tofsee | 0679a918d7d020d9487e309fbcf8e55c997f405530f92256b6de7d3ae27eb0b7

Analysis

max time kernel
147s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2024, 11:38

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General

Target
ddeb056ae1107f54f787111be1f88041.exe
Size 12.1MB
Sample240325-nr6ayaed94
SHA256 0679a918d7d020d9487e309fbcf8e55c997f405530f92256b6de7d3ae27eb0b7
MD5 ddeb056ae1107f54f787111be1f88041
SHA1 e423feb2f9ab5312ccc4a4ab6cee6997f1c86c03
SHA512 d4ddc7fc8df98e218a483b231bf7a57d58a10718381b6d6c4af9a27bd7967874cc2fcba8ef5a8621efcc72e78bc1ca3a4b496ba0db896c9ecc178ac4a9cd0ed6
SSDEEP 24576:Igdy5yNM4444444444444444444444444444444444444444444444444444444v:
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

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

pid	Process
3088	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\hzhyimee\ImagePath = "C:\\Windows\\SysWOW64\\hzhyimee\\gbqafkca.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	ddeb056ae1107f54f787111be1f88041.exe

Deletes itself 1 IoCs

pid	Process
2308	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3280	gbqafkca.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3280 set thread context of 2308	3280	gbqafkca.exe	108

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3836	sc.exe
4228	sc.exe
3520	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

pid	pid_target	Process	procid_target
2060	2672	WerFault.exe	86
3504	3280	WerFault.exe	100

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 2556	2672	ddeb056ae1107f54f787111be1f88041.exe	90
PID 2672 wrote to memory of 2556	2672	ddeb056ae1107f54f787111be1f88041.exe	90
PID 2672 wrote to memory of 2556	2672	ddeb056ae1107f54f787111be1f88041.exe	90
PID 2672 wrote to memory of 4476	2672	ddeb056ae1107f54f787111be1f88041.exe	92
PID 2672 wrote to memory of 4476	2672	ddeb056ae1107f54f787111be1f88041.exe	92
PID 2672 wrote to memory of 4476	2672	ddeb056ae1107f54f787111be1f88041.exe	92
PID 2672 wrote to memory of 3836	2672	ddeb056ae1107f54f787111be1f88041.exe	94
PID 2672 wrote to memory of 3836	2672	ddeb056ae1107f54f787111be1f88041.exe	94
PID 2672 wrote to memory of 3836	2672	ddeb056ae1107f54f787111be1f88041.exe	94
PID 2672 wrote to memory of 4228	2672	ddeb056ae1107f54f787111be1f88041.exe	96
PID 2672 wrote to memory of 4228	2672	ddeb056ae1107f54f787111be1f88041.exe	96
PID 2672 wrote to memory of 4228	2672	ddeb056ae1107f54f787111be1f88041.exe	96
PID 2672 wrote to memory of 3520	2672	ddeb056ae1107f54f787111be1f88041.exe	98
PID 2672 wrote to memory of 3520	2672	ddeb056ae1107f54f787111be1f88041.exe	98
PID 2672 wrote to memory of 3520	2672	ddeb056ae1107f54f787111be1f88041.exe	98
PID 2672 wrote to memory of 3088	2672	ddeb056ae1107f54f787111be1f88041.exe	101
PID 2672 wrote to memory of 3088	2672	ddeb056ae1107f54f787111be1f88041.exe	101
PID 2672 wrote to memory of 3088	2672	ddeb056ae1107f54f787111be1f88041.exe	101
PID 3280 wrote to memory of 2308	3280	gbqafkca.exe	108
PID 3280 wrote to memory of 2308	3280	gbqafkca.exe	108
PID 3280 wrote to memory of 2308	3280	gbqafkca.exe	108
PID 3280 wrote to memory of 2308	3280	gbqafkca.exe	108
PID 3280 wrote to memory of 2308	3280	gbqafkca.exe	108

C:\Users\Admin\AppData\Local\Temp\ddeb056ae1107f54f787111be1f88041.exe
"C:\Users\Admin\AppData\Local\Temp\ddeb056ae1107f54f787111be1f88041.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hzhyimee\
  2⤵
  PID:2556
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gbqafkca.exe" C:\Windows\SysWOW64\hzhyimee\
  2⤵
  PID:4476
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create hzhyimee binPath= "C:\Windows\SysWOW64\hzhyimee\gbqafkca.exe /d\"C:\Users\Admin\AppData\Local\Temp\ddeb056ae1107f54f787111be1f88041.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3836
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description hzhyimee "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4228
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start hzhyimee
  2⤵
  - Launches sc.exe
  PID:3520
- 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:3088
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2672 -s 1232
  2⤵
  - Program crash
  PID:2060

C:\Windows\SysWOW64\hzhyimee\gbqafkca.exe
C:\Windows\SysWOW64\hzhyimee\gbqafkca.exe /d"C:\Users\Admin\AppData\Local\Temp\ddeb056ae1107f54f787111be1f88041.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3280
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2308
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3280 -s 520
  2⤵
  - Program crash
  PID:3504

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2672 -ip 2672
1⤵
PID:4444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3280 -ip 3280
1⤵
PID:3156

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

gbqafkca.exe

Path C:\Users\Admin\AppData\Local\Temp\gbqafkca.exe
Size 14.7MB
SHA256 39177e8c1255444d714f716028f324d346c3f9ce13e99554ef9a56a9094bdf58
MD5 5d1470caf0cf10f682be43586f909f62
SHA1 8b8e686d21ff3277ce86d9b5f9475eff108875ff
SHA512 c265fee6d74bfaaacd05f790e2f6863362be0f112b2d6deb58803502500a536b5b6ef24b90b8d30732acb4f3f635c69d1ea38282d900d7422cf7b6f1c6e4d174
SSDEEP 24576:Pgdy5yNM4444444444444444444444444444444444444444444444444444444g:
MD5 SHA1 SHA512 SSDEEP

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memory/2308-15-0x0000000001230000-0x0000000001245000-memory.dmp

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memory/2308-11-0x0000000001230000-0x0000000001245000-memory.dmp

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memory/2308-16-0x0000000001230000-0x0000000001245000-memory.dmp

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memory/2308-17-0x0000000001230000-0x0000000001245000-memory.dmp

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memory/2308-19-0x0000000001230000-0x0000000001245000-memory.dmp

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memory/2672-3-0x0000000000400000-0x0000000000456000-memory.dmp

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memory/2672-2-0x00000000005F0000-0x0000000000603000-memory.dmp

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memory/2672-8-0x0000000000400000-0x0000000000456000-memory.dmp

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memory/2672-9-0x00000000005F0000-0x0000000000603000-memory.dmp

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memory/2672-1-0x0000000000810000-0x0000000000910000-memory.dmp

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memory/3280-10-0x00000000005D0000-0x00000000006D0000-memory.dmp

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memory/3280-12-0x0000000000400000-0x0000000000456000-memory.dmp

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memory/3280-18-0x0000000000400000-0x0000000000456000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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