tofsee | 2506360adfcecd45ae92155363fdaadd0d3fa888942cb1a3dc6251c05317726b

General

Target

5c377c45c77ff6a4746edfac21e2c069.exe
Size

11.5MB
MD5

5c377c45c77ff6a4746edfac21e2c069
SHA1

53cdb3538fbd9111031bfa5286fd4908a0b2ba8f
SHA256

2506360adfcecd45ae92155363fdaadd0d3fa888942cb1a3dc6251c05317726b
SHA512

7bf7e437b3aa39684723d8f4771c9f35d009925de9575acb449e4d649a949ea46b411b536e3ce6bf75b4e530a6349babbdb30edaf87eae4a5ed08b669261a5a5
SSDEEP

49152:/O2iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii6:/O

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
3612	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\xlkhptq\ImagePath = "C:\\Windows\\SysWOW64\\xlkhptq\\ttucidfr.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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	5c377c45c77ff6a4746edfac21e2c069.exe

Deletes itself 1 IoCs

pid	Process
1180	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3960	ttucidfr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3960 set thread context of 1180	3960	ttucidfr.exe	111

Launches sc.exe 3 IoCs

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

pid	Process
3732	sc.exe
3144	sc.exe
1992	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
4700	1480	WerFault.exe	86
2632	3960	WerFault.exe	104

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1480 wrote to memory of 904	1480	5c377c45c77ff6a4746edfac21e2c069.exe	94
PID 1480 wrote to memory of 904	1480	5c377c45c77ff6a4746edfac21e2c069.exe	94
PID 1480 wrote to memory of 904	1480	5c377c45c77ff6a4746edfac21e2c069.exe	94
PID 1480 wrote to memory of 1556	1480	5c377c45c77ff6a4746edfac21e2c069.exe	97
PID 1480 wrote to memory of 1556	1480	5c377c45c77ff6a4746edfac21e2c069.exe	97
PID 1480 wrote to memory of 1556	1480	5c377c45c77ff6a4746edfac21e2c069.exe	97
PID 1480 wrote to memory of 3144	1480	5c377c45c77ff6a4746edfac21e2c069.exe	99
PID 1480 wrote to memory of 3144	1480	5c377c45c77ff6a4746edfac21e2c069.exe	99
PID 1480 wrote to memory of 3144	1480	5c377c45c77ff6a4746edfac21e2c069.exe	99
PID 1480 wrote to memory of 1992	1480	5c377c45c77ff6a4746edfac21e2c069.exe	101
PID 1480 wrote to memory of 1992	1480	5c377c45c77ff6a4746edfac21e2c069.exe	101
PID 1480 wrote to memory of 1992	1480	5c377c45c77ff6a4746edfac21e2c069.exe	101
PID 1480 wrote to memory of 3732	1480	5c377c45c77ff6a4746edfac21e2c069.exe	103
PID 1480 wrote to memory of 3732	1480	5c377c45c77ff6a4746edfac21e2c069.exe	103
PID 1480 wrote to memory of 3732	1480	5c377c45c77ff6a4746edfac21e2c069.exe	103
PID 1480 wrote to memory of 3612	1480	5c377c45c77ff6a4746edfac21e2c069.exe	109
PID 1480 wrote to memory of 3612	1480	5c377c45c77ff6a4746edfac21e2c069.exe	109
PID 1480 wrote to memory of 3612	1480	5c377c45c77ff6a4746edfac21e2c069.exe	109
PID 3960 wrote to memory of 1180	3960	ttucidfr.exe	111
PID 3960 wrote to memory of 1180	3960	ttucidfr.exe	111
PID 3960 wrote to memory of 1180	3960	ttucidfr.exe	111
PID 3960 wrote to memory of 1180	3960	ttucidfr.exe	111
PID 3960 wrote to memory of 1180	3960	ttucidfr.exe	111

C:\Users\Admin\AppData\Local\Temp\5c377c45c77ff6a4746edfac21e2c069.exe
"C:\Users\Admin\AppData\Local\Temp\5c377c45c77ff6a4746edfac21e2c069.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1480
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xlkhptq\
  2⤵
  PID:904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ttucidfr.exe" C:\Windows\SysWOW64\xlkhptq\
  2⤵
  PID:1556
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create xlkhptq binPath= "C:\Windows\SysWOW64\xlkhptq\ttucidfr.exe /d\"C:\Users\Admin\AppData\Local\Temp\5c377c45c77ff6a4746edfac21e2c069.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3144
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description xlkhptq "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1992
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start xlkhptq
  2⤵
  - Launches sc.exe
  PID:3732
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 1260
  2⤵
  - Program crash
  PID:4700
- 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:3612

C:\Windows\SysWOW64\xlkhptq\ttucidfr.exe
C:\Windows\SysWOW64\xlkhptq\ttucidfr.exe /d"C:\Users\Admin\AppData\Local\Temp\5c377c45c77ff6a4746edfac21e2c069.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3960
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1180
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3960 -s 508
  2⤵
  - Program crash
  PID:2632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1480 -ip 1480
1⤵
PID:4760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3960 -ip 3960
1⤵
PID:3944

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\ttucidfr.exe

Filesize
2.4MB

MD5
2538a5e46fc6ec6c73ed7aaa108328c5

SHA1
368ced06f4475b8ab90f05a42fa4da6e4d83369f

SHA256
e313a913d3fccb5b2596ddcc7dedaebdaf7555c33d5af1ed5de253a5029eba5e

SHA512
0ffae1673f9b155038038100ba7393aaffd07cd059705f5e6d073094a338e3aa33c3dc0e445838773b15808ffe92cbcf52796f19e373f2ebaa0fd7c8220dee13

Download Submit
C:\Windows\SysWOW64\xlkhptq\ttucidfr.exe

Filesize
2.3MB

MD5
a86feb9e0a820ed37f19626d2c65e811

SHA1
4d1ca3b396694b816e482226fe4bf50bc09fdb74

SHA256
f63643371ec48ae5037358549534349b58349e7ee065c2f23e44f95ba8636415

SHA512
501cc3fcf0eddd432520286660b711457e2a7aa95cbcebbe3d5d77c26709f97fa186a8f5f4d2833cd31f901694d099198630cf1116864d0e8151bd77e727fc4b

Download Submit
memory/1180-16-0x0000000000960000-0x0000000000975000-memory.dmp

Filesize
84KB

Download
memory/1180-19-0x0000000000960000-0x0000000000975000-memory.dmp

Filesize
84KB

Download
memory/1180-10-0x0000000000960000-0x0000000000975000-memory.dmp

Filesize
84KB

Download
memory/1180-15-0x0000000000960000-0x0000000000975000-memory.dmp

Filesize
84KB

Download
memory/1180-18-0x0000000000960000-0x0000000000975000-memory.dmp

Filesize
84KB

Download
memory/1480-7-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/1480-1-0x0000000000AA0000-0x0000000000BA0000-memory.dmp

Filesize
1024KB

Download
memory/1480-8-0x0000000002640000-0x0000000002653000-memory.dmp

Filesize
76KB

Download
memory/1480-4-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/1480-2-0x0000000002640000-0x0000000002653000-memory.dmp

Filesize
76KB

Download
memory/3960-17-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/3960-13-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/3960-11-0x00000000009C0000-0x0000000000AC0000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads