tofsee | ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e

Analysis

max time kernel
146s
max time network
133s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
14/11/2023, 19:00

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General

Target

ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe
Size

13.2MB
MD5

3328e6fe99f8cfe5b8acbaab0cb50fd0
SHA1

fcd53cf0cf6b7dc3fb623908525082500cdddc17
SHA256

ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e
SHA512

2cb03e94d20b5a3d0c6c81d51ec8b00988b65b2c372b21ae561ab0df3331e2bbc9973bece7c527aad4b61c08b1f33b0954e0cce92fd9bbff74c6c98f574d15c6
SSDEEP

3072:38NYa2qJjULtTNupQyEC6pxhhfm5OcVi:3sRItTNKr2f45

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\zerwsrbq = "0"	svchost.exe

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
2900	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\zerwsrbq\ImagePath = "C:\\Windows\\SysWOW64\\zerwsrbq\\ysurlhrw.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2496	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2664	ysurlhrw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2664 set thread context of 2496	2664	ysurlhrw.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2624	sc.exe
2660	sc.exe
2736	sc.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2132 wrote to memory of 2020	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	28
PID 2132 wrote to memory of 2020	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	28
PID 2132 wrote to memory of 2020	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	28
PID 2132 wrote to memory of 2020	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	28
PID 2132 wrote to memory of 2608	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	30
PID 2132 wrote to memory of 2608	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	30
PID 2132 wrote to memory of 2608	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	30
PID 2132 wrote to memory of 2608	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	30
PID 2132 wrote to memory of 2736	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	32
PID 2132 wrote to memory of 2736	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	32
PID 2132 wrote to memory of 2736	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	32
PID 2132 wrote to memory of 2736	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	32
PID 2132 wrote to memory of 2624	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	34
PID 2132 wrote to memory of 2624	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	34
PID 2132 wrote to memory of 2624	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	34
PID 2132 wrote to memory of 2624	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	34
PID 2132 wrote to memory of 2660	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	36
PID 2132 wrote to memory of 2660	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	36
PID 2132 wrote to memory of 2660	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	36
PID 2132 wrote to memory of 2660	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	36
PID 2132 wrote to memory of 2900	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	38
PID 2132 wrote to memory of 2900	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	38
PID 2132 wrote to memory of 2900	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	38
PID 2132 wrote to memory of 2900	2132	ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe	38
PID 2664 wrote to memory of 2496	2664	ysurlhrw.exe	41
PID 2664 wrote to memory of 2496	2664	ysurlhrw.exe	41
PID 2664 wrote to memory of 2496	2664	ysurlhrw.exe	41
PID 2664 wrote to memory of 2496	2664	ysurlhrw.exe	41
PID 2664 wrote to memory of 2496	2664	ysurlhrw.exe	41
PID 2664 wrote to memory of 2496	2664	ysurlhrw.exe	41

C:\Users\Admin\AppData\Local\Temp\ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe
"C:\Users\Admin\AppData\Local\Temp\ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2132
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zerwsrbq\
  2⤵
  PID:2020
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ysurlhrw.exe" C:\Windows\SysWOW64\zerwsrbq\
  2⤵
  PID:2608
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zerwsrbq binPath= "C:\Windows\SysWOW64\zerwsrbq\ysurlhrw.exe /d\"C:\Users\Admin\AppData\Local\Temp\ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2736
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zerwsrbq "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2624
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zerwsrbq
  2⤵
  - Launches sc.exe
  PID:2660
- 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:2900

C:\Windows\SysWOW64\zerwsrbq\ysurlhrw.exe
C:\Windows\SysWOW64\zerwsrbq\ysurlhrw.exe /d"C:\Users\Admin\AppData\Local\Temp\ae103e5b5c8ef0a895facd30ab6658ca00abff8604f751cc1429dd0ee3c19a9e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2496

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
13.4MB

MD5
499aeb43640d1b3d0e5aa4849361aacb

SHA1
a572fc416b176675ff9d30094a1fd8f47b52d7c0

SHA256
cc07c12cf46d5411a62bca83e3d55646d0b3ca9e24e411023c912a9acf9c19ef

SHA512
ba493d4b4565dc19ad03d80aa5733b7a229709334cb29f551ed344b961fed2d83984b4a0a66a7457742c49443654385dec8980cd8c76851f43404cbc64568fa2

Download Submit
C:\Windows\SysWOW64\zerwsrbq\ysurlhrw.exe

Filesize
13.4MB

MD5
499aeb43640d1b3d0e5aa4849361aacb

SHA1
a572fc416b176675ff9d30094a1fd8f47b52d7c0

SHA256
cc07c12cf46d5411a62bca83e3d55646d0b3ca9e24e411023c912a9acf9c19ef

SHA512
ba493d4b4565dc19ad03d80aa5733b7a229709334cb29f551ed344b961fed2d83984b4a0a66a7457742c49443654385dec8980cd8c76851f43404cbc64568fa2

Download Submit
memory/2132-1-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2132-2-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2132-5-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2132-0-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2496-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2496-9-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-16-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-17-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2664-8-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2664-7-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2664-13-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads