tofsee | bab713fc344881c8e7a7b30a23b43fc8a2b0d21039b36c1691874d35a30dc24d

Analysis

max time kernel
140s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
27/03/2024, 08:36

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General

Target
e13dccc93268b6ecfa5ec147bc81de7e.exe
Size 10.1MB
Sample240327-khk2vsge34
SHA256 bab713fc344881c8e7a7b30a23b43fc8a2b0d21039b36c1691874d35a30dc24d
MD5 e13dccc93268b6ecfa5ec147bc81de7e
SHA1 af120c84e56bcc74a3b93be96f76cc40804ca701
SHA512 c26a7b4f05fe681d39be48c35d65a6956aa4b4a47e4ce03cb40da7de3726ab00bf66bcfc0b7996c86dfd1c99fb1b90ebb1f8f04d3cd83ec54b0e80a569aaf69f
SSDEEP 49152:31yvllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll:3A
MD5 SHA1 SHA512 SSDEEP

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
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
3952	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\mdhcjlof\ImagePath = "C:\\Windows\\SysWOW64\\mdhcjlof\\zcicrcnt.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	e13dccc93268b6ecfa5ec147bc81de7e.exe

Deletes itself 1 IoCs

pid	Process
2288	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4704	zcicrcnt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4704 set thread context of 2288	4704	zcicrcnt.exe	102

Launches sc.exe 3 IoCs

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

pid	Process
2036	sc.exe
2680	sc.exe
3524	sc.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4908	4556	WerFault.exe	85
3496	4704	WerFault.exe	96

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4556 wrote to memory of 2072	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	86
PID 4556 wrote to memory of 2072	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	86
PID 4556 wrote to memory of 2072	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	86
PID 4556 wrote to memory of 5044	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	88
PID 4556 wrote to memory of 5044	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	88
PID 4556 wrote to memory of 5044	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	88
PID 4556 wrote to memory of 2036	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	90
PID 4556 wrote to memory of 2036	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	90
PID 4556 wrote to memory of 2036	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	90
PID 4556 wrote to memory of 2680	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	92
PID 4556 wrote to memory of 2680	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	92
PID 4556 wrote to memory of 2680	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	92
PID 4556 wrote to memory of 3524	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	94
PID 4556 wrote to memory of 3524	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	94
PID 4556 wrote to memory of 3524	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	94
PID 4556 wrote to memory of 3952	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	97
PID 4556 wrote to memory of 3952	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	97
PID 4556 wrote to memory of 3952	4556	e13dccc93268b6ecfa5ec147bc81de7e.exe	97
PID 4704 wrote to memory of 2288	4704	zcicrcnt.exe	102
PID 4704 wrote to memory of 2288	4704	zcicrcnt.exe	102
PID 4704 wrote to memory of 2288	4704	zcicrcnt.exe	102
PID 4704 wrote to memory of 2288	4704	zcicrcnt.exe	102
PID 4704 wrote to memory of 2288	4704	zcicrcnt.exe	102

C:\Users\Admin\AppData\Local\Temp\e13dccc93268b6ecfa5ec147bc81de7e.exe
"C:\Users\Admin\AppData\Local\Temp\e13dccc93268b6ecfa5ec147bc81de7e.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4556
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mdhcjlof\
  2⤵
  PID:2072
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zcicrcnt.exe" C:\Windows\SysWOW64\mdhcjlof\
  2⤵
  PID:5044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create mdhcjlof binPath= "C:\Windows\SysWOW64\mdhcjlof\zcicrcnt.exe /d\"C:\Users\Admin\AppData\Local\Temp\e13dccc93268b6ecfa5ec147bc81de7e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2036
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description mdhcjlof "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start mdhcjlof
  2⤵
  - Launches sc.exe
  PID:3524
- 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:3952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4556 -s 1044
  2⤵
  - Program crash
  PID:4908

C:\Windows\SysWOW64\mdhcjlof\zcicrcnt.exe
C:\Windows\SysWOW64\mdhcjlof\zcicrcnt.exe /d"C:\Users\Admin\AppData\Local\Temp\e13dccc93268b6ecfa5ec147bc81de7e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2288
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4704 -s 516
  2⤵
  - Program crash
  PID:3496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4556 -ip 4556
1⤵
PID:4972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 4704 -ip 4704
1⤵
PID:3832

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

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

zcicrcnt.exe

Path C:\Users\Admin\AppData\Local\Temp\zcicrcnt.exe
Size 11.6MB
SHA256 e8735fee0989d216c0e77c7d9203d55a159d70e9842a1a7e36cd4bc8bb962703
MD5 a8bf56ed73393b7fc9d3c3759cdc7cf0
SHA1 aece8649577b520015366c7d49306f3dec49b125
SHA512 f85c94aca3128ff25da2cfd4486b5c4b73baa73325343a7c518f5ae765928bd7b539dd9f551e07b028c2446229637c439234b617bd6ae0b42d0a42dc7e1e7d28
SSDEEP 49152:L1yvllllllllllllllllllllllllllllllllllllllllllllllllllllllllllln:LA
MD5 SHA1 SHA512 SSDEEP

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memory/2288-10-0x0000000000C00000-0x0000000000C15000-memory.dmp

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memory/2288-16-0x0000000000C00000-0x0000000000C15000-memory.dmp

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memory/2288-17-0x0000000000C00000-0x0000000000C15000-memory.dmp

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memory/2288-19-0x0000000000C00000-0x0000000000C15000-memory.dmp

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memory/4556-1-0x0000000000CC0000-0x0000000000DC0000-memory.dmp

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memory/4556-2-0x0000000002960000-0x0000000002973000-memory.dmp

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memory/4556-4-0x0000000000400000-0x0000000000C20000-memory.dmp

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memory/4556-7-0x0000000000400000-0x0000000000C20000-memory.dmp

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memory/4556-8-0x0000000002960000-0x0000000002973000-memory.dmp

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memory/4704-12-0x0000000000F50000-0x0000000001050000-memory.dmp

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memory/4704-14-0x0000000000400000-0x0000000000C20000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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