tofsee | 2127d8998f0d3f04259848e7f11e6353cf71078cacfd2c23b6276323cead9718

General

Target

f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe
Size

14.8MB
MD5

f2e83482658169cfb723595f03ed4c73
SHA1

5974b5b2d036ab80ac3a823406e69d1e56a930f7
SHA256

2127d8998f0d3f04259848e7f11e6353cf71078cacfd2c23b6276323cead9718
SHA512

b7a6e94181f7edc606fbc6aa0f8f768f7a684c6f13a8d945fe5b749f8a689b9a90d27bd01cd4ae74a7498a03d67ecd0d585eb4b3555ce20b78176bac17736a6f
SSDEEP

6144:gvk9RADRUv1CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC3:ZRAD

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

4412 netsh.exe

pid	process
4412	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\eetzfolv\ImagePath = "C:\\Windows\\SysWOW64\\eetzfolv\\gidulfmf.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:

f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3696 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

gidulfmf.exe

pid process

2904 gidulfmf.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

gidulfmf.exe

description pid process target process

PID 2904 set thread context of 3696 2904 gidulfmf.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

4580 sc.exe
224 sc.exe
3280 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3696	svchost.exe

pid	process
2904	gidulfmf.exe

description	pid	process	target process
PID 2904 set thread context of 3696	2904	gidulfmf.exe	svchost.exe

pid	process
4580	sc.exe
224	sc.exe
3280	sc.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exegidulfmf.exe

description	pid	process	target process
PID 4028 wrote to memory of 3120	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	cmd.exe
PID 4028 wrote to memory of 3120	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	cmd.exe
PID 4028 wrote to memory of 3120	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	cmd.exe
PID 4028 wrote to memory of 3996	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	cmd.exe
PID 4028 wrote to memory of 3996	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	cmd.exe
PID 4028 wrote to memory of 3996	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	cmd.exe
PID 4028 wrote to memory of 4580	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 4580	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 4580	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 224	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 224	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 224	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 3280	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 3280	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 3280	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	sc.exe
PID 4028 wrote to memory of 4412	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	netsh.exe
PID 4028 wrote to memory of 4412	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	netsh.exe
PID 4028 wrote to memory of 4412	4028	f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe	netsh.exe
PID 2904 wrote to memory of 3696	2904	gidulfmf.exe	svchost.exe
PID 2904 wrote to memory of 3696	2904	gidulfmf.exe	svchost.exe
PID 2904 wrote to memory of 3696	2904	gidulfmf.exe	svchost.exe
PID 2904 wrote to memory of 3696	2904	gidulfmf.exe	svchost.exe
PID 2904 wrote to memory of 3696	2904	gidulfmf.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4028

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eetzfolv\
2⤵
PID:3120

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gidulfmf.exe" C:\Windows\SysWOW64\eetzfolv\
2⤵
PID:3996

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create eetzfolv binPath= "C:\Windows\SysWOW64\eetzfolv\gidulfmf.exe /d\"C:\Users\Admin\AppData\Local\Temp\f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4580

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description eetzfolv "wifi internet conection"
2⤵
- Launches sc.exe
PID:224

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start eetzfolv
2⤵
- Launches sc.exe
PID:3280

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:4412

C:\Windows\SysWOW64\eetzfolv\gidulfmf.exe
C:\Windows\SysWOW64\eetzfolv\gidulfmf.exe /d"C:\Users\Admin\AppData\Local\Temp\f2e83482658169cfb723595f03ed4c73_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2904

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:3696

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 --mojo-platform-channel-handle=3644 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:4016

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\gidulfmf.exe
Filesize
11.6MB

MD5
28d85f0c0190db876bb6849d34c3424d

SHA1
bd38bb101ef716d9f2723a9f6a1216385a9062a5

SHA256
66015469685512ebaac33725e2e9bb822ec4a50a10ac74cc69069719e1c9e39b

SHA512
9ae4ad4cb4e18380205787f31955d6537db4495fd6fe3417b83b6ff13f2ea0379edde9f954a2326814ab132bc2c74bdffc58bf46c0228b85212fe9573d05c09f

Download Submit
memory/2904-8-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2904-7-0x00000000004A0000-0x00000000004A1000-memory.dmp

Filesize
4KB

Download
memory/2904-11-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3696-9-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/3696-13-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/3696-14-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/3696-15-0x0000000000610000-0x0000000000625000-memory.dmp

Filesize
84KB

Download
memory/4028-1-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4028-0-0x00000000004A0000-0x00000000004A1000-memory.dmp

Filesize
4KB

Download
memory/4028-2-0x00000000005D0000-0x00000000005D1000-memory.dmp

Filesize
4KB

Download
memory/4028-5-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads