guloader | 2320a8a1a00b251e588281e68f1c1a1ab03bc750ff787cb698a865c166d56535

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
17/09/2022, 17:04

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General

Target

payment receipt.exe
Size

114KB
MD5

3fcc05a4ba117e0f0b24c35209acd6ae
SHA1

eeb001753c26710a2c0b235d4fc22f44a8a3661f
SHA256

fbe01e695b2a6b560da2025bc32a0269b9a4b97417ae6982e99c35cd14352ff9
SHA512

2c6c1d36b13f3b79b1f64fe4639cab9011bdac33321d7216fdefe381ab942fd02e656668cf3d0c4119617c1e93fbfecdbb80888a762e18cfbb7857b1013032e4
SSDEEP

3072:STJ4TJdRVDZ6Lt+uQNb2QXt1kWtAf3RqaQMVWRKwoRfZyeDp+8q9:SVGdx6xK2Mtmg2345jcNZpQ

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	payment receipt.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	payment receipt.exe

Loads dropped DLL 1 IoCs

pid	Process
1048	payment receipt.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1048	payment receipt.exe
612	payment receipt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1048 set thread context of 612	1048	payment receipt.exe	27

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

pid	Process
1048	payment receipt.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 612	1048	payment receipt.exe	27
PID 1048 wrote to memory of 612	1048	payment receipt.exe	27
PID 1048 wrote to memory of 612	1048	payment receipt.exe	27
PID 1048 wrote to memory of 612	1048	payment receipt.exe	27
PID 1048 wrote to memory of 612	1048	payment receipt.exe	27

C:\Users\Admin\AppData\Local\Temp\payment receipt.exe
"C:\Users\Admin\AppData\Local\Temp\payment receipt.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:1048
- C:\Users\Admin\AppData\Local\Temp\payment receipt.exe
  "C:\Users\Admin\AppData\Local\Temp\payment receipt.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:612

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

\Users\Admin\AppData\Local\Temp\nso5CD.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/612-64-0x00000000001C0000-0x00000000002C0000-memory.dmp

Filesize
1024KB

Download
memory/612-65-0x0000000077A00000-0x0000000077BA9000-memory.dmp

Filesize
1.7MB

Download
memory/612-71-0x0000000077BE0000-0x0000000077D60000-memory.dmp

Filesize
1.5MB

Download
memory/612-61-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/612-70-0x00000000001C0000-0x00000000002C0000-memory.dmp

Filesize
1024KB

Download
memory/612-68-0x0000000077BE0000-0x0000000077D60000-memory.dmp

Filesize
1.5MB

Download
memory/1048-69-0x0000000077BE0000-0x0000000077D60000-memory.dmp

Filesize
1.5MB

Download
memory/1048-63-0x0000000077BE0000-0x0000000077D60000-memory.dmp

Filesize
1.5MB

Download
memory/1048-56-0x0000000002350000-0x0000000002F9A000-memory.dmp

Filesize
12.3MB

Download
memory/1048-54-0x0000000076171000-0x0000000076173000-memory.dmp

Filesize
8KB

Download
memory/1048-62-0x0000000077BE0000-0x0000000077D60000-memory.dmp

Filesize
1.5MB

Download
memory/1048-57-0x0000000077A00000-0x0000000077BA9000-memory.dmp

Filesize
1.7MB

Download
memory/1048-72-0x0000000002350000-0x0000000002352000-memory.dmp

Filesize
8KB

Download
memory/1048-73-0x0000000077BE0000-0x0000000077D60000-memory.dmp

Filesize
1.5MB

Download