tofsee | 4cac9e3b3d8e0446cbbe43456e8b44bf8b4cd0ac99f9c00552904c623fb03e3c

General

Target

75e5182964f42c0b0761107ea401338d.exe
Size

10.5MB
MD5

75e5182964f42c0b0761107ea401338d
SHA1

1095924492b72640c229e9712b69fdbb94681d8e
SHA256

4cac9e3b3d8e0446cbbe43456e8b44bf8b4cd0ac99f9c00552904c623fb03e3c
SHA512

3230af9491cfee8a4358ba465f928d18b3c9c869af36501eaf228b6f6d15c0cd380609254ce12e4ef2585fd2828e31b4e626fea11b33b23bf45a66f2a3fc6b0a
SSDEEP

98304:ivjOF//////////////////////////////////////////////////////////H:0

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

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
2348	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\oilpcyfn\ImagePath = "C:\\Windows\\SysWOW64\\oilpcyfn\\dmgldcxt.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	75e5182964f42c0b0761107ea401338d.exe

Deletes itself 1 IoCs

pid	Process
3976	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2636	dmgldcxt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2636 set thread context of 3976	2636	dmgldcxt.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
1496	sc.exe
1828	sc.exe
1052	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
3716	1196	WerFault.exe	88
3532	2636	WerFault.exe	104

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1196 wrote to memory of 780	1196	75e5182964f42c0b0761107ea401338d.exe	91
PID 1196 wrote to memory of 780	1196	75e5182964f42c0b0761107ea401338d.exe	91
PID 1196 wrote to memory of 780	1196	75e5182964f42c0b0761107ea401338d.exe	91
PID 1196 wrote to memory of 864	1196	75e5182964f42c0b0761107ea401338d.exe	93
PID 1196 wrote to memory of 864	1196	75e5182964f42c0b0761107ea401338d.exe	93
PID 1196 wrote to memory of 864	1196	75e5182964f42c0b0761107ea401338d.exe	93
PID 1196 wrote to memory of 1496	1196	75e5182964f42c0b0761107ea401338d.exe	95
PID 1196 wrote to memory of 1496	1196	75e5182964f42c0b0761107ea401338d.exe	95
PID 1196 wrote to memory of 1496	1196	75e5182964f42c0b0761107ea401338d.exe	95
PID 1196 wrote to memory of 1828	1196	75e5182964f42c0b0761107ea401338d.exe	97
PID 1196 wrote to memory of 1828	1196	75e5182964f42c0b0761107ea401338d.exe	97
PID 1196 wrote to memory of 1828	1196	75e5182964f42c0b0761107ea401338d.exe	97
PID 1196 wrote to memory of 1052	1196	75e5182964f42c0b0761107ea401338d.exe	99
PID 1196 wrote to memory of 1052	1196	75e5182964f42c0b0761107ea401338d.exe	99
PID 1196 wrote to memory of 1052	1196	75e5182964f42c0b0761107ea401338d.exe	99
PID 1196 wrote to memory of 2348	1196	75e5182964f42c0b0761107ea401338d.exe	101
PID 1196 wrote to memory of 2348	1196	75e5182964f42c0b0761107ea401338d.exe	101
PID 1196 wrote to memory of 2348	1196	75e5182964f42c0b0761107ea401338d.exe	101
PID 2636 wrote to memory of 3976	2636	dmgldcxt.exe	107
PID 2636 wrote to memory of 3976	2636	dmgldcxt.exe	107
PID 2636 wrote to memory of 3976	2636	dmgldcxt.exe	107
PID 2636 wrote to memory of 3976	2636	dmgldcxt.exe	107
PID 2636 wrote to memory of 3976	2636	dmgldcxt.exe	107

C:\Users\Admin\AppData\Local\Temp\75e5182964f42c0b0761107ea401338d.exe
"C:\Users\Admin\AppData\Local\Temp\75e5182964f42c0b0761107ea401338d.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1196
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oilpcyfn\
  2⤵
  PID:780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dmgldcxt.exe" C:\Windows\SysWOW64\oilpcyfn\
  2⤵
  PID:864
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create oilpcyfn binPath= "C:\Windows\SysWOW64\oilpcyfn\dmgldcxt.exe /d\"C:\Users\Admin\AppData\Local\Temp\75e5182964f42c0b0761107ea401338d.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1496
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description oilpcyfn "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1828
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start oilpcyfn
  2⤵
  - Launches sc.exe
  PID:1052
- 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:2348
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1196 -s 660
  2⤵
  - Program crash
  PID:3716

C:\Windows\SysWOW64\oilpcyfn\dmgldcxt.exe
C:\Windows\SysWOW64\oilpcyfn\dmgldcxt.exe /d"C:\Users\Admin\AppData\Local\Temp\75e5182964f42c0b0761107ea401338d.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3976
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2636 -s 512
  2⤵
  - Program crash
  PID:3532

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1196 -ip 1196
1⤵
PID:5088

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2636 -ip 2636
1⤵
PID:4760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
14.0MB

MD5
cd37560b13db65f227611fe491116a8d

SHA1
c258859a62a94f43391d15d42afc65858ec03985

SHA256
bef43b28fa118a46957380bfd7289a14dd04a0b603ab26236ce6feefe8312e51

SHA512
0fb0f023acf149fde51f9515414b4e8ab630a3f7a2ee21333ddca0f951a2ec77111c64b04c257595cbf0c74fce3fdfa44ec44641fea9a2016e363edafc0da439

Download Submit
memory/1196-1-0x0000000000CF0000-0x0000000000DF0000-memory.dmp

Filesize
1024KB

Download
memory/1196-2-0x0000000002960000-0x0000000002973000-memory.dmp

Filesize
76KB

Download
memory/1196-4-0x0000000000400000-0x0000000000C1F000-memory.dmp

Filesize
8.1MB

Download
memory/1196-8-0x0000000000400000-0x0000000000C1F000-memory.dmp

Filesize
8.1MB

Download
memory/1196-9-0x0000000002960000-0x0000000002973000-memory.dmp

Filesize
76KB

Download
memory/2636-11-0x0000000000E50000-0x0000000000F50000-memory.dmp

Filesize
1024KB

Download
memory/2636-16-0x0000000000400000-0x0000000000C1F000-memory.dmp

Filesize
8.1MB

Download
memory/2636-17-0x0000000000400000-0x0000000000C1F000-memory.dmp

Filesize
8.1MB

Download
memory/3976-12-0x00000000001C0000-0x00000000001D5000-memory.dmp

Filesize
84KB

Download
memory/3976-15-0x00000000001C0000-0x00000000001D5000-memory.dmp

Filesize
84KB

Download
memory/3976-18-0x00000000001C0000-0x00000000001D5000-memory.dmp

Filesize
84KB

Download
memory/3976-19-0x00000000001C0000-0x00000000001D5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads