tofsee | e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812

General

Target

e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe
Size

128KB
MD5

18557ef30c2b6532c74712ca0c6b8d30
SHA1

219d4c24f6c3d412704bb88e6ee53ccc81cda412
SHA256

e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812
SHA512

91cf614334250cbd1955f2577e8c9992854e2b5effc787d2b79e9afe1f69f48d83728320330d21c17b7249a5a50309cea2b13c7f441a4c9aa5a42429b0a83f7b
SSDEEP

3072:EQ1m24hjpYg2C47wRHpv0rZS2jbxWGqt:EQQNbjJmwxAZSbGq

Score

10^/10

tofsee persistence trojan

Malware Config

Extracted

Family

tofsee

C2

91.218.38.211

188.130.237.71

185.25.48.10

188.165.132.183

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

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

Processes:

rejwbohp.exe

pid process

1648 rejwbohp.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1008 cmd.exe

pid	process
1648	rejwbohp.exe

pid	process
1008	cmd.exe

Loads dropped DLL 2 IoCs

Processes:

e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe

pid	process
916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe
916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\rejwbohp.exe\""	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rejwbohp.exe

description pid process target process

PID 1648 set thread context of 2012 1648 rejwbohp.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
Suspicious use of UnmapMainImage 2 IoCs

Processes:

e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exerejwbohp.exe

pid process

916 e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe
1648 rejwbohp.exe

description	pid	process	target process
PID 1648 set thread context of 2012	1648	rejwbohp.exe	svchost.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exerejwbohp.exe

description	pid	process	target process
PID 916 wrote to memory of 1648	916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe	rejwbohp.exe
PID 916 wrote to memory of 1648	916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe	rejwbohp.exe
PID 916 wrote to memory of 1648	916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe	rejwbohp.exe
PID 916 wrote to memory of 1648	916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe	rejwbohp.exe
PID 1648 wrote to memory of 2012	1648	rejwbohp.exe	svchost.exe
PID 1648 wrote to memory of 2012	1648	rejwbohp.exe	svchost.exe
PID 1648 wrote to memory of 2012	1648	rejwbohp.exe	svchost.exe
PID 1648 wrote to memory of 2012	1648	rejwbohp.exe	svchost.exe
PID 1648 wrote to memory of 2012	1648	rejwbohp.exe	svchost.exe
PID 1648 wrote to memory of 2012	1648	rejwbohp.exe	svchost.exe
PID 916 wrote to memory of 1008	916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe	cmd.exe
PID 916 wrote to memory of 1008	916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe	cmd.exe
PID 916 wrote to memory of 1008	916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe	cmd.exe
PID 916 wrote to memory of 1008	916	e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe
"C:\Users\Admin\AppData\Local\Temp\e77e9bd28dfc320d36293519ee10631996af59ccb93bb220b15ea21eb925b812.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:916

C:\Users\Admin\rejwbohp.exe
"C:\Users\Admin\rejwbohp.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1648

C:\Windows\SysWOW64\svchost.exe
svchost.exe
3⤵
PID:2012

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\4587.bat" "
2⤵
- Deletes itself
PID:1008

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

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\4587.bat
Filesize
302B

MD5
1e289fe8333eb92b7d6e9bf429f19df7

SHA1
2aa65dfd109e4761320ba77c7ef673ed330ec40f

SHA256
81bbedbed2653d500ed3264df40700053b523d39efd99ee14e1c204c88f5e45c

SHA512
8189bc3b2e7bd19d2f2ed429901a5c7ebd9af626c40a6c93eb9f579d7c3c08827617be41915e5505971159088db98fb56adb5e5d710153755048e54fe9a89dc3

Download Submit
C:\Users\Admin\rejwbohp.exe
Filesize
43.1MB

MD5
583cc9bbc45f96cf30d2e35d08c86467

SHA1
502cb29a461cfe58d9e42a01f9854efd25b804c2

SHA256
056e698bd68a5baf58bd2ba6a6ab9f86650aa5110a7095a9eb0678f962713dd4

SHA512
4d558e8044e06c1f7cd12e16424666133791fd875bd296f2a59c45752ea19714bd310047404e702a83698d608826c55897c8137f08e85c8274b8899fb65ab553

Download Submit
C:\Users\Admin\rejwbohp.exe
Filesize
43.1MB

MD5
583cc9bbc45f96cf30d2e35d08c86467

SHA1
502cb29a461cfe58d9e42a01f9854efd25b804c2

SHA256
056e698bd68a5baf58bd2ba6a6ab9f86650aa5110a7095a9eb0678f962713dd4

SHA512
4d558e8044e06c1f7cd12e16424666133791fd875bd296f2a59c45752ea19714bd310047404e702a83698d608826c55897c8137f08e85c8274b8899fb65ab553

Download Submit
\Users\Admin\rejwbohp.exe
Filesize
43.1MB

MD5
583cc9bbc45f96cf30d2e35d08c86467

SHA1
502cb29a461cfe58d9e42a01f9854efd25b804c2

SHA256
056e698bd68a5baf58bd2ba6a6ab9f86650aa5110a7095a9eb0678f962713dd4

SHA512
4d558e8044e06c1f7cd12e16424666133791fd875bd296f2a59c45752ea19714bd310047404e702a83698d608826c55897c8137f08e85c8274b8899fb65ab553

Download Submit
\Users\Admin\rejwbohp.exe
Filesize
43.1MB

MD5
583cc9bbc45f96cf30d2e35d08c86467

SHA1
502cb29a461cfe58d9e42a01f9854efd25b804c2

SHA256
056e698bd68a5baf58bd2ba6a6ab9f86650aa5110a7095a9eb0678f962713dd4

SHA512
4d558e8044e06c1f7cd12e16424666133791fd875bd296f2a59c45752ea19714bd310047404e702a83698d608826c55897c8137f08e85c8274b8899fb65ab553

Download Submit
memory/916-54-0x0000000076091000-0x0000000076093000-memory.dmp

Filesize
8KB

Download
memory/916-60-0x0000000000330000-0x0000000000367000-memory.dmp

Filesize
220KB

Download
memory/916-56-0x0000000000250000-0x0000000000262000-memory.dmp

Filesize
72KB

Download
memory/916-62-0x0000000000330000-0x0000000000367000-memory.dmp

Filesize
220KB

Download
memory/916-55-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/916-76-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1008-75-0x0000000000000000-mapping.dmp

Download
memory/1648-59-0x0000000000000000-mapping.dmp

Download
memory/1648-68-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1648-71-0x0000000000250000-0x0000000000262000-memory.dmp

Filesize
72KB

Download
memory/2012-67-0x00000000000C7860-mapping.dmp

Download
memory/2012-74-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2012-66-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2012-64-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2012-78-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads