tofsee | a5186d8788910d7091812b8a7db89167ffc09d670d73d5dd9a08287f8cfabb1b

Analysis

max time kernel
147s
max time network
120s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
24/12/2023, 18:32

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General

Target

0c1a283b875898c9ce315ca6af4f281b.exe
Size

13.4MB
MD5

0c1a283b875898c9ce315ca6af4f281b
SHA1

77c4cafeed6fa62df677072593f3c3ec8ee95ae3
SHA256

a5186d8788910d7091812b8a7db89167ffc09d670d73d5dd9a08287f8cfabb1b
SHA512

04f4386034dfe5379af03fd474777c1789b96020804bb191d84a42beab1a37b61380f5ac1566f23283955fd58ac21dd76cf5ac05482a5294f58198c93221234b
SSDEEP

49152:anHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH:a

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.6

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\ubluyyil = "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
2600	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\ubluyyil\ImagePath = "C:\\Windows\\SysWOW64\\ubluyyil\\anmrbmsw.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2496	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2696	anmrbmsw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2696 set thread context of 2496	2696	anmrbmsw.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2340	sc.exe
2564	sc.exe
2660	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 2860 wrote to memory of 2636	2860	0c1a283b875898c9ce315ca6af4f281b.exe	29
PID 2860 wrote to memory of 2636	2860	0c1a283b875898c9ce315ca6af4f281b.exe	29
PID 2860 wrote to memory of 2636	2860	0c1a283b875898c9ce315ca6af4f281b.exe	29
PID 2860 wrote to memory of 2636	2860	0c1a283b875898c9ce315ca6af4f281b.exe	29
PID 2860 wrote to memory of 2320	2860	0c1a283b875898c9ce315ca6af4f281b.exe	31
PID 2860 wrote to memory of 2320	2860	0c1a283b875898c9ce315ca6af4f281b.exe	31
PID 2860 wrote to memory of 2320	2860	0c1a283b875898c9ce315ca6af4f281b.exe	31
PID 2860 wrote to memory of 2320	2860	0c1a283b875898c9ce315ca6af4f281b.exe	31
PID 2860 wrote to memory of 2340	2860	0c1a283b875898c9ce315ca6af4f281b.exe	33
PID 2860 wrote to memory of 2340	2860	0c1a283b875898c9ce315ca6af4f281b.exe	33
PID 2860 wrote to memory of 2340	2860	0c1a283b875898c9ce315ca6af4f281b.exe	33
PID 2860 wrote to memory of 2340	2860	0c1a283b875898c9ce315ca6af4f281b.exe	33
PID 2860 wrote to memory of 2564	2860	0c1a283b875898c9ce315ca6af4f281b.exe	35
PID 2860 wrote to memory of 2564	2860	0c1a283b875898c9ce315ca6af4f281b.exe	35
PID 2860 wrote to memory of 2564	2860	0c1a283b875898c9ce315ca6af4f281b.exe	35
PID 2860 wrote to memory of 2564	2860	0c1a283b875898c9ce315ca6af4f281b.exe	35
PID 2860 wrote to memory of 2660	2860	0c1a283b875898c9ce315ca6af4f281b.exe	37
PID 2860 wrote to memory of 2660	2860	0c1a283b875898c9ce315ca6af4f281b.exe	37
PID 2860 wrote to memory of 2660	2860	0c1a283b875898c9ce315ca6af4f281b.exe	37
PID 2860 wrote to memory of 2660	2860	0c1a283b875898c9ce315ca6af4f281b.exe	37
PID 2860 wrote to memory of 2600	2860	0c1a283b875898c9ce315ca6af4f281b.exe	39
PID 2860 wrote to memory of 2600	2860	0c1a283b875898c9ce315ca6af4f281b.exe	39
PID 2860 wrote to memory of 2600	2860	0c1a283b875898c9ce315ca6af4f281b.exe	39
PID 2860 wrote to memory of 2600	2860	0c1a283b875898c9ce315ca6af4f281b.exe	39
PID 2696 wrote to memory of 2496	2696	anmrbmsw.exe	41
PID 2696 wrote to memory of 2496	2696	anmrbmsw.exe	41
PID 2696 wrote to memory of 2496	2696	anmrbmsw.exe	41
PID 2696 wrote to memory of 2496	2696	anmrbmsw.exe	41
PID 2696 wrote to memory of 2496	2696	anmrbmsw.exe	41
PID 2696 wrote to memory of 2496	2696	anmrbmsw.exe	41

C:\Users\Admin\AppData\Local\Temp\0c1a283b875898c9ce315ca6af4f281b.exe
"C:\Users\Admin\AppData\Local\Temp\0c1a283b875898c9ce315ca6af4f281b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ubluyyil\
  2⤵
  PID:2636
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\anmrbmsw.exe" C:\Windows\SysWOW64\ubluyyil\
  2⤵
  PID:2320
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ubluyyil binPath= "C:\Windows\SysWOW64\ubluyyil\anmrbmsw.exe /d\"C:\Users\Admin\AppData\Local\Temp\0c1a283b875898c9ce315ca6af4f281b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2340
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ubluyyil "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2564
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ubluyyil
  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:2600

C:\Windows\SysWOW64\ubluyyil\anmrbmsw.exe
C:\Windows\SysWOW64\ubluyyil\anmrbmsw.exe /d"C:\Users\Admin\AppData\Local\Temp\0c1a283b875898c9ce315ca6af4f281b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2696
- 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:\Windows\SysWOW64\ubluyyil\anmrbmsw.exe

Filesize
92KB

MD5
5c953c1174737aad49cd65ec0408d806

SHA1
738d9b5e81c7c4a1769b6e08fecc9561285825c5

SHA256
ed7fdcb499fbcd1fbb5cb178eeb6856de7d16ae6a1c5378922d29f3f1c923ef7

SHA512
943e91a3d9103ce7f00b44bd0612002cc34ea92d4f5325b764ca132b054f04eaaf4b2e5cd97ed7e5288ab58843da6a1c06645c1cbd6def214e7e9b35d757cb0f

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

Filesize
84KB

Download
memory/2496-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2496-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

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

Filesize
84KB

Download
memory/2496-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

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

Filesize
84KB

Download
memory/2696-16-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2696-12-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2696-10-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/2860-1-0x0000000000D10000-0x0000000000E10000-memory.dmp

Filesize
1024KB

Download
memory/2860-3-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2860-7-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2860-4-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads