tofsee | a76d1b8d639dd74017ff5501f34a3cb2b59a0730b87a3663c82137a523ef23e3

General

Target

f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe
Size

13.1MB
MD5

f1bcb7d5244183f7769af344a006781e
SHA1

9a4fb8b9d36d1093b907bd00beb2244d13383300
SHA256

a76d1b8d639dd74017ff5501f34a3cb2b59a0730b87a3663c82137a523ef23e3
SHA512

8976637ed27c92e7f1a036e33885091a075727d1b56b4ecccddb9b02121d54e539888ebe7ef09dca410691fa41311fdfe73cb69a96c8134e70130e69d77b54f5
SSDEEP

49152:T1yvllllllllllllllllllllllllllllllllllllllllllllllllllllllllllln:TA

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

3028 netsh.exe

pid	process
3028	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\xrzcndsn\ImagePath = "C:\\Windows\\SysWOW64\\xrzcndsn\\wfzewvqm.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:

f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3456 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

wfzewvqm.exe

pid process

892 wfzewvqm.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

wfzewvqm.exe

description pid process target process

PID 892 set thread context of 3456 892 wfzewvqm.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

4416 sc.exe
3820 sc.exe
2004 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

4848 2044 WerFault.exe f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe
4436 892 WerFault.exe wfzewvqm.exe

pid	process
3456	svchost.exe

pid	process
892	wfzewvqm.exe

description	pid	process	target process
PID 892 set thread context of 3456	892	wfzewvqm.exe	svchost.exe

pid	process
4416	sc.exe
3820	sc.exe
2004	sc.exe

pid	pid_target	process	target process
4848	2044	WerFault.exe	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe
4436	892	WerFault.exe	wfzewvqm.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exewfzewvqm.exe

description	pid	process	target process
PID 2044 wrote to memory of 4424	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	cmd.exe
PID 2044 wrote to memory of 4424	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	cmd.exe
PID 2044 wrote to memory of 4424	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	cmd.exe
PID 2044 wrote to memory of 5056	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	cmd.exe
PID 2044 wrote to memory of 5056	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	cmd.exe
PID 2044 wrote to memory of 5056	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	cmd.exe
PID 2044 wrote to memory of 4416	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 4416	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 4416	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 3820	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 3820	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 3820	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 2004	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 2004	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 2004	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	sc.exe
PID 2044 wrote to memory of 3028	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	netsh.exe
PID 2044 wrote to memory of 3028	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	netsh.exe
PID 2044 wrote to memory of 3028	2044	f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe	netsh.exe
PID 892 wrote to memory of 3456	892	wfzewvqm.exe	svchost.exe
PID 892 wrote to memory of 3456	892	wfzewvqm.exe	svchost.exe
PID 892 wrote to memory of 3456	892	wfzewvqm.exe	svchost.exe
PID 892 wrote to memory of 3456	892	wfzewvqm.exe	svchost.exe
PID 892 wrote to memory of 3456	892	wfzewvqm.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2044

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xrzcndsn\
2⤵
PID:4424

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wfzewvqm.exe" C:\Windows\SysWOW64\xrzcndsn\
2⤵
PID:5056

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create xrzcndsn binPath= "C:\Windows\SysWOW64\xrzcndsn\wfzewvqm.exe /d\"C:\Users\Admin\AppData\Local\Temp\f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4416

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description xrzcndsn "wifi internet conection"
2⤵
- Launches sc.exe
PID:3820

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start xrzcndsn
2⤵
- Launches sc.exe
PID:2004

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:3028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 1048
2⤵
- Program crash
PID:4848

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3780,i,107393453197044369,3794435770200482906,262144 --variations-seed-version --mojo-platform-channel-handle=3164 /prefetch:8
1⤵
PID:4604

C:\Windows\SysWOW64\xrzcndsn\wfzewvqm.exe
C:\Windows\SysWOW64\xrzcndsn\wfzewvqm.exe /d"C:\Users\Admin\AppData\Local\Temp\f1bcb7d5244183f7769af344a006781e_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:892

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:3456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 892 -s 516
2⤵
- Program crash
PID:4436

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2044 -ip 2044
1⤵
PID:3676

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 892 -ip 892
1⤵
PID:2348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\wfzewvqm.exe

Filesize
12.6MB

MD5
67402c1c75f5bc7b8a4f25a6a8e87a70

SHA1
4c0492b43f375bfefbd038906ea2c092edf759ed

SHA256
d797f988138be6ef0f7dc9817432a1e6499827dfe8b62775dc117e02449cfb5a

SHA512
d5024e0184d79396b2f94afe376d510af4d0f4a6bc9f8890dd321e7855c97f653f1968360d874547148814a66e0342d0356e2281d6ef3c4839b798e3ee9b1cf9

Download Submit
memory/892-10-0x0000000000E10000-0x0000000000F10000-memory.dmp

Filesize
1024KB

Download
memory/892-13-0x0000000000400000-0x0000000000C20000-memory.dmp

Filesize
8.1MB

Download
memory/892-17-0x0000000000400000-0x0000000000C20000-memory.dmp

Filesize
8.1MB

Download
memory/2044-4-0x0000000000400000-0x0000000000C20000-memory.dmp

Filesize
8.1MB

Download
memory/2044-2-0x0000000002820000-0x0000000002833000-memory.dmp

Filesize
76KB

Download
memory/2044-7-0x0000000000400000-0x0000000000C20000-memory.dmp

Filesize
8.1MB

Download
memory/2044-8-0x0000000002820000-0x0000000002833000-memory.dmp

Filesize
76KB

Download
memory/2044-1-0x0000000000D80000-0x0000000000E80000-memory.dmp

Filesize
1024KB

Download
memory/3456-11-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download
memory/3456-16-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download
memory/3456-18-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download
memory/3456-19-0x0000000000530000-0x0000000000545000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads