guloader | 61878427cd1d8ae10265dc16cfa10444838db931e19429339fb5b7f44add7db4

General

Target

78092b8a72d068f981f3db3edd29ac6b.exe
Size

955KB
MD5

78092b8a72d068f981f3db3edd29ac6b
SHA1

55b22dbfb28a63564b4f5d227e1ddfc144119846
SHA256

61878427cd1d8ae10265dc16cfa10444838db931e19429339fb5b7f44add7db4
SHA512

67d19190f7203140280a3fdeeb8d4ea0a511e8fa8449e320f67d0f589ff5bb4fda7c23171449b66698115b07e0ec00e73dc872809287ccc133cf0c5fe41f31ae
SSDEEP

24576:YuHL2plae9FplbpCsVQB2Qz8kSSyIrKcMB:telaeznVev8kJrKc2

Score

10^/10

guloader downloader persistence

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:

78092b8a72d068f981f3db3edd29ac6b.exeieinstal.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	78092b8a72d068f981f3db3edd29ac6b.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ieinstal.exe

Loads dropped DLL 1 IoCs

Processes:

78092b8a72d068f981f3db3edd29ac6b.exe

pid process

2016 78092b8a72d068f981f3db3edd29ac6b.exe

pid	process
2016	78092b8a72d068f981f3db3edd29ac6b.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ieinstal.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	ieinstal.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Sabbatic = "C:\\Users\\Admin\\AppData\\Roaming\\Nontautomeric\\Anaphylatoxin141.exe"	ieinstal.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

ieinstal.exe

pid process

1080 ieinstal.exe
1080 ieinstal.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

78092b8a72d068f981f3db3edd29ac6b.exeieinstal.exe

pid process

2016 78092b8a72d068f981f3db3edd29ac6b.exe
1080 ieinstal.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

78092b8a72d068f981f3db3edd29ac6b.exe

description pid process target process

PID 2016 set thread context of 1080 2016 78092b8a72d068f981f3db3edd29ac6b.exe ieinstal.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:

78092b8a72d068f981f3db3edd29ac6b.exe

pid process

2016 78092b8a72d068f981f3db3edd29ac6b.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ieinstal.exe

pid process

1080 ieinstal.exe

pid	process
1080	ieinstal.exe
1080	ieinstal.exe

pid	process
2016	78092b8a72d068f981f3db3edd29ac6b.exe
1080	ieinstal.exe

description	pid	process	target process
PID 2016 set thread context of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe

pid	process
2016	78092b8a72d068f981f3db3edd29ac6b.exe

pid	process
1080	ieinstal.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

78092b8a72d068f981f3db3edd29ac6b.exe

description	pid	process	target process
PID 2016 wrote to memory of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe
PID 2016 wrote to memory of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe
PID 2016 wrote to memory of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe
PID 2016 wrote to memory of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe
PID 2016 wrote to memory of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe
PID 2016 wrote to memory of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe
PID 2016 wrote to memory of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe
PID 2016 wrote to memory of 1080	2016	78092b8a72d068f981f3db3edd29ac6b.exe	ieinstal.exe

C:\Users\Admin\AppData\Local\Temp\78092b8a72d068f981f3db3edd29ac6b.exe
"C:\Users\Admin\AppData\Local\Temp\78092b8a72d068f981f3db3edd29ac6b.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:2016
- C:\Program Files (x86)\internet explorer\ieinstal.exe
  "C:\Users\Admin\AppData\Local\Temp\78092b8a72d068f981f3db3edd29ac6b.exe"
  2⤵
  - Checks QEMU agent file
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetWindowsHookEx
  PID:1080

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Web Service

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nstF3A6.tmp\System.dll

Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

Download Submit
memory/1080-60-0x0000000000620000-0x0000000002704000-memory.dmp

Filesize
32.9MB

Download
memory/1080-61-0x0000000001E14E5D-mapping.dmp

Download
memory/1080-68-0x0000000077790000-0x0000000077939000-memory.dmp

Filesize
1.7MB

Download
memory/1080-69-0x0000000077970000-0x0000000077AF0000-memory.dmp

Filesize
1.5MB

Download
memory/1080-70-0x0000000000620000-0x0000000002704000-memory.dmp

Filesize
32.9MB

Download
memory/2016-54-0x00000000757A1000-0x00000000757A3000-memory.dmp

Filesize
8KB

Download
memory/2016-56-0x0000000003F40000-0x0000000006024000-memory.dmp

Filesize
32.9MB

Download
memory/2016-57-0x0000000003F40000-0x0000000006024000-memory.dmp

Filesize
32.9MB

Download
memory/2016-62-0x0000000077790000-0x0000000077939000-memory.dmp

Filesize
1.7MB

Download
memory/2016-63-0x0000000077970000-0x0000000077AF0000-memory.dmp

Filesize
1.5MB

Download
memory/2016-71-0x0000000077970000-0x0000000077AF0000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads