c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583

General

Target

c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe
Size

4.4MB
MD5

9631809ff9e66cc5809e51e2929dfbe8
SHA1

4ee1085393d94978fc17b1453517f0aa7f40b8a3
SHA256

c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583
SHA512

3e350e41e7a86756438762c0a6772e5781757bb941e8c88c58238e1f19e15a3eb743301119050b30476d69bc68568a0bad1cdd4560f1ecac2cf4c0c72c9d77d1
SSDEEP

98304:k8sjkFhRWieWT0ywsagZ9VeXD3qJJXg2cMUGZWh:2jyhRPeWvnzwrivWh

Score

9^/10

upx

Malware Config

Signatures

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/files/0x000600000002311b-6.dat	UPX
behavioral2/files/0x000600000002311b-7.dat	UPX
behavioral2/memory/3988-8-0x0000000000400000-0x0000000000623000-memory.dmp	UPX
behavioral2/memory/3988-71-0x0000000000400000-0x0000000000623000-memory.dmp	UPX
behavioral2/memory/3988-72-0x0000000000400000-0x0000000000623000-memory.dmp	UPX

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	WindowsLoader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	WindowsLoader.exe

Executes dropped EXE 1 IoCs

pid	Process
3988	WindowsLoader.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000600000002311b-6.dat	upx
behavioral2/files/0x000600000002311b-7.dat	upx
behavioral2/memory/3988-8-0x0000000000400000-0x0000000000623000-memory.dmp	upx
behavioral2/memory/3988-71-0x0000000000400000-0x0000000000623000-memory.dmp	upx
behavioral2/memory/3988-72-0x0000000000400000-0x0000000000623000-memory.dmp	upx

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

System Information Discovery
T1082

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key created	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	WindowsLoader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BaseBoardProduct	WindowsLoader.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3988	WindowsLoader.exe
3988	WindowsLoader.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	3988	WindowsLoader.exe
Token: SeIncBasePriorityPrivilege	3988	WindowsLoader.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3988	WindowsLoader.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 3988	4736	c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe	85
PID 4736 wrote to memory of 3988	4736	c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe	85
PID 4736 wrote to memory of 3988	4736	c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe	85

C:\Users\Admin\AppData\Local\Temp\c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe
"C:\Users\Admin\AppData\Local\Temp\c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Users\Admin\AppData\Local\Temp\WindowsLoader.exe
  C:\Users\Admin\AppData\Local\Temp\WindowsLoader.exe
  2⤵
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  PID:3988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\WindowsLoader.exe

Filesize
1.1MB

MD5
79d4a58ed07db73f42eb277beb200dbe

SHA1
1df3689c02bf5caceba1f936c7ca0b1804174d23

SHA256
a0c6580700c9b4f3e1ad7c1c5d5bd763a27307d46ee77ab3983e044fc6a12e79

SHA512
3531be9438bce815aa1bfd390ea0bef1ab3f52164f2397ed2a5e63db30d4051fab46b0474f3c64525889c23d014c89076c13451d2d34e467d9733571cce084be

Download Submit
C:\Users\Admin\AppData\Local\Temp\WindowsLoader.exe

Filesize
927KB

MD5
dbee4bbcfa17356924899d6a19dece35

SHA1
fd95aebcc818dabe4d7209a3147486c9ce548633

SHA256
84809cad124f0c30d0d4f4304309c7461c5f60dc8872f370f956844d5b388d4a

SHA512
418cfe62e6a9f640828f02c6e7045910d2baa5a082b9dbd8df76a1ce0b208cb3feb2091dcb7383d18329f71d6e4b8995aa8a7b4ff08742b80da50fae43ca1a92

Download Submit
memory/3988-8-0x0000000000400000-0x0000000000623000-memory.dmp

Filesize
2.1MB

Download
memory/3988-9-0x00000000026A0000-0x0000000002843000-memory.dmp

Filesize
1.6MB

Download
memory/3988-10-0x0000000002BD0000-0x0000000002BE3000-memory.dmp

Filesize
76KB

Download
memory/3988-18-0x0000000002650000-0x0000000002660000-memory.dmp

Filesize
64KB

Download
memory/3988-23-0x0000000002BF0000-0x0000000002C02000-memory.dmp

Filesize
72KB

Download
memory/3988-31-0x0000000010000000-0x0000000010021000-memory.dmp

Filesize
132KB

Download
memory/3988-39-0x0000000002F50000-0x0000000002F61000-memory.dmp

Filesize
68KB

Download
memory/3988-47-0x0000000002F70000-0x0000000002F80000-memory.dmp

Filesize
64KB

Download
memory/3988-63-0x0000000002F90000-0x0000000002FB0000-memory.dmp

Filesize
128KB

Download
memory/3988-55-0x0000000002F80000-0x0000000002F90000-memory.dmp

Filesize
64KB

Download
memory/3988-71-0x0000000000400000-0x0000000000623000-memory.dmp

Filesize
2.1MB

Download
memory/3988-72-0x0000000000400000-0x0000000000623000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads