tofsee | 7a975f0197744ff65ed0c6ab56576c5b40bf11176e6f43f9945072a9bb3660e0

Analysis

max time kernel
144s
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
15/04/2024, 23:00

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General

Target
f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe
Size 13.1MB
Sample240415-2yzcvsaf26
SHA256 7a975f0197744ff65ed0c6ab56576c5b40bf11176e6f43f9945072a9bb3660e0
MD5 f21f4614358cdb18bcc75489077f6e50
SHA1 3fbcc2f1bd4dce604cfb468ef882ce93388f1015
SHA512 95f8f87568983cc69a13b4d023520364e52ceb241474aeb1bd4a91b59d483b002653c15b0bb6b9b8aff76f363a305aabc03872696440f76f0e2e1e71431583c5
SSDEEP 49152:Yjrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrj:e
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
4124	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\smacvtjr\ImagePath = "C:\\Windows\\SysWOW64\\smacvtjr\\vhicxtur.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	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4336	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2120	vhicxtur.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2120 set thread context of 4336	2120	vhicxtur.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
1456	sc.exe
3800	sc.exe
1604	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 1616 wrote to memory of 3972	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	91
PID 1616 wrote to memory of 3972	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	91
PID 1616 wrote to memory of 3972	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	91
PID 1616 wrote to memory of 2892	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	93
PID 1616 wrote to memory of 2892	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	93
PID 1616 wrote to memory of 2892	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	93
PID 1616 wrote to memory of 1456	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	95
PID 1616 wrote to memory of 1456	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	95
PID 1616 wrote to memory of 1456	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	95
PID 1616 wrote to memory of 3800	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	97
PID 1616 wrote to memory of 3800	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	97
PID 1616 wrote to memory of 3800	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	97
PID 1616 wrote to memory of 1604	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	99
PID 1616 wrote to memory of 1604	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	99
PID 1616 wrote to memory of 1604	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	99
PID 1616 wrote to memory of 4124	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	101
PID 1616 wrote to memory of 4124	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	101
PID 1616 wrote to memory of 4124	1616	f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe	101
PID 2120 wrote to memory of 4336	2120	vhicxtur.exe	104
PID 2120 wrote to memory of 4336	2120	vhicxtur.exe	104
PID 2120 wrote to memory of 4336	2120	vhicxtur.exe	104
PID 2120 wrote to memory of 4336	2120	vhicxtur.exe	104
PID 2120 wrote to memory of 4336	2120	vhicxtur.exe	104

C:\Users\Admin\AppData\Local\Temp\f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1616
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\smacvtjr\
  2⤵
  PID:3972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vhicxtur.exe" C:\Windows\SysWOW64\smacvtjr\
  2⤵
  PID:2892
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create smacvtjr binPath= "C:\Windows\SysWOW64\smacvtjr\vhicxtur.exe /d\"C:\Users\Admin\AppData\Local\Temp\f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1456
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description smacvtjr "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3800
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start smacvtjr
  2⤵
  - Launches sc.exe
  PID:1604
- 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:4124

C:\Windows\SysWOW64\smacvtjr\vhicxtur.exe
C:\Windows\SysWOW64\smacvtjr\vhicxtur.exe /d"C:\Users\Admin\AppData\Local\Temp\f21f4614358cdb18bcc75489077f6e50_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2120
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:4336

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=4396 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
1⤵
PID:4468

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

vhicxtur.exe

Path C:\Users\Admin\AppData\Local\Temp\vhicxtur.exe
Size 12.0MB
SHA256 0b3518a5cf0c37ac2aa85ce62306dfcc375fffe217c7760ae254a0fe3e8ccae1
MD5 494d6c5871990741477b194be024793d
SHA1 46f311ec27da687404ee0e1fdd16f422983992bb
SHA512 f00d670fed31c6967a186592e1e82222abbe9c13d88a97fc2e8ad6a969ad96d4d5af8703944120ad2015cbb6f2ecd3b7509812ae28eebe2eb474c98320ec96e6
SSDEEP 49152:Njrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr/:9
MD5 SHA1 SHA512 SSDEEP

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memory/1616-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1616-2-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1616-3-0x0000000000500000-0x0000000000501000-memory.dmp

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memory/1616-1-0x00000000004F0000-0x00000000004F1000-memory.dmp

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memory/1616-6-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2120-8-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2120-9-0x0000000000580000-0x0000000000581000-memory.dmp

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memory/2120-13-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4336-11-0x0000000000A90000-0x0000000000AA5000-memory.dmp

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memory/4336-16-0x0000000000A90000-0x0000000000AA5000-memory.dmp

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memory/4336-17-0x0000000000A90000-0x0000000000AA5000-memory.dmp

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memory/4336-18-0x0000000000A90000-0x0000000000AA5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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