tofsee | 086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790f

General

Target

086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe
Size

144KB
MD5

79e36707abf82183a03e9d8dda3b3430
SHA1

d986b8ba3ed36333f127b34842fc991713c4f5ac
SHA256

086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790f
SHA512

26f0b48f09193014bd9fc5f1ede8df23979e4791ae47e6d4395656fa62d22a32435f43aba15e3f32facb4fdc24f2ed97305bebf1eb53bc5033bae82710e88b4d
SSDEEP

3072:uaVP6HaGT5SR8fGzIpYDx1cTqO9lkS2jbxWGqSV3:uaGoEpWxSbGqSV3

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

C2

91.218.39.211

188.130.237.44

91.204.162.103

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
Tofsee family
tofsee

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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe

Executes dropped EXE 1 IoCs

pid	Process
1400	efxvvphu.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\efxvvphu.exe\""	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1400 set thread context of 4672	1400	efxvvphu.exe	86

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
868	4672	WerFault.exe	86

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	efxvvphu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 1400	2764	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe	84
PID 2764 wrote to memory of 1400	2764	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe	84
PID 2764 wrote to memory of 1400	2764	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe	84
PID 1400 wrote to memory of 4672	1400	efxvvphu.exe	86
PID 1400 wrote to memory of 4672	1400	efxvvphu.exe	86
PID 1400 wrote to memory of 4672	1400	efxvvphu.exe	86
PID 1400 wrote to memory of 4672	1400	efxvvphu.exe	86
PID 1400 wrote to memory of 4672	1400	efxvvphu.exe	86
PID 2764 wrote to memory of 4124	2764	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe	91
PID 2764 wrote to memory of 4124	2764	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe	91
PID 2764 wrote to memory of 4124	2764	086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe	91

C:\Users\Admin\AppData\Local\Temp\086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe
"C:\Users\Admin\AppData\Local\Temp\086d569820100e59cb3709bb6c5ea5b1026861c52ff05c7d9afad992885f790fN.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Users\Admin\efxvvphu.exe
  "C:\Users\Admin\efxvvphu.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1400
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4672
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4672 -s 360
      4⤵
      Program crash
      PID:868
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\0368.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4124

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4672 -ip 4672
1⤵
PID:1532

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\0368.bat

Filesize
304B

MD5
260fe91b48cd9bdd9eb9a3677f18f128

SHA1
2f7334722de5e25d81de5be4fadc98ef92dadca2

SHA256
f30ed516ce5be9cdfe1e84c78d3e5c600ec50d0458ba0f0bf72f7f21de3da549

SHA512
55687dc48f7a889652472e797571ef31eb51269fe3441c3046a005b326d2dadba274c677de2b0496aabd76df5a0d6dd395efef4990ec9650a548612d61668bd9

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

Filesize
46.6MB

MD5
8e52897086626ccc804e6e35799ba637

SHA1
9587371fc0238858dbc4118a30bd03d4302390a9

SHA256
dd3d0118992e80ee4bde16e012d0494122c84da392e56cab3c3ad998d4c87f7c

SHA512
05fab1c53a88c92b4190d1dc6d762211eb66e7f7384ddf20c9c1d6356f3760903c983f06ef55dc9b7a462bb38f178b53d4e8c0ddc19f04efcba38c408d15af9a

Download Submit
memory/1400-10-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1400-8-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1400-7-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/2764-0-0x00000000021A0000-0x00000000021B2000-memory.dmp

Filesize
72KB

Download
memory/2764-21-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2764-23-0x00000000021A0000-0x00000000021B2000-memory.dmp

Filesize
72KB

Download
memory/2764-1-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4672-13-0x0000000000CB0000-0x0000000000CC2000-memory.dmp

Filesize
72KB

Download
memory/4672-17-0x0000000000CB0000-0x0000000000CC2000-memory.dmp

Filesize
72KB

Download
memory/4672-9-0x0000000000CB0000-0x0000000000CC2000-memory.dmp

Filesize
72KB

Download
memory/4672-26-0x0000000002E40000-0x0000000002E41000-memory.dmp

Filesize
4KB

Download
memory/4672-27-0x0000000000CB0000-0x0000000000CC2000-memory.dmp

Filesize
72KB

Download
memory/4672-28-0x0000000000CB0000-0x0000000000CC2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads