tofsee | f9184e1c98e13ad7ac25e5fdcf56bb27988775d2a9be11df778ae7b9639ce083

Analysis

max time kernel
148s
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
29/03/2024, 22:17

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General

Target
2e31becd6f048e88711a289110b41021_JaffaCakes118.exe
Size 10.0MB
Sample240329-17js4abh97
SHA256 f9184e1c98e13ad7ac25e5fdcf56bb27988775d2a9be11df778ae7b9639ce083
MD5 2e31becd6f048e88711a289110b41021
SHA1 167fde1d6dfef1f02c8ab9d5e1abb9c7c8188acf
SHA512 cbea83dd37619d954cb7a7825c97e70bf488d802622be355d56c0680c2c71b214ad23a4eca4c46ed22dd60998c4026e66556e59b40589524eabb165696da151a
SSDEEP 98304:SEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE0:
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
3324	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\qlajxece\ImagePath = "C:\\Windows\\SysWOW64\\qlajxece\\mytqxwwk.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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3600	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2548	mytqxwwk.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2548 set thread context of 3600	2548	mytqxwwk.exe	109

Launches sc.exe 3 IoCs

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

pid	Process
3368	sc.exe
4820	sc.exe
1184	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
3148	4360	WerFault.exe	85
4564	2548	WerFault.exe	103

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4360 wrote to memory of 384	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	90
PID 4360 wrote to memory of 384	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	90
PID 4360 wrote to memory of 384	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	90
PID 4360 wrote to memory of 5040	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	93
PID 4360 wrote to memory of 5040	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	93
PID 4360 wrote to memory of 5040	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	93
PID 4360 wrote to memory of 1184	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	95
PID 4360 wrote to memory of 1184	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	95
PID 4360 wrote to memory of 1184	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	95
PID 4360 wrote to memory of 3368	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	99
PID 4360 wrote to memory of 3368	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	99
PID 4360 wrote to memory of 3368	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	99
PID 4360 wrote to memory of 4820	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	101
PID 4360 wrote to memory of 4820	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	101
PID 4360 wrote to memory of 4820	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	101
PID 4360 wrote to memory of 3324	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	104
PID 4360 wrote to memory of 3324	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	104
PID 4360 wrote to memory of 3324	4360	2e31becd6f048e88711a289110b41021_JaffaCakes118.exe	104
PID 2548 wrote to memory of 3600	2548	mytqxwwk.exe	109
PID 2548 wrote to memory of 3600	2548	mytqxwwk.exe	109
PID 2548 wrote to memory of 3600	2548	mytqxwwk.exe	109
PID 2548 wrote to memory of 3600	2548	mytqxwwk.exe	109
PID 2548 wrote to memory of 3600	2548	mytqxwwk.exe	109

C:\Users\Admin\AppData\Local\Temp\2e31becd6f048e88711a289110b41021_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2e31becd6f048e88711a289110b41021_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qlajxece\
  2⤵
  PID:384
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mytqxwwk.exe" C:\Windows\SysWOW64\qlajxece\
  2⤵
  PID:5040
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create qlajxece binPath= "C:\Windows\SysWOW64\qlajxece\mytqxwwk.exe /d\"C:\Users\Admin\AppData\Local\Temp\2e31becd6f048e88711a289110b41021_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1184
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description qlajxece "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:3368
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start qlajxece
  2⤵
  - Launches sc.exe
  PID:4820
- 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:3324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4360 -s 1032
  2⤵
  - Program crash
  PID:3148

C:\Windows\SysWOW64\qlajxece\mytqxwwk.exe
C:\Windows\SysWOW64\qlajxece\mytqxwwk.exe /d"C:\Users\Admin\AppData\Local\Temp\2e31becd6f048e88711a289110b41021_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2548
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3600
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2548 -s 512
  2⤵
  - Program crash
  PID:4564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4360 -ip 4360
1⤵
PID:2648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2548 -ip 2548
1⤵
PID:2928

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

mytqxwwk.exe

Path C:\Users\Admin\AppData\Local\Temp\mytqxwwk.exe
Size 11.4MB
SHA256 40bd1e15882ebbf0dd44e9f380fe152c4e630015aaf6d9e9a991a29f55e2d6f5
MD5 96bd9f4cda68d08c607bbc08e47234e2
SHA1 943256ce1bb53de4e56ca2b68498d5a9b25ea8a3
SHA512 afc47f1c6326fc6dae9d559ec40e9a7a424918a3a7a6c8a9dd6b37f18437197b6d4df20d00b6d1083a3aec67b919177de3d449887393182a920b2a8f2af66c78
SSDEEP 98304:EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEn:
MD5 SHA1 SHA512 SSDEEP

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memory/2548-10-0x00000000006C0000-0x00000000007C0000-memory.dmp

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memory/2548-11-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/2548-18-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/3600-12-0x0000000000450000-0x0000000000465000-memory.dmp

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memory/3600-16-0x0000000000450000-0x0000000000465000-memory.dmp

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memory/3600-15-0x0000000000450000-0x0000000000465000-memory.dmp

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memory/3600-17-0x0000000000450000-0x0000000000465000-memory.dmp

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memory/3600-19-0x0000000000450000-0x0000000000465000-memory.dmp

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memory/4360-4-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/4360-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4360-8-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/4360-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4360-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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