tofsee | c1e715fb0909c534c4ff13489946bdde4921e7a9bb1c7bc4f8b970ee1fbb0240

Analysis

max time kernel
151s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2022, 17:32

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General

Target
file.exe
Size 148KB
Sample221126-v4as5abf93
SHA256 c1e715fb0909c534c4ff13489946bdde4921e7a9bb1c7bc4f8b970ee1fbb0240
MD5 351c599f6bd24495c7b2552994dd5e05
SHA1 fe9a30760b106eb1fbc04243dc74e8160a450145
SHA512 bead26354914919147501b7b1427dd09e1ce322f950df6411640f9873ef9e40680af8d9f09a6360af1f886dfdb67a48bbd2281684aca4a27f16e8ca5fbbae658
SSDEEP 3072:OlMgyB5eSV8m5IKusJhSLGdXG2KpxbL0dDl:tgqNVtfJhLBUNY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

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

pid	Process
3400	tqkliqgn.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
2316	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\zypzowdr\ImagePath = "C:\\Windows\\SysWOW64\\zypzowdr\\tqkliqgn.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	file.exe

Drops file in System32 directory 1 IoCs

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3400 set thread context of 3188	3400	tqkliqgn.exe	98

Launches sc.exe 3 IoCs

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

pid	Process
1552	sc.exe
2532	sc.exe
1544	sc.exe

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

System Information Discovery
T1082

Program crash 3 IoCs

pid	pid_target	Process	procid_target
3776	3400	WerFault.exe	97
1292	3400	WerFault.exe	97
4640	3400	WerFault.exe	97

Modifies data under HKEY_USERS 2 IoCs

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

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4412 wrote to memory of 3000	4412	file.exe	85
PID 4412 wrote to memory of 3000	4412	file.exe	85
PID 4412 wrote to memory of 3000	4412	file.exe	85
PID 4412 wrote to memory of 3888	4412	file.exe	87
PID 4412 wrote to memory of 3888	4412	file.exe	87
PID 4412 wrote to memory of 3888	4412	file.exe	87
PID 4412 wrote to memory of 1544	4412	file.exe	89
PID 4412 wrote to memory of 1544	4412	file.exe	89
PID 4412 wrote to memory of 1544	4412	file.exe	89
PID 4412 wrote to memory of 1552	4412	file.exe	91
PID 4412 wrote to memory of 1552	4412	file.exe	91
PID 4412 wrote to memory of 1552	4412	file.exe	91
PID 4412 wrote to memory of 2532	4412	file.exe	93
PID 4412 wrote to memory of 2532	4412	file.exe	93
PID 4412 wrote to memory of 2532	4412	file.exe	93
PID 4412 wrote to memory of 2316	4412	file.exe	95
PID 4412 wrote to memory of 2316	4412	file.exe	95
PID 4412 wrote to memory of 2316	4412	file.exe	95
PID 3400 wrote to memory of 3188	3400	tqkliqgn.exe	98
PID 3400 wrote to memory of 3188	3400	tqkliqgn.exe	98
PID 3400 wrote to memory of 3188	3400	tqkliqgn.exe	98
PID 3400 wrote to memory of 3188	3400	tqkliqgn.exe	98
PID 3400 wrote to memory of 3188	3400	tqkliqgn.exe	98

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4412
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zypzowdr\
  2⤵
  PID:3000
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tqkliqgn.exe" C:\Windows\SysWOW64\zypzowdr\
  2⤵
  PID:3888
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create zypzowdr binPath= "C:\Windows\SysWOW64\zypzowdr\tqkliqgn.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:1544
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description zypzowdr "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1552
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start zypzowdr
  2⤵
  - Launches sc.exe
  PID:2532
- 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:2316

C:\Windows\SysWOW64\zypzowdr\tqkliqgn.exe
C:\Windows\SysWOW64\zypzowdr\tqkliqgn.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3400
- 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:3188
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3400 -s 660
  2⤵
  - Program crash
  PID:3776
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3400 -s 720
  2⤵
  - Program crash
  PID:1292
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3400 -s 736
  2⤵
  - Program crash
  PID:4640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3400 -ip 3400
1⤵
PID:4372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3400 -ip 3400
1⤵
PID:388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 3400 -ip 3400
1⤵
PID:2504

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

New Service

T1050

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

New Service

T1050

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tqkliqgn.exe

Path C:\Users\Admin\AppData\Local\Temp\tqkliqgn.exe
Size 12.3MB
SHA256 24627dab48c669481fd33b8d4e30b3cb62e882e2dde272aa6554fbc9ce52be7e
MD5 e6961b6d9d2740449b3706303b7e17f7
SHA1 e03fa511cc3a13632230f4478c196ed89ee260f5
SHA512 1cc55905fc30bc754fca38b7210c1ef3ea8098e307b36ef36aec45a3fa39ff41e58f96f92fd7ab23792e6e353647581a108d8b8443246faa98a6e63c7a7e1849
SSDEEP 98304:IxYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYL:I
MD5 SHA1 SHA512 SSDEEP

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tqkliqgn.exe

Path C:\Windows\SysWOW64\zypzowdr\tqkliqgn.exe
Size 12.3MB
SHA256 24627dab48c669481fd33b8d4e30b3cb62e882e2dde272aa6554fbc9ce52be7e
MD5 e6961b6d9d2740449b3706303b7e17f7
SHA1 e03fa511cc3a13632230f4478c196ed89ee260f5
SHA512 1cc55905fc30bc754fca38b7210c1ef3ea8098e307b36ef36aec45a3fa39ff41e58f96f92fd7ab23792e6e353647581a108d8b8443246faa98a6e63c7a7e1849
SSDEEP 98304:IxYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYL:I
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3188-152-0x0000000000130000-0x0000000000145000-memory.dmp

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memory/3188-161-0x00000000005F0000-0x0000000000600000-memory.dmp

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memory/3188-158-0x00000000005E0000-0x00000000005E6000-memory.dmp

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memory/3188-155-0x0000000002000000-0x000000000220F000-memory.dmp

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memory/3188-154-0x0000000000130000-0x0000000000145000-memory.dmp

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memory/3188-147-0x0000000000130000-0x0000000000145000-memory.dmp

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memory/3400-150-0x0000000000DE3000-0x0000000000DF3000-memory.dmp

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memory/3400-151-0x0000000000400000-0x0000000000AD7000-memory.dmp

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memory/3400-153-0x0000000000DE3000-0x0000000000DF3000-memory.dmp

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memory/4412-133-0x00000000001C0000-0x00000000001D3000-memory.dmp

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memory/4412-132-0x0000000000B09000-0x0000000000B1A000-memory.dmp

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memory/4412-144-0x0000000000400000-0x0000000000AD7000-memory.dmp

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memory/4412-134-0x0000000000400000-0x0000000000AD7000-memory.dmp

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memory/4412-143-0x0000000000B09000-0x0000000000B1A000-memory.dmp

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memory/4412-135-0x00000000001C0000-0x00000000001D3000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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