guloader | 2e059934c1f6786fa0108c8cad6e7a7aff078f99c2787aa1d2cfc16ff691d45d

Analysis

max time kernel
150s
max time network
123s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
24/07/2023, 06:00

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

purchase order 3937464494.xls
Size

1.4MB
MD5

383d883be15a9b3f35ce3efe475bef39
SHA1

0052a54d7b51e281b7aa61ab32621d05cb922166
SHA256

2e059934c1f6786fa0108c8cad6e7a7aff078f99c2787aa1d2cfc16ff691d45d
SHA512

b682419caae59a97d6fc99bf3615ad8e0c32f14f93102e98df7f3b2cc7f7930f3cbe76c7d28ffedd0a022aa4438b369db89322231b37bdeaedf4845cf5688572
SSDEEP

24576:EMu9VNZylw6VQOZynw6VqViNhuuvvtw3oqVUbXQwNgZffsLMy5wXx:EMuPR6VQYP6VCiNhv3tcMXXNhLr5s

Score

10^/10

guloader smokeloader backdoor downloader trojan

Malware Config

Extracted

Family

smokeloader

Version

2022

http://cletonmy.com/

http://alpatrik.com/

rc4.i32

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	2208	EQNEDT32.EXE

Downloads MZ/PE file

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

Executes dropped EXE 1 IoCs

pid	Process
652	IBM_Linux.exe

Loads dropped DLL 4 IoCs

pid	Process
2208	EQNEDT32.EXE
652	IBM_Linux.exe
652	IBM_Linux.exe
2248	IBM_Linux.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2248	IBM_Linux.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
652	IBM_Linux.exe
2248	IBM_Linux.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 652 set thread context of 2248	652	IBM_Linux.exe	31

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

System Information Discovery
T1082

NSIS installer 12 IoCs

installer

resource	yara_rule
behavioral1/files/0x0006000000016d23-66.dat	nsis_installer_1
behavioral1/files/0x0006000000016d23-66.dat	nsis_installer_2
behavioral1/files/0x0006000000016d23-67.dat	nsis_installer_1
behavioral1/files/0x0006000000016d23-67.dat	nsis_installer_2
behavioral1/files/0x0006000000016d23-70.dat	nsis_installer_1
behavioral1/files/0x0006000000016d23-70.dat	nsis_installer_2
behavioral1/files/0x0006000000016d23-71.dat	nsis_installer_1
behavioral1/files/0x0006000000016d23-71.dat	nsis_installer_2
behavioral1/files/0x0006000000016d23-85.dat	nsis_installer_1
behavioral1/files/0x0006000000016d23-85.dat	nsis_installer_2
behavioral1/files/0x0006000000016d23-87.dat	nsis_installer_1
behavioral1/files/0x0006000000016d23-87.dat	nsis_installer_2

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	IBM_Linux.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	IBM_Linux.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	IBM_Linux.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2208	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2516	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2248	IBM_Linux.exe
2248	IBM_Linux.exe
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found
1292	Process not Found

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1292	Process not Found

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
652	IBM_Linux.exe
2248	IBM_Linux.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1292	Process not Found

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
2516	EXCEL.EXE
2516	EXCEL.EXE
2516	EXCEL.EXE
2516	EXCEL.EXE
2516	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 652	2208	EQNEDT32.EXE	29
PID 2208 wrote to memory of 652	2208	EQNEDT32.EXE	29
PID 2208 wrote to memory of 652	2208	EQNEDT32.EXE	29
PID 2208 wrote to memory of 652	2208	EQNEDT32.EXE	29
PID 652 wrote to memory of 2248	652	IBM_Linux.exe	31
PID 652 wrote to memory of 2248	652	IBM_Linux.exe	31
PID 652 wrote to memory of 2248	652	IBM_Linux.exe	31
PID 652 wrote to memory of 2248	652	IBM_Linux.exe	31
PID 652 wrote to memory of 2248	652	IBM_Linux.exe	31

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\purchase order 3937464494.xls"
1⤵
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2516

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Users\Admin\AppData\Local\Temp\IBM_Linux.exe
  "C:\Users\Admin\AppData\Local\Temp\IBM_Linux.exe"
  2⤵
  - Checks QEMU agent file
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:652
- - C:\Users\Admin\AppData\Local\Temp\IBM_Linux.exe
    "C:\Users\Admin\AppData\Local\Temp\IBM_Linux.exe"
    3⤵
    - Checks QEMU agent file
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Checks SCSI registry key(s)
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    PID:2248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Exploitation for Client Execution

T1203

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.MSO\BA9FE535.emf

Filesize
1.4MB

MD5
a01b9617553432807b9b58025b338d97

SHA1
439bdcc450408b9735b2428c2d53d2e6977fa58c

SHA256
7a0426ed2e2349916969ff7087c0f76089fb8ce7f4627f3d11ccbc1aaefcedce

SHA512
312cc2563fa865d6a939fea85a520627c73ed9a95bafc98c89495f21d535dc658825be74b64f0f5c5815d1d234fc6e77a71779247e4973e39ba8dccec2f09bee

Download Submit
C:\Users\Admin\AppData\Local\Temp\IBM_Linux.exe

Filesize
249KB

MD5
10d7cfe140b1d9812d8eba062e608256

SHA1
990b9fd71b0867db5bce972e4b79bb67234122aa

SHA256
c862a9f00f17344698bdcab4fe7465b1206382c3c77407507d79e895629f4aea

SHA512
32412bffa88504119d6f8ccb3e5ca21e62e43a1c0ffe18f2e921ddac47db0996edd5590b8f57f8f8eef71817bf6a2f6e7ab942a8045500b2cf858adabcd70ba7

Download Submit
C:\Users\Admin\AppData\Local\Temp\IBM_Linux.exe

Filesize
249KB

MD5
10d7cfe140b1d9812d8eba062e608256

SHA1
990b9fd71b0867db5bce972e4b79bb67234122aa

SHA256
c862a9f00f17344698bdcab4fe7465b1206382c3c77407507d79e895629f4aea

SHA512
32412bffa88504119d6f8ccb3e5ca21e62e43a1c0ffe18f2e921ddac47db0996edd5590b8f57f8f8eef71817bf6a2f6e7ab942a8045500b2cf858adabcd70ba7

Download Submit
C:\Users\Admin\AppData\Local\Temp\IBM_Linux.exe

Filesize
249KB

MD5
10d7cfe140b1d9812d8eba062e608256

SHA1
990b9fd71b0867db5bce972e4b79bb67234122aa

SHA256
c862a9f00f17344698bdcab4fe7465b1206382c3c77407507d79e895629f4aea

SHA512
32412bffa88504119d6f8ccb3e5ca21e62e43a1c0ffe18f2e921ddac47db0996edd5590b8f57f8f8eef71817bf6a2f6e7ab942a8045500b2cf858adabcd70ba7

Download Submit
C:\Users\Admin\AppData\Local\Temp\IBM_Linux.exe

Filesize
249KB

MD5
10d7cfe140b1d9812d8eba062e608256

SHA1
990b9fd71b0867db5bce972e4b79bb67234122aa

SHA256
c862a9f00f17344698bdcab4fe7465b1206382c3c77407507d79e895629f4aea

SHA512
32412bffa88504119d6f8ccb3e5ca21e62e43a1c0ffe18f2e921ddac47db0996edd5590b8f57f8f8eef71817bf6a2f6e7ab942a8045500b2cf858adabcd70ba7

Download Submit
\Users\Admin\AppData\Local\Temp\IBM_Linux.exe

Filesize
249KB

MD5
10d7cfe140b1d9812d8eba062e608256

SHA1
990b9fd71b0867db5bce972e4b79bb67234122aa

SHA256
c862a9f00f17344698bdcab4fe7465b1206382c3c77407507d79e895629f4aea

SHA512
32412bffa88504119d6f8ccb3e5ca21e62e43a1c0ffe18f2e921ddac47db0996edd5590b8f57f8f8eef71817bf6a2f6e7ab942a8045500b2cf858adabcd70ba7

Download Submit
\Users\Admin\AppData\Local\Temp\IBM_Linux.exe

Filesize
249KB

MD5
10d7cfe140b1d9812d8eba062e608256

SHA1
990b9fd71b0867db5bce972e4b79bb67234122aa

SHA256
c862a9f00f17344698bdcab4fe7465b1206382c3c77407507d79e895629f4aea

SHA512
32412bffa88504119d6f8ccb3e5ca21e62e43a1c0ffe18f2e921ddac47db0996edd5590b8f57f8f8eef71817bf6a2f6e7ab942a8045500b2cf858adabcd70ba7

Download Submit
\Users\Admin\AppData\Local\Temp\nsd8DEF.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
memory/652-80-0x00000000036C0000-0x00000000049A3000-memory.dmp

Filesize
18.9MB

Download
memory/652-82-0x00000000036C0000-0x00000000049A3000-memory.dmp

Filesize
18.9MB

Download
memory/652-83-0x0000000077B10000-0x0000000077CB9000-memory.dmp

Filesize
1.7MB

Download
memory/652-84-0x0000000077D00000-0x0000000077DD6000-memory.dmp

Filesize
856KB

Download
memory/652-86-0x000000006D190000-0x000000006D196000-memory.dmp

Filesize
24KB

Download
memory/1292-96-0x0000000002650000-0x0000000002666000-memory.dmp

Filesize
88KB

Download
memory/2248-90-0x0000000077B10000-0x0000000077CB9000-memory.dmp

Filesize
1.7MB

Download
memory/2248-94-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2248-89-0x0000000001470000-0x0000000002753000-memory.dmp

Filesize
18.9MB

Download
memory/2248-100-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2248-91-0x0000000001470000-0x0000000002753000-memory.dmp

Filesize
18.9MB

Download
memory/2248-92-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2248-93-0x0000000001470000-0x0000000002753000-memory.dmp

Filesize
18.9MB

Download
memory/2248-88-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2248-97-0x0000000001470000-0x0000000002753000-memory.dmp

Filesize
18.9MB

Download
memory/2516-81-0x0000000073F0D000-0x0000000073F18000-memory.dmp

Filesize
44KB

Download
memory/2516-54-0x0000000073F0D000-0x0000000073F18000-memory.dmp

Filesize
44KB

Download
memory/2516-53-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2516-110-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2516-125-0x0000000073F0D000-0x0000000073F18000-memory.dmp

Filesize
44KB

Download