tofsee | dc9b51704541b43494bab704763d5f593a560cd758fd8d1aba1817a9a4ebd6b5

General

Target

bc9734c2cc8f0ce729606a1094139e5e.exe
Size

11.7MB
MD5

bc9734c2cc8f0ce729606a1094139e5e
SHA1

9ba350559fdc66ad89cfaa88374dddcefd49ea37
SHA256

dc9b51704541b43494bab704763d5f593a560cd758fd8d1aba1817a9a4ebd6b5
SHA512

ed704ce7597efd3cb4e1ebb7acb3dacbc53f4f0819cf800ead36a07c7044d01115994303b467330ccd7c9a07bd40f46279ccb05abc528508bb41a86187885040
SSDEEP

24576:ajCj10HSqGgeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeO:a/D

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
3868	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\qoyymeeg\ImagePath = "C:\\Windows\\SysWOW64\\qoyymeeg\\gyhpmzlf.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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	bc9734c2cc8f0ce729606a1094139e5e.exe

Executes dropped EXE 1 IoCs

pid	Process
3696	gyhpmzlf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3696 set thread context of 5008	3696	gyhpmzlf.exe	103

Launches sc.exe 3 IoCs

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

pid	Process
2948	sc.exe
3284	sc.exe
5012	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 4428 wrote to memory of 4952	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	90
PID 4428 wrote to memory of 4952	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	90
PID 4428 wrote to memory of 4952	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	90
PID 4428 wrote to memory of 760	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	92
PID 4428 wrote to memory of 760	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	92
PID 4428 wrote to memory of 760	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	92
PID 4428 wrote to memory of 3284	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	94
PID 4428 wrote to memory of 3284	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	94
PID 4428 wrote to memory of 3284	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	94
PID 4428 wrote to memory of 5012	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	96
PID 4428 wrote to memory of 5012	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	96
PID 4428 wrote to memory of 5012	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	96
PID 4428 wrote to memory of 2948	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	98
PID 4428 wrote to memory of 2948	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	98
PID 4428 wrote to memory of 2948	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	98
PID 4428 wrote to memory of 3868	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	101
PID 4428 wrote to memory of 3868	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	101
PID 4428 wrote to memory of 3868	4428	bc9734c2cc8f0ce729606a1094139e5e.exe	101
PID 3696 wrote to memory of 5008	3696	gyhpmzlf.exe	103
PID 3696 wrote to memory of 5008	3696	gyhpmzlf.exe	103
PID 3696 wrote to memory of 5008	3696	gyhpmzlf.exe	103
PID 3696 wrote to memory of 5008	3696	gyhpmzlf.exe	103
PID 3696 wrote to memory of 5008	3696	gyhpmzlf.exe	103

C:\Users\Admin\AppData\Local\Temp\bc9734c2cc8f0ce729606a1094139e5e.exe
"C:\Users\Admin\AppData\Local\Temp\bc9734c2cc8f0ce729606a1094139e5e.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4428
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qoyymeeg\
  2⤵
  PID:4952
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gyhpmzlf.exe" C:\Windows\SysWOW64\qoyymeeg\
  2⤵
  PID:760
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qoyymeeg binPath= "C:\Windows\SysWOW64\qoyymeeg\gyhpmzlf.exe /d\"C:\Users\Admin\AppData\Local\Temp\bc9734c2cc8f0ce729606a1094139e5e.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3284
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qoyymeeg "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:5012
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qoyymeeg
  2⤵
  - Launches sc.exe
  PID:2948
- 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:3868

C:\Windows\SysWOW64\qoyymeeg\gyhpmzlf.exe
C:\Windows\SysWOW64\qoyymeeg\gyhpmzlf.exe /d"C:\Users\Admin\AppData\Local\Temp\bc9734c2cc8f0ce729606a1094139e5e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3696
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:5008

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\gyhpmzlf.exe

Filesize
10.4MB

MD5
cdebe7bc8c68be048a3a5d6ef7a52339

SHA1
675e708d32e61a7f7f40cbef8c764764161c92f2

SHA256
b7c32ad5a8f0d1a24c3adfb6273481e32b87eabac4d3d37c4406dcc96745e0a8

SHA512
95c372c754d79896dd1f7fac8ee2f49ad9b4d46f7949b234d7584692d3d7bcf163abfe008cc685c077990166ee3432516344c2a79758e74da35c5e1314f78e61

Download Submit
C:\Windows\SysWOW64\qoyymeeg\gyhpmzlf.exe

Filesize
4.8MB

MD5
e3b95f3a2d0e804217de3da28a1ffcfe

SHA1
8e973ac38903d4b434213d5a021ddaa5a07c4f85

SHA256
de65b3184b61013b49a83d494bb506f88dbad6c1bb9c2519f995f4c51a9ab17f

SHA512
e7cef782eb304a823866e3fbd30d9d0110c07a2272fe9defc1c03073b9b49c774433d488ef5381deacf7d5b2e98798599d38706aecc9a4303bcfd8d55e8b61c9

Download Submit
memory/3696-18-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/3696-9-0x0000000000D30000-0x0000000000D43000-memory.dmp

Filesize
76KB

Download
memory/3696-8-0x0000000000840000-0x0000000000940000-memory.dmp

Filesize
1024KB

Download
memory/3696-10-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4428-2-0x0000000000610000-0x0000000000623000-memory.dmp

Filesize
76KB

Download
memory/4428-3-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/4428-1-0x0000000000680000-0x0000000000780000-memory.dmp

Filesize
1024KB

Download
memory/4428-23-0x0000000000680000-0x0000000000780000-memory.dmp

Filesize
1024KB

Download
memory/4428-15-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/5008-11-0x00000000007D0000-0x00000000007E5000-memory.dmp

Filesize
84KB

Download
memory/5008-17-0x00000000007D0000-0x00000000007E5000-memory.dmp

Filesize
84KB

Download
memory/5008-16-0x00000000007D0000-0x00000000007E5000-memory.dmp

Filesize
84KB

Download
memory/5008-14-0x00000000007D0000-0x00000000007E5000-memory.dmp

Filesize
84KB

Download
memory/5008-25-0x00000000007D0000-0x00000000007E5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads