tofsee | 961f5faa6835275d729394a3136e2a932540297fa9ccf7ced9f0bec24b191f39

General

Target

cc35570f8a6ca5eaa3b157d5129cf642.exe
Size

12.0MB
MD5

cc35570f8a6ca5eaa3b157d5129cf642
SHA1

183c1a4dd86f9e96aba6020770de442ba1cab90f
SHA256

961f5faa6835275d729394a3136e2a932540297fa9ccf7ced9f0bec24b191f39
SHA512

638b4c36533d05b96b19f046899fcdc471efc58cd0893def3daa3d83d5c219fb8de67fd436cba3e22586b70a70e35ef7241cb042175c6f9555be52f2112bce58
SSDEEP

24576:9lxdvCcpOKCtBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBD:9lzOR

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
3488	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\miqbagjk\ImagePath = "C:\\Windows\\SysWOW64\\miqbagjk\\ziuakfbr.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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	cc35570f8a6ca5eaa3b157d5129cf642.exe

Deletes itself 1 IoCs

pid	Process
2600	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4028	ziuakfbr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4028 set thread context of 2600	4028	ziuakfbr.exe	111

Launches sc.exe 3 IoCs

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

pid	Process
1412	sc.exe
3952	sc.exe
1300	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
2956	4016	WerFault.exe	86
1108	4028	WerFault.exe	104

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4016 wrote to memory of 4872	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	90
PID 4016 wrote to memory of 4872	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	90
PID 4016 wrote to memory of 4872	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	90
PID 4016 wrote to memory of 4680	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	92
PID 4016 wrote to memory of 4680	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	92
PID 4016 wrote to memory of 4680	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	92
PID 4016 wrote to memory of 1412	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	94
PID 4016 wrote to memory of 1412	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	94
PID 4016 wrote to memory of 1412	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	94
PID 4016 wrote to memory of 3952	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	97
PID 4016 wrote to memory of 3952	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	97
PID 4016 wrote to memory of 3952	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	97
PID 4016 wrote to memory of 1300	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	101
PID 4016 wrote to memory of 1300	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	101
PID 4016 wrote to memory of 1300	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	101
PID 4016 wrote to memory of 3488	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	105
PID 4016 wrote to memory of 3488	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	105
PID 4016 wrote to memory of 3488	4016	cc35570f8a6ca5eaa3b157d5129cf642.exe	105
PID 4028 wrote to memory of 2600	4028	ziuakfbr.exe	111
PID 4028 wrote to memory of 2600	4028	ziuakfbr.exe	111
PID 4028 wrote to memory of 2600	4028	ziuakfbr.exe	111
PID 4028 wrote to memory of 2600	4028	ziuakfbr.exe	111
PID 4028 wrote to memory of 2600	4028	ziuakfbr.exe	111

C:\Users\Admin\AppData\Local\Temp\cc35570f8a6ca5eaa3b157d5129cf642.exe
"C:\Users\Admin\AppData\Local\Temp\cc35570f8a6ca5eaa3b157d5129cf642.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\miqbagjk\
  2⤵
  PID:4872
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ziuakfbr.exe" C:\Windows\SysWOW64\miqbagjk\
  2⤵
  PID:4680
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create miqbagjk binPath= "C:\Windows\SysWOW64\miqbagjk\ziuakfbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\cc35570f8a6ca5eaa3b157d5129cf642.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1412
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description miqbagjk "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3952
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start miqbagjk
  2⤵
  - Launches sc.exe
  PID:1300
- 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:3488
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4016 -s 1188
  2⤵
  - Program crash
  PID:2956

C:\Windows\SysWOW64\miqbagjk\ziuakfbr.exe
C:\Windows\SysWOW64\miqbagjk\ziuakfbr.exe /d"C:\Users\Admin\AppData\Local\Temp\cc35570f8a6ca5eaa3b157d5129cf642.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4028
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2600
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 512
  2⤵
  - Program crash
  PID:1108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4016 -ip 4016
1⤵
PID:1564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 4028 -ip 4028
1⤵
PID:3716

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\ziuakfbr.exe

Filesize
7.4MB

MD5
74f6a35ae49aae3ac603e431550d7c84

SHA1
2cb6eaabb53bb9465f8261e7c8d7ea1e03cd05c1

SHA256
a161721d11836e61801fbffbc1ae4db6b9051648812a0bc5f12dc36b954c8e5e

SHA512
8cb7141eddda2507f376e7581c1fbe5557edd42b56cda13faf6254022a47e819e8569b74fed1552d699394b8d05c6a8ed54b0b81a59284e843c4eb5c6a64ecec

Download Submit
C:\Windows\SysWOW64\miqbagjk\ziuakfbr.exe

Filesize
4.9MB

MD5
021f4a316f3e61ed574adc60bcf56439

SHA1
4fc2ed29254dbe708bd61a54afbc66d2380446c9

SHA256
97d8202db5259656c2ef315a68c1ef3688050767f387c010b42df42c5b8e5d4a

SHA512
bfaf50dc4fe60d01d216dd0e5fab8524c74ff4accaaf93c4ee2b6f8c46003e4e4b747bcfbe6a5efeac783756720a94bfe6a3812f6e0e067b2c7e388c8afd096f

Download Submit
memory/2600-12-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/2600-15-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/2600-16-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/2600-18-0x0000000000C00000-0x0000000000C15000-memory.dmp

Filesize
84KB

Download
memory/4016-3-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/4016-2-0x00000000021C0000-0x00000000021D3000-memory.dmp

Filesize
76KB

Download
memory/4016-8-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/4016-9-0x00000000021C0000-0x00000000021D3000-memory.dmp

Filesize
76KB

Download
memory/4016-1-0x00000000006E0000-0x00000000007E0000-memory.dmp

Filesize
1024KB

Download
memory/4028-10-0x0000000000790000-0x0000000000890000-memory.dmp

Filesize
1024KB

Download
memory/4028-11-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/4028-17-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads