488385cd54d14790b03fa7c7dc997ebea3f7b2a8499e5927eb437a3791102a77

Analysis

max time kernel
145s
max time network
138s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-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

8^/10

Malware Config

Signatures

Downloads MZ/PE file
Executes dropped EXE 4 IoCs

Processes:

Hkbsse.exe1.exeHkbsse.exeHkbsse.exe

pid process

4700 Hkbsse.exe
4956 1.exe
4208 Hkbsse.exe
748 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
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3328 4956 WerFault.exe 1.exe

pid	process
4700	Hkbsse.exe
4956	1.exe
4208	Hkbsse.exe
748	Hkbsse.exe

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

pid	pid_target	process	target process
3328	4956	WerFault.exe	1.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

1.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	1.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Freshbuild.exeHkbsse.exe

description	pid	process	target process
PID 2912 wrote to memory of 4700	2912	Freshbuild.exe	Hkbsse.exe
PID 2912 wrote to memory of 4700	2912	Freshbuild.exe	Hkbsse.exe
PID 2912 wrote to memory of 4700	2912	Freshbuild.exe	Hkbsse.exe
PID 4700 wrote to memory of 4956	4700	Hkbsse.exe	1.exe
PID 4700 wrote to memory of 4956	4700	Hkbsse.exe	1.exe
PID 4700 wrote to memory of 4956	4700	Hkbsse.exe	1.exe

C:\Users\Admin\AppData\Local\Temp\Freshbuild.exe
"C:\Users\Admin\AppData\Local\Temp\Freshbuild.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2912

C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
"C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4700

C:\Users\Admin\AppData\Local\Temp\1000026001\1.exe
"C:\Users\Admin\AppData\Local\Temp\1000026001\1.exe"
3⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
PID:4956

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4956 -s 492
4⤵
- Program crash
PID:3328

C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
1⤵
- Executes dropped EXE
PID:4208

C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
1⤵
- Executes dropped EXE
PID:748

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Query Registry

T1012

Peripheral Device Discovery

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\1000026001\1.exe
Filesize
210KB

MD5
4e44bde7f6f84e7ce196f0e50c1e7f92

SHA1
eaeef05bdb27936123080a9f7d40f463676be208

SHA256
19cd5aee7659c7f0acede05ea290754cc649e72929f66b9c6903fa2c8da0d1cd

SHA512
06f9ca3d6c6a928a586f5b09c5cfe13c5348c45dbbb047da7fb60caf8a6b710ec3dfd5854b3e1a29b777cca2c573b261f7716edbc5d495b56542d014e4715b14

Download Submit
C:\Users\Admin\AppData\Local\Temp\b66a8ae076\Hkbsse.exe
Filesize
415KB

MD5
07101cac5b9477ba636cd8ca7b9932cb

SHA1
59ea7fd9ae6ded8c1b7240a4bf9399b4eb3849f1

SHA256
488385cd54d14790b03fa7c7dc997ebea3f7b2a8499e5927eb437a3791102a77

SHA512
02240ff51a74966bc31cfcc901105096eb871f588efaa9be1a829b4ee6f245bd9dca37be7e2946ba6315feea75c3dce5f490847250e62081445cd25b0f406887

Download Submit
memory/4956-32-0x0000000000400000-0x0000000002BEE000-memory.dmp

Filesize
39.9MB

Download