tofsee | 21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b

General

Target

21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe
Size

260KB
MD5

e154be10e86c3b4ef92ec179ef7f8fd1
SHA1

2a99469cbf4e7b4e8a9c466756a6ae88eb344967
SHA256

21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b
SHA512

1434fcb691f52568f8e8d136cd1d2906c046d4f44be5adae2612e5193c4da1ca45af6226fe41b819710109d4b8bb9dbc45a981f01e64a3911726f7ac2ee2c80a
SSDEEP

3072:PXEvKdWLyRcVeYX1T51b+aDMe3K/TtolpJU5AvXm9hZCRRzMuWZgd3n:/eLFVeYX1iSMU4TilUqXucqgd3

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

pid	Process
4680	hbdlhbha.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4820	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\apofflxq\ImagePath = "C:\\Windows\\SysWOW64\\apofflxq\\hbdlhbha.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.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 4680 set thread context of 3860	4680	hbdlhbha.exe	105

Launches sc.exe 3 IoCs

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

pid	Process
3724	sc.exe
1316	sc.exe
4304	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 2 IoCs

pid	pid_target	Process	procid_target
4512	4716	WerFault.exe	82
5060	4680	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 4716 wrote to memory of 4092	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	85
PID 4716 wrote to memory of 4092	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	85
PID 4716 wrote to memory of 4092	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	85
PID 4716 wrote to memory of 3704	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	88
PID 4716 wrote to memory of 3704	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	88
PID 4716 wrote to memory of 3704	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	88
PID 4716 wrote to memory of 3724	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	90
PID 4716 wrote to memory of 3724	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	90
PID 4716 wrote to memory of 3724	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	90
PID 4716 wrote to memory of 1316	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	93
PID 4716 wrote to memory of 1316	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	93
PID 4716 wrote to memory of 1316	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	93
PID 4716 wrote to memory of 4304	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	95
PID 4716 wrote to memory of 4304	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	95
PID 4716 wrote to memory of 4304	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	95
PID 4716 wrote to memory of 4820	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	98
PID 4716 wrote to memory of 4820	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	98
PID 4716 wrote to memory of 4820	4716	21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe	98
PID 4680 wrote to memory of 3860	4680	hbdlhbha.exe	105
PID 4680 wrote to memory of 3860	4680	hbdlhbha.exe	105
PID 4680 wrote to memory of 3860	4680	hbdlhbha.exe	105
PID 4680 wrote to memory of 3860	4680	hbdlhbha.exe	105
PID 4680 wrote to memory of 3860	4680	hbdlhbha.exe	105

C:\Users\Admin\AppData\Local\Temp\21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe
"C:\Users\Admin\AppData\Local\Temp\21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4716
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\apofflxq\
  2⤵
  PID:4092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hbdlhbha.exe" C:\Windows\SysWOW64\apofflxq\
  2⤵
  PID:3704
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create apofflxq binPath= "C:\Windows\SysWOW64\apofflxq\hbdlhbha.exe /d\"C:\Users\Admin\AppData\Local\Temp\21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3724
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description apofflxq "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:1316
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start apofflxq
  2⤵
  - Launches sc.exe
  PID:4304
- 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:4820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 680
  2⤵
  - Program crash
  PID:4512

C:\Windows\SysWOW64\apofflxq\hbdlhbha.exe
C:\Windows\SysWOW64\apofflxq\hbdlhbha.exe /d"C:\Users\Admin\AppData\Local\Temp\21a0e859e84fcd7159996c98c8d9450845cf9dd4677edf6280b377e6f2e5ed9b.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4680
- 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:3860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4680 -s 516
  2⤵
  - Program crash
  PID:5060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4716 -ip 4716
1⤵
PID:3848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4680 -ip 4680
1⤵
PID:1048

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

New Service

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
12.0MB

MD5
8a3af81f3e77c85514e3aad5735241dc

SHA1
df7ea02ed3f1e87cae8851740b46705b47f16ab4

SHA256
662b03751a1e25551fc56beb9ccf4d5ab55eee2dcb50ef15f6511023b34e3890

SHA512
d5bcf5840c0031b8686453d302fcf1e2d3c1ce1f6a39ec76dfa340696cc122ffb0dbba5be09436c618cdd10aea486f298d5d8826ea7fea3aee7e1bc88bbb5fc6

Download Submit
C:\Windows\SysWOW64\apofflxq\hbdlhbha.exe

Filesize
12.0MB

MD5
8a3af81f3e77c85514e3aad5735241dc

SHA1
df7ea02ed3f1e87cae8851740b46705b47f16ab4

SHA256
662b03751a1e25551fc56beb9ccf4d5ab55eee2dcb50ef15f6511023b34e3890

SHA512
d5bcf5840c0031b8686453d302fcf1e2d3c1ce1f6a39ec76dfa340696cc122ffb0dbba5be09436c618cdd10aea486f298d5d8826ea7fea3aee7e1bc88bbb5fc6

Download Submit
memory/3860-147-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/3860-153-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/3860-151-0x00000000007C0000-0x00000000007D5000-memory.dmp

Filesize
84KB

Download
memory/4680-152-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/4680-150-0x0000000002C79000-0x0000000002C89000-memory.dmp

Filesize
64KB

Download
memory/4716-144-0x0000000002D00000-0x0000000002D13000-memory.dmp

Filesize
76KB

Download
memory/4716-145-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/4716-132-0x0000000002D8D000-0x0000000002D9E000-memory.dmp

Filesize
68KB

Download
memory/4716-136-0x0000000000400000-0x0000000002BA9000-memory.dmp

Filesize
39.7MB

Download
memory/4716-143-0x0000000002D8D000-0x0000000002D9E000-memory.dmp

Filesize
68KB

Download
memory/4716-133-0x0000000002D00000-0x0000000002D13000-memory.dmp

Filesize
76KB

Download

Analysis

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