bdc7ffeef3b5a1883c2436061a2c1500bebe3351c53fdd08363b0a8a6688c875

Analysis

max time kernel
167s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13-03-2024 00:44

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General

Target

$TEMP/BroomSetup.exe
Size

1.7MB
MD5

eee5ddcffbed16222cac0a1b4e2e466e
SHA1

28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5
SHA256

2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54
SHA512

8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc
SSDEEP

49152:YUnaQiKJ8N+AadA6mICFhNGffVCPi9NUko6jE:ZwKa+u6mICFSwPKDK

Score

7^/10

upx

Malware Config

Signatures

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral6/memory/972-0-0x0000000000400000-0x0000000000930000-memory.dmp	upx
behavioral6/memory/972-5-0x0000000000400000-0x0000000000930000-memory.dmp	upx

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

544 schtasks.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

BroomSetup.exe

pid process

972 BroomSetup.exe

pid	process
544	schtasks.exe

pid	process
972	BroomSetup.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

BroomSetup.execmd.exe

description	pid	process	target process
PID 972 wrote to memory of 476	972	BroomSetup.exe	cmd.exe
PID 972 wrote to memory of 476	972	BroomSetup.exe	cmd.exe
PID 972 wrote to memory of 476	972	BroomSetup.exe	cmd.exe
PID 476 wrote to memory of 3712	476	cmd.exe	chcp.com
PID 476 wrote to memory of 3712	476	cmd.exe	chcp.com
PID 476 wrote to memory of 3712	476	cmd.exe	chcp.com
PID 476 wrote to memory of 544	476	cmd.exe	schtasks.exe
PID 476 wrote to memory of 544	476	cmd.exe	schtasks.exe
PID 476 wrote to memory of 544	476	cmd.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\$TEMP\BroomSetup.exe
"C:\Users\Admin\AppData\Local\Temp\$TEMP\BroomSetup.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:972

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
2⤵
- Suspicious use of WriteProcessMemory
PID:476

C:\Windows\SysWOW64\chcp.com
chcp 1251
3⤵
PID:3712

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\$TEMP\Updater.exe'" /sc minute /mo 30 /F
3⤵
- Creates scheduled task(s)
PID:544

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Temp\Task.bat
Filesize
134B

MD5
fe4c7277dd275839d983fe9e120c320d

SHA1
c42dc104bb9b4a6ed80af7ce99762954116305d7

SHA256
fe6f6d8f8785486a597976f1cc9587618d3ebda7814548182bd41233d8cd31e7

SHA512
29fdb916f5f8a10a53f9bf3c6dfb6bdf73564b9e0a17a52e3c1a9b0457390d259bb0152bc40b7e7fadfa733d282f9c14e00f499a5bcbfe82c2b37eb90de861bf

Download Submit
memory/972-0-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/972-1-0x0000000001010000-0x0000000001011000-memory.dmp

Filesize
4KB

Download
memory/972-5-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/972-7-0x0000000001010000-0x0000000001011000-memory.dmp

Filesize
4KB

Download