tofsee | 7628868df077a2dd4e9f8453321e02a0929d4ef979d9774532a40d1abd2253e4

General

Target

1986f6ee9a935c96a465c400744c572e.exe
Size

13.2MB
MD5

1986f6ee9a935c96a465c400744c572e
SHA1

b5864a9dd6ce06c058b3d250887d17b4c3a8e379
SHA256

7628868df077a2dd4e9f8453321e02a0929d4ef979d9774532a40d1abd2253e4
SHA512

3d396c9ad0886878e560f0742476344af2d367444f4a58b5881772091bcf2b01a793b197a6ed588c8d7dfba84479fd83441d495b37109b3f93ac1ccc3afeb1c4
SSDEEP

24576:1jY+lg48SlJPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPv:wHSl

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
2776	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\kvovetkc\ImagePath = "C:\\Windows\\SysWOW64\\kvovetkc\\eojevvou.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	1986f6ee9a935c96a465c400744c572e.exe

Deletes itself 1 IoCs

pid	Process
4464	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1992	eojevvou.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1992 set thread context of 4464	1992	eojevvou.exe	110

Launches sc.exe 3 IoCs

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

pid	Process
552	sc.exe
4044	sc.exe
1848	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
3256	2924	WerFault.exe	89
4556	1992	WerFault.exe	108

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2924 wrote to memory of 3608	2924	1986f6ee9a935c96a465c400744c572e.exe	95
PID 2924 wrote to memory of 3608	2924	1986f6ee9a935c96a465c400744c572e.exe	95
PID 2924 wrote to memory of 3608	2924	1986f6ee9a935c96a465c400744c572e.exe	95
PID 2924 wrote to memory of 2456	2924	1986f6ee9a935c96a465c400744c572e.exe	97
PID 2924 wrote to memory of 2456	2924	1986f6ee9a935c96a465c400744c572e.exe	97
PID 2924 wrote to memory of 2456	2924	1986f6ee9a935c96a465c400744c572e.exe	97
PID 2924 wrote to memory of 4044	2924	1986f6ee9a935c96a465c400744c572e.exe	99
PID 2924 wrote to memory of 4044	2924	1986f6ee9a935c96a465c400744c572e.exe	99
PID 2924 wrote to memory of 4044	2924	1986f6ee9a935c96a465c400744c572e.exe	99
PID 2924 wrote to memory of 1848	2924	1986f6ee9a935c96a465c400744c572e.exe	101
PID 2924 wrote to memory of 1848	2924	1986f6ee9a935c96a465c400744c572e.exe	101
PID 2924 wrote to memory of 1848	2924	1986f6ee9a935c96a465c400744c572e.exe	101
PID 2924 wrote to memory of 552	2924	1986f6ee9a935c96a465c400744c572e.exe	103
PID 2924 wrote to memory of 552	2924	1986f6ee9a935c96a465c400744c572e.exe	103
PID 2924 wrote to memory of 552	2924	1986f6ee9a935c96a465c400744c572e.exe	103
PID 2924 wrote to memory of 2776	2924	1986f6ee9a935c96a465c400744c572e.exe	105
PID 2924 wrote to memory of 2776	2924	1986f6ee9a935c96a465c400744c572e.exe	105
PID 2924 wrote to memory of 2776	2924	1986f6ee9a935c96a465c400744c572e.exe	105
PID 1992 wrote to memory of 4464	1992	eojevvou.exe	110
PID 1992 wrote to memory of 4464	1992	eojevvou.exe	110
PID 1992 wrote to memory of 4464	1992	eojevvou.exe	110
PID 1992 wrote to memory of 4464	1992	eojevvou.exe	110
PID 1992 wrote to memory of 4464	1992	eojevvou.exe	110

C:\Users\Admin\AppData\Local\Temp\1986f6ee9a935c96a465c400744c572e.exe
"C:\Users\Admin\AppData\Local\Temp\1986f6ee9a935c96a465c400744c572e.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2924
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kvovetkc\
  2⤵
  PID:3608
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eojevvou.exe" C:\Windows\SysWOW64\kvovetkc\
  2⤵
  PID:2456
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kvovetkc binPath= "C:\Windows\SysWOW64\kvovetkc\eojevvou.exe /d\"C:\Users\Admin\AppData\Local\Temp\1986f6ee9a935c96a465c400744c572e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kvovetkc "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1848
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kvovetkc
  2⤵
  - Launches sc.exe
  PID:552
- 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:2776
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2924 -s 1036
  2⤵
  - Program crash
  PID:3256

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2924 -ip 2924
1⤵
PID:4496

C:\Windows\SysWOW64\kvovetkc\eojevvou.exe
C:\Windows\SysWOW64\kvovetkc\eojevvou.exe /d"C:\Users\Admin\AppData\Local\Temp\1986f6ee9a935c96a465c400744c572e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4464
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1992 -s 516
  2⤵
  - Program crash
  PID:4556

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1992 -ip 1992
1⤵
PID:1204

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\eojevvou.exe

Filesize
12.7MB

MD5
c89c5ced47be07a6d1a10d2bb86ff2bf

SHA1
99522edeae0cbd0cd5e4f678deab71aa51f4177d

SHA256
a6723cb83a9db823c599c1781c79bb64630f540b494f638d53436da43e7ff65c

SHA512
e9013527e8a2dc2e4ba881524f1bac760e330f2dcb8a7189de308ff663a29907a4ecb41fe8175b88b1ab15c5bd6c42722f421c21342212f39e9206ed6d20e5e7

Download Submit
memory/1992-21-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/1992-16-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/1992-15-0x0000000000CA0000-0x0000000000DA0000-memory.dmp

Filesize
1024KB

Download
memory/2924-5-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/2924-3-0x0000000000A90000-0x0000000000AA3000-memory.dmp

Filesize
76KB

Download
memory/2924-8-0x0000000000B60000-0x0000000000C60000-memory.dmp

Filesize
1024KB

Download
memory/2924-9-0x0000000000A90000-0x0000000000AA3000-memory.dmp

Filesize
76KB

Download
memory/2924-1-0x0000000000B60000-0x0000000000C60000-memory.dmp

Filesize
1024KB

Download
memory/2924-13-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/2924-4-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/2924-7-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/2924-2-0x0000000000400000-0x00000000008E9000-memory.dmp

Filesize
4.9MB

Download
memory/4464-20-0x0000000000C60000-0x0000000000C75000-memory.dmp

Filesize
84KB

Download
memory/4464-17-0x0000000000C60000-0x0000000000C75000-memory.dmp

Filesize
84KB

Download
memory/4464-22-0x0000000000C60000-0x0000000000C75000-memory.dmp

Filesize
84KB

Download
memory/4464-23-0x0000000000C60000-0x0000000000C75000-memory.dmp

Filesize
84KB

Download
memory/4464-24-0x0000000000C60000-0x0000000000C75000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads