fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 10:43

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General

Target

fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe
Size

134KB
MD5

bf7a574d33ac96a604f47d9a1ad8fd42
SHA1

cea208747404be8840a98662ed671d981f798381
SHA256

fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da
SHA512

7025d63e568dfc97e95d7bf168baeb0c73d60b6a66f059b7b652689ccc6e7021cb406d6610f9ed4c12f2f40fa11b0e2586346549e5768458a55822a899fa5e5a
SSDEEP

1536:YGYU/W2/HG6QMauSV3ixJHABLrmhH7i9eNOOg00GqMIK7aGZh3SOr:YfU/WF6QMauSuiWNi9eNOl0007NZIOr

Score

9^/10

persistence upx

Malware Config

Signatures

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/memory/4648-0-0x00000000007D0000-0x00000000007F8000-memory.dmp	UPX
behavioral2/files/0x00080000000233c6-3.dat	UPX
behavioral2/memory/2372-4-0x00000000006B0000-0x00000000006D8000-memory.dmp	UPX
behavioral2/memory/4648-6-0x00000000007D0000-0x00000000007F8000-memory.dmp	UPX
behavioral2/memory/2372-7-0x00000000006B0000-0x00000000006D8000-memory.dmp	UPX
behavioral2/memory/4648-8-0x00000000007D0000-0x00000000007F8000-memory.dmp	UPX

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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe

Executes dropped EXE 1 IoCs

pid	Process
2372	wuauclt.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4648-0-0x00000000007D0000-0x00000000007F8000-memory.dmp	upx
behavioral2/files/0x00080000000233c6-3.dat	upx
behavioral2/memory/2372-4-0x00000000006B0000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4648-6-0x00000000007D0000-0x00000000007F8000-memory.dmp	upx
behavioral2/memory/2372-7-0x00000000006B0000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4648-8-0x00000000007D0000-0x00000000007F8000-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\Window Update = "\"C:\\ProgramData\\Update\\wuauclt.exe\" /run"	fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4648 wrote to memory of 2372	4648	fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe	82
PID 4648 wrote to memory of 2372	4648	fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe	82
PID 4648 wrote to memory of 2372	4648	fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe	82
PID 4648 wrote to memory of 3280	4648	fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe	91
PID 4648 wrote to memory of 3280	4648	fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe	91
PID 4648 wrote to memory of 3280	4648	fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe	91

C:\Users\Admin\AppData\Local\Temp\fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe
"C:\Users\Admin\AppData\Local\Temp\fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4648
- C:\ProgramData\Update\wuauclt.exe
  "C:\ProgramData\Update\wuauclt.exe" /run
  2⤵
  - Executes dropped EXE
  PID:2372
- C:\windows\SysWOW64\cmd.exe
  "C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\fb4374ef5f4fefe9270b164405d944d1d42eab5e1277c775d076ac39dfed64da.exe" >> NUL
  2⤵
  PID:3280

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Update\wuauclt.exe

Filesize
134KB

MD5
d7e26d79e41fd7a635ce74d8d8a15e17

SHA1
0a6a32a1812b4c8cd23d5cf65e36784024523a63

SHA256
1f185de4d2a072e65b7423fdabcd39a8e008ee2d6fbb600801be8d8657ea662d

SHA512
64fe1d5d62b72ffffc11a80e0206e4d776905ee5534104cbd86985d5f7f47ddfe22b51e28358e12643cc2caed601bd4194ef3a2371aadd0022ef2fe5f364623a

Download Submit
memory/2372-4-0x00000000006B0000-0x00000000006D8000-memory.dmp

Filesize
160KB

Download
memory/2372-7-0x00000000006B0000-0x00000000006D8000-memory.dmp

Filesize
160KB

Download
memory/4648-0-0x00000000007D0000-0x00000000007F8000-memory.dmp

Filesize
160KB

Download
memory/4648-6-0x00000000007D0000-0x00000000007F8000-memory.dmp

Filesize
160KB

Download
memory/4648-8-0x00000000007D0000-0x00000000007F8000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads