tofsee | e5badbae1af7bd777e66282cf56e38e6a5bc75063f5b9342b4bd6571836cea63

General

Target

f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe
Size

14.9MB
MD5

f3cc40d0eeb5bc12926970e04a727ee5
SHA1

00a858fd157c5a5d663ab170bdfabb99088b0568
SHA256

e5badbae1af7bd777e66282cf56e38e6a5bc75063f5b9342b4bd6571836cea63
SHA512

78d2876fa7ccf822ac4cfdb8e42e0c6b4b5e4b3a344c1337d05d0e86d849a9392e541bc45aa95fcae0d6fd84383460efbcd60612a5a4e87748aecd0e0b5d8840
SSDEEP

49152:r8KGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGy:r8

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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

Processes:

netsh.exe

pid process

2804 netsh.exe

pid	process
2804	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\osyxmwzc\ImagePath = "C:\\Windows\\SysWOW64\\osyxmwzc\\gvzdtgxx.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:

f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4092317236-2027488869-1227795436-1000\Control Panel\International\Geo\Nation	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1268 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

gvzdtgxx.exe

pid process

2820 gvzdtgxx.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

gvzdtgxx.exe

description pid process target process

PID 2820 set thread context of 1268 2820 gvzdtgxx.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

1496 sc.exe
2844 sc.exe
1048 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

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

3488 4136 WerFault.exe f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe
1928 2820 WerFault.exe gvzdtgxx.exe

pid	process
1268	svchost.exe

pid	process
2820	gvzdtgxx.exe

description	pid	process	target process
PID 2820 set thread context of 1268	2820	gvzdtgxx.exe	svchost.exe

pid	process
1496	sc.exe
2844	sc.exe
1048	sc.exe

pid	pid_target	process	target process
3488	4136	WerFault.exe	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe
1928	2820	WerFault.exe	gvzdtgxx.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exegvzdtgxx.exe

description	pid	process	target process
PID 4136 wrote to memory of 2340	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	cmd.exe
PID 4136 wrote to memory of 2340	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	cmd.exe
PID 4136 wrote to memory of 2340	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	cmd.exe
PID 4136 wrote to memory of 3324	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	cmd.exe
PID 4136 wrote to memory of 3324	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	cmd.exe
PID 4136 wrote to memory of 3324	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	cmd.exe
PID 4136 wrote to memory of 1496	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 1496	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 1496	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 2844	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 2844	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 2844	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 1048	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 1048	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 1048	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	sc.exe
PID 4136 wrote to memory of 2804	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	netsh.exe
PID 4136 wrote to memory of 2804	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	netsh.exe
PID 4136 wrote to memory of 2804	4136	f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe	netsh.exe
PID 2820 wrote to memory of 1268	2820	gvzdtgxx.exe	svchost.exe
PID 2820 wrote to memory of 1268	2820	gvzdtgxx.exe	svchost.exe
PID 2820 wrote to memory of 1268	2820	gvzdtgxx.exe	svchost.exe
PID 2820 wrote to memory of 1268	2820	gvzdtgxx.exe	svchost.exe
PID 2820 wrote to memory of 1268	2820	gvzdtgxx.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4136

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\osyxmwzc\
2⤵
PID:2340

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gvzdtgxx.exe" C:\Windows\SysWOW64\osyxmwzc\
2⤵
PID:3324

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create osyxmwzc binPath= "C:\Windows\SysWOW64\osyxmwzc\gvzdtgxx.exe /d\"C:\Users\Admin\AppData\Local\Temp\f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1496

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description osyxmwzc "wifi internet conection"
2⤵
- Launches sc.exe
PID:2844

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start osyxmwzc
2⤵
- Launches sc.exe
PID:1048

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:2804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4136 -s 1192
2⤵
- Program crash
PID:3488

C:\Windows\SysWOW64\osyxmwzc\gvzdtgxx.exe
C:\Windows\SysWOW64\osyxmwzc\gvzdtgxx.exe /d"C:\Users\Admin\AppData\Local\Temp\f3cc40d0eeb5bc12926970e04a727ee5_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2820

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2820 -s 516
2⤵
- Program crash
PID:1928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4136 -ip 4136
1⤵
PID:3908

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 376 -p 2820 -ip 2820
1⤵
PID:2916

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\gvzdtgxx.exe
Filesize
12.4MB

MD5
2b0a78d4177691ad17311fa9f64f4305

SHA1
5f4c61dacf436b8e93ed273005b5e1c43ee90dc3

SHA256
af53aac6bb28d36648e1c511b31072cc3d31d5e7b1403509d7852230f6fef461

SHA512
e4b94f5311d603696e88d93152aa56ba3f13f4188e7868c284c76d49d0e71ce4c83b4803b93e1fe388ba839b85650c7e8f1d387a33a9e502e3adeb6df0b3b108

Download Submit
memory/1268-15-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/1268-11-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/1268-16-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/1268-17-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/1268-19-0x0000000000E00000-0x0000000000E15000-memory.dmp

Filesize
84KB

Download
memory/2820-10-0x0000000000EB0000-0x0000000000FB0000-memory.dmp

Filesize
1024KB

Download
memory/2820-12-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/2820-18-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/4136-4-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/4136-2-0x0000000000EC0000-0x0000000000ED3000-memory.dmp

Filesize
76KB

Download
memory/4136-7-0x0000000000400000-0x0000000000C14000-memory.dmp

Filesize
8.1MB

Download
memory/4136-8-0x0000000000EC0000-0x0000000000ED3000-memory.dmp

Filesize
76KB

Download
memory/4136-1-0x0000000000F70000-0x0000000001070000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads