tofsee | dca28026972104cfee2366df490b5a82637b0821f4245f0f333ebbd25c6e04bb

General

Target

e2352e8e0a3f774f51b903571b63ca03.exe
Size

12.6MB
MD5

e2352e8e0a3f774f51b903571b63ca03
SHA1

aa70b74cda6fbd0eb60b84c439d079252485cf50
SHA256

dca28026972104cfee2366df490b5a82637b0821f4245f0f333ebbd25c6e04bb
SHA512

ee9a220a8e80bbeb303cf7068da24e7615d92f13891b9d46164995f50eab1691d445f8cfacfd6b4bf3cc401d05e20c6ed06781fb56ba3903c4b9c4ef5f1a060f
SSDEEP

12288:CS5xuP/rZh5sMqGHo7ywSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSH:WP/rZd87

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
4388	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\ppnjthqh\ImagePath = "C:\\Windows\\SysWOW64\\ppnjthqh\\cxhkyjjr.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	e2352e8e0a3f774f51b903571b63ca03.exe

Deletes itself 1 IoCs

pid	Process
440	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2172	cxhkyjjr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2172 set thread context of 440	2172	cxhkyjjr.exe	116

Launches sc.exe 3 IoCs

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

pid	Process
1204	sc.exe
4984	sc.exe
4980	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
1516	1416	WerFault.exe	91
416	2172	WerFault.exe	112

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 4008	1416	e2352e8e0a3f774f51b903571b63ca03.exe	97
PID 1416 wrote to memory of 4008	1416	e2352e8e0a3f774f51b903571b63ca03.exe	97
PID 1416 wrote to memory of 4008	1416	e2352e8e0a3f774f51b903571b63ca03.exe	97
PID 1416 wrote to memory of 2592	1416	e2352e8e0a3f774f51b903571b63ca03.exe	100
PID 1416 wrote to memory of 2592	1416	e2352e8e0a3f774f51b903571b63ca03.exe	100
PID 1416 wrote to memory of 2592	1416	e2352e8e0a3f774f51b903571b63ca03.exe	100
PID 1416 wrote to memory of 1204	1416	e2352e8e0a3f774f51b903571b63ca03.exe	103
PID 1416 wrote to memory of 1204	1416	e2352e8e0a3f774f51b903571b63ca03.exe	103
PID 1416 wrote to memory of 1204	1416	e2352e8e0a3f774f51b903571b63ca03.exe	103
PID 1416 wrote to memory of 4984	1416	e2352e8e0a3f774f51b903571b63ca03.exe	105
PID 1416 wrote to memory of 4984	1416	e2352e8e0a3f774f51b903571b63ca03.exe	105
PID 1416 wrote to memory of 4984	1416	e2352e8e0a3f774f51b903571b63ca03.exe	105
PID 1416 wrote to memory of 4980	1416	e2352e8e0a3f774f51b903571b63ca03.exe	107
PID 1416 wrote to memory of 4980	1416	e2352e8e0a3f774f51b903571b63ca03.exe	107
PID 1416 wrote to memory of 4980	1416	e2352e8e0a3f774f51b903571b63ca03.exe	107
PID 1416 wrote to memory of 4388	1416	e2352e8e0a3f774f51b903571b63ca03.exe	109
PID 1416 wrote to memory of 4388	1416	e2352e8e0a3f774f51b903571b63ca03.exe	109
PID 1416 wrote to memory of 4388	1416	e2352e8e0a3f774f51b903571b63ca03.exe	109
PID 2172 wrote to memory of 440	2172	cxhkyjjr.exe	116
PID 2172 wrote to memory of 440	2172	cxhkyjjr.exe	116
PID 2172 wrote to memory of 440	2172	cxhkyjjr.exe	116
PID 2172 wrote to memory of 440	2172	cxhkyjjr.exe	116
PID 2172 wrote to memory of 440	2172	cxhkyjjr.exe	116

C:\Users\Admin\AppData\Local\Temp\e2352e8e0a3f774f51b903571b63ca03.exe
"C:\Users\Admin\AppData\Local\Temp\e2352e8e0a3f774f51b903571b63ca03.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1416
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ppnjthqh\
  2⤵
  PID:4008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cxhkyjjr.exe" C:\Windows\SysWOW64\ppnjthqh\
  2⤵
  PID:2592
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ppnjthqh binPath= "C:\Windows\SysWOW64\ppnjthqh\cxhkyjjr.exe /d\"C:\Users\Admin\AppData\Local\Temp\e2352e8e0a3f774f51b903571b63ca03.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1204
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ppnjthqh "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4984
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ppnjthqh
  2⤵
  - Launches sc.exe
  PID:4980
- 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:4388
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1416 -s 1032
  2⤵
  - Program crash
  PID:1516

C:\Windows\SysWOW64\ppnjthqh\cxhkyjjr.exe
C:\Windows\SysWOW64\ppnjthqh\cxhkyjjr.exe /d"C:\Users\Admin\AppData\Local\Temp\e2352e8e0a3f774f51b903571b63ca03.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:440
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2172 -s 516
  2⤵
  - Program crash
  PID:416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1416 -ip 1416
1⤵
PID:4460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 2172 -ip 2172
1⤵
PID:4492

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4104 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:3984

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
14.1MB

MD5
bfa1e27ee8753c71d466e89cbc26e861

SHA1
21215cfa9bd255c8531788673f88b7c725465152

SHA256
2970acdf69165fdb937fc3b222e8c5c969af12d6bdab490c14e9611ed66dca61

SHA512
7e41d66f24cb93fbd5db59271c11b3b4835134ce6d385401241039fcdbd6789db41a8a0e7de8f33737d5fcf4b7e21bd85b2065249d9628f893fb03c52b334d83

Download Submit
memory/440-13-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

Filesize
84KB

Download
memory/440-19-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

Filesize
84KB

Download
memory/440-18-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

Filesize
84KB

Download
memory/440-16-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

Filesize
84KB

Download
memory/1416-5-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1416-10-0x00000000021C0000-0x00000000021D3000-memory.dmp

Filesize
76KB

Download
memory/1416-9-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1416-1-0x0000000000620000-0x0000000000720000-memory.dmp

Filesize
1024KB

Download
memory/1416-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1416-2-0x00000000021C0000-0x00000000021D3000-memory.dmp

Filesize
76KB

Download
memory/2172-11-0x0000000000510000-0x0000000000610000-memory.dmp

Filesize
1024KB

Download
memory/2172-12-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2172-17-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads