tofsee | 2e864ab2bdf9055ef8b206b9d640562c68894be7dd4462249d05a973be43cbdf

General

Target

969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe
Size

147KB
MD5

bf64cf006d94eea938529abb0e6b4ee8
SHA1

2808b73fcee94aaaa39240549c616f1d97eb8839
SHA256

969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3
SHA512

a5d281994b61c3664cfa3d783a6f2fac17b57ac9a2fb01f69534f11dcc70ae2229a0ce7b1ce4dca2bb6ee5ae9f29f17dbcc11a721cc93ce7f0aa098a055bbf23
SSDEEP

3072:qxHNuRGCqn5Si5hL5/SxJ4aOEnr8LUwHx/r0NfuCOD:iGGCEhd/IDr8QwHdr0Ah

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

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

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

xeeijtdo.exe

pid process

4656 xeeijtdo.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3432 netsh.exe

pid	process
4656	xeeijtdo.exe

pid	process
3432	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\egxburtx\ImagePath = "C:\\Windows\\SysWOW64\\egxburtx\\xeeijtdo.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

Processes:

969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

xeeijtdo.exe

description pid process target process

PID 4656 set thread context of 3200 4656 xeeijtdo.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1364 sc.exe
4276 sc.exe
2052 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4656 set thread context of 3200	4656	xeeijtdo.exe	svchost.exe

pid	process
1364	sc.exe
4276	sc.exe
2052	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
4244	2596	WerFault.exe	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe
4716	4656	WerFault.exe	xeeijtdo.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exexeeijtdo.exe

description	pid	process	target process
PID 2596 wrote to memory of 3612	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	cmd.exe
PID 2596 wrote to memory of 3612	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	cmd.exe
PID 2596 wrote to memory of 3612	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	cmd.exe
PID 2596 wrote to memory of 5084	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	cmd.exe
PID 2596 wrote to memory of 5084	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	cmd.exe
PID 2596 wrote to memory of 5084	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	cmd.exe
PID 2596 wrote to memory of 1364	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 1364	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 1364	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 4276	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 4276	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 4276	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 2052	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 2052	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 2052	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	sc.exe
PID 2596 wrote to memory of 3432	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	netsh.exe
PID 2596 wrote to memory of 3432	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	netsh.exe
PID 2596 wrote to memory of 3432	2596	969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe	netsh.exe
PID 4656 wrote to memory of 3200	4656	xeeijtdo.exe	svchost.exe
PID 4656 wrote to memory of 3200	4656	xeeijtdo.exe	svchost.exe
PID 4656 wrote to memory of 3200	4656	xeeijtdo.exe	svchost.exe
PID 4656 wrote to memory of 3200	4656	xeeijtdo.exe	svchost.exe
PID 4656 wrote to memory of 3200	4656	xeeijtdo.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe
"C:\Users\Admin\AppData\Local\Temp\969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2596

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\egxburtx\
2⤵
PID:3612

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xeeijtdo.exe" C:\Windows\SysWOW64\egxburtx\
2⤵
PID:5084

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create egxburtx binPath= "C:\Windows\SysWOW64\egxburtx\xeeijtdo.exe /d\"C:\Users\Admin\AppData\Local\Temp\969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1364

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description egxburtx "wifi internet conection"
2⤵
- Launches sc.exe
PID:4276

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start egxburtx
2⤵
- Launches sc.exe
PID:2052

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:3432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2596 -s 648
2⤵
- Program crash
PID:4244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 2596 -ip 2596
1⤵
PID:2692

C:\Windows\SysWOW64\egxburtx\xeeijtdo.exe
C:\Windows\SysWOW64\egxburtx\xeeijtdo.exe /d"C:\Users\Admin\AppData\Local\Temp\969cbe894bade6e664ebc759576a44abba87e73dc093e09b7a97ec3c1099bbb3.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4656

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
PID:3200

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4656 -s 512
2⤵
- Program crash
PID:4716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 4656 -ip 4656
1⤵
PID:3128

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\xeeijtdo.exe
Filesize
11.7MB

MD5
559a9213e8303071054320ed7b83f002

SHA1
b066b0bb033243a8be9d8730b60b50c031d7938e

SHA256
060e22d64ccb08dcc270673c4088370d29fceb86ddc9d2789489db69e5ea699c

SHA512
444ec5e1991b904e212f0c6ea83636ed4ae2bc1fc06cc712f4a3545934a157e910ab155cd6c501f506f9dda5538ddea2dc67f65f3eab071d4269eccf82d3b222

Download Submit
C:\Windows\SysWOW64\egxburtx\xeeijtdo.exe
Filesize
11.7MB

MD5
559a9213e8303071054320ed7b83f002

SHA1
b066b0bb033243a8be9d8730b60b50c031d7938e

SHA256
060e22d64ccb08dcc270673c4088370d29fceb86ddc9d2789489db69e5ea699c

SHA512
444ec5e1991b904e212f0c6ea83636ed4ae2bc1fc06cc712f4a3545934a157e910ab155cd6c501f506f9dda5538ddea2dc67f65f3eab071d4269eccf82d3b222

Download Submit
memory/1364-138-0x0000000000000000-mapping.dmp

Download
memory/2052-140-0x0000000000000000-mapping.dmp

Download
memory/2596-132-0x0000000000C5D000-0x0000000000C6D000-memory.dmp

Filesize
64KB

Download
memory/2596-133-0x00000000026E0000-0x00000000026F3000-memory.dmp

Filesize
76KB

Download
memory/2596-134-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/2596-143-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/3200-146-0x0000000000000000-mapping.dmp

Download
memory/3200-152-0x0000000000350000-0x0000000000365000-memory.dmp

Filesize
84KB

Download
memory/3200-151-0x0000000000350000-0x0000000000365000-memory.dmp

Filesize
84KB

Download
memory/3200-147-0x0000000000350000-0x0000000000365000-memory.dmp

Filesize
84KB

Download
memory/3432-141-0x0000000000000000-mapping.dmp

Download
memory/3612-135-0x0000000000000000-mapping.dmp

Download
memory/4276-139-0x0000000000000000-mapping.dmp

Download
memory/4656-144-0x0000000000C39000-0x0000000000C49000-memory.dmp

Filesize
64KB

Download
memory/4656-150-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/4656-145-0x0000000000400000-0x0000000000AD6000-memory.dmp

Filesize
6.8MB

Download
memory/5084-136-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads