tofsee | cb69feca957e765d0dd33ba69c7e17266641ead5805fb04f6d84232b6b796bf9

General

Target

7e201f6d24fb8268d2e4ba7d0e2b3e67.exe
Size

11.7MB
MD5

7e201f6d24fb8268d2e4ba7d0e2b3e67
SHA1

e443a234b26eac5eb753af89b35898799801c717
SHA256

cb69feca957e765d0dd33ba69c7e17266641ead5805fb04f6d84232b6b796bf9
SHA512

e1d1e191cd7fe8a02c2df7c68763f6245a8126eae1814522eac220834cec4230a76af476cb3cba5e8f0c89c4bab97309a00fe6eb02e3f0f269bdf211d89e28ae
SSDEEP

3072:uBNmFjaoPAa5LqiM8h2pj3gKTf8dl4ghaF5+P9H:CwjaoB5LqiLh+j3gMfTCBl

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

176.111.174.19

defeatwax.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
4764	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\kadyeeiz\ImagePath = "C:\\Windows\\SysWOW64\\kadyeeiz\\gsebkir.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe

Deletes itself 1 IoCs

pid	Process
3476	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2312	gsebkir.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2312 set thread context of 3476	2312	gsebkir.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
1316	sc.exe
3096	sc.exe
1472	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
2056	1368	WerFault.exe	83
3604	2312	WerFault.exe	94

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 1224	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	84
PID 1368 wrote to memory of 1224	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	84
PID 1368 wrote to memory of 1224	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	84
PID 1368 wrote to memory of 4864	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	86
PID 1368 wrote to memory of 4864	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	86
PID 1368 wrote to memory of 4864	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	86
PID 1368 wrote to memory of 1316	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	88
PID 1368 wrote to memory of 1316	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	88
PID 1368 wrote to memory of 1316	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	88
PID 1368 wrote to memory of 3096	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	90
PID 1368 wrote to memory of 3096	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	90
PID 1368 wrote to memory of 3096	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	90
PID 1368 wrote to memory of 1472	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	92
PID 1368 wrote to memory of 1472	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	92
PID 1368 wrote to memory of 1472	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	92
PID 1368 wrote to memory of 4764	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	95
PID 1368 wrote to memory of 4764	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	95
PID 1368 wrote to memory of 4764	1368	7e201f6d24fb8268d2e4ba7d0e2b3e67.exe	95
PID 2312 wrote to memory of 3476	2312	gsebkir.exe	107
PID 2312 wrote to memory of 3476	2312	gsebkir.exe	107
PID 2312 wrote to memory of 3476	2312	gsebkir.exe	107
PID 2312 wrote to memory of 3476	2312	gsebkir.exe	107
PID 2312 wrote to memory of 3476	2312	gsebkir.exe	107

C:\Users\Admin\AppData\Local\Temp\7e201f6d24fb8268d2e4ba7d0e2b3e67.exe
"C:\Users\Admin\AppData\Local\Temp\7e201f6d24fb8268d2e4ba7d0e2b3e67.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kadyeeiz\
  2⤵
  PID:1224
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gsebkir.exe" C:\Windows\SysWOW64\kadyeeiz\
  2⤵
  PID:4864
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kadyeeiz binPath= "C:\Windows\SysWOW64\kadyeeiz\gsebkir.exe /d\"C:\Users\Admin\AppData\Local\Temp\7e201f6d24fb8268d2e4ba7d0e2b3e67.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1316
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kadyeeiz "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3096
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kadyeeiz
  2⤵
  - Launches sc.exe
  PID:1472
- 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:4764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1368 -s 572
  2⤵
  - Program crash
  PID:2056

C:\Windows\SysWOW64\kadyeeiz\gsebkir.exe
C:\Windows\SysWOW64\kadyeeiz\gsebkir.exe /d"C:\Users\Admin\AppData\Local\Temp\7e201f6d24fb8268d2e4ba7d0e2b3e67.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2312 -s 544
  2⤵
  - Program crash
  PID:3604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1368 -ip 1368
1⤵
PID:1112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2312 -ip 2312
1⤵
PID:4396

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\gsebkir.exe

Filesize
14.2MB

MD5
cac6acd7087665dd31db9fa8b774a421

SHA1
6e2d00928ce094cbac743be930e25c8a6db11f8a

SHA256
67d219947afae025cd873229abc0759815fd425ff76148b25f55aa3a32e6cfe7

SHA512
4ee826493a13020cede46c394c5c3f10e87337d533b5d82a513576cd52106a734b1eae2787142eec0a9cd3c4c14bfe3d5bb7f8648b58035797b45d85858d2c1c

Download Submit
memory/1368-10-0x0000000002EA0000-0x0000000002EB3000-memory.dmp

Filesize
76KB

Download
memory/1368-2-0x0000000002EA0000-0x0000000002EB3000-memory.dmp

Filesize
76KB

Download
memory/1368-6-0x0000000000400000-0x0000000002BF4000-memory.dmp

Filesize
40.0MB

Download
memory/1368-9-0x0000000000400000-0x0000000002BF4000-memory.dmp

Filesize
40.0MB

Download
memory/1368-1-0x0000000002EF0000-0x0000000002FF0000-memory.dmp

Filesize
1024KB

Download
memory/1368-4-0x0000000000400000-0x0000000002BF4000-memory.dmp

Filesize
40.0MB

Download
memory/2312-16-0x0000000000400000-0x0000000002BF4000-memory.dmp

Filesize
40.0MB

Download
memory/2312-11-0x0000000002E10000-0x0000000002F10000-memory.dmp

Filesize
1024KB

Download
memory/2312-19-0x0000000000400000-0x0000000002BF4000-memory.dmp

Filesize
40.0MB

Download
memory/3476-12-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Filesize
84KB

Download
memory/3476-18-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Filesize
84KB

Download
memory/3476-17-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Filesize
84KB

Download
memory/3476-15-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Filesize
84KB

Download
memory/3476-20-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads