tofsee | 81c24a66dbb0f2f3c18d2d88f300fb0c93915af3f2f908b4659665a344d92a36

General

Target

5a07cc8e36f22b398224b6685f28475b.exe
Size

13.2MB
MD5

5a07cc8e36f22b398224b6685f28475b
SHA1

10dba11f9e2080f7bc2fb2da7a768eb9a4bde53f
SHA256

81c24a66dbb0f2f3c18d2d88f300fb0c93915af3f2f908b4659665a344d92a36
SHA512

1a1fa5ff1c2ea6d9caeee53d605d9c905ab2960a2238a7d8c89f45ea1f67cb85f83fcbb956bfbf8859e5fff6fff49b85b55c252c30c307e1a0639484f7878a92
SSDEEP

49152:rGvEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEn:rG

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
1836	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\oxynlxak\ImagePath = "C:\\Windows\\SysWOW64\\oxynlxak\\ldrftsic.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	5a07cc8e36f22b398224b6685f28475b.exe

Deletes itself 1 IoCs

pid	Process
2736	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2420	ldrftsic.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2420 set thread context of 2736	2420	ldrftsic.exe	111

Launches sc.exe 3 IoCs

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

pid	Process
3796	sc.exe
4504	sc.exe
4252	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
2260	3216	WerFault.exe	86
4260	2420	WerFault.exe	105

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3216 wrote to memory of 3160	3216	5a07cc8e36f22b398224b6685f28475b.exe	92
PID 3216 wrote to memory of 3160	3216	5a07cc8e36f22b398224b6685f28475b.exe	92
PID 3216 wrote to memory of 3160	3216	5a07cc8e36f22b398224b6685f28475b.exe	92
PID 3216 wrote to memory of 228	3216	5a07cc8e36f22b398224b6685f28475b.exe	94
PID 3216 wrote to memory of 228	3216	5a07cc8e36f22b398224b6685f28475b.exe	94
PID 3216 wrote to memory of 228	3216	5a07cc8e36f22b398224b6685f28475b.exe	94
PID 3216 wrote to memory of 4504	3216	5a07cc8e36f22b398224b6685f28475b.exe	96
PID 3216 wrote to memory of 4504	3216	5a07cc8e36f22b398224b6685f28475b.exe	96
PID 3216 wrote to memory of 4504	3216	5a07cc8e36f22b398224b6685f28475b.exe	96
PID 3216 wrote to memory of 4252	3216	5a07cc8e36f22b398224b6685f28475b.exe	98
PID 3216 wrote to memory of 4252	3216	5a07cc8e36f22b398224b6685f28475b.exe	98
PID 3216 wrote to memory of 4252	3216	5a07cc8e36f22b398224b6685f28475b.exe	98
PID 3216 wrote to memory of 3796	3216	5a07cc8e36f22b398224b6685f28475b.exe	100
PID 3216 wrote to memory of 3796	3216	5a07cc8e36f22b398224b6685f28475b.exe	100
PID 3216 wrote to memory of 3796	3216	5a07cc8e36f22b398224b6685f28475b.exe	100
PID 3216 wrote to memory of 1836	3216	5a07cc8e36f22b398224b6685f28475b.exe	102
PID 3216 wrote to memory of 1836	3216	5a07cc8e36f22b398224b6685f28475b.exe	102
PID 3216 wrote to memory of 1836	3216	5a07cc8e36f22b398224b6685f28475b.exe	102
PID 2420 wrote to memory of 2736	2420	ldrftsic.exe	111
PID 2420 wrote to memory of 2736	2420	ldrftsic.exe	111
PID 2420 wrote to memory of 2736	2420	ldrftsic.exe	111
PID 2420 wrote to memory of 2736	2420	ldrftsic.exe	111
PID 2420 wrote to memory of 2736	2420	ldrftsic.exe	111

C:\Users\Admin\AppData\Local\Temp\5a07cc8e36f22b398224b6685f28475b.exe
"C:\Users\Admin\AppData\Local\Temp\5a07cc8e36f22b398224b6685f28475b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3216
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oxynlxak\
  2⤵
  PID:3160
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ldrftsic.exe" C:\Windows\SysWOW64\oxynlxak\
  2⤵
  PID:228
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create oxynlxak binPath= "C:\Windows\SysWOW64\oxynlxak\ldrftsic.exe /d\"C:\Users\Admin\AppData\Local\Temp\5a07cc8e36f22b398224b6685f28475b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4504
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description oxynlxak "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4252
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start oxynlxak
  2⤵
  - Launches sc.exe
  PID:3796
- 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:1836
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3216 -s 652
  2⤵
  - Program crash
  PID:2260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3216 -ip 3216
1⤵
PID:3528

C:\Windows\SysWOW64\oxynlxak\ldrftsic.exe
C:\Windows\SysWOW64\oxynlxak\ldrftsic.exe /d"C:\Users\Admin\AppData\Local\Temp\5a07cc8e36f22b398224b6685f28475b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2420 -s 508
  2⤵
  - Program crash
  PID:4260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2420 -ip 2420
1⤵
PID:1572

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

Modify Registry

1

T1112

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\ldrftsic.exe

Filesize
10.5MB

MD5
a9273cb1e97c8c2b5d9c9133c020ce89

SHA1
fd33889518622a43673d1790272b5af341ad9dc0

SHA256
5916d6f0a4a2b0da03e93c1577da19e5730d331f11ce69ff1ac03ed8b059d2a6

SHA512
7c0dd914369223d59b5d1975532f3b53b08bc47e35f9549b0c05b8e9667382b5c8ddbb5154c408dd11e46e1e434bac0d85459a3f934b2568a79926252571df73

Download Submit
memory/2420-20-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2420-13-0x0000000000E40000-0x0000000000F40000-memory.dmp

Filesize
1024KB

Download
memory/2420-14-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2736-15-0x0000000000390000-0x00000000003A5000-memory.dmp

Filesize
84KB

Download
memory/2736-22-0x0000000000390000-0x00000000003A5000-memory.dmp

Filesize
84KB

Download
memory/2736-21-0x0000000000390000-0x00000000003A5000-memory.dmp

Filesize
84KB

Download
memory/2736-19-0x0000000000390000-0x00000000003A5000-memory.dmp

Filesize
84KB

Download
memory/2736-18-0x0000000000390000-0x00000000003A5000-memory.dmp

Filesize
84KB

Download
memory/3216-5-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/3216-9-0x0000000002960000-0x0000000002973000-memory.dmp

Filesize
76KB

Download
memory/3216-8-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/3216-1-0x0000000000CA0000-0x0000000000DA0000-memory.dmp

Filesize
1024KB

Download
memory/3216-3-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/3216-2-0x0000000002960000-0x0000000002973000-memory.dmp

Filesize
76KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads