tofsee | 96cbde3b6581f41951448104432acd2ee0069d14a86ce150d73736c89eae7bd4

Analysis

max time kernel
154s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
03/04/2024, 03:00

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General

Target
9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe
Size 11.3MB
Sample240403-dhmr5aea5v
SHA256 96cbde3b6581f41951448104432acd2ee0069d14a86ce150d73736c89eae7bd4
MD5 9e4a5a885fda8f38847f4f27cf21c52a
SHA1 1b30daa0661d9e0205f9499d6a1b4caa7e9e37f1
SHA512 6bd1ef9ce3e0cdb336ad2d3dd795d0ae00e9736f7349cdaafc87a3192e7ee362a1628ec8d423ef75cc37cb7910c087019e5ae21278f342f750f5ac7e3a5226a9
SSDEEP 196608:fb/////////////////////////////////////////////////////////////f:f
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
4768	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\bysylyqa\ImagePath = "C:\\Windows\\SysWOW64\\bysylyqa\\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	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2316	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3092	orpkelvf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3092 set thread context of 2316	3092	orpkelvf.exe	114

Launches sc.exe 3 IoCs

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

pid	Process
3084	sc.exe
2836	sc.exe
4540	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
4344	4352	WerFault.exe	95
4404	3092	WerFault.exe	111

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4352 wrote to memory of 2004	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	98
PID 4352 wrote to memory of 2004	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	98
PID 4352 wrote to memory of 2004	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	98
PID 4352 wrote to memory of 4876	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	100
PID 4352 wrote to memory of 4876	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	100
PID 4352 wrote to memory of 4876	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	100
PID 4352 wrote to memory of 3084	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	102
PID 4352 wrote to memory of 3084	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	102
PID 4352 wrote to memory of 3084	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	102
PID 4352 wrote to memory of 2836	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	104
PID 4352 wrote to memory of 2836	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	104
PID 4352 wrote to memory of 2836	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	104
PID 4352 wrote to memory of 4540	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	106
PID 4352 wrote to memory of 4540	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	106
PID 4352 wrote to memory of 4540	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	106
PID 4352 wrote to memory of 4768	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	108
PID 4352 wrote to memory of 4768	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	108
PID 4352 wrote to memory of 4768	4352	9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe	108
PID 3092 wrote to memory of 2316	3092	orpkelvf.exe	114
PID 3092 wrote to memory of 2316	3092	orpkelvf.exe	114
PID 3092 wrote to memory of 2316	3092	orpkelvf.exe	114
PID 3092 wrote to memory of 2316	3092	orpkelvf.exe	114
PID 3092 wrote to memory of 2316	3092	orpkelvf.exe	114

C:\Users\Admin\AppData\Local\Temp\9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4352
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bysylyqa\
  2⤵
  PID:2004
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\orpkelvf.exe" C:\Windows\SysWOW64\bysylyqa\
  2⤵
  PID:4876
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bysylyqa binPath= "C:\Windows\SysWOW64\bysylyqa\orpkelvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3084
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bysylyqa "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2836
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bysylyqa
  2⤵
  - Launches sc.exe
  PID:4540
- 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:4768
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4352 -s 1220
  2⤵
  - Program crash
  PID:4344

C:\Windows\SysWOW64\bysylyqa\orpkelvf.exe
C:\Windows\SysWOW64\bysylyqa\orpkelvf.exe /d"C:\Users\Admin\AppData\Local\Temp\9e4a5a885fda8f38847f4f27cf21c52a_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3092
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2316
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3092 -s 512
  2⤵
  - Program crash
  PID:4404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4352 -ip 4352
1⤵
PID:1148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3092 -ip 3092
1⤵
PID:4476

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=3740 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
1⤵
PID:4124

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 11.7MB
SHA256 e3c63934d6738b84b3c73ecf77427a90808f30fcddfa356f8be157d89388a2ae
MD5 df8a1b21538551465900c2af2bc9f6cc
SHA1 cb44ef7b88d1a2e42bd883a0110e10197ef23078
SHA512 3da40f4a9a5ff963e826d3cd22ac8d10531bca1aaaefda67971499f69b8aa9b6fa39fa460fba5a9315101b0fde5a43cdaad7074437175e99d5f3c41d99125a28
SSDEEP 196608:8b//////////////////////////////////////////////////////////////:8
MD5 SHA1 SHA512 SSDEEP

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memory/2316-13-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/2316-21-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/2316-20-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/2316-18-0x0000000000C20000-0x0000000000C35000-memory.dmp

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memory/3092-19-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/3092-14-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/3092-11-0x0000000000B50000-0x0000000000C50000-memory.dmp

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memory/4352-5-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/4352-12-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4352-9-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/4352-1-0x0000000000AA0000-0x0000000000BA0000-memory.dmp

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memory/4352-3-0x0000000000400000-0x0000000000870000-memory.dmp

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memory/4352-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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