tofsee | 3f3c63071ab9751ad62d9ebe72017d51a5bb99aac712fb291aa1bcbd6b10d62f

Analysis

max time kernel
149s
max time network
123s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30/12/2023, 13:17

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

19b941ca46e34d47ec52dc3248c1cfb4.exe
Size

12.8MB
MD5

19b941ca46e34d47ec52dc3248c1cfb4
SHA1

5f50bf90cf8cbaeb31db2258b6ee869bba723462
SHA256

3f3c63071ab9751ad62d9ebe72017d51a5bb99aac712fb291aa1bcbd6b10d62f
SHA512

4e15d47c7ca273606bf0a57a4442ca96b6149cc765dab98da0b6757736cca97e50fa1e6a7e1a58a89dbed471ceafc3597a5339bc9bb764cc53ef37ad89d79e9a
SSDEEP

49152:gj5555555555555555555555555555555555555555555555555555555555555b:

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\wzkyccrs = "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
2904	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\wzkyccrs\ImagePath = "C:\\Windows\\SysWOW64\\wzkyccrs\\ziaziuyp.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2596	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2636	ziaziuyp.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2636 set thread context of 2596	2636	ziaziuyp.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2752	sc.exe
2332	sc.exe
2692	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 2028 wrote to memory of 860	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	28
PID 2028 wrote to memory of 860	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	28
PID 2028 wrote to memory of 860	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	28
PID 2028 wrote to memory of 860	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	28
PID 2028 wrote to memory of 2764	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	30
PID 2028 wrote to memory of 2764	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	30
PID 2028 wrote to memory of 2764	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	30
PID 2028 wrote to memory of 2764	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	30
PID 2028 wrote to memory of 2752	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	32
PID 2028 wrote to memory of 2752	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	32
PID 2028 wrote to memory of 2752	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	32
PID 2028 wrote to memory of 2752	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	32
PID 2028 wrote to memory of 2332	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	34
PID 2028 wrote to memory of 2332	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	34
PID 2028 wrote to memory of 2332	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	34
PID 2028 wrote to memory of 2332	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	34
PID 2028 wrote to memory of 2692	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	36
PID 2028 wrote to memory of 2692	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	36
PID 2028 wrote to memory of 2692	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	36
PID 2028 wrote to memory of 2692	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	36
PID 2028 wrote to memory of 2904	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	38
PID 2028 wrote to memory of 2904	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	38
PID 2028 wrote to memory of 2904	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	38
PID 2028 wrote to memory of 2904	2028	19b941ca46e34d47ec52dc3248c1cfb4.exe	38
PID 2636 wrote to memory of 2596	2636	ziaziuyp.exe	41
PID 2636 wrote to memory of 2596	2636	ziaziuyp.exe	41
PID 2636 wrote to memory of 2596	2636	ziaziuyp.exe	41
PID 2636 wrote to memory of 2596	2636	ziaziuyp.exe	41
PID 2636 wrote to memory of 2596	2636	ziaziuyp.exe	41
PID 2636 wrote to memory of 2596	2636	ziaziuyp.exe	41

C:\Users\Admin\AppData\Local\Temp\19b941ca46e34d47ec52dc3248c1cfb4.exe
"C:\Users\Admin\AppData\Local\Temp\19b941ca46e34d47ec52dc3248c1cfb4.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wzkyccrs\
  2⤵
  PID:860
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ziaziuyp.exe" C:\Windows\SysWOW64\wzkyccrs\
  2⤵
  PID:2764
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wzkyccrs binPath= "C:\Windows\SysWOW64\wzkyccrs\ziaziuyp.exe /d\"C:\Users\Admin\AppData\Local\Temp\19b941ca46e34d47ec52dc3248c1cfb4.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2752
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wzkyccrs "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2332
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wzkyccrs
  2⤵
  - Launches sc.exe
  PID:2692
- 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:2904

C:\Windows\SysWOW64\wzkyccrs\ziaziuyp.exe
C:\Windows\SysWOW64\wzkyccrs\ziaziuyp.exe /d"C:\Users\Admin\AppData\Local\Temp\19b941ca46e34d47ec52dc3248c1cfb4.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2596

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
11.5MB

MD5
0d7381f69a6c57bd0d309d2540b21552

SHA1
8dd8aa188a2aa8848cdf10463736bec34e0cae13

SHA256
2ccd70f50ef79cdf7e3ff848c9df4bdb42dfd4819cfed1fdd1094504cc862e6c

SHA512
281fab293f1cc0dae5077db00e8960562a97875ca0438bb46857ef87c6aa8cb82e729ceb60442cbbf1b3f826f7a45c76d94a32850684f632658f52d8bc5f197f

Download Submit
C:\Windows\SysWOW64\wzkyccrs\ziaziuyp.exe

Filesize
5.9MB

MD5
5779ea05913b728ab0b8bed9617da1ed

SHA1
c6384d94ddeb37af9f56a1b72d643614c2193959

SHA256
a7ad37ea46dec2ddc2c19af3256f8f458428e32c08d2cd30d0ee6c3c3778789a

SHA512
ab1583fdc0861aceb2ae89cc7b68bbac2f93764a7bce0957fa5d6a19f1a383f4a71abbe0434dcc9d7ebfbce6f2f4d3c8a07bcae4f991293c4d6f68e76f66d5c5

Download Submit
memory/2028-1-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2028-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2028-6-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2028-3-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2028-0-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2596-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2596-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2596-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2596-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2596-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2596-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2596-19-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2636-9-0x00000000002E0000-0x00000000002E1000-memory.dmp

Filesize
4KB

Download
memory/2636-15-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2636-8-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads