guloader | 5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5

Analysis

max time kernel
147s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25/09/2024, 07:12

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General

Target

UMOWA_PD.BAT.exe
Size

553KB
MD5

d1f841d041c915f803dbe6c15b19c510
SHA1

85190628be4d7ed332737df38a580455e29155e1
SHA256

5af56bd9193c8379584ced6a37121e011007666ef1d77518e3e5ea52ec2ca7c5
SHA512

d8a06b312a5f5f6f37e46bee7c360eb32397be08af636699ba5babca7ff61c651fa950093a410eab21ad854012ad765a803735a5c39c1dab39a4aecf6ae107ac
SSDEEP

12288:qX6pZB10nk2cxhmCVvEIM/XHgeewr+Nc20PJbbiEUW34/:qX6pZ+jMh3EIM/LPBqEUW

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 1 IoCs

pid	Process
3064	UMOWA_PD.BAT.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\hulas.flo	UMOWA_PD.BAT.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3064	UMOWA_PD.BAT.exe
2820	UMOWA_PD.BAT.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3064 set thread context of 2820	3064	UMOWA_PD.BAT.exe	30

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	UMOWA_PD.BAT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	UMOWA_PD.BAT.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3064	UMOWA_PD.BAT.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 2820	3064	UMOWA_PD.BAT.exe	30
PID 3064 wrote to memory of 2820	3064	UMOWA_PD.BAT.exe	30
PID 3064 wrote to memory of 2820	3064	UMOWA_PD.BAT.exe	30
PID 3064 wrote to memory of 2820	3064	UMOWA_PD.BAT.exe	30
PID 3064 wrote to memory of 2820	3064	UMOWA_PD.BAT.exe	30
PID 3064 wrote to memory of 2820	3064	UMOWA_PD.BAT.exe	30

C:\Users\Admin\AppData\Local\Temp\UMOWA_PD.BAT.exe
"C:\Users\Admin\AppData\Local\Temp\UMOWA_PD.BAT.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\Temp\UMOWA_PD.BAT.exe
  "C:\Users\Admin\AppData\Local\Temp\UMOWA_PD.BAT.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2820

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsy198.tmp\System.dll

Filesize
12KB

MD5
4add245d4ba34b04f213409bfe504c07

SHA1
ef756d6581d70e87d58cc4982e3f4d18e0ea5b09

SHA256
9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706

SHA512
1bd260cabe5ea3cefbbc675162f30092ab157893510f45a1b571489e03ebb2903c55f64f89812754d3fe03c8f10012b8078d1261a7e73ac1f87c82f714bce03d

Download Submit
memory/2820-17-0x0000000001470000-0x000000000352C000-memory.dmp

Filesize
32.7MB

Download
memory/2820-18-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2820-19-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/3064-13-0x0000000004060000-0x000000000611C000-memory.dmp

Filesize
32.7MB

Download
memory/3064-14-0x00000000771C1000-0x00000000772C2000-memory.dmp

Filesize
1.0MB

Download
memory/3064-15-0x0000000004060000-0x000000000611C000-memory.dmp

Filesize
32.7MB

Download
memory/3064-16-0x00000000771C0000-0x0000000077369000-memory.dmp

Filesize
1.7MB

Download
memory/3064-31-0x0000000004060000-0x000000000611C000-memory.dmp

Filesize
32.7MB

Download