guloader | 114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
10-01-2023 12:23

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General

Target

114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe
Size

1.2MB
MD5

af1396ae6de9b21c65208759f351072c
SHA1

d5d206e5de775ccd65a7fd676491c1723d6439cd
SHA256

114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e
SHA512

639f343b4fdd43d762d7b037a9307dbba3675fd060610e4181cfd192cf06aa92b77116f73bdf5e205804a3ebe75bf99030541090eb583adc206e7eac5a5fcac5
SSDEEP

24576:/utJ4VSJli1SxaG8iP1xlrHJq/O8ixgkjtUqg+LXg17nPQZ7lRNGhs+dZqI/VSkU:5gb2SxwaRrHJiO8ixgkrnLk7CBCZqSVo

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.execaspol.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe

Loads dropped DLL 1 IoCs

Processes:

114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe

pid process

5112 114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.execaspol.exe

pid process

5112 114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe
2024 caspol.exe

pid	process
5112	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe

pid	process
5112	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe
2024	caspol.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe

description	pid	process	target process
PID 5112 set thread context of 2024	5112	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe	caspol.exe

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

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe

pid process

5112 114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe

pid	process
5112	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe

description	pid	process	target process
PID 5112 wrote to memory of 2024	5112	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe	caspol.exe
PID 5112 wrote to memory of 2024	5112	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe	caspol.exe
PID 5112 wrote to memory of 2024	5112	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe	caspol.exe
PID 5112 wrote to memory of 2024	5112	114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe	caspol.exe

C:\Users\Admin\AppData\Local\Temp\114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe
"C:\Users\Admin\AppData\Local\Temp\114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5112
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\caspol.exe
  "C:\Users\Admin\AppData\Local\Temp\114a7efb95ce3d5b35a36781755d02ad1ef8de4620369416ac62580789d1d85e.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:2024

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nst92B1.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/2024-141-0x00007FF8E9F10000-0x00007FF8EA105000-memory.dmp

Filesize
2.0MB

Download
memory/2024-137-0x0000000000000000-mapping.dmp

Download
memory/2024-139-0x0000000001300000-0x0000000001400000-memory.dmp

Filesize
1024KB

Download
memory/2024-140-0x0000000001300000-0x0000000001400000-memory.dmp

Filesize
1024KB

Download
memory/2024-142-0x0000000077080000-0x0000000077223000-memory.dmp

Filesize
1.6MB

Download
memory/2024-143-0x00007FF8E9F10000-0x00007FF8EA105000-memory.dmp

Filesize
2.0MB

Download
memory/2024-144-0x0000000077080000-0x0000000077223000-memory.dmp

Filesize
1.6MB

Download
memory/5112-134-0x0000000004AA0000-0x0000000004BA1000-memory.dmp

Filesize
1.0MB

Download
memory/5112-135-0x00007FF8E9F10000-0x00007FF8EA105000-memory.dmp

Filesize
2.0MB

Download
memory/5112-136-0x0000000077080000-0x0000000077223000-memory.dmp

Filesize
1.6MB

Download
memory/5112-138-0x0000000077080000-0x0000000077223000-memory.dmp

Filesize
1.6MB

Download
memory/5112-133-0x0000000004AA0000-0x0000000004BA1000-memory.dmp

Filesize
1.0MB

Download
memory/5112-145-0x0000000004AA0000-0x0000000004BA1000-memory.dmp

Filesize
1.0MB

Download