guloader | 52424464d6caddf99763a3afff654a51604abf89ab0e4d8df656bc6e21528bf2

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
16/08/2023, 13:35

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General

Target

Erstatningssprgsmaalene.exe
Size

569KB
MD5

441f580a20127b9fc7b674209bfcea31
SHA1

48ee7b2e8265cdb7f9bd3fd3c62915d82e4494ab
SHA256

52424464d6caddf99763a3afff654a51604abf89ab0e4d8df656bc6e21528bf2
SHA512

6f3784218bbee4cc9cfefb77c1970bc82617b2aa6082316cfced38e2600084fa1ca593bf02fdb13a9045211e863e086c5f094f9bfb54241050e042d8c2d9682b
SSDEEP

6144:dZ/qRr6PRb3dOEP2KtbRyu7tnWiEHyekMNpVlLwseBI5AUBExksKcDTUaEne0oj:dBXPB4M2KDyu8/FflL2IqboPaV0g

Score

10^/10

guloader 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

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	Erstatningssprgsmaalene.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	Erstatningssprgsmaalene.exe

Loads dropped DLL 1 IoCs

pid	Process
4852	Erstatningssprgsmaalene.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4528	Erstatningssprgsmaalene.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4852	Erstatningssprgsmaalene.exe
4528	Erstatningssprgsmaalene.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4852 set thread context of 4528	4852	Erstatningssprgsmaalene.exe	91

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4852	Erstatningssprgsmaalene.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4852 wrote to memory of 4528	4852	Erstatningssprgsmaalene.exe	91
PID 4852 wrote to memory of 4528	4852	Erstatningssprgsmaalene.exe	91
PID 4852 wrote to memory of 4528	4852	Erstatningssprgsmaalene.exe	91
PID 4852 wrote to memory of 4528	4852	Erstatningssprgsmaalene.exe	91
PID 4852 wrote to memory of 4528	4852	Erstatningssprgsmaalene.exe	91

C:\Users\Admin\AppData\Local\Temp\Erstatningssprgsmaalene.exe
"C:\Users\Admin\AppData\Local\Temp\Erstatningssprgsmaalene.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:4852
- C:\Users\Admin\AppData\Local\Temp\Erstatningssprgsmaalene.exe
  "C:\Users\Admin\AppData\Local\Temp\Erstatningssprgsmaalene.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:4528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsiB44D.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/4528-148-0x00000000778E8000-0x00000000778E9000-memory.dmp

Filesize
4KB

Download
memory/4528-147-0x0000000077861000-0x0000000077981000-memory.dmp

Filesize
1.1MB

Download
memory/4528-166-0x0000000077861000-0x0000000077981000-memory.dmp

Filesize
1.1MB

Download
memory/4528-165-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4528-144-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4528-145-0x0000000001660000-0x0000000004372000-memory.dmp

Filesize
45.1MB

Download
memory/4528-146-0x0000000001660000-0x0000000004372000-memory.dmp

Filesize
45.1MB

Download
memory/4528-163-0x0000000001660000-0x0000000004372000-memory.dmp

Filesize
45.1MB

Download
memory/4528-162-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4528-149-0x0000000077905000-0x0000000077906000-memory.dmp

Filesize
4KB

Download
memory/4852-140-0x0000000003140000-0x0000000005E52000-memory.dmp

Filesize
45.1MB

Download
memory/4852-141-0x0000000003140000-0x0000000005E52000-memory.dmp

Filesize
45.1MB

Download
memory/4852-143-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/4852-142-0x0000000077861000-0x0000000077981000-memory.dmp

Filesize
1.1MB

Download