e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402

Analysis

max time kernel
151s
max time network
155s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
29/10/2022, 18:10

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General

Target

e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe
Size

40KB
MD5

83e91f9f1967f120374ce633a2b4f60f
SHA1

e9a919bea6c3d30784b85935b3f2267e8d4792aa
SHA256

e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402
SHA512

15feaa061f9e7edc04aed4c64d3c8db90fdc7a252595a59c517040b31095b4de28a77bfe949f1b2f10055d2cc4422e9d3037376399e2ae5126b214803278a62e
SSDEEP

384:hlB32mZh3bYOfkPNZ+tCg6QSmjosDJDCDJDJknpLBhc6k1Qxx5ZY+/ZwtvgeEhWH:dZHsOfkPT+Ag6gRNc/Qxx7Zwves+E

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1216	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
1700	e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe
1700	e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\MSconfig = "C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe"	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	csrss.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\v:	csrss.exe
File opened (read-only)	\??\x:	csrss.exe
File opened (read-only)	\??\z:	csrss.exe
File opened (read-only)	\??\e:	csrss.exe
File opened (read-only)	\??\j:	csrss.exe
File opened (read-only)	\??\t:	csrss.exe
File opened (read-only)	\??\l:	csrss.exe
File opened (read-only)	\??\m:	csrss.exe
File opened (read-only)	\??\r:	csrss.exe
File opened (read-only)	\??\s:	csrss.exe
File opened (read-only)	\??\u:	csrss.exe
File opened (read-only)	\??\b:	csrss.exe
File opened (read-only)	\??\i:	csrss.exe
File opened (read-only)	\??\k:	csrss.exe
File opened (read-only)	\??\n:	csrss.exe
File opened (read-only)	\??\o:	csrss.exe
File opened (read-only)	\??\p:	csrss.exe
File opened (read-only)	\??\y:	csrss.exe
File opened (read-only)	\??\f:	csrss.exe
File opened (read-only)	\??\g:	csrss.exe
File opened (read-only)	\??\h:	csrss.exe
File opened (read-only)	\??\q:	csrss.exe
File opened (read-only)	\??\w:	csrss.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1700	e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe
1216	csrss.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 1216	1700	e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe	27
PID 1700 wrote to memory of 1216	1700	e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe	27
PID 1700 wrote to memory of 1216	1700	e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe	27
PID 1700 wrote to memory of 1216	1700	e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe	27

C:\Users\Admin\AppData\Local\Temp\e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe
"C:\Users\Admin\AppData\Local\Temp\e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\AppData\Roaming\csrss.exe
  C:\Users\Admin\AppData\Roaming\csrss.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Enumerates connected drives
  - Suspicious use of SetWindowsHookEx
  PID:1216

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\csrss.exe

Filesize
40KB

MD5
83e91f9f1967f120374ce633a2b4f60f

SHA1
e9a919bea6c3d30784b85935b3f2267e8d4792aa

SHA256
e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402

SHA512
15feaa061f9e7edc04aed4c64d3c8db90fdc7a252595a59c517040b31095b4de28a77bfe949f1b2f10055d2cc4422e9d3037376399e2ae5126b214803278a62e

Download Submit
\Users\Admin\AppData\Roaming\csrss.exe

Filesize
40KB

MD5
83e91f9f1967f120374ce633a2b4f60f

SHA1
e9a919bea6c3d30784b85935b3f2267e8d4792aa

SHA256
e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402

SHA512
15feaa061f9e7edc04aed4c64d3c8db90fdc7a252595a59c517040b31095b4de28a77bfe949f1b2f10055d2cc4422e9d3037376399e2ae5126b214803278a62e

Download Submit
\Users\Admin\AppData\Roaming\csrss.exe

Filesize
40KB

MD5
83e91f9f1967f120374ce633a2b4f60f

SHA1
e9a919bea6c3d30784b85935b3f2267e8d4792aa

SHA256
e3ceec903fc322ff1c2c115b2382cf8bad6416bc8afd1638bfb74856af533402

SHA512
15feaa061f9e7edc04aed4c64d3c8db90fdc7a252595a59c517040b31095b4de28a77bfe949f1b2f10055d2cc4422e9d3037376399e2ae5126b214803278a62e

Download Submit
memory/1216-62-0x0000000074E41000-0x0000000074E43000-memory.dmp

Filesize
8KB

Download