tofsee | 914014bdfa54711f0be7ff00b7438aa023468c87494e7ec207ae9f3e543f3d69

Analysis

max time kernel
147s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 14:29

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General

Target
f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe
Size 11.7MB
Sample240417-rtqj2sca36
SHA256 914014bdfa54711f0be7ff00b7438aa023468c87494e7ec207ae9f3e543f3d69
MD5 f5fc0244fac4d1134685531500b89a07
SHA1 5e378f0c50c6680eb17f41939ea0e2859a16cf46
SHA512 f1d3e9924913692e495c3268814202b6d6c6598cdbcde0b21f9b34f058a25ef744f8bc814bb7a2df1c73ea25a659e7a1ed2bd77b9be83742e0870875b334c769
SSDEEP 12288:TRXQK44fy611111111111111111111111111111111111111111111111111111H:TRx2
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
4600	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\brqxrmea\ImagePath = "C:\\Windows\\SysWOW64\\brqxrmea\\neahyxbf.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-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
3196	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
392	neahyxbf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 392 set thread context of 3196	392	neahyxbf.exe	141

Launches sc.exe 3 IoCs

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

pid	Process
2592	sc.exe
1460	sc.exe
836	sc.exe

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

System Information Discovery
T1082

Program crash 21 IoCs

pid	pid_target	Process	procid_target
2692	3592	WerFault.exe	81
4744	3592	WerFault.exe	81
3000	3592	WerFault.exe	81
3380	3592	WerFault.exe	81
4904	3592	WerFault.exe	81
1968	3592	WerFault.exe	81
3912	3592	WerFault.exe	81
2672	3592	WerFault.exe	81
2668	3592	WerFault.exe	81
1708	3592	WerFault.exe	81
1016	3592	WerFault.exe	81
1992	3592	WerFault.exe	81
3540	3592	WerFault.exe	81
1712	3592	WerFault.exe	81
1660	3592	WerFault.exe	81
4076	3592	WerFault.exe	81
3208	3592	WerFault.exe	81
3424	3592	WerFault.exe	81
1672	392	WerFault.exe	130
3928	392	WerFault.exe	130
1528	392	WerFault.exe	130

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3592 wrote to memory of 4124	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	102
PID 3592 wrote to memory of 4124	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	102
PID 3592 wrote to memory of 4124	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	102
PID 3592 wrote to memory of 1740	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	108
PID 3592 wrote to memory of 1740	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	108
PID 3592 wrote to memory of 1740	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	108
PID 3592 wrote to memory of 1460	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	114
PID 3592 wrote to memory of 1460	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	114
PID 3592 wrote to memory of 1460	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	114
PID 3592 wrote to memory of 836	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	120
PID 3592 wrote to memory of 836	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	120
PID 3592 wrote to memory of 836	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	120
PID 3592 wrote to memory of 2592	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	126
PID 3592 wrote to memory of 2592	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	126
PID 3592 wrote to memory of 2592	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	126
PID 3592 wrote to memory of 4600	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	133
PID 3592 wrote to memory of 4600	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	133
PID 3592 wrote to memory of 4600	3592	f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe	133
PID 392 wrote to memory of 3196	392	neahyxbf.exe	141
PID 392 wrote to memory of 3196	392	neahyxbf.exe	141
PID 392 wrote to memory of 3196	392	neahyxbf.exe	141
PID 392 wrote to memory of 3196	392	neahyxbf.exe	141
PID 392 wrote to memory of 3196	392	neahyxbf.exe	141

