tofsee | 077a1737b7a3a1caccbb5adfc25ae2f2b7615c3defdd0153c2831eb5066706fa

Analysis

max time kernel
150s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17/08/2024, 01:59

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General

Target
a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe
Size 14.3MB
Sample240817-cehtbstgrr
SHA256 077a1737b7a3a1caccbb5adfc25ae2f2b7615c3defdd0153c2831eb5066706fa
MD5 a0cb05ab32622f45bbd9957e5eb52be2
SHA1 1fe92a35cb439eb0f3d17f1a89b5d9a7c600049b
SHA512 7c645c72ab06e876c88907db3ea5a92cdeb0161103ed0ffbca4b7894a1be18451ccf368553fdedabecfc05c1c3acd24194629242fdae5f21b2ae94e1dc28c0ff
SSDEEP 393216:K88888888888888888888888888888888888888888888888888888888888888U:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation 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) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4372	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\iycpodzb\ImagePath = "C:\\Windows\\SysWOW64\\iycpodzb\\vcalqlzn.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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3140	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1836	vcalqlzn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1836 set thread context of 3140	1836	vcalqlzn.exe	108

Launches sc.exe 3 IoCs

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

pid	Process
1452	sc.exe
1964	sc.exe
4776	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4824	4752	WerFault.exe	83
5080	1836	WerFault.exe	101

System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vcalqlzn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4752 wrote to memory of 4340	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	89
PID 4752 wrote to memory of 4340	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	89
PID 4752 wrote to memory of 4340	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	89
PID 4752 wrote to memory of 2260	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	92
PID 4752 wrote to memory of 2260	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	92
PID 4752 wrote to memory of 2260	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	92
PID 4752 wrote to memory of 1452	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	95
PID 4752 wrote to memory of 1452	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	95
PID 4752 wrote to memory of 1452	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	95
PID 4752 wrote to memory of 1964	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	97
PID 4752 wrote to memory of 1964	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	97
PID 4752 wrote to memory of 1964	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	97
PID 4752 wrote to memory of 4776	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	99
PID 4752 wrote to memory of 4776	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	99
PID 4752 wrote to memory of 4776	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	99
PID 4752 wrote to memory of 4372	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	102
PID 4752 wrote to memory of 4372	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	102
PID 4752 wrote to memory of 4372	4752	a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe	102
PID 1836 wrote to memory of 3140	1836	vcalqlzn.exe	108
PID 1836 wrote to memory of 3140	1836	vcalqlzn.exe	108
PID 1836 wrote to memory of 3140	1836	vcalqlzn.exe	108
PID 1836 wrote to memory of 3140	1836	vcalqlzn.exe	108
PID 1836 wrote to memory of 3140	1836	vcalqlzn.exe	108

C:\Users\Admin\AppData\Local\Temp\a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4752
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iycpodzb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcalqlzn.exe" C:\Windows\SysWOW64\iycpodzb\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2260
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create iycpodzb binPath= "C:\Windows\SysWOW64\iycpodzb\vcalqlzn.exe /d\"C:\Users\Admin\AppData\Local\Temp\a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1452
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description iycpodzb "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1964
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start iycpodzb
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4776
- 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
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:4372
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 572
  2⤵
  - Program crash
  PID:4824

C:\Windows\SysWOW64\iycpodzb\vcalqlzn.exe
C:\Windows\SysWOW64\iycpodzb\vcalqlzn.exe /d"C:\Users\Admin\AppData\Local\Temp\a0cb05ab32622f45bbd9957e5eb52be2_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1836
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:3140
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1836 -s 532
  2⤵
  - Program crash
  PID:5080

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4752 -ip 4752
1⤵
PID:5104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1836 -ip 1836
1⤵
PID:884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

vcalqlzn.exe

Path C:\Users\Admin\AppData\Local\Temp\vcalqlzn.exe
Size 14.3MB
SHA256 077a1737b7a3a1caccbb5adfc25ae2f2b7615c3defdd0153c2831eb5066706fa
MD5 a0cb05ab32622f45bbd9957e5eb52be2
SHA1 1fe92a35cb439eb0f3d17f1a89b5d9a7c600049b
SHA512 7c645c72ab06e876c88907db3ea5a92cdeb0161103ed0ffbca4b7894a1be18451ccf368553fdedabecfc05c1c3acd24194629242fdae5f21b2ae94e1dc28c0ff
SSDEEP 393216:K88888888888888888888888888888888888888888888888888888888888888U:
MD5 SHA1 SHA512 SSDEEP

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memory/1836-13-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1836-11-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1836-12-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1836-19-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/3140-14-0x0000000000D30000-0x0000000000D45000-memory.dmp

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memory/3140-16-0x0000000000D30000-0x0000000000D45000-memory.dmp

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memory/3140-17-0x0000000000D30000-0x0000000000D45000-memory.dmp

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memory/4752-3-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4752-1-0x0000000000690000-0x0000000000790000-memory.dmp

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memory/4752-10-0x0000000000400000-0x0000000000415000-memory.dmp

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memory/4752-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4752-8-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/4752-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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