tofsee | 89fe92a8a1608b4288b77b39d34ae6e79aa1244040b5d2a5c5857edebabe6401

General

Target

bb9f7ff7ede3ef9d02513c000e39b108.exe
Size

14.7MB
MD5

bb9f7ff7ede3ef9d02513c000e39b108
SHA1

00f3907716b3fd5fb2eb9bfa99d00119e1e1c660
SHA256

89fe92a8a1608b4288b77b39d34ae6e79aa1244040b5d2a5c5857edebabe6401
SHA512

88b9ac25ea80f497f9410f7afb1b420733a2ebd849d7d69c4954fec873ad125318bf607a40f090ca5ad54def601cd49c888fe96f644d67dbb6a3dc1a6f7f671d
SSDEEP

6144:v0+ogoEtmYSAekxvC0J6xPFNAgbx/ektPses9zWTPGtYtYtYtYtYtYtYtYtYtYtz:hogo0Pekxvs1F2S/TtmpWr

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
1972	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\gqqfmqfx\ImagePath = "C:\\Windows\\SysWOW64\\gqqfmqfx\\vizianpj.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	bb9f7ff7ede3ef9d02513c000e39b108.exe

Deletes itself 1 IoCs

pid	Process
4388	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3140	vizianpj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3140 set thread context of 4388	3140	vizianpj.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
3984	sc.exe
2324	sc.exe
1900	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 3656 wrote to memory of 692	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	91
PID 3656 wrote to memory of 692	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	91
PID 3656 wrote to memory of 692	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	91
PID 3656 wrote to memory of 4776	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	93
PID 3656 wrote to memory of 4776	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	93
PID 3656 wrote to memory of 4776	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	93
PID 3656 wrote to memory of 3984	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	95
PID 3656 wrote to memory of 3984	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	95
PID 3656 wrote to memory of 3984	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	95
PID 3656 wrote to memory of 2324	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	97
PID 3656 wrote to memory of 2324	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	97
PID 3656 wrote to memory of 2324	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	97
PID 3656 wrote to memory of 1900	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	99
PID 3656 wrote to memory of 1900	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	99
PID 3656 wrote to memory of 1900	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	99
PID 3656 wrote to memory of 1972	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	102
PID 3656 wrote to memory of 1972	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	102
PID 3656 wrote to memory of 1972	3656	bb9f7ff7ede3ef9d02513c000e39b108.exe	102
PID 3140 wrote to memory of 4388	3140	vizianpj.exe	105
PID 3140 wrote to memory of 4388	3140	vizianpj.exe	105
PID 3140 wrote to memory of 4388	3140	vizianpj.exe	105
PID 3140 wrote to memory of 4388	3140	vizianpj.exe	105
PID 3140 wrote to memory of 4388	3140	vizianpj.exe	105

C:\Users\Admin\AppData\Local\Temp\bb9f7ff7ede3ef9d02513c000e39b108.exe
"C:\Users\Admin\AppData\Local\Temp\bb9f7ff7ede3ef9d02513c000e39b108.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3656
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gqqfmqfx\
  2⤵
  PID:692
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vizianpj.exe" C:\Windows\SysWOW64\gqqfmqfx\
  2⤵
  PID:4776
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create gqqfmqfx binPath= "C:\Windows\SysWOW64\gqqfmqfx\vizianpj.exe /d\"C:\Users\Admin\AppData\Local\Temp\bb9f7ff7ede3ef9d02513c000e39b108.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3984
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description gqqfmqfx "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2324
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start gqqfmqfx
  2⤵
  - Launches sc.exe
  PID:1900
- 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:1972

C:\Windows\SysWOW64\gqqfmqfx\vizianpj.exe
C:\Windows\SysWOW64\gqqfmqfx\vizianpj.exe /d"C:\Users\Admin\AppData\Local\Temp\bb9f7ff7ede3ef9d02513c000e39b108.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3140
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4388

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\vizianpj.exe

Filesize
2.2MB

MD5
54afdd53bde3940b10b6e5b2ddbb3b36

SHA1
728ef49582930a9f16396f0280777b2dac4ff982

SHA256
9671c5bda86b83bda8e0902643fd468be028d886fdc50e87f4fc60da54ec7716

SHA512
ca9ea50232f8d927f82f1542361e392f62d1a507787851ac92fa6de89bbb57bd26a104809dbe560f11663c20ee6ff74445ea976384703667d7b38071f55ac1b0

Download Submit
C:\Windows\SysWOW64\gqqfmqfx\vizianpj.exe

Filesize
2.4MB

MD5
158deba8695d98cb93658ee79571c9cd

SHA1
d5394c7147cac7bd6636cd2d187c5550daf60f62

SHA256
87cce3170b867083f19b897bc9739e9051761b021c6ac552ad5e077a3ea0020d

SHA512
8069e3ba486c4bb9347ff2d6717272d339a0abfe5efc033f04c9586b73b0f67a2c76dfb163db648feba2cbc174c219508edcfc8b549c2cadb4cc8c08010a12a1

Download Submit
memory/3140-10-0x00000000034E0000-0x00000000035E0000-memory.dmp

Filesize
1024KB

Download
memory/3140-15-0x0000000000400000-0x000000000324F000-memory.dmp

Filesize
46.3MB

Download
memory/3140-16-0x0000000000400000-0x000000000324F000-memory.dmp

Filesize
46.3MB

Download
memory/3656-9-0x00000000034B0000-0x00000000034C3000-memory.dmp

Filesize
76KB

Download
memory/3656-1-0x0000000003570000-0x0000000003670000-memory.dmp

Filesize
1024KB

Download
memory/3656-8-0x0000000000400000-0x000000000324F000-memory.dmp

Filesize
46.3MB

Download
memory/3656-4-0x0000000000400000-0x000000000324F000-memory.dmp

Filesize
46.3MB

Download
memory/3656-2-0x00000000034B0000-0x00000000034C3000-memory.dmp

Filesize
76KB

Download
memory/4388-11-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/4388-14-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/4388-17-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/4388-18-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/4388-19-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads