tofsee | 29aecf60d2b78688a409dd254eba6414e13fded9ebca1ac8beb624e252ae2f0c

General

Target

015e6a91fc2397216cdf2e0c0e7e4132.exe
Size

198KB
MD5

015e6a91fc2397216cdf2e0c0e7e4132
SHA1

5f3a2877d37c6b0f392e42ac646af7afa0e45bcf
SHA256

29aecf60d2b78688a409dd254eba6414e13fded9ebca1ac8beb624e252ae2f0c
SHA512

d89c0bfc28f2ba1e697cf25e73c3196b8300be3f6b01355136fac523160671df1e84935f0b80d16db015b864a3d9d0aca2a13bf55071581a73202437d557e000

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

��Op��;L��jy��d-��Mݤm4�čT��t=͔]$��}D ԝd-��Mݤm4�čT_�t=��)Q��-`��@��Mݤm4�čT��t=͔]$��}D ԝd-��Mݤm4�čT��t=v�]$�

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Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

qgmpwdxk.exe

pid process

1680 qgmpwdxk.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112
Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1352 svchost.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:

qgmpwdxk.exe

description pid process target process

PID 1680 set thread context of 1352 1680 qgmpwdxk.exe svchost.exe
Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1680	qgmpwdxk.exe

pid	process
1352	svchost.exe

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

description	pid	process	target process
PID 1680 set thread context of 1352	1680	qgmpwdxk.exe	svchost.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 = 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	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

015e6a91fc2397216cdf2e0c0e7e4132.exeqgmpwdxk.exe

description	pid	process	target process
PID 1140 wrote to memory of 1128	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	cmd.exe
PID 1140 wrote to memory of 1128	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	cmd.exe
PID 1140 wrote to memory of 1128	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	cmd.exe
PID 1140 wrote to memory of 1128	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	cmd.exe
PID 1140 wrote to memory of 1712	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	cmd.exe
PID 1140 wrote to memory of 1712	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	cmd.exe
PID 1140 wrote to memory of 1712	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	cmd.exe
PID 1140 wrote to memory of 1712	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	cmd.exe
PID 1140 wrote to memory of 1716	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 1716	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 1716	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 1716	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 2036	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 2036	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 2036	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 2036	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 320	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 320	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 320	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 320	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	sc.exe
PID 1140 wrote to memory of 1436	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	netsh.exe
PID 1140 wrote to memory of 1436	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	netsh.exe
PID 1140 wrote to memory of 1436	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	netsh.exe
PID 1140 wrote to memory of 1436	1140	015e6a91fc2397216cdf2e0c0e7e4132.exe	netsh.exe
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	svchost.exe
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	svchost.exe
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	svchost.exe
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	svchost.exe
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	svchost.exe
PID 1680 wrote to memory of 1352	1680	qgmpwdxk.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\015e6a91fc2397216cdf2e0c0e7e4132.exe
"C:\Users\Admin\AppData\Local\Temp\015e6a91fc2397216cdf2e0c0e7e4132.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1140

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nambzfbl\
2⤵
PID:1128

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qgmpwdxk.exe" C:\Windows\SysWOW64\nambzfbl\
2⤵
PID:1712

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create nambzfbl binPath= "C:\Windows\SysWOW64\nambzfbl\qgmpwdxk.exe /d\"C:\Users\Admin\AppData\Local\Temp\015e6a91fc2397216cdf2e0c0e7e4132.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
PID:1716

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description nambzfbl "wifi internet conection"
2⤵
PID:2036

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start nambzfbl
2⤵
PID:320

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⤵
PID:1436

C:\Windows\SysWOW64\nambzfbl\qgmpwdxk.exe
C:\Windows\SysWOW64\nambzfbl\qgmpwdxk.exe /d"C:\Users\Admin\AppData\Local\Temp\015e6a91fc2397216cdf2e0c0e7e4132.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1680

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1352

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

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\qgmpwdxk.exe
Filesize
12.7MB

MD5
ff8cca8022c3200e86c89890b5b6b294

SHA1
04fab2ef4e84e359fa4ad896a19768933f5ac46b

SHA256
b1c9ef0e0353582acfd7d7cb9ef6b316f377b86f95c019315ee5d854d4447187

SHA512
29a9bb7b825339677d42109d5a5d0680eb79423273e88d4ac200c91dd80e4f686fbedfebbd04facf923bf83f25255a4e6e59b60756ff8e6c76a7d422a7920c4b

Download Submit
C:\Windows\SysWOW64\nambzfbl\qgmpwdxk.exe
Filesize
12.7MB

MD5
ff8cca8022c3200e86c89890b5b6b294

SHA1
04fab2ef4e84e359fa4ad896a19768933f5ac46b

SHA256
b1c9ef0e0353582acfd7d7cb9ef6b316f377b86f95c019315ee5d854d4447187

SHA512
29a9bb7b825339677d42109d5a5d0680eb79423273e88d4ac200c91dd80e4f686fbedfebbd04facf923bf83f25255a4e6e59b60756ff8e6c76a7d422a7920c4b

Download Submit
memory/320-63-0x0000000000000000-mapping.dmp

Download
memory/1128-55-0x0000000000000000-mapping.dmp

Download
memory/1140-66-0x0000000000D7E000-0x0000000000D8C000-memory.dmp

Filesize
56KB

Download
memory/1140-58-0x0000000000220000-0x0000000000233000-memory.dmp

Filesize
76KB

Download
memory/1140-60-0x0000000000400000-0x00000000008FA000-memory.dmp

Filesize
5.0MB

Download
memory/1140-56-0x0000000000D7E000-0x0000000000D8C000-memory.dmp

Filesize
56KB

Download
memory/1140-67-0x0000000000400000-0x00000000008FA000-memory.dmp

Filesize
5.0MB

Download
memory/1140-54-0x00000000762C1000-0x00000000762C3000-memory.dmp

Filesize
8KB

Download
memory/1352-70-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1352-83-0x00000000000E0000-0x00000000000E6000-memory.dmp

Filesize
24KB

Download
memory/1352-86-0x00000000001C0000-0x00000000001D0000-memory.dmp

Filesize
64KB

Download
memory/1352-79-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1352-72-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1352-73-0x00000000000C9A6B-mapping.dmp

Download
memory/1352-88-0x00000000000C0000-0x00000000000D5000-memory.dmp

Filesize
84KB

Download
memory/1352-80-0x0000000001780000-0x000000000198F000-memory.dmp

Filesize
2.1MB

Download
memory/1436-65-0x0000000000000000-mapping.dmp

Download
memory/1680-74-0x0000000000ABE000-0x0000000000ACB000-memory.dmp

Filesize
52KB

Download
memory/1680-78-0x0000000000400000-0x00000000008FA000-memory.dmp

Filesize
5.0MB

Download
memory/1712-57-0x0000000000000000-mapping.dmp

Download
memory/1716-61-0x0000000000000000-mapping.dmp

Download
memory/2036-62-0x0000000000000000-mapping.dmp

Download

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