986849ad807ec4c2e195c84c2aac0e95171a709b87147e0cd3494d2aafc5edcc

Analysis

max time kernel
146s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
24/07/2023, 13:12

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General

Target

NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Size

327KB
MD5

3c9b74f66f1e8f4e606fb917c4edd3be
SHA1

8c398a0bf7465205adbddfa9d3dd07af145ec03f
SHA256

986849ad807ec4c2e195c84c2aac0e95171a709b87147e0cd3494d2aafc5edcc
SHA512

d4bacadde5dc9d00de7ba1f6ecae70fef58de6e1dede7e8b8f8bc822ef27730d43783f313c236bbbe0f1fa18ef54c7e399aa8907e7c64bdfc98c6846fb9c07c3
SSDEEP

6144:fJ2+JS2sFafI8U0obHCW/2a7XQcsPMjVWrG89gkPzDh1v:fJ2TFafJiHCWBWPMjVWrXf1v

Score

7^/10

Malware Config

Signatures

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000\Control Panel\International\Geo\Nation	NA_NA_3c9b74f66f1e8fexeexe_JC.exe

Executes dropped EXE 2 IoCs

pid	Process
544	csrssys.exe
1308	csrssys.exe

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

System Information Discovery
T1082

Modifies registry class 30 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\DefaultIcon\ = "%1"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\Local Settings	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\DefaultIcon\ = "%1"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Posix\\csrssys.exe\" /START \"%1\" %*"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell\runas\command	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell\open\command\IsolatedCommand = "\"%1\" %*"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell\runas\command\IsolatedCommand = "\"%1\" %*"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\ = "Application"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell\open\command	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\Content-Type = "application/x-msdownload"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\DefaultIcon	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell\runas\command\ = "\"%1\" %*"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\DefaultIcon	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell\open	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell\open\command\IsolatedCommand = "\"%1\" %*"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell\runas\command\IsolatedCommand = "\"%1\" %*"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell\runas	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell\open	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell\runas\command\ = "\"%1\" %*"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\ = "wexplorer"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell\open\command	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell\runas\command	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Key created	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\wexplorer\shell\runas	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\Content-Type = "application/x-msdownload"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000_Classes\.exe\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Posix\\csrssys.exe\" /START \"%1\" %*"	NA_NA_3c9b74f66f1e8fexeexe_JC.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	544	csrssys.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4292 wrote to memory of 544	4292	NA_NA_3c9b74f66f1e8fexeexe_JC.exe	88
PID 4292 wrote to memory of 544	4292	NA_NA_3c9b74f66f1e8fexeexe_JC.exe	88
PID 4292 wrote to memory of 544	4292	NA_NA_3c9b74f66f1e8fexeexe_JC.exe	88
PID 544 wrote to memory of 1308	544	csrssys.exe	89
PID 544 wrote to memory of 1308	544	csrssys.exe	89
PID 544 wrote to memory of 1308	544	csrssys.exe	89

C:\Users\Admin\AppData\Local\Temp\NA_NA_3c9b74f66f1e8fexeexe_JC.exe
"C:\Users\Admin\AppData\Local\Temp\NA_NA_3c9b74f66f1e8fexeexe_JC.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Users\Admin\AppData\Roaming\Microsoft\Posix\csrssys.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Posix\csrssys.exe" /START "C:\Users\Admin\AppData\Roaming\Microsoft\Posix\csrssys.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:544
- - C:\Users\Admin\AppData\Roaming\Microsoft\Posix\csrssys.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Posix\csrssys.exe"
    3⤵
    - Executes dropped EXE
    PID:1308

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\Microsoft\Posix\csrssys.exe

Filesize
327KB

MD5
187855db61f62d845e7e34c30766eb29

SHA1
2946e54d0ecb8b655784e36307c22d585970fcff

SHA256
042e07ddf978b2f3371533f58635ef1b119ee61cecd6c3ace90deb38cb001743

SHA512
a4a6b1e3616c88ba4ebc1fb3150af7f616f6cfaed1e09a478dcd3d91c7eaa91bcc38856ece6787d62a1409b87a90fcce49456fc49f735a7312c0aad691ebe25d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Posix\csrssys.exe

Filesize
327KB

MD5
187855db61f62d845e7e34c30766eb29

SHA1
2946e54d0ecb8b655784e36307c22d585970fcff

SHA256
042e07ddf978b2f3371533f58635ef1b119ee61cecd6c3ace90deb38cb001743

SHA512
a4a6b1e3616c88ba4ebc1fb3150af7f616f6cfaed1e09a478dcd3d91c7eaa91bcc38856ece6787d62a1409b87a90fcce49456fc49f735a7312c0aad691ebe25d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Posix\csrssys.exe

Filesize
327KB

MD5
187855db61f62d845e7e34c30766eb29

SHA1
2946e54d0ecb8b655784e36307c22d585970fcff

SHA256
042e07ddf978b2f3371533f58635ef1b119ee61cecd6c3ace90deb38cb001743

SHA512
a4a6b1e3616c88ba4ebc1fb3150af7f616f6cfaed1e09a478dcd3d91c7eaa91bcc38856ece6787d62a1409b87a90fcce49456fc49f735a7312c0aad691ebe25d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Posix\csrssys.exe

Filesize
327KB

MD5
187855db61f62d845e7e34c30766eb29

SHA1
2946e54d0ecb8b655784e36307c22d585970fcff

SHA256
042e07ddf978b2f3371533f58635ef1b119ee61cecd6c3ace90deb38cb001743

SHA512
a4a6b1e3616c88ba4ebc1fb3150af7f616f6cfaed1e09a478dcd3d91c7eaa91bcc38856ece6787d62a1409b87a90fcce49456fc49f735a7312c0aad691ebe25d

Download Submit