ab6fbc12f8330dcd47add3b9a83497941

SHA256
38bafd8447d96f001a2bcfb3eb6870b89d0701caa63157581e529bc7aebcc9eb

SHA512
5e041dfbf396a41329aa57db18223be9ecae700df707ed170e9b0f3132afbf7258c3fc99293a511cdac078af9b218febca1ae10463cf4b49d33738ab1c09a61c

Download Submit
memory/1872-14-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/1872-10-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/1872-15-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/1872-17-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/1872-18-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/3180-9-0x0000000000C70000-0x0000000000D70000-memory.dmp

Filesize
1024KB

Download
memory/3180-12-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/3180-16-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/3656-4-0x0000000000DC0000-0x0000000000DD3000-memory.dmp

Filesize
76KB

Download
memory/3656-3-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/3656-7-0x0000000000400000-0x0000000000C17000-memory.dmp

Filesize
8.1MB

Download
memory/3656-1-0x0000000000E60000-0x0000000000F60000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads