b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff

General

Target

b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe
Size

585KB
MD5

2536137c3cfe5f6ee54ee95962e9f3a8
SHA1

9b533b32e63f4524c9d69a61d3315d8a56831fb0
SHA256

b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff
SHA512

0e17085e32a81ee34e3d146f225f5c560ed2650d4498abe9f19e63d6c4e84798e0ab180487bd664cfeabde859f2392270835486cfdce2f8b242b1e3e1616d36b
SSDEEP

12288:f+iTr9rgkF48uSz94xgbxSP51Zm+FBbq3XfzCEx:f+egkC8dSx6SPzFBu3POg

Score

8^/10

upx

Malware Config

Signatures

UPX packed file 26 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4684-132-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-135-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-134-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-136-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-137-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-139-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-141-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-143-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-145-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-147-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-149-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-151-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-153-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-155-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-157-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-159-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-163-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-161-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-165-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-167-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-169-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-171-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-173-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-175-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-177-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4684-178-0x0000000010000000-0x000000001003D000-memory.dmp	upx

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\PastCbURJ.sys	b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4464	4684	WerFault.exe	80

Modifies Internet Explorer start page 1 TTPs 1 IoCs

stealer

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Start Page = "http://www.wz123.com/?nuli"	b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage\Command	b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
648	Process not Found
648	Process not Found

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
4684	b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe
4684	b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe
4684	b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe
4684	b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe
4684	b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe

C:\Users\Admin\AppData\Local\Temp\b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe
"C:\Users\Admin\AppData\Local\Temp\b4332a187a8e6c60831e0905a790b1b1d5c7812a355e2a645a9544523e3ac4ff.exe"
1⤵
- Drops file in System32 directory
- Modifies Internet Explorer start page
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4684
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4684 -s 1260
  2⤵
  - Program crash
  PID:4464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4684 -ip 4684
1⤵
PID:4300

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4684-132-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-135-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-134-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-136-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-137-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-139-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-141-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-143-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-145-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-147-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-149-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-151-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-153-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-155-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-157-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-159-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-163-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-161-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-165-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-167-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-169-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-171-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-173-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-175-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-177-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download
memory/4684-178-0x0000000010000000-0x000000001003D000-memory.dmp

Filesize
244KB

Download

Analysis

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