tofsee | 31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96

General

Target

31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe
Size

94KB
MD5

dc6a56c47497bf22da1da256075b2b96
SHA1

9a4bbe3919610a967d4d58753c3c8750f849e20f
SHA256

31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96
SHA512

f2019729557b4cd03e6653a72f8e9bf4e53fafa662224af84478d3e8d7268cddd3b476c4ce61221b23d249b451b874f52225a0a289835b5307e0751a161acd39
SSDEEP

1536:HaT5HC7L9vnEexvevA17dfTWmU6WmQt8upcr/dF:HaT5aLaexbditRtsrFF

Score

10^/10

tofsee discovery persistence trojan

Malware Config

Extracted

Family

tofsee

C2

91.218.38.211

188.130.237.71

185.25.48.10

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

Deletes itself 1 IoCs

pid	Process
2808	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2080	kxcpuhai.exe

Loads dropped DLL 2 IoCs

pid	Process
1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe
1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\kxcpuhai.exe\""	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2080 set thread context of 2104	2080	kxcpuhai.exe	31

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

System Information Discovery
T1082

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kxcpuhai.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe
2080	kxcpuhai.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1560 wrote to memory of 2080	1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	30
PID 1560 wrote to memory of 2080	1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	30
PID 1560 wrote to memory of 2080	1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	30
PID 1560 wrote to memory of 2080	1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	30
PID 2080 wrote to memory of 2104	2080	kxcpuhai.exe	31
PID 2080 wrote to memory of 2104	2080	kxcpuhai.exe	31
PID 2080 wrote to memory of 2104	2080	kxcpuhai.exe	31
PID 2080 wrote to memory of 2104	2080	kxcpuhai.exe	31
PID 2080 wrote to memory of 2104	2080	kxcpuhai.exe	31
PID 2080 wrote to memory of 2104	2080	kxcpuhai.exe	31
PID 1560 wrote to memory of 2808	1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	32
PID 1560 wrote to memory of 2808	1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	32
PID 1560 wrote to memory of 2808	1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	32
PID 1560 wrote to memory of 2808	1560	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	32

C:\Users\Admin\AppData\Local\Temp\31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe
"C:\Users\Admin\AppData\Local\Temp\31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1560
- C:\Users\Admin\kxcpuhai.exe
  "C:\Users\Admin\kxcpuhai.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of UnmapMainImage
  - Suspicious use of WriteProcessMemory
  PID:2080
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2104
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\1376.bat" "
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2808

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

System Information Discovery

1

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\1376.bat

Filesize
302B

MD5
01e0793089b8c233818f94e2d18fcf0e

SHA1
1d4d0e444bf62e379f1e4bd30c4680bcfdc901ae

SHA256
aea8500238d35d4a545d641bd938e5ff83ac7dd7ee1840ad3af495fe572efb48

SHA512
c0b45203c66d3d88ea2dcfcdb109e63271fac1482aeada560cb31237cd176115efe9323fa7727b20cd857c156537b3c19b44e484674d990c48971a846a0c1fb6

Download Submit
\Users\Admin\kxcpuhai.exe

Filesize
49.5MB

MD5
5a2ead4136fbf18fe69f40cbad35d050

SHA1
fc4cc7dd5b078528ec91edd0ce2d26c37544fda5

SHA256
12d66f4d26de74770ceb96e2ae815a2789e942425b47cca02225740b18f0f1ea

SHA512
ba6e4f5dbdd571d21ef93cb7374170ba88d3a6b2abc867566d831b7c53e87bbff0b2fd9517c5eee539ee7dd8dfa55e0c53f06613ac38b6af4441c8280376c5ce

Download Submit
memory/1560-1-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1560-36-0x0000000000240000-0x0000000000252000-memory.dmp

Filesize
72KB

Download
memory/1560-37-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1560-0-0x0000000000240000-0x0000000000252000-memory.dmp

Filesize
72KB

Download
memory/2080-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2080-12-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2080-11-0x0000000000240000-0x0000000000252000-memory.dmp

Filesize
72KB

Download
memory/2104-23-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2104-22-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2104-16-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2104-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2104-27-0x0000000000190000-0x0000000000191000-memory.dmp

Filesize
4KB

Download
memory/2104-13-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2104-39-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2104-41-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads