tofsee | 281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913

General

Target

281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe
Size

13.1MB
MD5

873c0a981c80da05593897c6aec0e842
SHA1

3fb083e944c36cc3a938e64d9c10ace3065d444a
SHA256

281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913
SHA512

27c119c25dbe7cca2da3043eff931bfc0d9ad5b34cd7489000181cf3d8aa6814b83ef1185f6e7f692e9e87cca17d9b5c5d89ab0402e9264840fa80f5da21800d
SSDEEP

393216:tkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk7:tkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk7

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2840	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\rlzhnbug\ImagePath = "C:\\Windows\\SysWOW64\\rlzhnbug\\nzauplmj.exe"	svchost.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-1-5-21-3811856890-180006922-3689258494-1000\Control Panel\International\Geo\Nation	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe

Deletes itself 1 IoCs

pid	Process
2784	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
764	nzauplmj.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 764 set thread context of 2784	764	nzauplmj.exe	105

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1336	sc.exe
4664	sc.exe
1292	sc.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3080 wrote to memory of 1808	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	89
PID 3080 wrote to memory of 1808	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	89
PID 3080 wrote to memory of 1808	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	89
PID 3080 wrote to memory of 980	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	92
PID 3080 wrote to memory of 980	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	92
PID 3080 wrote to memory of 980	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	92
PID 3080 wrote to memory of 1292	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	95
PID 3080 wrote to memory of 1292	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	95
PID 3080 wrote to memory of 1292	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	95
PID 3080 wrote to memory of 1336	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	97
PID 3080 wrote to memory of 1336	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	97
PID 3080 wrote to memory of 1336	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	97
PID 3080 wrote to memory of 4664	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	99
PID 3080 wrote to memory of 4664	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	99
PID 3080 wrote to memory of 4664	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	99
PID 3080 wrote to memory of 2840	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	101
PID 3080 wrote to memory of 2840	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	101
PID 3080 wrote to memory of 2840	3080	281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe	101
PID 764 wrote to memory of 2784	764	nzauplmj.exe	105
PID 764 wrote to memory of 2784	764	nzauplmj.exe	105
PID 764 wrote to memory of 2784	764	nzauplmj.exe	105
PID 764 wrote to memory of 2784	764	nzauplmj.exe	105
PID 764 wrote to memory of 2784	764	nzauplmj.exe	105

C:\Users\Admin\AppData\Local\Temp\281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe
"C:\Users\Admin\AppData\Local\Temp\281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3080
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rlzhnbug\
  2⤵
  PID:1808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzauplmj.exe" C:\Windows\SysWOW64\rlzhnbug\
  2⤵
  PID:980
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create rlzhnbug binPath= "C:\Windows\SysWOW64\rlzhnbug\nzauplmj.exe /d\"C:\Users\Admin\AppData\Local\Temp\281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1292
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description rlzhnbug "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1336
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start rlzhnbug
  2⤵
  - Launches sc.exe
  PID:4664
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:2840

C:\Windows\SysWOW64\rlzhnbug\nzauplmj.exe
C:\Windows\SysWOW64\rlzhnbug\nzauplmj.exe /d"C:\Users\Admin\AppData\Local\Temp\281caa07aa1da7dbfecf48057da8f8d81fa98661de792de568d5d26765d57913.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:764
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:2784

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

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nzauplmj.exe

Filesize
12.0MB

MD5
e53c5065714275906dbd62cd4a071d0f

SHA1
7e5eace3ba31dd0358758fdb7995f0dce02b5b45

SHA256
90b1664f8c5c837bf888ff2b82d15cf104e8bb3ce11b2c7c9238352907b1945f

SHA512
0a1b3afc08e7a5a928559d61ab089f206b4753f25353e1bf1b4f17ff43c4df5842c45e4833ef06973f81b3f7c0ed1c46000844b62e32a8852e77649a6d4e207b

Download Submit
C:\Windows\SysWOW64\rlzhnbug\nzauplmj.exe

Filesize
12.0MB

MD5
e53c5065714275906dbd62cd4a071d0f

SHA1
7e5eace3ba31dd0358758fdb7995f0dce02b5b45

SHA256
90b1664f8c5c837bf888ff2b82d15cf104e8bb3ce11b2c7c9238352907b1945f

SHA512
0a1b3afc08e7a5a928559d61ab089f206b4753f25353e1bf1b4f17ff43c4df5842c45e4833ef06973f81b3f7c0ed1c46000844b62e32a8852e77649a6d4e207b

Download Submit
memory/764-12-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/764-8-0x0000000000ED0000-0x0000000000ED1000-memory.dmp

Filesize
4KB

Download
memory/2784-10-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download
memory/2784-15-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download
memory/2784-14-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download
memory/2784-16-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download
memory/2784-17-0x0000000000CF0000-0x0000000000D05000-memory.dmp

Filesize
84KB

Download
memory/3080-4-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3080-0-0x0000000002270000-0x0000000002271000-memory.dmp

Filesize
4KB

Download
memory/3080-6-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3080-2-0x00000000005C0000-0x00000000005C1000-memory.dmp

Filesize
4KB

Download
memory/3080-1-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads