tofsee | d9cc026783b0511da70d785bbd3093e11bb0927115bc7409d25b1c9ae3d1e7e1

General

Target

f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
Size

14.7MB
MD5

f75321be65ccd1fb27f978e8ec360738
SHA1

60cefa28535cc8f77cc1b8e6aaf03ba6762f5e38
SHA256

d9cc026783b0511da70d785bbd3093e11bb0927115bc7409d25b1c9ae3d1e7e1
SHA512

81e650c4e50195dadec6f1bde08c4296cf1938fbe7563bd5598f824558e047dcc0030c0e9d99ec89ea41c4905c309254e8717c4e910470afd4d95a7bd6e5ff22
SSDEEP

12288:GRXQK44fy611111111111111111111111111111111111111111111111111111H:GRx2

Score

10^/10

tofsee evasion 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) 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

4400 netsh.exe

pid	process
4400	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\wvaacnfv\ImagePath = "C:\\Windows\\SysWOW64\\wvaacnfv\\dlaerpyy.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:

f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1648 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

dlaerpyy.exe

pid process

3008 dlaerpyy.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

dlaerpyy.exe

description pid process target process

PID 3008 set thread context of 1648 3008 dlaerpyy.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

4076 sc.exe
2292 sc.exe
3508 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1648	svchost.exe

pid	process
3008	dlaerpyy.exe

description	pid	process	target process
PID 3008 set thread context of 1648	3008	dlaerpyy.exe	svchost.exe

pid	process
4076	sc.exe
2292	sc.exe
3508	sc.exe

Program crash 21 IoCs

Processes:

WerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exeWerFault.exe

pid	pid_target	process	target process
3596	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
1340	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
1140	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
4640	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
4208	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
2592	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
4484	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
2784	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
4248	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
4864	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
1804	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
2200	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
3720	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
4384	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
2880	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
2596	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
1264	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
2120	1980	WerFault.exe	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
3716	3008	WerFault.exe	dlaerpyy.exe
1252	3008	WerFault.exe	dlaerpyy.exe
2012	3008	WerFault.exe	dlaerpyy.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exedlaerpyy.exe

description	pid	process	target process
PID 1980 wrote to memory of 3360	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	cmd.exe
PID 1980 wrote to memory of 3360	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	cmd.exe
PID 1980 wrote to memory of 3360	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	cmd.exe
PID 1980 wrote to memory of 208	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	cmd.exe
PID 1980 wrote to memory of 208	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	cmd.exe
PID 1980 wrote to memory of 208	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	cmd.exe
PID 1980 wrote to memory of 4076	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 4076	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 4076	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 2292	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 2292	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 2292	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 3508	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 3508	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 3508	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	sc.exe
PID 1980 wrote to memory of 4400	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	netsh.exe
PID 1980 wrote to memory of 4400	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	netsh.exe
PID 1980 wrote to memory of 4400	1980	f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe	netsh.exe
PID 3008 wrote to memory of 1648	3008	dlaerpyy.exe	svchost.exe
PID 3008 wrote to memory of 1648	3008	dlaerpyy.exe	svchost.exe
PID 3008 wrote to memory of 1648	3008	dlaerpyy.exe	svchost.exe
PID 3008 wrote to memory of 1648	3008	dlaerpyy.exe	svchost.exe
PID 3008 wrote to memory of 1648	3008	dlaerpyy.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1980

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 588
2⤵
- Program crash
PID:3596

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 828
2⤵
- Program crash
PID:1340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 836
2⤵
- Program crash
PID:1140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 960
2⤵
- Program crash
PID:4640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 992
2⤵
- Program crash
PID:4208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 1000
2⤵
- Program crash
PID:2592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 1008
2⤵
- Program crash
PID:4484

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wvaacnfv\
2⤵
PID:3360

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 908
2⤵
- Program crash
PID:2784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 604
2⤵
- Program crash
PID:4248

