c643c6bde2641f7f7cd70e4bf78e9f03329a21fcee2554dc8b31fa25eae81e84

Analysis

max time kernel
142s
max time network
120s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
26-12-2023 11:44

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General

Target

6bce5addba27609a17ceabef5225970e.exe
Size

42KB
MD5

6bce5addba27609a17ceabef5225970e
SHA1

66e3add1c262a95eb007a34d2a44bce3d473044f
SHA256

c643c6bde2641f7f7cd70e4bf78e9f03329a21fcee2554dc8b31fa25eae81e84
SHA512

8a1c68a0b4c0ccd1cb40d89d07d81d29ed222a0b2a9ab4e57467f2baa2ee20051357cf4ade2c9e2b64361a1b03d0ab71b2430c0c35a7ea2a8959267b1e304f56
SSDEEP

768:FErskEV4aJPvp5ILsNW7SKVd19Eky6Iu04Fg0Mk2CXgchMtCevOk:FIwtJPTqKWLd1EKFg0ACXOCev9

Score

7^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2196	CSRSS.EXE

Loads dropped DLL 2 IoCs

pid	Process
2236	6bce5addba27609a17ceabef5225970e.exe
2236	6bce5addba27609a17ceabef5225970e.exe

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2236-0-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral1/files/0x000c00000001232d-4.dat	upx
behavioral1/memory/2196-12-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral1/memory/2236-9-0x0000000000400000-0x000000000041D000-memory.dmp	upx
behavioral1/memory/2236-8-0x0000000000250000-0x000000000026D000-memory.dmp	upx
behavioral1/files/0x000c00000001232d-10.dat	upx
behavioral1/memory/2196-13-0x0000000000400000-0x000000000041D000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\.svchost = "C:\\Windows\\System\\CSRSS.EXE"	6bce5addba27609a17ceabef5225970e.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\System\CSRSS.EXE	6bce5addba27609a17ceabef5225970e.exe
File opened for modification	C:\Windows\System\CSRSS.EXE	6bce5addba27609a17ceabef5225970e.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2196	2236	6bce5addba27609a17ceabef5225970e.exe	28
PID 2236 wrote to memory of 2196	2236	6bce5addba27609a17ceabef5225970e.exe	28
PID 2236 wrote to memory of 2196	2236	6bce5addba27609a17ceabef5225970e.exe	28
PID 2236 wrote to memory of 2196	2236	6bce5addba27609a17ceabef5225970e.exe	28

C:\Users\Admin\AppData\Local\Temp\6bce5addba27609a17ceabef5225970e.exe
"C:\Users\Admin\AppData\Local\Temp\6bce5addba27609a17ceabef5225970e.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\System\CSRSS.EXE
  C:\Windows\System\CSRSS.EXE
  2⤵
  - Executes dropped EXE
  PID:2196

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\system\CSRSS.EXE

Filesize
42KB

MD5
6bce5addba27609a17ceabef5225970e

SHA1
66e3add1c262a95eb007a34d2a44bce3d473044f

SHA256
c643c6bde2641f7f7cd70e4bf78e9f03329a21fcee2554dc8b31fa25eae81e84

SHA512
8a1c68a0b4c0ccd1cb40d89d07d81d29ed222a0b2a9ab4e57467f2baa2ee20051357cf4ade2c9e2b64361a1b03d0ab71b2430c0c35a7ea2a8959267b1e304f56

Download Submit
memory/2196-12-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2196-13-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2236-0-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2236-11-0x0000000000250000-0x000000000026D000-memory.dmp

Filesize
116KB

Download
memory/2236-9-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/2236-8-0x0000000000250000-0x000000000026D000-memory.dmp

Filesize
116KB

Download
memory/2236-15-0x0000000000250000-0x000000000026D000-memory.dmp

Filesize
116KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads