tofsee | b222d8c091085629cb82b4933a81057868c19ba08a375d67d19c2ea640e83966

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
30/03/2024, 02:00

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General

Target
3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe
Size 11.6MB
Sample240330-cezf3sef51
SHA256 b222d8c091085629cb82b4933a81057868c19ba08a375d67d19c2ea640e83966
MD5 3104a07da3a3b27632d98dd45a92fa59
SHA1 008cbe83e2d5e16d4b52727c7a71c3a3bc4e8e56
SHA512 a95390307b26950883ab8b2dafd69b995288e51ae978326948a8ec1c8da06d3d5ea112a89b0466065f3d68724adfb1e29f80586e96c0aa9088112ae648d5960d
SSDEEP 6144:Uhs/wyHHRdbJ9yTwvobkepF5b3pi2+ETJcyIjh:UhsYyHHRdbTyUwDpF515+ETN8
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

quadoil.ru
lakeflex.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
3672	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\kycqdbwj\ImagePath = "C:\\Windows\\SysWOW64\\kycqdbwj\\vfkxezyn.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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4508	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3744	vfkxezyn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3744 set thread context of 4508	3744	vfkxezyn.exe	116

Launches sc.exe 3 IoCs

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

pid	Process
4404	sc.exe
3052	sc.exe
2452	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
4492	4844	WerFault.exe	91
4592	3744	WerFault.exe	109

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 1940	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	95
PID 4844 wrote to memory of 1940	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	95
PID 4844 wrote to memory of 1940	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	95
PID 4844 wrote to memory of 1840	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	99
PID 4844 wrote to memory of 1840	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	99
PID 4844 wrote to memory of 1840	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	99
PID 4844 wrote to memory of 4404	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	101
PID 4844 wrote to memory of 4404	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	101
PID 4844 wrote to memory of 4404	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	101
PID 4844 wrote to memory of 3052	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	105
PID 4844 wrote to memory of 3052	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	105
PID 4844 wrote to memory of 3052	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	105
PID 4844 wrote to memory of 2452	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	107
PID 4844 wrote to memory of 2452	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	107
PID 4844 wrote to memory of 2452	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	107
PID 4844 wrote to memory of 3672	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	110
PID 4844 wrote to memory of 3672	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	110
PID 4844 wrote to memory of 3672	4844	3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe	110
PID 3744 wrote to memory of 4508	3744	vfkxezyn.exe	116
PID 3744 wrote to memory of 4508	3744	vfkxezyn.exe	116
PID 3744 wrote to memory of 4508	3744	vfkxezyn.exe	116
PID 3744 wrote to memory of 4508	3744	vfkxezyn.exe	116
PID 3744 wrote to memory of 4508	3744	vfkxezyn.exe	116

C:\Users\Admin\AppData\Local\Temp\3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kycqdbwj\
  2⤵
  PID:1940
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vfkxezyn.exe" C:\Windows\SysWOW64\kycqdbwj\
  2⤵
  PID:1840
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create kycqdbwj binPath= "C:\Windows\SysWOW64\kycqdbwj\vfkxezyn.exe /d\"C:\Users\Admin\AppData\Local\Temp\3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:4404
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description kycqdbwj "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start kycqdbwj
  2⤵
  - Launches sc.exe
  PID:2452
- 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:3672
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4844 -s 572
  2⤵
  - Program crash
  PID:4492

C:\Windows\SysWOW64\kycqdbwj\vfkxezyn.exe
C:\Windows\SysWOW64\kycqdbwj\vfkxezyn.exe /d"C:\Users\Admin\AppData\Local\Temp\3104a07da3a3b27632d98dd45a92fa59_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3744
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4508
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 516
  2⤵
  - Program crash
  PID:4592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4844 -ip 4844
1⤵
PID:3516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3744 -ip 3744
1⤵
PID:5080

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=3724 --field-trial-handle=2972,i,4036376905309803364,5412922217215781933,262144 --variations-seed-version /prefetch:8
1⤵
PID:1392

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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vfkxezyn.exe

Path C:\Users\Admin\AppData\Local\Temp\vfkxezyn.exe
Size 13.4MB
SHA256 11938764a674441c53a960fa3d8d3da4251aca4b350b033335f7f9840f9a016a
MD5 f7e99017b50441e95218c8286832ca9f
SHA1 c39c05c5f8d09f490045a63ef58ee6dbb6821113
SHA512 8cfe916392076c0a8d947c2775b14c3744193761c6df4edb5c533b684742553fcb68350f82abb3803f7d7be81406533693791c85e25dca169e222091f241b194
SSDEEP 6144:6hs/wyHHRdbJ9yTwvobkepF5b3pi2+ETJcyIjh:6hsYyHHRdbTyUwDpF515+ETN8
MD5 SHA1 SHA512 SSDEEP

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memory/3744-10-0x0000000001A40000-0x0000000001B40000-memory.dmp

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memory/3744-13-0x0000000000400000-0x00000000016C0000-memory.dmp

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memory/3744-17-0x0000000000400000-0x00000000016C0000-memory.dmp

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memory/4508-11-0x00000000005A0000-0x00000000005B5000-memory.dmp

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memory/4508-15-0x00000000005A0000-0x00000000005B5000-memory.dmp

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memory/4508-16-0x00000000005A0000-0x00000000005B5000-memory.dmp

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memory/4508-18-0x00000000005A0000-0x00000000005B5000-memory.dmp

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memory/4844-4-0x0000000000400000-0x00000000016C0000-memory.dmp

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memory/4844-2-0x0000000001860000-0x0000000001873000-memory.dmp

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memory/4844-8-0x0000000000400000-0x00000000016C0000-memory.dmp

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memory/4844-9-0x0000000001860000-0x0000000001873000-memory.dmp

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memory/4844-1-0x00000000018B0000-0x00000000019B0000-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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