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dlaerpyy.exe" C:\Windows\SysWOW64\wvaacnfv\
2⤵
PID:208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 772
2⤵
- Program crash
PID:4864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 904
2⤵
- Program crash
PID:1804

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create wvaacnfv binPath= "C:\Windows\SysWOW64\wvaacnfv\dlaerpyy.exe /d\"C:\Users\Admin\AppData\Local\Temp\f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 784
2⤵
- Program crash
PID:2200

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 676
2⤵
- Program crash
PID:3720

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description wvaacnfv "wifi internet conection"
2⤵
- Launches sc.exe
PID:2292

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 640
2⤵
- Program crash
PID:4384

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 1108
2⤵
- Program crash
PID:2880

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start wvaacnfv
2⤵
- Launches sc.exe
PID:3508

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 1216
2⤵
- Program crash
PID:2596

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 792
2⤵
- Program crash
PID:1264

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:4400

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 1168
2⤵
- Program crash
PID:2120

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1980 -ip 1980
1⤵
PID:3652

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1980 -ip 1980
1⤵
PID:972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1980 -ip 1980
1⤵
PID:4424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 1980 -ip 1980
1⤵
PID:228

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1980 -ip 1980
1⤵
PID:4804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 1980 -ip 1980
1⤵
PID:1584

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1980 -ip 1980
1⤵
PID:3448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 1980 -ip 1980
1⤵
PID:1268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1980 -ip 1980
1⤵
PID:548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1980 -ip 1980
1⤵
PID:2776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1980 -ip 1980
1⤵
PID:5052

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 1980 -ip 1980
1⤵
PID:4988

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1980 -ip 1980
1⤵
PID:1452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 1980 -ip 1980
1⤵
PID:3956

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 1980 -ip 1980
1⤵
PID:4344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 1980 -ip 1980
1⤵
PID:3544

C:\Windows\SysWOW64\wvaacnfv\dlaerpyy.exe
C:\Windows\SysWOW64\wvaacnfv\dlaerpyy.exe /d"C:\Users\Admin\AppData\Local\Temp\f75321be65ccd1fb27f978e8ec360738_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3008 -s 252
2⤵
- Program crash
PID:3716

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:1648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3008 -s 532
2⤵
- Program crash
PID:1252

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3008 -s 552
2⤵
- Program crash
PID:2012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 1980 -ip 1980
1⤵
PID:2112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1980 -ip 1980
1⤵
PID:1072

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 3008 -ip 3008
1⤵
PID:3224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 3008 -ip 3008
1⤵
PID:1520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3008 -ip 3008
1⤵
PID:1768

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\dlaerpyy.exe
Filesize
12.9MB

MD5
e0477701ae4751fccdaf80671baec763

SHA1
c55e8b77e1eba4d48e09f02dc36c83e683dce5a1

SHA256
6a1909a333d49dccc8145ee5762c911ec7795b959372a49136d6cd918aebe7d3

SHA512
30bf39736f325c8df0ef2d6c87f9fe651a0ac77ee7716b65e76cb7c7d070244e4c93b4083aea898e488e3b4f91d93e48df11d968b1764ad29d200fe2175a97e6

Download Submit
memory/1648-16-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/1648-12-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/1648-17-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/1648-19-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

Filesize
84KB

Download
memory/1980-4-0x0000000000400000-0x0000000003359000-memory.dmp

Filesize
47.3MB

Download
memory/1980-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1980-7-0x0000000000400000-0x0000000003359000-memory.dmp

Filesize
47.3MB

Download
memory/1980-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/1980-1-0x00000000035F0000-0x00000000036F0000-memory.dmp

Filesize
1024KB

Download
memory/3008-10-0x0000000000400000-0x0000000003359000-memory.dmp

Filesize
47.3MB

Download
memory/3008-11-0x00000000034D0000-0x00000000035D0000-memory.dmp

Filesize
1024KB

Download
memory/3008-18-0x0000000000400000-0x0000000003359000-memory.dmp

Filesize
47.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads