tofsee | e827537be7f9f2851398a94c202be0d1360ac147833fea726f66a7361517fe24

General

Target

70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe
Size

11.1MB
MD5

70cd7dac03e7262761d58616232b837a
SHA1

a93e9fea183cfef7f282f6c9744512433c58c228
SHA256

e827537be7f9f2851398a94c202be0d1360ac147833fea726f66a7361517fe24
SHA512

984e84d757299678bfa013c96526f0439d01f5506e5c63f5566f17ff54cc0d123df249ada2c95bb3ac2204a4991716fd5f614d27dc1ff12b946433080fb340ec
SSDEEP

3072:7rLSAaIXFM9X/WWIyOEfEDQMZWecFKmZ:PNWktyH9V

Score

10^/10

tofsee discovery evasion execution persistence privilege_escalation trojan

Malware Config

Extracted

Family

tofsee

C2

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) 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

Processes:

netsh.exe

pid	Process
648	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\ijwoxyyc\ImagePath = "C:\\Windows\\SysWOW64\\ijwoxyyc\\icebvrbg.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

Processes:

70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid	Process
2392	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

icebvrbg.exe

pid	Process
4500	icebvrbg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

icebvrbg.exe

description	pid	Process	procid_target
PID 4500 set thread context of 2392	4500	icebvrbg.exe	100

Launches sc.exe 3 IoCs

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

Processes:

sc.exesc.exesc.exe

pid	Process
5052	sc.exe
2872	sc.exe
4192	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

Processes:

netsh.exe

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

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

Processes:

icebvrbg.exenetsh.execmd.exesc.exesc.exesc.exesvchost.exe70cd7dac03e7262761d58616232b837a_JaffaCakes118.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icebvrbg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.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	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

70cd7dac03e7262761d58616232b837a_JaffaCakes118.exeicebvrbg.exe

description	pid	Process	procid_target
PID 4824 wrote to memory of 2808	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	87
PID 4824 wrote to memory of 2808	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	87
PID 4824 wrote to memory of 2808	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	87
PID 4824 wrote to memory of 2536	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	89
PID 4824 wrote to memory of 2536	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	89
PID 4824 wrote to memory of 2536	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	89
PID 4824 wrote to memory of 5052	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	91
PID 4824 wrote to memory of 5052	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	91
PID 4824 wrote to memory of 5052	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	91
PID 4824 wrote to memory of 2872	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	93
PID 4824 wrote to memory of 2872	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	93
PID 4824 wrote to memory of 2872	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	93
PID 4824 wrote to memory of 4192	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	97
PID 4824 wrote to memory of 4192	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	97
PID 4824 wrote to memory of 4192	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	97
PID 4500 wrote to memory of 2392	4500	icebvrbg.exe	100
PID 4500 wrote to memory of 2392	4500	icebvrbg.exe	100
PID 4500 wrote to memory of 2392	4500	icebvrbg.exe	100
PID 4500 wrote to memory of 2392	4500	icebvrbg.exe	100
PID 4500 wrote to memory of 2392	4500	icebvrbg.exe	100
PID 4824 wrote to memory of 648	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	101
PID 4824 wrote to memory of 648	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	101
PID 4824 wrote to memory of 648	4824	70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe	101

C:\Users\Admin\AppData\Local\Temp\70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4824
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ijwoxyyc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\icebvrbg.exe" C:\Windows\SysWOW64\ijwoxyyc\
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2536
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ijwoxyyc binPath= "C:\Windows\SysWOW64\ijwoxyyc\icebvrbg.exe /d\"C:\Users\Admin\AppData\Local\Temp\70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:5052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ijwoxyyc "wifi internet conection"
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2872
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ijwoxyyc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4192
- 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:648

C:\Windows\SysWOW64\ijwoxyyc\icebvrbg.exe
C:\Windows\SysWOW64\ijwoxyyc\icebvrbg.exe /d"C:\Users\Admin\AppData\Local\Temp\70cd7dac03e7262761d58616232b837a_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1

T1569

Service Execution

1

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\icebvrbg.exe

Filesize
13.3MB

MD5
73e0fe4ffac3e592c36ff75f084bd881

SHA1
05fa2725780904ebeac5fc0d8f08926ba163d53d

SHA256
98c3c621b956cfa224da47278dafdd31dc371ef768e2d40419b7362311d72bb8

SHA512
75390e3f20b8150491689cad0114b7cf8b14f59aa2605c0bea9d10f614c827ec41670660b195e74aa23ded9c47298212924d70af84820404fb9b39c994bdbe4c

Download Submit
memory/2392-12-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/2392-19-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/2392-18-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/2392-17-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/2392-9-0x0000000000D20000-0x0000000000D35000-memory.dmp

Filesize
84KB

Download
memory/4500-14-0x000000005F000000-0x000000005F011000-memory.dmp

Filesize
68KB

Download
memory/4500-13-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4500-8-0x00000000004A0000-0x00000000004A1000-memory.dmp

Filesize
4KB

Download
memory/4500-6-0x0000000000FF0000-0x0000000000FF1000-memory.dmp

Filesize
4KB

Download
memory/4824-0-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/4824-15-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4824-2-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/4824-1-0x00000000004A0000-0x00000000004A1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads