tofsee | 48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8

Analysis

max time kernel
152s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
25/11/2022, 21:25

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General

Target

48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe
Size

78KB
MD5

bc1883b07b47423bd30645e54db4775c
SHA1

2b96b8027083c5c44189ac03bafcc71df82a8ee1
SHA256

48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8
SHA512

6185931b4a06cd38dfaaecd4a60160bf7b07fa9bec3a1a2da0a1bbcda5ad7cf7f78b1a55810e065a1c6f29c7b5bbd64d584172e3d7386f6195ba1c8b4b28a85e
SSDEEP

1536:Kgzoa0BgdObHOjEb+96omECPxuXfDZEEkU3rHt81Hqf:Lzoa0yQnOhmEHCEkgry1H

Score

10^/10

tofsee persistence trojan

Malware Config

Extracted

Family

tofsee

185.4.227.76

188.165.132.183

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Executes dropped EXE 2 IoCs

pid	Process
4768	wwfeqcpr.exe
5004	wwfeqcpr.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\wwfeqcpr.exe\""	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4364 set thread context of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4768 set thread context of 5004	4768	wwfeqcpr.exe	80
PID 5004 set thread context of 4920	5004	wwfeqcpr.exe	81

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2028	4920	WerFault.exe	81

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 4364 wrote to memory of 3672	4364	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	78
PID 3672 wrote to memory of 4768	3672	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	79
PID 3672 wrote to memory of 4768	3672	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	79
PID 3672 wrote to memory of 4768	3672	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	79
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 4768 wrote to memory of 5004	4768	wwfeqcpr.exe	80
PID 5004 wrote to memory of 4920	5004	wwfeqcpr.exe	81
PID 5004 wrote to memory of 4920	5004	wwfeqcpr.exe	81
PID 5004 wrote to memory of 4920	5004	wwfeqcpr.exe	81
PID 5004 wrote to memory of 4920	5004	wwfeqcpr.exe	81
PID 5004 wrote to memory of 4920	5004	wwfeqcpr.exe	81
PID 3672 wrote to memory of 2468	3672	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	85
PID 3672 wrote to memory of 2468	3672	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	85
PID 3672 wrote to memory of 2468	3672	48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe	85

C:\Users\Admin\AppData\Local\Temp\48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe
"C:\Users\Admin\AppData\Local\Temp\48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4364
- C:\Users\Admin\AppData\Local\Temp\48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe
  "C:\Users\Admin\AppData\Local\Temp\48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:3672
- - C:\Users\Admin\wwfeqcpr.exe
    "C:\Users\Admin\wwfeqcpr.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4768
  - - C:\Users\Admin\wwfeqcpr.exe
      "C:\Users\Admin\wwfeqcpr.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:5004
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        
        PID:4920
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4920 -s 192
        6⤵
        Program crash
        
        PID:2028
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\3637.bat" "
    3⤵
    PID:2468

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 176 -p 4920 -ip 4920
1⤵
PID:4628

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

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

C:\Users\Admin\AppData\Local\Temp\3637.bat

Filesize
302B

MD5
bb034c8d8aa382466cf0e6587b229702

SHA1
d67b347b02eca51be13e0a6e09eedf4702f1933c

SHA256
eb42f40d7110c83317e5dcdaaa3694fd18619bbda0e0db28f03bb06240b5403b

SHA512
a8637d88052fdc154cc0b2be2486f6ac9de1f2a116d2dfe4604475f06f8f77dc9d1ac4b7539100b505b58115ea8da98a561f5fcacd72096f510d208425106283

Download Submit
C:\Users\Admin\wwfeqcpr.exe

Filesize
78KB

MD5
bc1883b07b47423bd30645e54db4775c

SHA1
2b96b8027083c5c44189ac03bafcc71df82a8ee1

SHA256
48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8

SHA512
6185931b4a06cd38dfaaecd4a60160bf7b07fa9bec3a1a2da0a1bbcda5ad7cf7f78b1a55810e065a1c6f29c7b5bbd64d584172e3d7386f6195ba1c8b4b28a85e

Download Submit
C:\Users\Admin\wwfeqcpr.exe

Filesize
78KB

MD5
bc1883b07b47423bd30645e54db4775c

SHA1
2b96b8027083c5c44189ac03bafcc71df82a8ee1

SHA256
48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8

SHA512
6185931b4a06cd38dfaaecd4a60160bf7b07fa9bec3a1a2da0a1bbcda5ad7cf7f78b1a55810e065a1c6f29c7b5bbd64d584172e3d7386f6195ba1c8b4b28a85e

Download Submit
C:\Users\Admin\wwfeqcpr.exe

Filesize
78KB

MD5
bc1883b07b47423bd30645e54db4775c

SHA1
2b96b8027083c5c44189ac03bafcc71df82a8ee1

SHA256
48c2b90f3474f4d286de08c54b114428b3d73497c0878b9a6185be07489d45d8

SHA512
6185931b4a06cd38dfaaecd4a60160bf7b07fa9bec3a1a2da0a1bbcda5ad7cf7f78b1a55810e065a1c6f29c7b5bbd64d584172e3d7386f6195ba1c8b4b28a85e

Download Submit
memory/3672-137-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3672-141-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3672-134-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4364-132-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/4364-136-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/4768-142-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/4768-146-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/4920-150-0x0000000000470000-0x0000000000481000-memory.dmp

Filesize
68KB

Download
memory/4920-155-0x0000000000470000-0x0000000000481000-memory.dmp

Filesize
68KB

Download