tofsee | a6f0edcc4248c96cf33015626c80868eb1c9ed47198317c7add48ce23638c83f

Analysis

max time kernel
144s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24/02/2024, 22:24

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General

Target

a2dac4450c8268e2c3ab41b28da9f6de.exe
Size

13.3MB
MD5

a2dac4450c8268e2c3ab41b28da9f6de
SHA1

4c112829564be4fd7208b5388b641a8ab68eefb7
SHA256

a6f0edcc4248c96cf33015626c80868eb1c9ed47198317c7add48ce23638c83f
SHA512

bc58ad5a68d7f3238bc59d775b28fc195859f3b42f20cf12dc8748d7f2e4e5d25d7080cc260990262f5d5760ecf51be5d9330c5a4bea7e886c33959bb6c33f82
SSDEEP

196608:5V8YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY/:

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\faibcig = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2224	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\faibcig\ImagePath = "C:\\Windows\\SysWOW64\\faibcig\\czwugrgu.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
2928	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2840	czwugrgu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2840 set thread context of 2928	2840	czwugrgu.exe	41

Launches sc.exe 3 IoCs

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

pid	Process
2680	sc.exe
2732	sc.exe
2740	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 2160 wrote to memory of 2068	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	28
PID 2160 wrote to memory of 2068	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	28
PID 2160 wrote to memory of 2068	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	28
PID 2160 wrote to memory of 2068	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	28
PID 2160 wrote to memory of 2684	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	30
PID 2160 wrote to memory of 2684	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	30
PID 2160 wrote to memory of 2684	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	30
PID 2160 wrote to memory of 2684	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	30
PID 2160 wrote to memory of 2680	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	32
PID 2160 wrote to memory of 2680	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	32
PID 2160 wrote to memory of 2680	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	32
PID 2160 wrote to memory of 2680	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	32
PID 2160 wrote to memory of 2732	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	34
PID 2160 wrote to memory of 2732	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	34
PID 2160 wrote to memory of 2732	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	34
PID 2160 wrote to memory of 2732	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	34
PID 2160 wrote to memory of 2740	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	36
PID 2160 wrote to memory of 2740	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	36
PID 2160 wrote to memory of 2740	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	36
PID 2160 wrote to memory of 2740	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	36
PID 2160 wrote to memory of 2224	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	39
PID 2160 wrote to memory of 2224	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	39
PID 2160 wrote to memory of 2224	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	39
PID 2160 wrote to memory of 2224	2160	a2dac4450c8268e2c3ab41b28da9f6de.exe	39
PID 2840 wrote to memory of 2928	2840	czwugrgu.exe	41
PID 2840 wrote to memory of 2928	2840	czwugrgu.exe	41
PID 2840 wrote to memory of 2928	2840	czwugrgu.exe	41
PID 2840 wrote to memory of 2928	2840	czwugrgu.exe	41
PID 2840 wrote to memory of 2928	2840	czwugrgu.exe	41
PID 2840 wrote to memory of 2928	2840	czwugrgu.exe	41

C:\Users\Admin\AppData\Local\Temp\a2dac4450c8268e2c3ab41b28da9f6de.exe
"C:\Users\Admin\AppData\Local\Temp\a2dac4450c8268e2c3ab41b28da9f6de.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\faibcig\
  2⤵
  PID:2068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\czwugrgu.exe" C:\Windows\SysWOW64\faibcig\
  2⤵
  PID:2684
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create faibcig binPath= "C:\Windows\SysWOW64\faibcig\czwugrgu.exe /d\"C:\Users\Admin\AppData\Local\Temp\a2dac4450c8268e2c3ab41b28da9f6de.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description faibcig "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2732
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start faibcig
  2⤵
  - Launches sc.exe
  PID:2740
- 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:2224

C:\Windows\SysWOW64\faibcig\czwugrgu.exe
C:\Windows\SysWOW64\faibcig\czwugrgu.exe /d"C:\Users\Admin\AppData\Local\Temp\a2dac4450c8268e2c3ab41b28da9f6de.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Windows security bypass
  - Sets service image path in registry
  - Deletes itself
  PID:2928

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 System Firewall

T1562.004

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\czwugrgu.exe

Filesize
13.8MB

MD5
a0ec1189cb975b49843ca9a3375a97aa

SHA1
8d09d25080a225425ae1f3d1a605f86b058c723e

SHA256
4767d6601850313fd5cf1d35f2e10439beb4bb1c19a7f4d8f6214c78ec5bd063

SHA512
ed7f88ce0e62fc830621d5637afb0a8021e3c6b24c37b65e2b34a0ba83889b3cf2f07e20eb4f694da287feadc28de43d45aa07babd907a5d84de48823791ac2c

Download Submit
memory/2160-1-0x0000000000970000-0x0000000000A70000-memory.dmp

Filesize
1024KB

Download
memory/2160-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2160-4-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/2160-8-0x00000000002B0000-0x00000000002C3000-memory.dmp

Filesize
76KB

Download
memory/2160-7-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/2840-10-0x0000000000A00000-0x0000000000B00000-memory.dmp

Filesize
1024KB

Download
memory/2840-11-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/2840-16-0x0000000000400000-0x00000000008EA000-memory.dmp

Filesize
4.9MB

Download
memory/2928-12-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2928-15-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2928-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2928-20-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2928-21-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/2928-22-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads