tofsee | b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97

Analysis

max time kernel
146s
max time network
154s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
01/10/2022, 20:50

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General

Target

b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe
Size

120KB
MD5

4dceae07630380b5ed1a94389e1fb9c0
SHA1

2d3bd982d62d7fc62b961f82625682231766856e
SHA256

b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97
SHA512

4fb8b0a3cbeb394453c551e6daece1cf5c1685abf2d6b083d569c4096a3544c228df7bba7acfdec3aae9caa490f04dd78ca08a53cf6a6108f415a0d5a767e254
SSDEEP

1536:mZG0MaQ9u20DPpbuF30kpX9aIJeOX/hZZYF9WqoMurUE/ZZ1rSNJMiGXBe:Nr9u20Tpb+rpAyZZKF9WqJEz1+8dx

Score

10^/10

tofsee persistence trojan

Malware Config

Extracted

Family

tofsee

111.121.193.238

103.15.107.117

188.190.114.108

188.165.132.183

213.155.0.208

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
1164	eennasbz.exe
1708	eennasbz.exe

Deletes itself 1 IoCs

pid	Process
432	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe
1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\eennasbz.exe\""	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1168 set thread context of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1164 set thread context of 1708	1164	eennasbz.exe	31
PID 1708 set thread context of 1680	1708	eennasbz.exe	32

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe
1164	eennasbz.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1168 wrote to memory of 1640	1168	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	27
PID 1640 wrote to memory of 1164	1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	28
PID 1640 wrote to memory of 1164	1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	28
PID 1640 wrote to memory of 1164	1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	28
PID 1640 wrote to memory of 1164	1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	28
PID 1640 wrote to memory of 432	1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	29
PID 1640 wrote to memory of 432	1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	29
PID 1640 wrote to memory of 432	1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	29
PID 1640 wrote to memory of 432	1640	b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe	29
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1164 wrote to memory of 1708	1164	eennasbz.exe	31
PID 1708 wrote to memory of 1680	1708	eennasbz.exe	32
PID 1708 wrote to memory of 1680	1708	eennasbz.exe	32
PID 1708 wrote to memory of 1680	1708	eennasbz.exe	32
PID 1708 wrote to memory of 1680	1708	eennasbz.exe	32
PID 1708 wrote to memory of 1680	1708	eennasbz.exe	32
PID 1708 wrote to memory of 1680	1708	eennasbz.exe	32

C:\Users\Admin\AppData\Local\Temp\b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe
"C:\Users\Admin\AppData\Local\Temp\b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1168
- C:\Users\Admin\AppData\Local\Temp\b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe
  "C:\Users\Admin\AppData\Local\Temp\b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1640
- - C:\Users\Admin\eennasbz.exe
    "C:\Users\Admin\eennasbz.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1164
  - - C:\Users\Admin\eennasbz.exe
      "C:\Users\Admin\eennasbz.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:1708
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        
        PID:1680
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\4011.bat" "
    3⤵
    - Deletes itself
    PID:432

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\4011.bat

Filesize
302B

MD5
82f2f155771c7c4904c12c23cca7ea40

SHA1
822563caf201e35906c67abb8c319d3f1b9d3b59

SHA256
13e29eb85af8de8b174f5b8ab10165cfd73c24c5c8998c0c04edec2dd4af8531

SHA512
3ef45fe3747c6558140e2da0bef868bb65fe775ddb98dd6605b5f5bac5eb4acb6410b011eaac209404db76d38dc7142dcac1c89641c19a6f5a589e8f92576d0a

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

Filesize
43.7MB

MD5
f9f824bb16b542fdbe708fef74022151

SHA1
084df0a16cde9087adeec22795772834f8cffbe9

SHA256
0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

SHA512
df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

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

Filesize
43.7MB

MD5
f9f824bb16b542fdbe708fef74022151

SHA1
084df0a16cde9087adeec22795772834f8cffbe9

SHA256
0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

SHA512
df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

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

Filesize
43.7MB

MD5
f9f824bb16b542fdbe708fef74022151

SHA1
084df0a16cde9087adeec22795772834f8cffbe9

SHA256
0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

SHA512
df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

Download Submit
\Users\Admin\eennasbz.exe

Filesize
43.7MB

MD5
f9f824bb16b542fdbe708fef74022151

SHA1
084df0a16cde9087adeec22795772834f8cffbe9

SHA256
0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

SHA512
df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

Download Submit
\Users\Admin\eennasbz.exe

Filesize
43.7MB

MD5
f9f824bb16b542fdbe708fef74022151

SHA1
084df0a16cde9087adeec22795772834f8cffbe9

SHA256
0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

SHA512
df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

Download Submit
memory/1640-69-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1640-56-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1640-60-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1640-59-0x00000000760E1000-0x00000000760E3000-memory.dmp

Filesize
8KB

Download
memory/1640-61-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1680-81-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/1680-79-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/1680-87-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/1680-88-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/1708-77-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1708-78-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1708-84-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download