smokeloader | cea5245bab036b03f89d549c71f47df8a14854b0de515643bf95319ec5af71d4

Analysis

max time kernel
300s
max time network
121s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
13/11/2023, 12:49

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General

Target

toolspub2.exe
Size

264KB
MD5

dcbd05276d11111f2dd2a7edf52e3386
SHA1

f5dc6d418d9fb2d2cfa4af440ec4ff78da8f11ec
SHA256

cea5245bab036b03f89d549c71f47df8a14854b0de515643bf95319ec5af71d4
SHA512

5f1a9c993cd5394e23b39c43cc7479355c922d1ee8ea48109bbad805209dee697e20759257eca9e2f1b75d34a8c4b4c428a736fa8a468dc18de6c44cb6394846
SSDEEP

3072:MkULcl5ZxKJo8LwzbXyTi4UDcVpdLdKHJPOCv09I3i+9P7HbMsoOz1:LUa5p/bXyTi4iGTdAJ7pf0sv

Score

10^/10

smokeloader up3 backdoor trojan

Malware Config

Extracted

Family

smokeloader

Botnet

up3

Extracted

Family

smokeloader

Version

2020

http://host-file-host6.com/

http://host-host-file8.com/

rc4.i32

Signatures

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

Deletes itself 1 IoCs

pid	Process
1204	Process not Found

Executes dropped EXE 2 IoCs

pid	Process
2792	gvhsstr
2540	gvhsstr

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1724 set thread context of 2924	1724	toolspub2.exe	28
PID 2792 set thread context of 2540	2792	gvhsstr	33

Checks SCSI registry key(s) 3 TTPs 6 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	toolspub2.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	toolspub2.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	toolspub2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	gvhsstr
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	gvhsstr
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	gvhsstr

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2924	toolspub2.exe
2924	toolspub2.exe
1204	Process not Found
1204	Process not Found
1204	Process not Found
1204	Process not Found
1204	Process not Found
1204	Process not Found
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1204	Process not Found
1204	Process not Found
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1204	Process not Found
1204	Process not Found

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1204	Process not Found

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2924	toolspub2.exe
2540	gvhsstr

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1204	Process not Found

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1204	Process not Found
1204	Process not Found

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1204	Process not Found
1204	Process not Found

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 2924	1724	toolspub2.exe	28
PID 1724 wrote to memory of 2924	1724	toolspub2.exe	28
PID 1724 wrote to memory of 2924	1724	toolspub2.exe	28
PID 1724 wrote to memory of 2924	1724	toolspub2.exe	28
PID 1724 wrote to memory of 2924	1724	toolspub2.exe	28
PID 1724 wrote to memory of 2924	1724	toolspub2.exe	28
PID 1724 wrote to memory of 2924	1724	toolspub2.exe	28
PID 2656 wrote to memory of 2792	2656	taskeng.exe	32
PID 2656 wrote to memory of 2792	2656	taskeng.exe	32
PID 2656 wrote to memory of 2792	2656	taskeng.exe	32
PID 2656 wrote to memory of 2792	2656	taskeng.exe	32
PID 2792 wrote to memory of 2540	2792	gvhsstr	33
PID 2792 wrote to memory of 2540	2792	gvhsstr	33
PID 2792 wrote to memory of 2540	2792	gvhsstr	33
PID 2792 wrote to memory of 2540	2792	gvhsstr	33
PID 2792 wrote to memory of 2540	2792	gvhsstr	33
PID 2792 wrote to memory of 2540	2792	gvhsstr	33
PID 2792 wrote to memory of 2540	2792	gvhsstr	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:\Users\Admin\AppData\Local\Temp\toolspub2.exe
"C:\Users\Admin\AppData\Local\Temp\toolspub2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Users\Admin\AppData\Local\Temp\toolspub2.exe
  "C:\Users\Admin\AppData\Local\Temp\toolspub2.exe"
  2⤵
  - Checks SCSI registry key(s)
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:2924

C:\Windows\system32\taskeng.exe
taskeng.exe {43A00CB5-441F-496F-8098-2624DAB48AD2} S-1-5-21-3618187007-3650799920-3290345941-1000:BPDFUYWR\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Users\Admin\AppData\Roaming\gvhsstr
  C:\Users\Admin\AppData\Roaming\gvhsstr
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\Users\Admin\AppData\Roaming\gvhsstr
    C:\Users\Admin\AppData\Roaming\gvhsstr
    3⤵
    - Executes dropped EXE
    - Checks SCSI registry key(s)
    - Suspicious behavior: MapViewOfSection
    PID:2540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\Roaming\gvhsstr

Filesize
264KB

MD5
dcbd05276d11111f2dd2a7edf52e3386

SHA1
f5dc6d418d9fb2d2cfa4af440ec4ff78da8f11ec

SHA256
cea5245bab036b03f89d549c71f47df8a14854b0de515643bf95319ec5af71d4

SHA512
5f1a9c993cd5394e23b39c43cc7479355c922d1ee8ea48109bbad805209dee697e20759257eca9e2f1b75d34a8c4b4c428a736fa8a468dc18de6c44cb6394846

Download Submit
C:\Users\Admin\AppData\Roaming\gvhsstr

Filesize
264KB

MD5
dcbd05276d11111f2dd2a7edf52e3386

SHA1
f5dc6d418d9fb2d2cfa4af440ec4ff78da8f11ec

SHA256
cea5245bab036b03f89d549c71f47df8a14854b0de515643bf95319ec5af71d4

SHA512
5f1a9c993cd5394e23b39c43cc7479355c922d1ee8ea48109bbad805209dee697e20759257eca9e2f1b75d34a8c4b4c428a736fa8a468dc18de6c44cb6394846

Download Submit
C:\Users\Admin\AppData\Roaming\gvhsstr

Filesize
264KB

MD5
dcbd05276d11111f2dd2a7edf52e3386

SHA1
f5dc6d418d9fb2d2cfa4af440ec4ff78da8f11ec

SHA256
cea5245bab036b03f89d549c71f47df8a14854b0de515643bf95319ec5af71d4

SHA512
5f1a9c993cd5394e23b39c43cc7479355c922d1ee8ea48109bbad805209dee697e20759257eca9e2f1b75d34a8c4b4c428a736fa8a468dc18de6c44cb6394846

Download Submit
memory/1204-17-0x000007FF6BDD0000-0x000007FF6BDDA000-memory.dmp

Filesize
40KB

Download
memory/1204-27-0x000007FEF53F0000-0x000007FEF5533000-memory.dmp

Filesize
1.3MB

Download
memory/1204-8-0x0000000002A50000-0x0000000002A66000-memory.dmp

Filesize
88KB

Download
memory/1204-16-0x000007FEF53F0000-0x000007FEF5533000-memory.dmp

Filesize
1.3MB

Download
memory/1204-28-0x0000000002A90000-0x0000000002AA6000-memory.dmp

Filesize
88KB

Download
memory/1204-33-0x000007FF6BDD0000-0x000007FF6BDDA000-memory.dmp

Filesize
40KB

Download
memory/1724-4-0x00000000002A0000-0x00000000002A9000-memory.dmp

Filesize
36KB

Download
memory/1724-1-0x0000000000840000-0x0000000000940000-memory.dmp

Filesize
1024KB

Download
memory/2540-29-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2540-26-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2792-25-0x0000000000995000-0x00000000009A8000-memory.dmp

Filesize
76KB

Download
memory/2924-9-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2924-7-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2924-6-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2924-5-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2924-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download