488385cd54d14790b03fa7c7dc997ebea3f7b2a8499e5927eb437a3791102a77

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-06-2024 12:06

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General

Target

Freshbuild.exe
Size

415KB
MD5

07101cac5b9477ba636cd8ca7b9932cb
SHA1

59ea7fd9ae6ded8c1b7240a4bf9399b4eb3849f1
SHA256

488385cd54d14790b03fa7c7dc997ebea3f7b2a8499e5927eb437a3791102a77
SHA512

02240ff51a74966bc31cfcc901105096eb871f588efaa9be1a829b4ee6f245bd9dca37be7e2946ba6315feea75c3dce5f490847250e62081445cd25b0f406887
SSDEEP

12288:5fSPtGpmLb84Jjzo6yrBuKuJ+ITOC0Ud:UtGpmf8edykhV0Ud

Score

7^/10

Malware Config

Signatures

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

Processes:

Freshbuild.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation Freshbuild.exe
Executes dropped EXE 3 IoCs

Processes:

Hkbsse.exeHkbsse.exeHkbsse.exe

pid process

1816 Hkbsse.exe
2320 Hkbsse.exe
944 Hkbsse.exe
Drops file in Windows directory 1 IoCs

Processes:

Freshbuild.exe

description ioc process

File created C:\Windows\Tasks\Hkbsse.job Freshbuild.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Freshbuild.exe

pid process

5060 Freshbuild.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	Freshbuild.exe

pid	process
1816	Hkbsse.exe
2320	Hkbsse.exe
944	Hkbsse.exe

description	ioc	process
File created	C:\Windows\Tasks\Hkbsse.job	Freshbuild.exe

pid	process
5060	Freshbuild.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Freshbuild.exe

description	pid	process	target process
PID 5060 wrote to memory of 1816	5060	Freshbuild.exe	Hkbsse.exe
PID 5060 wrote to memory of 1816	5060	Freshbuild.exe	Hkbsse.exe
PID 5060 wrote to memory of 1816	5060	Freshbuild.exe	Hkbsse.exe

C:\Users\Admin\AppData\Local\Temp\Freshbuild.exe
"C:\Users\Admin\AppData\Local\Temp\Freshbuild.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:5060

C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
"C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe"
2⤵
- Executes dropped EXE
PID:1816

C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
1⤵
- Executes dropped EXE
PID:2320

C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
1⤵
- Executes dropped EXE
PID:944

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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\Local\Temp\b66a8ae076\Hkbsse.exe
Filesize
415KB

MD5
07101cac5b9477ba636cd8ca7b9932cb

SHA1
59ea7fd9ae6ded8c1b7240a4bf9399b4eb3849f1

SHA256
488385cd54d14790b03fa7c7dc997ebea3f7b2a8499e5927eb437a3791102a77

SHA512
02240ff51a74966bc31cfcc901105096eb871f588efaa9be1a829b4ee6f245bd9dca37be7e2946ba6315feea75c3dce5f490847250e62081445cd25b0f406887

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