tofsee | 7d34075aebc551801edcf950ad816a5f277522f2d6b53679e7bd2921d89e0c4f

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 08:50

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General

Target
dec340af99d11d4bda18bafe03b2172f.exe
Size 14.9MB
Sample240326-krqcyaee75
SHA256 7d34075aebc551801edcf950ad816a5f277522f2d6b53679e7bd2921d89e0c4f
MD5 dec340af99d11d4bda18bafe03b2172f
SHA1 08712f078b5470ee9a7398c8662af4269b749da3
SHA512 4125d79a9a9f1288e8fdaf5477c47f0c6ef8c522ae639842b334847a7ed1668126ee0ff8eae59dac20808e6b64959027bb6bb811d10f2cfb43c551374bf07a1d
SSDEEP 49152:2yqI2kmso555555555555555555555555555555555555555555555555555555t:2yqI2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

43.231.4.7
lazystax.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
3184	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\sliiqbqf\ImagePath = "C:\\Windows\\SysWOW64\\sliiqbqf\\gidjcpz.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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	dec340af99d11d4bda18bafe03b2172f.exe

Deletes itself 1 IoCs

pid	Process
3004	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
404	gidjcpz.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ŒwY	gidjcpz.exe
File created	C:\Windows\SysWOW64\´?X	gidjcpz.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 404 set thread context of 3004	404	gidjcpz.exe	107

Launches sc.exe 3 IoCs

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

pid	Process
4460	sc.exe
1040	sc.exe
2808	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
1772	3424	WerFault.exe	87
2112	404	WerFault.exe	105

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3424 wrote to memory of 1260	3424	dec340af99d11d4bda18bafe03b2172f.exe	91
PID 3424 wrote to memory of 1260	3424	dec340af99d11d4bda18bafe03b2172f.exe	91
PID 3424 wrote to memory of 1260	3424	dec340af99d11d4bda18bafe03b2172f.exe	91
PID 3424 wrote to memory of 2212	3424	dec340af99d11d4bda18bafe03b2172f.exe	93
PID 3424 wrote to memory of 2212	3424	dec340af99d11d4bda18bafe03b2172f.exe	93
PID 3424 wrote to memory of 2212	3424	dec340af99d11d4bda18bafe03b2172f.exe	93
PID 3424 wrote to memory of 4460	3424	dec340af99d11d4bda18bafe03b2172f.exe	95
PID 3424 wrote to memory of 4460	3424	dec340af99d11d4bda18bafe03b2172f.exe	95
PID 3424 wrote to memory of 4460	3424	dec340af99d11d4bda18bafe03b2172f.exe	95
PID 3424 wrote to memory of 1040	3424	dec340af99d11d4bda18bafe03b2172f.exe	97
PID 3424 wrote to memory of 1040	3424	dec340af99d11d4bda18bafe03b2172f.exe	97
PID 3424 wrote to memory of 1040	3424	dec340af99d11d4bda18bafe03b2172f.exe	97
PID 3424 wrote to memory of 2808	3424	dec340af99d11d4bda18bafe03b2172f.exe	99
PID 3424 wrote to memory of 2808	3424	dec340af99d11d4bda18bafe03b2172f.exe	99
PID 3424 wrote to memory of 2808	3424	dec340af99d11d4bda18bafe03b2172f.exe	99
PID 3424 wrote to memory of 3184	3424	dec340af99d11d4bda18bafe03b2172f.exe	101
PID 3424 wrote to memory of 3184	3424	dec340af99d11d4bda18bafe03b2172f.exe	101
PID 3424 wrote to memory of 3184	3424	dec340af99d11d4bda18bafe03b2172f.exe	101
PID 404 wrote to memory of 3004	404	gidjcpz.exe	107
PID 404 wrote to memory of 3004	404	gidjcpz.exe	107
PID 404 wrote to memory of 3004	404	gidjcpz.exe	107
PID 404 wrote to memory of 3004	404	gidjcpz.exe	107
PID 404 wrote to memory of 3004	404	gidjcpz.exe	107

C:\Users\Admin\AppData\Local\Temp\dec340af99d11d4bda18bafe03b2172f.exe
"C:\Users\Admin\AppData\Local\Temp\dec340af99d11d4bda18bafe03b2172f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3424
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sliiqbqf\
  2⤵
  PID:1260
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gidjcpz.exe" C:\Windows\SysWOW64\sliiqbqf\
  2⤵
  PID:2212
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create sliiqbqf binPath= "C:\Windows\SysWOW64\sliiqbqf\gidjcpz.exe /d\"C:\Users\Admin\AppData\Local\Temp\dec340af99d11d4bda18bafe03b2172f.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4460
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description sliiqbqf "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start sliiqbqf
  2⤵
  - Launches sc.exe
  PID:2808
- 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:3184
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3424 -s 1028
  2⤵
  - Program crash
  PID:1772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3424 -ip 3424
1⤵
PID:1132

C:\Windows\SysWOW64\sliiqbqf\gidjcpz.exe
C:\Windows\SysWOW64\sliiqbqf\gidjcpz.exe /d"C:\Users\Admin\AppData\Local\Temp\dec340af99d11d4bda18bafe03b2172f.exe"
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:404
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3004
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 404 -s 548
  2⤵
  - Program crash
  PID:2112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 404 -ip 404
1⤵
PID:3440

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

gidjcpz.exe

Path C:\Users\Admin\AppData\Local\Temp\gidjcpz.exe
Size 12.8MB
SHA256 69b75925d4341bdae1482039d30c43a1be1631c207d000e19930b45f4dc83ba7
MD5 22f23142479b4e750945ff4abd484247
SHA1 9c68c0d91479c78fb64b76d00f78bea9e7781d24
SHA512 05603cc0cd211c96e2773b93d6a381c33f19eb7ac3adb6b12111a930312875b111f7b5458fcdf64767d3c937f70b376144e3cb1acafbb33e24bf482a8f76d438
SSDEEP 49152:nyqI2kmso555555555555555555555555555555555555555555555555555555T:nyqI2
MD5 SHA1 SHA512 SSDEEP

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gidjcpz.exe

Path C:\Windows\SysWOW64\sliiqbqf\gidjcpz.exe
Size 6.3MB
SHA256 bcca1faee7403e0934bdb8dde9465755f1324d11fc03316da0a8198ff9174685
MD5 7fa11de4bcbc3ed6c566df1725ffa250
SHA1 7714a1781036d7a0d110d81116282b57d2e937cc
SHA512 16052bd3fe3dd83a055d594e2ea6ec6aff059b6197c336a2b6cd8bb0ba2fdcb7aa5d736bcba0c3d5472f1f1d5cc741ba22cdc55c84e70f98cea48b5145861dfa
SSDEEP 49152:nyqI2kmso555555555555555555555555555555555555555555555555555555o:nyqI2Q
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/404-10-0x0000000000570000-0x0000000000670000-memory.dmp

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memory/404-17-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/404-11-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/3004-12-0x00000000010C0000-0x00000000010D5000-memory.dmp

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memory/3004-16-0x00000000010C0000-0x00000000010D5000-memory.dmp

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memory/3004-18-0x00000000010C0000-0x00000000010D5000-memory.dmp

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memory/3004-19-0x00000000010C0000-0x00000000010D5000-memory.dmp

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memory/3424-8-0x00000000021B0000-0x00000000021C3000-memory.dmp

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memory/3424-7-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/3424-3-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/3424-1-0x00000000006B0000-0x00000000007B0000-memory.dmp

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memory/3424-2-0x00000000021B0000-0x00000000021C3000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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