tofsee | d6478331f879c08cb4a0030a15f0cd885d76febbfd423ae5a890ac370efbf536

General

Target

f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe
Size

14.4MB
MD5

f532feaa674c93bdfc606c7aba94aaa4
SHA1

b586b0de0001ba9ffad715997b751220b612c9e2
SHA256

d6478331f879c08cb4a0030a15f0cd885d76febbfd423ae5a890ac370efbf536
SHA512

fa7745bc43f14ba8f6eccc7c42c468fe2ebae3c3e86b2f65a9065bb733ca253350a43d5f2dd6c93348989396ab47f928e886360a44ae1d0de0bed71740e77972
SSDEEP

24576:qjDuKnh7YzbKBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBH:qnh

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
1164	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\zkgievan\ImagePath = "C:\\Windows\\SysWOW64\\zkgievan\\sldzxiw.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-1-5-21-553605503-2331009851-2137262461-1000\Control Panel\International\Geo\Nation	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
2660	sldzxiw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2660 set thread context of 4516	2660	sldzxiw.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
3568	sc.exe
3472	sc.exe
3600	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4332 wrote to memory of 1760	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	90
PID 4332 wrote to memory of 1760	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	90
PID 4332 wrote to memory of 1760	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	90
PID 4332 wrote to memory of 5064	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	92
PID 4332 wrote to memory of 5064	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	92
PID 4332 wrote to memory of 5064	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	92
PID 4332 wrote to memory of 3600	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	94
PID 4332 wrote to memory of 3600	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	94
PID 4332 wrote to memory of 3600	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	94
PID 4332 wrote to memory of 3568	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	96
PID 4332 wrote to memory of 3568	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	96
PID 4332 wrote to memory of 3568	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	96
PID 4332 wrote to memory of 3472	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	98
PID 4332 wrote to memory of 3472	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	98
PID 4332 wrote to memory of 3472	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	98
PID 4332 wrote to memory of 1164	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	101
PID 4332 wrote to memory of 1164	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	101
PID 4332 wrote to memory of 1164	4332	f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe	101
PID 2660 wrote to memory of 4516	2660	sldzxiw.exe	103
PID 2660 wrote to memory of 4516	2660	sldzxiw.exe	103
PID 2660 wrote to memory of 4516	2660	sldzxiw.exe	103
PID 2660 wrote to memory of 4516	2660	sldzxiw.exe	103
PID 2660 wrote to memory of 4516	2660	sldzxiw.exe	103

C:\Users\Admin\AppData\Local\Temp\f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zkgievan\
  2⤵
  PID:1760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sldzxiw.exe" C:\Windows\SysWOW64\zkgievan\
  2⤵
  PID:5064
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zkgievan binPath= "C:\Windows\SysWOW64\zkgievan\sldzxiw.exe /d\"C:\Users\Admin\AppData\Local\Temp\f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3600
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zkgievan "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3568
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zkgievan
  2⤵
  - Launches sc.exe
  PID:3472
- 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:1164

C:\Windows\SysWOW64\zkgievan\sldzxiw.exe
C:\Windows\SysWOW64\zkgievan\sldzxiw.exe /d"C:\Users\Admin\AppData\Local\Temp\f532feaa674c93bdfc606c7aba94aaa4_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:4516

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\sldzxiw.exe

Filesize
11.8MB

MD5
a24bbc38d01260790f21941df7fd5e1d

SHA1
8ea35f3227aaa99f58a65aacab9a41ddbcb7b3ff

SHA256
b66c196c4258fa267cfdc45319b0f5886d833797fcddd18ee100be3b840f0acd

SHA512
fb5a1fa19b4796ff63c233b1b408b6d68b8f19b70a5c3987260d14239b9388d66908b57fad988a370b9f085683021a1d260ab01d086284671ca5ffc9ba0fc12e

Download Submit
memory/2660-9-0x0000000000D30000-0x0000000000D43000-memory.dmp

Filesize
76KB

Download
memory/2660-18-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2660-10-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2660-8-0x0000000000480000-0x0000000000580000-memory.dmp

Filesize
1024KB

Download
memory/4332-15-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4332-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4332-1-0x0000000000620000-0x0000000000720000-memory.dmp

Filesize
1024KB

Download
memory/4332-2-0x00000000005D0000-0x00000000005E3000-memory.dmp

Filesize
76KB

Download
memory/4332-23-0x0000000000620000-0x0000000000720000-memory.dmp

Filesize
1024KB

Download
memory/4516-11-0x0000000000CA0000-0x0000000000CB5000-memory.dmp

Filesize
84KB

Download
memory/4516-14-0x0000000000CA0000-0x0000000000CB5000-memory.dmp

Filesize
84KB

Download
memory/4516-16-0x0000000000CA0000-0x0000000000CB5000-memory.dmp

Filesize
84KB

Download
memory/4516-17-0x0000000000CA0000-0x0000000000CB5000-memory.dmp

Filesize
84KB

Download
memory/4516-26-0x0000000000CA0000-0x0000000000CB5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads