Malware Analysis Report

2025-01-02 11:13

Sample ID 240312-hkl1tsah6x
Target c2b79f67176c24ccdccf2572812949c2
SHA256 2e2c3b22a461a389674c11303509a42746fd20a8c91b3e468bee71f28500f7c6
Tags
smokeloader pub1 backdoor trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

2e2c3b22a461a389674c11303509a42746fd20a8c91b3e468bee71f28500f7c6

Threat Level: Known bad

The file c2b79f67176c24ccdccf2572812949c2 was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Executes dropped EXE

Deletes itself

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Checks SCSI registry key(s)

Suspicious behavior: MapViewOfSection

Suspicious use of UnmapMainImage

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-12 06:47

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-12 06:47

Reported

2024-03-12 06:50

Platform

win7-20240220-en

Max time kernel

150s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

Description Indicator Process Target
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Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\ututjjb N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ututjjb N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ututjjb N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\ututjjb N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\ututjjb N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2332 wrote to memory of 1936 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ututjjb
PID 2332 wrote to memory of 1936 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ututjjb
PID 2332 wrote to memory of 1936 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ututjjb
PID 2332 wrote to memory of 1936 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Roaming\ututjjb

Processes

C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe

"C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {B76CBF26-C9C2-4AEF-A265-6E9B4F76E9D9} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\ututjjb

C:\Users\Admin\AppData\Roaming\ututjjb

Network

Country Destination Domain Proto
US 8.8.8.8:53 aucmoney.com udp
US 8.8.8.8:53 thegymmum.com udp
US 8.8.8.8:53 atvcampingtrips.com udp
US 8.8.8.8:53 kuapakualaman.com udp
US 8.8.8.8:53 renatazarazua.com udp
US 8.8.8.8:53 nasufmutlu.com udp

Files

memory/1636-2-0x0000000000220000-0x0000000000229000-memory.dmp

memory/1636-1-0x00000000024B0000-0x00000000025B0000-memory.dmp

memory/1636-3-0x0000000000400000-0x00000000023AD000-memory.dmp

memory/1636-5-0x0000000000400000-0x00000000023AD000-memory.dmp

memory/1152-4-0x0000000002A90000-0x0000000002AA6000-memory.dmp

C:\Users\Admin\AppData\Roaming\ututjjb

MD5 c2b79f67176c24ccdccf2572812949c2
SHA1 5fd3e2a20b5dc790ab748dbd41131defdec13ca9
SHA256 2e2c3b22a461a389674c11303509a42746fd20a8c91b3e468bee71f28500f7c6
SHA512 f46458cb1e881e0ce46237b0a78ce6bc5c1f583678c31df8b385b7bf4768dc5a0b4c9493cf8db2d83e40e0aa36919d7d813feccb5a2332d042d666fb64baddac

memory/1936-14-0x0000000002810000-0x0000000002910000-memory.dmp

memory/1936-15-0x0000000000400000-0x00000000023AD000-memory.dmp

memory/1152-16-0x0000000002980000-0x0000000002996000-memory.dmp

memory/1936-19-0x0000000000400000-0x00000000023AD000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-12 06:47

Reported

2024-03-12 06:50

Platform

win10v2004-20240226-en

Max time kernel

153s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Deletes itself

Description Indicator Process Target
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\hhcattf N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\hhcattf N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\hhcattf N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Roaming\hhcattf N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
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Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\hhcattf N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A N/A N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe

"C:\Users\Admin\AppData\Local\Temp\c2b79f67176c24ccdccf2572812949c2.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4072 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8

C:\Users\Admin\AppData\Roaming\hhcattf

C:\Users\Admin\AppData\Roaming\hhcattf

Network

Country Destination Domain Proto
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 aucmoney.com udp
US 8.8.8.8:53 thegymmum.com udp
US 8.8.8.8:53 atvcampingtrips.com udp
US 8.8.8.8:53 kuapakualaman.com udp
US 8.8.8.8:53 renatazarazua.com udp
US 8.8.8.8:53 nasufmutlu.com udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
NL 142.251.36.42:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 42.36.251.142.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 209.143.182.52.in-addr.arpa udp

Files

memory/4108-1-0x0000000002460000-0x0000000002560000-memory.dmp

memory/4108-2-0x0000000002570000-0x0000000002579000-memory.dmp

memory/4108-3-0x0000000000400000-0x00000000023AD000-memory.dmp

memory/3240-4-0x00000000028C0000-0x00000000028D6000-memory.dmp

memory/4108-6-0x0000000000400000-0x00000000023AD000-memory.dmp

memory/4108-8-0x0000000002570000-0x0000000002579000-memory.dmp

C:\Users\Admin\AppData\Roaming\hhcattf

MD5 c2b79f67176c24ccdccf2572812949c2
SHA1 5fd3e2a20b5dc790ab748dbd41131defdec13ca9
SHA256 2e2c3b22a461a389674c11303509a42746fd20a8c91b3e468bee71f28500f7c6
SHA512 f46458cb1e881e0ce46237b0a78ce6bc5c1f583678c31df8b385b7bf4768dc5a0b4c9493cf8db2d83e40e0aa36919d7d813feccb5a2332d042d666fb64baddac

memory/2460-15-0x0000000002670000-0x0000000002770000-memory.dmp

memory/2460-16-0x0000000000400000-0x00000000023AD000-memory.dmp

memory/3240-17-0x00000000009D0000-0x00000000009E6000-memory.dmp

memory/2460-20-0x0000000000400000-0x00000000023AD000-memory.dmp