714fcbd22f9fba63620475e6ed81724ba1a8f7479872dfe4978703578a900f46

General

Target
KexSetup_Release_1_1_4_1528.exe
Size 4.0MB
Sample260507-jp2grads7p
SHA256 714fcbd22f9fba63620475e6ed81724ba1a8f7479872dfe4978703578a900f46
MD5 738ab01ee1bb4f0b1c85f02c8fc37c4d
SHA1 2010c2c37c552d26a4e23eb46395e0e69b17d329
SHA512 4228d509038179c6002e4c1b85467e4bd41a0b5cad37d3a75f9259f3135cae12e5040c2729ce9bbaeac5ac272d5dbd0365e3bc3118f043a15abbca95f48b3ae4
SSDEEP 98304:rS0eQQl5VUJK42PIPVthnk4reYCuhDhkAUFgfFFPDVlUJ:WXZU84JlDrQuphkT8Zm
TLSH
T15B163338E85A8C13D5DF1330B456E7DD38964FF81462A3D24D66400D9EFBCA26DF9A22
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

discovery persistence

Malware Config

Signatures

Event Triggered Execution: Image File Execution Options Injection 1 TTPs 8 IoCs

persistence

Image File Execution Options Injection

T1546.012

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{VxKexPropagationVirtualKey}\VerifierDlls = "KexDll.dll"	KexSetup.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{VxKexPropagationVirtualKey}	KexSetup.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{VxKexPropagationVirtualKey}\GlobalFlag = "256"	KexSetup.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{VxKexPropagationVirtualKey}\VerifierFlags = "2147483648"	KexSetup.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{VxKexPropagationVirtualKey}\VerifierDlls = "KexDll.dll"	KexSetup.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{VxKexPropagationVirtualKey}	KexSetup.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{VxKexPropagationVirtualKey}\GlobalFlag = "256"	KexSetup.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{VxKexPropagationVirtualKey}\VerifierFlags = "2147483648"	KexSetup.exe

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-1-5-21-636600838-1632888396-3521553955-1000\Control Panel\International\Geo\Nation	KexSetup.exe

Executes dropped EXE 3 IoCs

pid	Process
1560	KexSetup.exe
4936	KexSetup.exe
2524	KexSetup.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1168	4936	WerFault.exe	84
4508	2524	WerFault.exe	88

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	KexSetup_Release_1_1_4_1528.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	KexSetup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	KexSetup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	KexSetup.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4936	KexSetup.exe
Token: SeDebugPrivilege	2524	KexSetup.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1592 wrote to memory of 1560	1592	KexSetup_Release_1_1_4_1528.exe	83
PID 1560 wrote to memory of 4936	1560	KexSetup.exe	84
PID 1560 wrote to memory of 2524	1560	KexSetup.exe	88

C:\Users\Admin\AppData\Local\Temp\KexSetup_Release_1_1_4_1528.exe
"C:\Users\Admin\AppData\Local\Temp\KexSetup_Release_1_1_4_1528.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1592
- C:\Users\Admin\AppData\Local\Temp\7z73CCD638\KexSetup.exe
  C:\Users\Admin\AppData\Local\Temp\7z73CCD638\KexSetup.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1560
- - C:\Users\Admin\AppData\Local\Temp\7z73CCD638\KexSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\7z73CCD638\KexSetup.exe" /SILENTUNATTEND /HWND:524922 /KEXDIR:"C:\Program Files\VxKex"
    3⤵
    - Event Triggered Execution: Image File Execution Options Injection
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4936
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4936 -s 508
      4⤵
      Program crash
      PID:1168
- - C:\Users\Admin\AppData\Local\Temp\7z73CCD638\KexSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\7z73CCD638\KexSetup.exe" /SILENTUNATTEND /HWND:524922 /KEXDIR:"C:\Program Files\VxKex"
    3⤵
    - Event Triggered Execution: Image File Execution Options Injection
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2524
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2524 -s 508
      4⤵
      Program crash
      PID:4508

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4936 -ip 4936
1⤵
PID:1856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 2524 -ip 2524
1⤵
PID:4456

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Image File Execution Options Injection

1

T1546.012

Privilege Escalation

Event Triggered Execution

1

T1546

Image File Execution Options Injection

1

T1546.012

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

KexSetup.exe

Path C:\Users\Admin\AppData\Local\Temp\7z73CCD638\KexSetup.exe
Size 67KB
SHA256 9419fecb789e3d1675425a479ade7ed3218b4ca222fa7537bcaa88681b51715e
MD5 957c94b85b8a97c7fafd179544310388
SHA1 af4b1fc5d224977191140b3a9a4e44448e2fa4ee
SHA512 1b8bee4de500c03282dc2ae54222a4e415117c8c02e867b9eab0befffa448b4ee461d1d98a7573a4c1a5510f95d28e18c3806312a19b6e770ed90eab07f85797
SSDEEP 1536:ut7Tac8FO2/Qxdu6wyajQKPV7vpn8Jr/W9NEy1FCRG:6xmaxdu6DajQKtL2UNEYFC
TLSH
T1F863B2427BE94115F2F3AFB1BFB566218A7BBC629C34C91E53800A5E1972B10D974B33
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1560-87-0x0000000000710000-0x000000000078A000-memory.dmp

Download

memory/1560-89-0x0000000000710000-0x000000000078A000-memory.dmp

Download

memory/2524-130-0x00000000008D0000-0x000000000094A000-memory.dmp

Download

memory/4936-86-0x00000000013C0000-0x000000000143A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads