tofsee | e46edab1478c55992acc8490b60ae5fba16155c3ba738641f2618247314535d0

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
14/04/2024, 19:28

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General

Target
ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe
Size 12.9MB
Sample240414-x63m2aed5s
SHA256 e46edab1478c55992acc8490b60ae5fba16155c3ba738641f2618247314535d0
MD5 ef548e7c9e1effbea1d8347984974dfa
SHA1 0766d1b260c116b2489fec43673b1d6e50a22139
SHA512 69f1c10cd855eb02407b15f4033855cd03475477974b1b5ced7c5751a537aa71f90e52c78b40c21e297e20c5a4f91738ba57a5029d4f632cf78724dc3540b3c5
SSDEEP 49152:UQsPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPn:UQ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

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

pid	Process
1188	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\lpztkiva\ImagePath = "C:\\Windows\\SysWOW64\\lpztkiva\\avczyvrs.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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2868	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2280	avczyvrs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2280 set thread context of 2868	2280	avczyvrs.exe	104

Launches sc.exe 3 IoCs

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

pid	Process
2820	sc.exe
3880	sc.exe
4488	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1204 wrote to memory of 3104	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	88
PID 1204 wrote to memory of 3104	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	88
PID 1204 wrote to memory of 3104	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	88
PID 1204 wrote to memory of 2400	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	91
PID 1204 wrote to memory of 2400	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	91
PID 1204 wrote to memory of 2400	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	91
PID 1204 wrote to memory of 3880	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	93
PID 1204 wrote to memory of 3880	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	93
PID 1204 wrote to memory of 3880	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	93
PID 1204 wrote to memory of 4488	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	95
PID 1204 wrote to memory of 4488	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	95
PID 1204 wrote to memory of 4488	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	95
PID 1204 wrote to memory of 2820	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	98
PID 1204 wrote to memory of 2820	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	98
PID 1204 wrote to memory of 2820	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	98
PID 1204 wrote to memory of 1188	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	102
PID 1204 wrote to memory of 1188	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	102
PID 1204 wrote to memory of 1188	1204	ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe	102
PID 2280 wrote to memory of 2868	2280	avczyvrs.exe	104
PID 2280 wrote to memory of 2868	2280	avczyvrs.exe	104
PID 2280 wrote to memory of 2868	2280	avczyvrs.exe	104
PID 2280 wrote to memory of 2868	2280	avczyvrs.exe	104
PID 2280 wrote to memory of 2868	2280	avczyvrs.exe	104

C:\Users\Admin\AppData\Local\Temp\ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lpztkiva\
  2⤵
  PID:3104
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\avczyvrs.exe" C:\Windows\SysWOW64\lpztkiva\
  2⤵
  PID:2400
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create lpztkiva binPath= "C:\Windows\SysWOW64\lpztkiva\avczyvrs.exe /d\"C:\Users\Admin\AppData\Local\Temp\ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3880
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description lpztkiva "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4488
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start lpztkiva
  2⤵
  - Launches sc.exe
  PID:2820
- 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:1188

C:\Windows\SysWOW64\lpztkiva\avczyvrs.exe
C:\Windows\SysWOW64\lpztkiva\avczyvrs.exe /d"C:\Users\Admin\AppData\Local\Temp\ef548e7c9e1effbea1d8347984974dfa_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2868

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

avczyvrs.exe

Path C:\Users\Admin\AppData\Local\Temp\avczyvrs.exe
Size 14.8MB
SHA256 a89b241888c680cfc6d81452047b8b121a73d1e02b403f9a67b674b7bf6283c2
MD5 56f30e5a0cd131ef3f1155972675acaa
SHA1 121fa8e0ff81a8bd8370b9d5aa2f0a2b62635b17
SHA512 e411ffe18405185eb2598fa0169525310ffda8972ed5ce66d0c89053dc0b736bcce16bbf32c36d415ccbce8c04465cc33460facaaa93f671eda6e1f9bd98e4f7
SSDEEP 49152:9QsPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPn:9Q
MD5 SHA1 SHA512 SSDEEP

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memory/1204-8-0x0000000000400000-0x0000000000C56000-memory.dmp

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memory/1204-2-0x0000000000D80000-0x0000000000E80000-memory.dmp

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memory/1204-4-0x0000000000400000-0x0000000000C56000-memory.dmp

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memory/1204-0-0x0000000000400000-0x0000000000C56000-memory.dmp

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memory/2280-13-0x0000000000400000-0x0000000000C56000-memory.dmp

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memory/2280-7-0x0000000000400000-0x0000000000C56000-memory.dmp

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memory/2280-12-0x0000000000400000-0x0000000000C56000-memory.dmp

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memory/2280-10-0x0000000000F60000-0x0000000001060000-memory.dmp

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memory/2868-11-0x00000000007B0000-0x00000000007C5000-memory.dmp

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memory/2868-16-0x00000000007B0000-0x00000000007C5000-memory.dmp

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memory/2868-17-0x00000000007B0000-0x00000000007C5000-memory.dmp

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memory/2868-18-0x00000000007B0000-0x00000000007C5000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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