C:\Users\Admin\AppData\Local\Temp\f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3592
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 588
  2⤵
  - Program crash
  PID:2692
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 688
  2⤵
  - Program crash
  PID:4744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 724
  2⤵
  - Program crash
  PID:3000
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 956
  2⤵
  - Program crash
  PID:3380
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 732
  2⤵
  - Program crash
  PID:4904
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 732
  2⤵
  - Program crash
  PID:1968
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 1004
  2⤵
  - Program crash
  PID:3912
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\brqxrmea\
  2⤵
  PID:4124
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 896
  2⤵
  - Program crash
  PID:2672
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 580
  2⤵
  - Program crash
  PID:2668
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\neahyxbf.exe" C:\Windows\SysWOW64\brqxrmea\
  2⤵
  PID:1740
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 804
  2⤵
  - Program crash
  PID:1708
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 1208
  2⤵
  - Program crash
  PID:1016
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create brqxrmea binPath= "C:\Windows\SysWOW64\brqxrmea\neahyxbf.exe /d\"C:\Users\Admin\AppData\Local\Temp\f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1460
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 656
  2⤵
  - Program crash
  PID:1992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 640
  2⤵
  - Program crash
  PID:3540
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description brqxrmea "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:836
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 1104
  2⤵
  - Program crash
  PID:1712
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 668
  2⤵
  - Program crash
  PID:1660
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start brqxrmea
  2⤵
  - Launches sc.exe
  PID:2592
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 656
  2⤵
  - Program crash
  PID:4076
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 1192
  2⤵
  - Program crash
  PID:3208
- 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:4600
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 1104
  2⤵
  - Program crash
  PID:3424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3592 -ip 3592
1⤵
PID:3196

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3592 -ip 3592
1⤵
PID:2300

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3592 -ip 3592
1⤵
PID:4436

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3592 -ip 3592
1⤵
PID:1192

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 3592 -ip 3592
1⤵
PID:4424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3592 -ip 3592
1⤵
PID:4336

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3592 -ip 3592
1⤵
PID:60

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 3592 -ip 3592
1⤵
PID:416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 3592 -ip 3592
1⤵
PID:3180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 3592 -ip 3592
1⤵
PID:3416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 3592 -ip 3592
1⤵
PID:2032

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 3592 -ip 3592
1⤵
PID:2500

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 3592 -ip 3592
1⤵
PID:1832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 3592 -ip 3592
1⤵
PID:3168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 592 -p 3592 -ip 3592
1⤵
PID:3212

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 3592 -ip 3592
1⤵
PID:532

C:\Windows\SysWOW64\brqxrmea\neahyxbf.exe
C:\Windows\SysWOW64\brqxrmea\neahyxbf.exe /d"C:\Users\Admin\AppData\Local\Temp\f5fc0244fac4d1134685531500b89a07_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:392
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 392 -s 524
  2⤵
  - Program crash
  PID:1672
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3196
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 392 -s 532
  2⤵
  - Program crash
  PID:3928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 392 -s 552
  2⤵
  - Program crash
  PID:1528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3592 -ip 3592
1⤵
PID:1960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3592 -ip 3592
1⤵
PID:4940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 392 -ip 392
1⤵
PID:3940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 392 -ip 392
1⤵
PID:2692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 392 -ip 392
1⤵
PID:4512

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

neahyxbf.exe

Path C:\Users\Admin\AppData\Local\Temp\neahyxbf.exe
Size 13.3MB
SHA256 c08f52caa27e74e36656b9f642da8bbcbab7b10906c5972d9cb3e9229d6d7df2
MD5 a3c35e1bc6726c7f20e27878b504e1ae
SHA1 4f945f388432f9624eadd1be94dea6f11f8edd92
SHA512 4693a0719a01f0b5fb3b3af933f027af745058e949dd05e8b7521624f1f82cb12ef9fe0fd8191c98754abe05b3d77b0fef71e5485ca958f1656804cacfc6a895
SSDEEP 12288:IRXQK44fy611111111111111111111111111111111111111111111111111111H:IRx2
MD5 SHA1 SHA512 SSDEEP

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memory/392-11-0x0000000000400000-0x0000000003359000-memory.dmp

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memory/392-19-0x0000000000400000-0x0000000003359000-memory.dmp

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memory/392-12-0x0000000003390000-0x0000000003490000-memory.dmp

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memory/3196-13-0x00000000003B0000-0x00000000003C5000-memory.dmp

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memory/3196-16-0x00000000003B0000-0x00000000003C5000-memory.dmp

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memory/3196-17-0x00000000003B0000-0x00000000003C5000-memory.dmp

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memory/3196-18-0x00000000003B0000-0x00000000003C5000-memory.dmp

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memory/3196-20-0x00000000003B0000-0x00000000003C5000-memory.dmp

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memory/3592-8-0x0000000000400000-0x0000000003359000-memory.dmp

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memory/3592-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/3592-6-0x0000000000400000-0x0000000003359000-memory.dmp

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memory/3592-4-0x0000000000400000-0x0000000003359000-memory.dmp

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memory/3592-1-0x0000000003680000-0x0000000003780000-memory.dmp

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memory/3592-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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