tofsee | a492284b3b05e75509bd1b8b6e7f73b5bf7f78263d5725082a8c76bb782b3c63

General

Target

a1cdfab5a4af43636fe8141ba9bb2215.exe
Size

14.8MB
MD5

a1cdfab5a4af43636fe8141ba9bb2215
SHA1

fe8e0d854dee3d741167f4c302b5f05c71e23189
SHA256

a492284b3b05e75509bd1b8b6e7f73b5bf7f78263d5725082a8c76bb782b3c63
SHA512

9dca7bbfbcc6178eecc0221afae418b5012d27b4023e754d0db54811d57074b21583f400408fe06790869585eee163ece122dfd064050287ce7d3561c151e37f
SSDEEP

12288:F1vfanyphPu2xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFz:zvfEyph

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
3052	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\zlwpfhru\ImagePath = "C:\\Windows\\SysWOW64\\zlwpfhru\\xgafxwrn.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-1-5-21-3538781373-1545967067-4263767959-1000\Control Panel\International\Geo\Nation	a1cdfab5a4af43636fe8141ba9bb2215.exe

Deletes itself 1 IoCs

pid	Process
5000	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3184	xgafxwrn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3184 set thread context of 5000	3184	xgafxwrn.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
4860	sc.exe
4548	sc.exe
4964	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
2404	688	WerFault.exe	88
4492	3184	WerFault.exe	107

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 688 wrote to memory of 2348	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	93
PID 688 wrote to memory of 2348	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	93
PID 688 wrote to memory of 2348	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	93
PID 688 wrote to memory of 2060	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	95
PID 688 wrote to memory of 2060	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	95
PID 688 wrote to memory of 2060	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	95
PID 688 wrote to memory of 4860	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	97
PID 688 wrote to memory of 4860	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	97
PID 688 wrote to memory of 4860	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	97
PID 688 wrote to memory of 4548	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	99
PID 688 wrote to memory of 4548	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	99
PID 688 wrote to memory of 4548	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	99
PID 688 wrote to memory of 4964	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	101
PID 688 wrote to memory of 4964	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	101
PID 688 wrote to memory of 4964	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	101
PID 688 wrote to memory of 3052	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	103
PID 688 wrote to memory of 3052	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	103
PID 688 wrote to memory of 3052	688	a1cdfab5a4af43636fe8141ba9bb2215.exe	103
PID 3184 wrote to memory of 5000	3184	xgafxwrn.exe	108
PID 3184 wrote to memory of 5000	3184	xgafxwrn.exe	108
PID 3184 wrote to memory of 5000	3184	xgafxwrn.exe	108
PID 3184 wrote to memory of 5000	3184	xgafxwrn.exe	108
PID 3184 wrote to memory of 5000	3184	xgafxwrn.exe	108

C:\Users\Admin\AppData\Local\Temp\a1cdfab5a4af43636fe8141ba9bb2215.exe
"C:\Users\Admin\AppData\Local\Temp\a1cdfab5a4af43636fe8141ba9bb2215.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:688
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zlwpfhru\
  2⤵
  PID:2348
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xgafxwrn.exe" C:\Windows\SysWOW64\zlwpfhru\
  2⤵
  PID:2060
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zlwpfhru binPath= "C:\Windows\SysWOW64\zlwpfhru\xgafxwrn.exe /d\"C:\Users\Admin\AppData\Local\Temp\a1cdfab5a4af43636fe8141ba9bb2215.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4860
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zlwpfhru "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4548
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zlwpfhru
  2⤵
  - Launches sc.exe
  PID:4964
- 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:3052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 688 -s 1036
  2⤵
  - Program crash
  PID:2404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 688 -ip 688
1⤵
PID:1872

C:\Windows\SysWOW64\zlwpfhru\xgafxwrn.exe
C:\Windows\SysWOW64\zlwpfhru\xgafxwrn.exe /d"C:\Users\Admin\AppData\Local\Temp\a1cdfab5a4af43636fe8141ba9bb2215.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3184
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:5000
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3184 -s 516
  2⤵
  - Program crash
  PID:4492

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3184 -ip 3184
1⤵
PID:2452

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\xgafxwrn.exe

Filesize
13.0MB

MD5
b6360eacb54417b4f1a31c929b72e7a6

SHA1
b328a6d3335f78381943f34ea5fd9026045c4542

SHA256
9b447a43b31755e2af5ff2369fb018ca782ebcfcb5132db662b781dde15e13bf

SHA512
9fd601e089d4d9ead081d26dbafb424bfde41c3f94886b29fffa7a0c4b72e00a8fdc12850255af232fcc115a177bc24980bd67ae3cbdc06bb69a68e8de4702cf

Download Submit
C:\Windows\SysWOW64\zlwpfhru\xgafxwrn.exe

Filesize
8.2MB

MD5
6411987b6006bcbb10426d9646457a84

SHA1
3cfd44882ed2321aa4928a77e65a3683832b1e25

SHA256
69cb3af247f724c8bf2e924fb817625eaf3e15d7f884a825d3b7b8216f94fdf1

SHA512
a8283b903b25f71a70df67e1e0e3aac9defd4db890910239559f2a120ae202893c9efee6bb6d0933fec34c0ed524194dffb0c710fdfa2379ec8567622d3bbda7

Download Submit
memory/688-1-0x0000000003460000-0x0000000003560000-memory.dmp

Filesize
1024KB

Download
memory/688-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/688-4-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download
memory/688-5-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download
memory/688-7-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download
memory/688-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3184-11-0x0000000003760000-0x0000000003860000-memory.dmp

Filesize
1024KB

Download
memory/3184-20-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download
memory/3184-26-0x0000000000400000-0x0000000003379000-memory.dmp

Filesize
47.5MB

Download
memory/5000-21-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/5000-24-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/5000-25-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/5000-27-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/5000-28-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads