tofsee | 34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2

General

Target

34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe
Size

224KB
MD5

44677e5592e39e6bd557da131ddacfdd
SHA1

04a4b16d418ac4f349c6d47b1270ad31b8c94a93
SHA256

34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2
SHA512

14f1cc903d1c94dbb87e59fe894e7d15dd6edb2a559e4629d75f8353c96112d2a8cc5e49a2db502d88a477db4426c03d2e1b5860c1f03e4adfede23ed415b57b

Score

10^/10

tofsee persistence trojan

Malware Config

Extracted

Family

tofsee

C2

103.232.222.57

111.121.193.242

123.249.0.22

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Executes dropped EXE 1 IoCs

Processes:

nsrulzde.exe

pid process

4852 nsrulzde.exe

pid	process
4852	nsrulzde.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:

34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\nsrulzde.exe\""	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

nsrulzde.exe

description pid process target process

PID 4852 set thread context of 888 4852 nsrulzde.exe svchost.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 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

5004 888 WerFault.exe svchost.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exensrulzde.exe

pid process

1012 34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe
4852 nsrulzde.exe

description	pid	process	target process
PID 4852 set thread context of 888	4852	nsrulzde.exe	svchost.exe

pid	pid_target	process	target process
5004	888	WerFault.exe	svchost.exe

pid	process
1012	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe
4852	nsrulzde.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exensrulzde.exe

description	pid	process	target process
PID 1012 wrote to memory of 4852	1012	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe	nsrulzde.exe
PID 1012 wrote to memory of 4852	1012	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe	nsrulzde.exe
PID 1012 wrote to memory of 4852	1012	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe	nsrulzde.exe
PID 1012 wrote to memory of 4316	1012	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe	cmd.exe
PID 1012 wrote to memory of 4316	1012	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe	cmd.exe
PID 1012 wrote to memory of 4316	1012	34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe	cmd.exe
PID 4852 wrote to memory of 888	4852	nsrulzde.exe	svchost.exe
PID 4852 wrote to memory of 888	4852	nsrulzde.exe	svchost.exe
PID 4852 wrote to memory of 888	4852	nsrulzde.exe	svchost.exe
PID 4852 wrote to memory of 888	4852	nsrulzde.exe	svchost.exe
PID 4852 wrote to memory of 888	4852	nsrulzde.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe
"C:\Users\Admin\AppData\Local\Temp\34d4dc94d70088a824e612804d4d3858a961a0a7a3ed8ef6b6b0f202beeae6d2.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1012

C:\Users\Admin\nsrulzde.exe
"C:\Users\Admin\nsrulzde.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4852

C:\Windows\SysWOW64\svchost.exe
svchost.exe
3⤵
PID:888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 888 -s 460
4⤵
- Program crash
PID:5004

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\5578.bat" "
2⤵
PID:4316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 888 -ip 888
1⤵
PID:1828

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

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\5578.bat
Filesize
302B

MD5
8cf0790ce37da9a42577f4f65fe11995

SHA1
ae027ddb64cd3d9ea9d00d11ab65cac22cae329f

SHA256
5120fa9a3476996ef2772ef8a8d6d10f49419a57a645b93b88b9fb408db09dc9

SHA512
aa28d9790dde71be1c4261b672cc63b14891c6ba318d54f10289c34ec9892604b62aa5b90531f636e9bc43b8a136dcb30ae6b648ec5ba8c8e5154931e019dfce

Download Submit
C:\Users\Admin\nsrulzde.exe
Filesize
45.5MB

MD5
1e88362e11b950e08f55c959d523462f

SHA1
940191f9af4a2f3aa625e90301cd768cfd791c26

SHA256
f956619f3ee4563b7c09fc7f62cbed2f42c26b50f00ba19bcba9bfa826f36afb

SHA512
7c213170680ba8d4ffc89ffd697cfbf32b4b32f79bba4a7f3ad8fade0a53e8c3bc96ea451b91ff4b17c2fa2de1af669b811b04165af270f8fa29a13989cfeffc

Download Submit
C:\Users\Admin\nsrulzde.exe
Filesize
45.5MB

MD5
1e88362e11b950e08f55c959d523462f

SHA1
940191f9af4a2f3aa625e90301cd768cfd791c26

SHA256
f956619f3ee4563b7c09fc7f62cbed2f42c26b50f00ba19bcba9bfa826f36afb

SHA512
7c213170680ba8d4ffc89ffd697cfbf32b4b32f79bba4a7f3ad8fade0a53e8c3bc96ea451b91ff4b17c2fa2de1af669b811b04165af270f8fa29a13989cfeffc

Download Submit
memory/888-160-0x0000000000510000-0x0000000000522000-memory.dmp

Filesize
72KB

Download
memory/888-159-0x0000000000510000-0x0000000000522000-memory.dmp

Filesize
72KB

Download
memory/888-155-0x0000000000510000-0x0000000000522000-memory.dmp

Filesize
72KB

Download
memory/888-154-0x0000000000000000-mapping.dmp

Download
memory/1012-146-0x0000000074B40000-0x0000000074C9D000-memory.dmp

Filesize
1.4MB

Download
memory/1012-132-0x0000000002EE1000-0x0000000002EE6000-memory.dmp

Filesize
20KB

Download
memory/1012-139-0x0000000074B40000-0x0000000074C9D000-memory.dmp

Filesize
1.4MB

Download
memory/1012-138-0x0000000002EE1000-0x0000000002EE6000-memory.dmp

Filesize
20KB

Download
memory/1012-134-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4316-145-0x0000000000000000-mapping.dmp

Download
memory/4852-148-0x0000000002B81000-0x0000000002B86000-memory.dmp

Filesize
20KB

Download
memory/4852-140-0x0000000000000000-mapping.dmp

Download
memory/4852-158-0x0000000074B40000-0x0000000074C9D000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads