tofsee | 4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04/04/2024, 23:35

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General

Target
c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe
Size 12.5MB
Sample240404-3ldfased65
SHA256 4fb9ec0883d7b509a16d73e2181f5236d13042706cb8bbe82091f8a9db4575d1
MD5 c4c9428ea6a30325f8ac6a3fecc199a1
SHA1 e8c27d01e8e1b4f11f6183e8ba4b3065392349ce
SHA512 b052061f5936ee2f30fc18e81daa9542451a1ad58235bd180e7d01fa49977813945492890a1a37a3cec59bb261a626cd175f12ac85bec9e000273159980e7a33
SSDEEP 196608:TPRMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMP:T
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

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
2480	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\dfzjnraq\ImagePath = "C:\\Windows\\SysWOW64\\dfzjnraq\\orpkelvf.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
1860	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4032	orpkelvf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4032 set thread context of 1860	4032	orpkelvf.exe	114

Launches sc.exe 3 IoCs

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

pid	Process
4232	sc.exe
4536	sc.exe
2608	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
3780	4532	WerFault.exe	93
4412	4032	WerFault.exe	110

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4532 wrote to memory of 1212	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	96
PID 4532 wrote to memory of 1212	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	96
PID 4532 wrote to memory of 1212	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	96
PID 4532 wrote to memory of 3500	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	98
PID 4532 wrote to memory of 3500	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	98
PID 4532 wrote to memory of 3500	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	98
PID 4532 wrote to memory of 4232	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	100
PID 4532 wrote to memory of 4232	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	100
PID 4532 wrote to memory of 4232	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	100
PID 4532 wrote to memory of 4536	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	102
PID 4532 wrote to memory of 4536	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	102
PID 4532 wrote to memory of 4536	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	102
PID 4532 wrote to memory of 2608	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	104
PID 4532 wrote to memory of 2608	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	104
PID 4532 wrote to memory of 2608	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	104
PID 4532 wrote to memory of 2480	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	106
PID 4532 wrote to memory of 2480	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	106
PID 4532 wrote to memory of 2480	4532	c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe	106
PID 4032 wrote to memory of 1860	4032	orpkelvf.exe	114
PID 4032 wrote to memory of 1860	4032	orpkelvf.exe	114
PID 4032 wrote to memory of 1860	4032	orpkelvf.exe	114
PID 4032 wrote to memory of 1860	4032	orpkelvf.exe	114
PID 4032 wrote to memory of 1860	4032	orpkelvf.exe	114

C:\Users\Admin\AppData\Local\Temp\c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4532
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dfzjnraq\
  2⤵
  PID:1212
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\orpkelvf.exe" C:\Windows\SysWOW64\dfzjnraq\
  2⤵
  PID:3500
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create dfzjnraq binPath= "C:\Windows\SysWOW64\dfzjnraq\orpkelvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4232
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description dfzjnraq "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start dfzjnraq
  2⤵
  - Launches sc.exe
  PID:2608
- 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:2480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4532 -s 1180
  2⤵
  - Program crash
  PID:3780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4532 -ip 4532
1⤵
PID:3660

C:\Windows\SysWOW64\dfzjnraq\orpkelvf.exe
C:\Windows\SysWOW64\dfzjnraq\orpkelvf.exe /d"C:\Users\Admin\AppData\Local\Temp\c4c9428ea6a30325f8ac6a3fecc199a1_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4032
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:1860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4032 -s 512
  2⤵
  - Program crash
  PID:4412

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4032 -ip 4032
1⤵
PID:3840

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3180 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8
1⤵
PID:2260

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

orpkelvf.exe

Path C:\Users\Admin\AppData\Local\Temp\orpkelvf.exe
Size 13.4MB
SHA256 5028c47055a0dab65e2b0781727413c4a9c3e100db3679f8fbc9848be682f65b
MD5 096d5f12f581214bff114003d1c735e7
SHA1 91923b6183770e5069c45fd43074c6036f22d3c0
SHA512 621784df467021139e10a06f0afb789d5431da149cf0d2ffabb97f83b7ba6496eaabcac2515b91f7cf0460316521c1e15a0b8e387ac99d63dd2018882c2afd7e
SSDEEP 196608:IPRMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMk:I
MD5 SHA1 SHA512 SSDEEP

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memory/1860-21-0x0000000000170000-0x0000000000185000-memory.dmp

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memory/1860-20-0x0000000000170000-0x0000000000185000-memory.dmp

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memory/1860-17-0x0000000000170000-0x0000000000185000-memory.dmp

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memory/1860-18-0x0000000000170000-0x0000000000185000-memory.dmp

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memory/1860-13-0x0000000000170000-0x0000000000185000-memory.dmp

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memory/4032-14-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/4032-19-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/4032-12-0x00000000009E0000-0x0000000000AE0000-memory.dmp

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memory/4532-5-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/4532-11-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4532-10-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/4532-1-0x00000000008C0000-0x00000000009C0000-memory.dmp

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memory/4532-4-0x0000000000400000-0x0000000000871000-memory.dmp

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memory/4532-2-0x00000000001C0000-0x00000000001D3000-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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