2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820

General

Target

2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe
Size

252KB
MD5

ebb22b5608c4b16460163a48d65b9dd4
SHA1

254458ad1bdab9c30d09183c3d53d0dc29beb246
SHA256

2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820
SHA512

d61d43a1cab46c631a4a985038fe102fa767a615cc60c40988c9fbfdc885a7494e0da534ac43883c07d2933eccee4dc2c285348eb359a54af3b53ffbd091d79f
SSDEEP

6144:c0B1xJ0dXZMP4HJPLQvvxnVcaOqH7475dvJF+wEFvRe:cY1lVcao5JFx

Score

8^/10

evasion persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

crss.exe

pid process

900 crss.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

684 netsh.exe

pid	process
900	crss.exe

pid	process
684	netsh.exe

Drops startup file 2 IoCs

Processes:

crss.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1167f011b23c9e0489743a7e9cecd9cb.exe	crss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1167f011b23c9e0489743a7e9cecd9cb.exe	crss.exe

Loads dropped DLL 2 IoCs

Processes:

2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe

pid	process
1048	2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe
1048	2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

crss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\1167f011b23c9e0489743a7e9cecd9cb = "\"C:\\Users\\Admin\\AppData\\Roaming\\crss.exe\" .."	crss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\1167f011b23c9e0489743a7e9cecd9cb = "\"C:\\Users\\Admin\\AppData\\Roaming\\crss.exe\" .."	crss.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

crss.exe

pid process

900 crss.exe

pid	process
900	crss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.execrss.exe

description	pid	process
Token: SeDebugPrivilege	1048	2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe
Token: SeDebugPrivilege	900	crss.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.execrss.exe

description	pid	process	target process
PID 1048 wrote to memory of 900	1048	2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe	crss.exe
PID 1048 wrote to memory of 900	1048	2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe	crss.exe
PID 1048 wrote to memory of 900	1048	2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe	crss.exe
PID 1048 wrote to memory of 900	1048	2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe	crss.exe
PID 900 wrote to memory of 684	900	crss.exe	netsh.exe
PID 900 wrote to memory of 684	900	crss.exe	netsh.exe
PID 900 wrote to memory of 684	900	crss.exe	netsh.exe
PID 900 wrote to memory of 684	900	crss.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe
"C:\Users\Admin\AppData\Local\Temp\2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1048

C:\Users\Admin\AppData\Roaming\crss.exe
"C:\Users\Admin\AppData\Roaming\crss.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:900

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\crss.exe" "crss.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:684

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

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

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Downloads

C:\Users\Admin\AppData\Roaming\crss.exe
Filesize
252KB

MD5
ebb22b5608c4b16460163a48d65b9dd4

SHA1
254458ad1bdab9c30d09183c3d53d0dc29beb246

SHA256
2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820

SHA512
d61d43a1cab46c631a4a985038fe102fa767a615cc60c40988c9fbfdc885a7494e0da534ac43883c07d2933eccee4dc2c285348eb359a54af3b53ffbd091d79f

Download Submit
C:\Users\Admin\AppData\Roaming\crss.exe
Filesize
252KB

MD5
ebb22b5608c4b16460163a48d65b9dd4

SHA1
254458ad1bdab9c30d09183c3d53d0dc29beb246

SHA256
2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820

SHA512
d61d43a1cab46c631a4a985038fe102fa767a615cc60c40988c9fbfdc885a7494e0da534ac43883c07d2933eccee4dc2c285348eb359a54af3b53ffbd091d79f

Download Submit
\Users\Admin\AppData\Roaming\crss.exe
Filesize
252KB

MD5
ebb22b5608c4b16460163a48d65b9dd4

SHA1
254458ad1bdab9c30d09183c3d53d0dc29beb246

SHA256
2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820

SHA512
d61d43a1cab46c631a4a985038fe102fa767a615cc60c40988c9fbfdc885a7494e0da534ac43883c07d2933eccee4dc2c285348eb359a54af3b53ffbd091d79f

Download Submit
\Users\Admin\AppData\Roaming\crss.exe
Filesize
252KB

MD5
ebb22b5608c4b16460163a48d65b9dd4

SHA1
254458ad1bdab9c30d09183c3d53d0dc29beb246

SHA256
2ebcb53eea5f6649736bfad1bb72b537bc25301d7d87dca7ea75518a014b8820

SHA512
d61d43a1cab46c631a4a985038fe102fa767a615cc60c40988c9fbfdc885a7494e0da534ac43883c07d2933eccee4dc2c285348eb359a54af3b53ffbd091d79f

Download Submit
memory/684-63-0x0000000000000000-mapping.dmp

Download
memory/900-58-0x0000000000000000-mapping.dmp

Download
memory/900-65-0x0000000074A00000-0x0000000074FAB000-memory.dmp

Filesize
5.7MB

Download
memory/900-66-0x0000000074A00000-0x0000000074FAB000-memory.dmp

Filesize
5.7MB

Download
memory/1048-54-0x00000000759F1000-0x00000000759F3000-memory.dmp

Filesize
8KB

Download
memory/1048-55-0x0000000074A00000-0x0000000074FAB000-memory.dmp

Filesize
5.7MB

Download
memory/1048-62-0x0000000074A00000-0x0000000074FAB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads