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

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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe

Executes dropped EXE 1 IoCs

pid	Process
2156	obgtylem.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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\obgtylem.exe\""	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2156 set thread context of 924	2156	obgtylem.exe	83

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
3604	924	WerFault.exe	83

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

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2588 wrote to memory of 2156	2588	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	82
PID 2588 wrote to memory of 2156	2588	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	82
PID 2588 wrote to memory of 2156	2588	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	82
PID 2156 wrote to memory of 924	2156	obgtylem.exe	83
PID 2156 wrote to memory of 924	2156	obgtylem.exe	83
PID 2156 wrote to memory of 924	2156	obgtylem.exe	83
PID 2156 wrote to memory of 924	2156	obgtylem.exe	83
PID 2156 wrote to memory of 924	2156	obgtylem.exe	83
PID 2588 wrote to memory of 2044	2588	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	87
PID 2588 wrote to memory of 2044	2588	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	87
PID 2588 wrote to memory of 2044	2588	31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe	87

C:\Users\Admin\AppData\Local\Temp\31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe
"C:\Users\Admin\AppData\Local\Temp\31f4230adbbce38a80578c79102b0a1c0df240920d84f3335a4aab3fb6c6dc96.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2588
- C:\Users\Admin\obgtylem.exe
  "C:\Users\Admin\obgtylem.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2156
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:924
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 924 -s 368
      4⤵
      Program crash
      PID:3604
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\5843.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 924 -ip 924
1⤵
PID:2472

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\5843.bat

Filesize
302B

MD5
01e0793089b8c233818f94e2d18fcf0e

SHA1
1d4d0e444bf62e379f1e4bd30c4680bcfdc901ae

SHA256
aea8500238d35d4a545d641bd938e5ff83ac7dd7ee1840ad3af495fe572efb48

SHA512
c0b45203c66d3d88ea2dcfcdb109e63271fac1482aeada560cb31237cd176115efe9323fa7727b20cd857c156537b3c19b44e484674d990c48971a846a0c1fb6

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

Filesize
43.7MB

MD5
787f1be56d3bfd12596496211ce71d08

SHA1
fcb9aa61783a4571e07075e2e2548bfce5a22bb2

SHA256
3bdcd8613a93bd6a939eb7b56f5465aa20aeee94cec437aeea9f9ce7ba7c0f68

SHA512
e87ed785b60dd478313c079fd06f993024821159cb2d556edc134e43d5fad4c647dddc635cef7cacf1d0a4899f4ba7b3c7d46cf9d33ec0aeba09a18817d677d9

Download Submit
memory/924-14-0x0000000001280000-0x0000000001292000-memory.dmp

Filesize
72KB

Download
memory/924-9-0x0000000001280000-0x0000000001292000-memory.dmp

Filesize
72KB

Download
memory/924-17-0x0000000001280000-0x0000000001292000-memory.dmp

Filesize
72KB

Download
memory/924-26-0x0000000003210000-0x0000000003211000-memory.dmp

Filesize
4KB

Download
memory/924-27-0x0000000001280000-0x0000000001292000-memory.dmp

Filesize
72KB

Download
memory/924-28-0x0000000001280000-0x0000000001292000-memory.dmp

Filesize
72KB

Download
memory/2156-10-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2156-8-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2156-7-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2588-0-0x00000000005E0000-0x00000000005F2000-memory.dmp

Filesize
72KB

Download
memory/2588-21-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2588-23-0x00000000005E0000-0x00000000005F2000-memory.dmp

Filesize
72KB

Download
memory/2588-1-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads