tofsee | c8825fc15985f67d823ba14758539eb7c21740d0038ecf1c4ac039419b9db767

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24/12/2023, 15:20

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General

Target

0380c83f5dcc93384bebd395babfeb23.exe
Size

11.5MB
MD5

0380c83f5dcc93384bebd395babfeb23
SHA1

252a232e6cfb6558591d46ec070c98874a08df7e
SHA256

c8825fc15985f67d823ba14758539eb7c21740d0038ecf1c4ac039419b9db767
SHA512

49c7632a69195c1dcb69e1d0e775c53d51c2778c514789aedbbd94a028f767bc4c59994d2e70f95e70f4d19a9b6f428c6ccb68512a27658f6e7c0b15f832a1e8
SSDEEP

98304:MNWUllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll:6W

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\wiokrzgl = "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
2604	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\wiokrzgl\ImagePath = "C:\\Windows\\SysWOW64\\wiokrzgl\\hygeojqe.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
1356	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2556	hygeojqe.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2556 set thread context of 1356	2556	hygeojqe.exe	43

Launches sc.exe 3 IoCs

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

pid	Process
2684	sc.exe
3008	sc.exe
2712	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 2260 wrote to memory of 2092	2260	0380c83f5dcc93384bebd395babfeb23.exe	29
PID 2260 wrote to memory of 2092	2260	0380c83f5dcc93384bebd395babfeb23.exe	29
PID 2260 wrote to memory of 2092	2260	0380c83f5dcc93384bebd395babfeb23.exe	29
PID 2260 wrote to memory of 2092	2260	0380c83f5dcc93384bebd395babfeb23.exe	29
PID 2260 wrote to memory of 2168	2260	0380c83f5dcc93384bebd395babfeb23.exe	30
PID 2260 wrote to memory of 2168	2260	0380c83f5dcc93384bebd395babfeb23.exe	30
PID 2260 wrote to memory of 2168	2260	0380c83f5dcc93384bebd395babfeb23.exe	30
PID 2260 wrote to memory of 2168	2260	0380c83f5dcc93384bebd395babfeb23.exe	30
PID 2260 wrote to memory of 2684	2260	0380c83f5dcc93384bebd395babfeb23.exe	33
PID 2260 wrote to memory of 2684	2260	0380c83f5dcc93384bebd395babfeb23.exe	33
PID 2260 wrote to memory of 2684	2260	0380c83f5dcc93384bebd395babfeb23.exe	33
PID 2260 wrote to memory of 2684	2260	0380c83f5dcc93384bebd395babfeb23.exe	33
PID 2260 wrote to memory of 3008	2260	0380c83f5dcc93384bebd395babfeb23.exe	34
PID 2260 wrote to memory of 3008	2260	0380c83f5dcc93384bebd395babfeb23.exe	34
PID 2260 wrote to memory of 3008	2260	0380c83f5dcc93384bebd395babfeb23.exe	34
PID 2260 wrote to memory of 3008	2260	0380c83f5dcc93384bebd395babfeb23.exe	34
PID 2260 wrote to memory of 2712	2260	0380c83f5dcc93384bebd395babfeb23.exe	36
PID 2260 wrote to memory of 2712	2260	0380c83f5dcc93384bebd395babfeb23.exe	36
PID 2260 wrote to memory of 2712	2260	0380c83f5dcc93384bebd395babfeb23.exe	36
PID 2260 wrote to memory of 2712	2260	0380c83f5dcc93384bebd395babfeb23.exe	36
PID 2260 wrote to memory of 2604	2260	0380c83f5dcc93384bebd395babfeb23.exe	38
PID 2260 wrote to memory of 2604	2260	0380c83f5dcc93384bebd395babfeb23.exe	38
PID 2260 wrote to memory of 2604	2260	0380c83f5dcc93384bebd395babfeb23.exe	38
PID 2260 wrote to memory of 2604	2260	0380c83f5dcc93384bebd395babfeb23.exe	38
PID 2556 wrote to memory of 1356	2556	hygeojqe.exe	43
PID 2556 wrote to memory of 1356	2556	hygeojqe.exe	43
PID 2556 wrote to memory of 1356	2556	hygeojqe.exe	43
PID 2556 wrote to memory of 1356	2556	hygeojqe.exe	43
PID 2556 wrote to memory of 1356	2556	hygeojqe.exe	43
PID 2556 wrote to memory of 1356	2556	hygeojqe.exe	43

C:\Users\Admin\AppData\Local\Temp\0380c83f5dcc93384bebd395babfeb23.exe
"C:\Users\Admin\AppData\Local\Temp\0380c83f5dcc93384bebd395babfeb23.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2260
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wiokrzgl\
  2⤵
  PID:2092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hygeojqe.exe" C:\Windows\SysWOW64\wiokrzgl\
  2⤵
  PID:2168
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create wiokrzgl binPath= "C:\Windows\SysWOW64\wiokrzgl\hygeojqe.exe /d\"C:\Users\Admin\AppData\Local\Temp\0380c83f5dcc93384bebd395babfeb23.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2684
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description wiokrzgl "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3008
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start wiokrzgl
  2⤵
  - Launches sc.exe
  PID:2712
- 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:2604

C:\Windows\SysWOW64\wiokrzgl\hygeojqe.exe
C:\Windows\SysWOW64\wiokrzgl\hygeojqe.exe /d"C:\Users\Admin\AppData\Local\Temp\0380c83f5dcc93384bebd395babfeb23.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2556
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:1356

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\hygeojqe.exe

Filesize
1.1MB

MD5
55bceb295fc331a1c6ee8324ca075b95

SHA1
e0c7c71e86e8e1ac43854999e605e66aba9d4783

SHA256
8134ebb5f41015d025c769a9b5c864045946961ee28861deeda720b8e4c82a88

SHA512
ff9e0026e2f0ca43540ccfed21b5e6e5ee17ae2be408027525f50ccea5f0ac051c4e97bff51106253d0543adba1e9a0e626c27d1169c9e9ea692569b4c463d84

Download Submit
C:\Windows\SysWOW64\wiokrzgl\hygeojqe.exe

Filesize
895KB

MD5
f73a6dc5336a6d1b7e0f83df10d4517a

SHA1
bf59542bb7c2f9cdeebcfcc0949218883490b335

SHA256
0db1e6799dbd1ab27434cd5f521277714f0590aeeb656cbfce97a6025ce3c84f

SHA512
44130cd32f45f838cbcad0d8f4fb423cfbe8124d67ad8a47591fda0652d29747320673857d00ae73ea280c1b8f3df24c30c6e1e97c7d1a1a79ec53ba38479dab

Download Submit
memory/1356-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1356-11-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1356-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1356-14-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1356-18-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1356-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1356-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2260-5-0x0000000000400000-0x00000000036CD000-memory.dmp

Filesize
50.8MB

Download
memory/2260-6-0x0000000000400000-0x00000000036CD000-memory.dmp

Filesize
50.8MB

Download
memory/2260-7-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2260-2-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/2260-1-0x0000000003880000-0x0000000003980000-memory.dmp

Filesize
1024KB

Download
memory/2556-10-0x00000000002B0000-0x00000000003B0000-memory.dmp

Filesize
1024KB

Download
memory/2556-19-0x0000000000400000-0x00000000036CD000-memory.dmp

Filesize
50.8MB

Download
memory/2556-17-0x0000000000400000-0x00000000036CD000-memory.dmp

Filesize
50.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads