tofsee | 7e8a5dedb5852ba8f9f3970c0204657611bb7b3e8009c019e7105b7528111403

General

Target

79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe
Size

120KB
MD5

79214841917d19ed5226a021dd2d8c7d
SHA1

48082025c975b8e060ed37fac928df5ebcd6375f
SHA256

7e8a5dedb5852ba8f9f3970c0204657611bb7b3e8009c019e7105b7528111403
SHA512

8f82b620de851ee6bc45d77aa01b0fc9876c2168319b3fd78bc08cb0a01871238e755b266e6413fe8c464d32d5d3bd7b32600752c3be55a9eb9281c4008a9fe5
SSDEEP

3072:tOLuSAK9akBThPFu6wJnpo33ebEvTHM4O:wE2aiFkJnpjbEjM4

Score

10^/10

tofsee evasion execution persistence 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

1920 netsh.exe

pid	process
1920	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\ccpsviyv\ImagePath = "C:\\Windows\\SysWOW64\\ccpsviyv\\nlsonwul.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:

79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

2904 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

nlsonwul.exe

pid process

3528 nlsonwul.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

nlsonwul.exe

description pid process target process

PID 3528 set thread context of 2904 3528 nlsonwul.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1600 sc.exe
2052 sc.exe
3968 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2904	svchost.exe

pid	process
3528	nlsonwul.exe

description	pid	process	target process
PID 3528 set thread context of 2904	3528	nlsonwul.exe	svchost.exe

pid	process
1600	sc.exe
2052	sc.exe
3968	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exenlsonwul.exe

description	pid	process	target process
PID 2824 wrote to memory of 3576	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	cmd.exe
PID 2824 wrote to memory of 3576	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	cmd.exe
PID 2824 wrote to memory of 3576	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	cmd.exe
PID 2824 wrote to memory of 2216	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	cmd.exe
PID 2824 wrote to memory of 2216	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	cmd.exe
PID 2824 wrote to memory of 2216	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	cmd.exe
PID 2824 wrote to memory of 2052	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 2824 wrote to memory of 2052	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 2824 wrote to memory of 2052	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 2824 wrote to memory of 3968	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 2824 wrote to memory of 3968	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 2824 wrote to memory of 3968	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 2824 wrote to memory of 1600	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 2824 wrote to memory of 1600	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 2824 wrote to memory of 1600	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	sc.exe
PID 3528 wrote to memory of 2904	3528	nlsonwul.exe	svchost.exe
PID 3528 wrote to memory of 2904	3528	nlsonwul.exe	svchost.exe
PID 3528 wrote to memory of 2904	3528	nlsonwul.exe	svchost.exe
PID 3528 wrote to memory of 2904	3528	nlsonwul.exe	svchost.exe
PID 3528 wrote to memory of 2904	3528	nlsonwul.exe	svchost.exe
PID 2824 wrote to memory of 1920	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	netsh.exe
PID 2824 wrote to memory of 1920	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	netsh.exe
PID 2824 wrote to memory of 1920	2824	79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2824
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ccpsviyv\
  2⤵
  PID:3576
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nlsonwul.exe" C:\Windows\SysWOW64\ccpsviyv\
  2⤵
  PID:2216
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create ccpsviyv binPath= "C:\Windows\SysWOW64\ccpsviyv\nlsonwul.exe /d\"C:\Users\Admin\AppData\Local\Temp\79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2052
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description ccpsviyv "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3968
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start ccpsviyv
  2⤵
  - Launches sc.exe
  PID:1600
- 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:1920

C:\Windows\SysWOW64\ccpsviyv\nlsonwul.exe
C:\Windows\SysWOW64\ccpsviyv\nlsonwul.exe /d"C:\Users\Admin\AppData\Local\Temp\79214841917d19ed5226a021dd2d8c7d_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3528
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2904

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

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

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
10.5MB

MD5
df96fb4d51e2cbd195eace8fde69a06c

SHA1
80dc5bcb38e1adaa05211bd3c8c574f806a3301e

SHA256
5d647637ed491ccf88da0306ed542d511347398ab394d4ccf3573b6eb87c81fc

SHA512
03518b40be3f012c798aa41766135d7173132101f624cecc0589155baa1bcd4f82d84c78c4c3d312a093f13421188b806cdc58d3f4a12a4519d2538c490f5c49

Download Submit
memory/2824-13-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2824-0-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2824-2-0x00000000004A0000-0x00000000004A1000-memory.dmp

Filesize
4KB

Download
memory/2824-1-0x0000000002240000-0x0000000002241000-memory.dmp

Filesize
4KB

Download
memory/2904-8-0x0000000000360000-0x0000000000375000-memory.dmp

Filesize
84KB

Download
memory/2904-12-0x0000000000360000-0x0000000000375000-memory.dmp

Filesize
84KB

Download
memory/2904-14-0x0000000000360000-0x0000000000375000-memory.dmp

Filesize
84KB

Download
memory/2904-15-0x0000000000360000-0x0000000000375000-memory.dmp

Filesize
84KB

Download
memory/2904-16-0x0000000000360000-0x0000000000375000-memory.dmp

Filesize
84KB

Download
memory/3528-6-0x0000000000FC0000-0x0000000000FC1000-memory.dmp

Filesize
4KB

Download
memory/3528-7-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3528-11-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads