tofsee | d080665a2e670ebca96d72f5766911321583b00cb822dabc4d7a5da13e5c04e4

General

Target

53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe
Size

292KB
MD5

4e39579f1251ae570e145e352e7393f7
SHA1

07497b310187f77e2c18364c7a0e31068be822d1
SHA256

53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462
SHA512

29dd728463e77e3988a074a97b36ebba3f0876e684ea96746b3ec0aeaf78e4ee25182b34a51900b6400fd8a22ea9a911bb15ae195bd04419f8303b9412920009
SSDEEP

3072:Xk6e+HiNFjbrieXWP72/BRczZpgAhtBE3k2Bxz+4a2GMW/ft/Dr05xK:7zkjbrFi78BkpgKC3z2YK

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3460 netsh.exe

pid	process
3460	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\sshwvudn\ImagePath = "C:\\Windows\\SysWOW64\\sshwvudn\\oaqdrqim.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:

53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe

Executes dropped EXE 1 IoCs

Processes:

oaqdrqim.exe

pid process

3860 oaqdrqim.exe
Drops file in System32 directory 1 IoCs

Processes:

svchost.exe

description ioc process

File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

oaqdrqim.exe

description pid process target process

PID 3860 set thread context of 2784 3860 oaqdrqim.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

3204 sc.exe
4456 sc.exe
1488 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3860	oaqdrqim.exe

description	ioc	process
File created	C:\Windows\SysWOW64\config\systemprofile:.repos	svchost.exe

description	pid	process	target process
PID 3860 set thread context of 2784	3860	oaqdrqim.exe	svchost.exe

pid	process
3204	sc.exe
4456	sc.exe
1488	sc.exe

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
1112	1220	WerFault.exe	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe
4776	3860	WerFault.exe	oaqdrqim.exe

Modifies data under HKEY_USERS 2 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Control Panel\Buses	svchost.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 9c8ef03d1b87460124edb47d450dd49d084297dce82e72baa4c0808ad6cad61d1a1498ed84cd945d24edb47d470dd49d024195daf71261adc06d04fda6e22673bbc9154961cda56811da8645713fe3ad644490bdb07d27e4975a00cac4e53d428dc9741037fba66517d58d4f750db8f2054991cfdb2470dd906d5d8dc4bf662fd39a460b37f9942e569beb092d60b19d501ec385b37927e99d6d5892a7ec384290c4195804fca16813df8c48703de39d800deebda407c681a46d34fdc58d541d93c206565bbee62b24edb47d440dd49d13477dabc14d14dda46ef8efc78d541de595441332fbba6a11c38648700dd49d642df4bd844d14dda46d34fdc48d541de4ad743d04cd945d24edb47d440dd49d642df4bd844d14dda46d34fdc48d541de44e753d04	svchost.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exeoaqdrqim.exe

description	pid	process	target process
PID 1220 wrote to memory of 2316	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1220 wrote to memory of 2316	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1220 wrote to memory of 2316	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1220 wrote to memory of 3228	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1220 wrote to memory of 3228	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1220 wrote to memory of 3228	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	cmd.exe
PID 1220 wrote to memory of 3204	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 3204	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 3204	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 4456	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 4456	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 4456	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 1488	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 1488	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 1488	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	sc.exe
PID 1220 wrote to memory of 3460	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	netsh.exe
PID 1220 wrote to memory of 3460	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	netsh.exe
PID 1220 wrote to memory of 3460	1220	53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe	netsh.exe
PID 3860 wrote to memory of 2784	3860	oaqdrqim.exe	svchost.exe
PID 3860 wrote to memory of 2784	3860	oaqdrqim.exe	svchost.exe
PID 3860 wrote to memory of 2784	3860	oaqdrqim.exe	svchost.exe
PID 3860 wrote to memory of 2784	3860	oaqdrqim.exe	svchost.exe
PID 3860 wrote to memory of 2784	3860	oaqdrqim.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe
"C:\Users\Admin\AppData\Local\Temp\53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1220

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sshwvudn\
2⤵
PID:2316

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oaqdrqim.exe" C:\Windows\SysWOW64\sshwvudn\
2⤵
PID:3228

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create sshwvudn binPath= "C:\Windows\SysWOW64\sshwvudn\oaqdrqim.exe /d\"C:\Users\Admin\AppData\Local\Temp\53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:3204

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description sshwvudn "wifi internet conection"
2⤵
- Launches sc.exe
PID:4456

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start sshwvudn
2⤵
- Launches sc.exe
PID:1488

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:3460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1220 -s 1272
2⤵
- Program crash
PID:1112

C:\Windows\SysWOW64\sshwvudn\oaqdrqim.exe
C:\Windows\SysWOW64\sshwvudn\oaqdrqim.exe /d"C:\Users\Admin\AppData\Local\Temp\53c6ebd75518ed05b22ab762b476f48313b700283358dccb7d55b02f29cfe462.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3860

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3860 -s 508
2⤵
- Program crash
PID:4776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 376 -p 1220 -ip 1220
1⤵
PID:3492

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3860 -ip 3860
1⤵
PID:2220

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\oaqdrqim.exe
Filesize
14.6MB

MD5
3e77e039f6639b6ca3938e5efa785a3e

SHA1
304c50482b14619ca56a5c135f29d3b0576edcd5

SHA256
f82216cb96fffd41ee5c28649ce274a886b60757fb755e0fade44b636188c76a

SHA512
0a92f11ed241bc83ea417f1ddfdba53931653e40f917f8d1c70f24299527687ec55772061a3f63c0fc6d68218959c8a9d771cf37de5f3fb7b9155633fc825cfb

Download Submit
C:\Windows\SysWOW64\sshwvudn\oaqdrqim.exe
Filesize
14.6MB

MD5
3e77e039f6639b6ca3938e5efa785a3e

SHA1
304c50482b14619ca56a5c135f29d3b0576edcd5

SHA256
f82216cb96fffd41ee5c28649ce274a886b60757fb755e0fade44b636188c76a

SHA512
0a92f11ed241bc83ea417f1ddfdba53931653e40f917f8d1c70f24299527687ec55772061a3f63c0fc6d68218959c8a9d771cf37de5f3fb7b9155633fc825cfb

Download Submit
memory/1220-135-0x0000000000710000-0x0000000000723000-memory.dmp

Filesize
76KB

Download
memory/1220-138-0x0000000000400000-0x00000000006C7000-memory.dmp

Filesize
2.8MB

Download
memory/2784-140-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/2784-143-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/2784-144-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/2784-146-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/2784-147-0x0000000000190000-0x00000000001A5000-memory.dmp

Filesize
84KB

Download
memory/3860-145-0x0000000000400000-0x00000000006C7000-memory.dmp

Filesize
2.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads