smokeloader | ceeb7b4c98464f0429796c743d1c78e2d18c331c4e7c87448440726b7531e1d1

Analysis

max time kernel
150s
max time network
126s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
21/07/2023, 06:00

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General

Target

RFQ# RE-2301707.xls
Size

1.2MB
MD5

b9b21e99991c542b6c2298548c004f28
SHA1

09ab1bbc0baff1fee59e5409303297d9d2e80c47
SHA256

ceeb7b4c98464f0429796c743d1c78e2d18c331c4e7c87448440726b7531e1d1
SHA512

a9693452c08a496ec9063500d328d0772b45fc4b688557497593cda36cc291d760b70af3fce5b308d73ecc227f0ae0408365b3177e3185337624c2e226028713
SSDEEP

24576:90nKZyUw6Vtln+Zykw6VINX0wI6XiHP5n2wyL/gGD1p3H:90U06Vtlok6V+X35iPdxe/gON

Score

10^/10

smokeloader backdoor trojan

Malware Config

Extracted

Family

smokeloader

Version

2022

http://cletonmy.com/

http://alpatrik.com/

rc4.i32

Signatures

SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	2888	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
3024	IBM_Linux.exe

Loads dropped DLL 4 IoCs

pid	Process
2888	EQNEDT32.EXE
3024	IBM_Linux.exe
3024	IBM_Linux.exe
1972	IBM_Linux.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1972	IBM_Linux.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3024	IBM_Linux.exe
1972	IBM_Linux.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3024 set thread context of 1972	3024	IBM_Linux.exe	33

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/0x000500000001944f-67.dat	nsis_installer_1
behavioral1/files/0x000500000001944f-67.dat	nsis_installer_2
behavioral1/files/0x000500000001944f-68.dat	nsis_installer_1
behavioral1/files/0x000500000001944f-68.dat	nsis_installer_2
behavioral1/files/0x000500000001944f-71.dat	nsis_installer_1
behavioral1/files/0x000500000001944f-71.dat	nsis_installer_2
behavioral1/files/0x000500000001944f-72.dat	nsis_installer_1
behavioral1/files/0x000500000001944f-72.dat	nsis_installer_2
behavioral1/files/0x000500000001944f-84.dat	nsis_installer_1
behavioral1/files/0x000500000001944f-84.dat	nsis_installer_2
behavioral1/files/0x000500000001944f-86.dat	nsis_installer_1
behavioral1/files/0x000500000001944f-86.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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	IBM_Linux.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	IBM_Linux.exe
Key enumerated	\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
2888	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2592	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1972	IBM_Linux.exe
1972	IBM_Linux.exe
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
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1180	Process not Found
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1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found
1180	Process not Found

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1180	Process not Found

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
3024	IBM_Linux.exe
1972	IBM_Linux.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1180	Process not Found
Token: SeShutdownPrivilege	1180	Process not Found

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
2592	EXCEL.EXE
2592	EXCEL.EXE
2592	EXCEL.EXE
2592	EXCEL.EXE
2592	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2888 wrote to memory of 3024	2888	EQNEDT32.EXE	29
PID 2888 wrote to memory of 3024	2888	EQNEDT32.EXE	29
PID 2888 wrote to memory of 3024	2888	EQNEDT32.EXE	29
PID 2888 wrote to memory of 3024	2888	EQNEDT32.EXE	29
PID 3024 wrote to memory of 1972	3024	IBM_Linux.exe	33
PID 3024 wrote to memory of 1972	3024	IBM_Linux.exe	33
PID 3024 wrote to memory of 1972	3024	IBM_Linux.exe	33
PID 3024 wrote to memory of 1972	3024	IBM_Linux.exe	33
PID 3024 wrote to memory of 1972	3024	IBM_Linux.exe	33

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\RFQ# RE-2301707.xls"
1⤵
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2592

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:2888
- 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:3024
- - 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:1972

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.MSO\E821A7AE.emf

Filesize
1.4MB

MD5
a01b9617553432807b9b58025b338d97

SHA1
439bdcc450408b9735b2428c2d53d2e6977fa58c

SHA256
7a0426ed2e2349916969ff7087c0f76089fb8ce7f4627f3d11ccbc1aaefcedce

SHA512
312cc2563fa865d6a939fea85a520627c73ed9a95bafc98c89495f21d535dc658825be74b64f0f5c5815d1d234fc6e77a71779247e4973e39ba8dccec2f09bee

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

Filesize
395KB

MD5
dede170df1b43a3d2e0095af1e16f7d5

SHA1
da3732c14024ea58bff773c7a2f5317c83041920

SHA256
30fecff47896754fe3c4fe3c748827d98f1ea1d5c0654bb229f7784e3521f148

SHA512
dd7816592feb25c2881760652ad03393f20856186091cb187107339ad74e682af348b3edaf0b792417b6ef4099e08060ed7aeff1d082ab36c73d3000bea3b15e

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

Filesize
395KB

MD5
dede170df1b43a3d2e0095af1e16f7d5

SHA1
da3732c14024ea58bff773c7a2f5317c83041920

SHA256
30fecff47896754fe3c4fe3c748827d98f1ea1d5c0654bb229f7784e3521f148

SHA512
dd7816592feb25c2881760652ad03393f20856186091cb187107339ad74e682af348b3edaf0b792417b6ef4099e08060ed7aeff1d082ab36c73d3000bea3b15e

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

Filesize
395KB

MD5
dede170df1b43a3d2e0095af1e16f7d5

SHA1
da3732c14024ea58bff773c7a2f5317c83041920

SHA256
30fecff47896754fe3c4fe3c748827d98f1ea1d5c0654bb229f7784e3521f148

SHA512
dd7816592feb25c2881760652ad03393f20856186091cb187107339ad74e682af348b3edaf0b792417b6ef4099e08060ed7aeff1d082ab36c73d3000bea3b15e

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

Filesize
395KB

MD5
dede170df1b43a3d2e0095af1e16f7d5

SHA1
da3732c14024ea58bff773c7a2f5317c83041920

SHA256
30fecff47896754fe3c4fe3c748827d98f1ea1d5c0654bb229f7784e3521f148

SHA512
dd7816592feb25c2881760652ad03393f20856186091cb187107339ad74e682af348b3edaf0b792417b6ef4099e08060ed7aeff1d082ab36c73d3000bea3b15e

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

Filesize
395KB

MD5
dede170df1b43a3d2e0095af1e16f7d5

SHA1
da3732c14024ea58bff773c7a2f5317c83041920

SHA256
30fecff47896754fe3c4fe3c748827d98f1ea1d5c0654bb229f7784e3521f148

SHA512
dd7816592feb25c2881760652ad03393f20856186091cb187107339ad74e682af348b3edaf0b792417b6ef4099e08060ed7aeff1d082ab36c73d3000bea3b15e

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

Filesize
395KB

MD5
dede170df1b43a3d2e0095af1e16f7d5

SHA1
da3732c14024ea58bff773c7a2f5317c83041920

SHA256
30fecff47896754fe3c4fe3c748827d98f1ea1d5c0654bb229f7784e3521f148

SHA512
dd7816592feb25c2881760652ad03393f20856186091cb187107339ad74e682af348b3edaf0b792417b6ef4099e08060ed7aeff1d082ab36c73d3000bea3b15e

Download Submit
\Users\Admin\AppData\Local\Temp\nst9945.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
memory/1180-95-0x0000000002BA0000-0x0000000002BB6000-memory.dmp

Filesize
88KB

Download
memory/1972-96-0x0000000001470000-0x0000000006FBD000-memory.dmp

Filesize
91.3MB

Download
memory/1972-92-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1972-99-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1972-90-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1972-87-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1972-88-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1972-91-0x0000000001470000-0x0000000006FBD000-memory.dmp

Filesize
91.3MB

Download
memory/1972-89-0x00000000773E0000-0x0000000077589000-memory.dmp

Filesize
1.7MB

Download
memory/2592-81-0x00000000737DD000-0x00000000737E8000-memory.dmp

Filesize
44KB

Download
memory/2592-55-0x00000000737DD000-0x00000000737E8000-memory.dmp

Filesize
44KB

Download
memory/2592-54-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2592-110-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2592-125-0x00000000737DD000-0x00000000737E8000-memory.dmp

Filesize
44KB

Download
memory/3024-83-0x00000000775D0000-0x00000000776A6000-memory.dmp

Filesize
856KB

Download
memory/3024-82-0x00000000773E0000-0x0000000077589000-memory.dmp

Filesize
1.7MB

Download
memory/3024-85-0x000000006CBE0000-0x000000006CBE6000-memory.dmp

Filesize
24KB

Download