e838f1dba1ce9cedad4ee3a080cb1d98976b945c8b76763687c27589f75cb1be

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
26/02/2024, 04:50

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
a578b6df4879a6ed2bca74299afb6015.exe
Size 124KB
Sample240226-ff9j8adb92
SHA256 e838f1dba1ce9cedad4ee3a080cb1d98976b945c8b76763687c27589f75cb1be
MD5 a578b6df4879a6ed2bca74299afb6015
SHA1 b89fbb9491b02b29e160b132201e94c06ca7b2a1
SHA512 3e29c107ba9aa085a0c551b9d49a6dc789f40e244d7184c3313f08e966f013a44e93dc39e50ae4ae8b190629dc6baf8fde0d289d6361e61cfa9cd53c608f26dd
SSDEEP 1536:IT23KSUCoqtjDHGxcGsZK1G5NYFBxNLNE2CLuFFVlRuiHCrnzK3PlB:HECo0DmPsI1GoBxNB0LuFFIiiryNB
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

discovery exploit upx

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
2916	takeown.exe
1804	icacls.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-1-5-21-910440534-423636034-2318342392-1000\Control Panel\International\Geo\Nation	a578b6df4879a6ed2bca74299afb6015.exe

Deletes itself 1 IoCs

pid	Process
3156	regsvr32.exe

Loads dropped DLL 1 IoCs

pid	Process
3156	regsvr32.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2916	takeown.exe
1804	icacls.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1544-0-0x0000000000400000-0x0000000000421000-memory.dmp	upx
behavioral2/memory/1544-2-0x0000000000400000-0x0000000000421000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\apa.dll	regsvr32.exe
File created	C:\Windows\SysWOW64\rpcss.dll	regsvr32.exe
File opened for modification	C:\Windows\SysWOW64\rpcss.dll	regsvr32.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3156	regsvr32.exe
3156	regsvr32.exe
3156	regsvr32.exe
3156	regsvr32.exe
3156	regsvr32.exe
3156	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3156	regsvr32.exe
Token: SeTakeOwnershipPrivilege	2916	takeown.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1544 wrote to memory of 3156	1544	a578b6df4879a6ed2bca74299afb6015.exe	89
PID 1544 wrote to memory of 3156	1544	a578b6df4879a6ed2bca74299afb6015.exe	89
PID 1544 wrote to memory of 3156	1544	a578b6df4879a6ed2bca74299afb6015.exe	89
PID 3156 wrote to memory of 2916	3156	regsvr32.exe	90
PID 3156 wrote to memory of 2916	3156	regsvr32.exe	90
PID 3156 wrote to memory of 2916	3156	regsvr32.exe	90
PID 3156 wrote to memory of 1804	3156	regsvr32.exe	92
PID 3156 wrote to memory of 1804	3156	regsvr32.exe	92
PID 3156 wrote to memory of 1804	3156	regsvr32.exe	92
PID 3156 wrote to memory of 808	3156	regsvr32.exe	84

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DcomLaunch -p
1⤵
PID:808

C:\Users\Admin\AppData\Local\Temp\a578b6df4879a6ed2bca74299afb6015.exe
"C:\Users\Admin\AppData\Local\Temp\a578b6df4879a6ed2bca74299afb6015.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1544
- C:\Windows\SysWOW64\regsvr32.exe
  "C:\Windows\system32\regsvr32.exe" /s C:\Users\Admin\AppData\Local\Temp\~e573bb1.tmp ,C:\Users\Admin\AppData\Local\Temp\a578b6df4879a6ed2bca74299afb6015.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3156
- - C:\Windows\SysWOW64\takeown.exe
    takeown /f "C:\Windows\system32\rpcss.dll"
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:2916
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Windows\system32\rpcss.dll" /grant administrators:F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

~e573bb1.tmp

Path C:\Users\Admin\AppData\Local\Temp\~e573bb1.tmp
Size 1.0MB
SHA256 ed1830cf27f77dd17006fe4ffc9187a58d24b07cbef26389fbef3ae9442993d7
MD5 dca9f1e9f5091080031a5e7a22685d24
SHA1 9fba4698bac060efce2581d0f83011d9d1f0f238
SHA512 f5bc375e6d75b4082ee4b9c0b99897179058a1b82eb1deb9c6cca1ac2c49a026f4d76ece0a4a394663ee3f1cb8b2a60ef8ae7e260669aa4f4907955cd2f92320
SSDEEP 3072:BfhdEsgvbAUS2O/3VQ4Tft2ZJJ7c3gQxLZ:Jhust/lQ6ft2Zn7GgQt
MD5 SHA1 SHA512 SSDEEP

Submit Download

apa.dll

Path C:\Windows\SysWOW64\apa.dll
Size 217B
SHA256 350f2ef2a0c4263ade9031bb11d1ee6566ca659a9ec5f72d05fef383a5a1318c
MD5 ecbceeb0796a4d38b68979e7efbc3c46
SHA1 5a0b13ac10a97424222935d58e2d7e790c1c8098
SHA512 01d1e16b1880f9fb234855f85c3854bd55e8ee1327730f974679a9cf18f8daf3dcbf8ce854bbf59b0bd28d100a6f0a2a0a9da076cda046a4094f251409e67157
MD5 SHA1 SHA512

Submit Download

memory/1544-0-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/1544-2-0x0000000000400000-0x0000000000421000-memory.dmp

Download