bazarloader | 29fc04ad420d5b64e7f420c6d9b4f86b9ee4e36483538d4e3b1835950baca760

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11-04-2024 12:37

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General

Target

Documents.lnk
Size

1KB
MD5

857402be70e2963aebaed2162585dfed
SHA1

de55e131a8e20331f170aa6cdaca522bcf549f29
SHA256

d982cd19473751d5d32f749e198e42d4cae2548eae65b532d0d121a275f62b8f
SHA512

f61f8670c035f9a3d3de25a6b15abd0b974debb721338c7bbf1fd38734f6c02a121d87a0ec6caa29992a66d19da28ff07667f0e8ffb19fdc1e5f8c467e9ca7e9

Score

10^/10

bazarloader dropper loader

Malware Config

Signatures

Bazar Loader
Detected loader normally used to deploy BazarBackdoor malware.
loader dropper bazarloader

Bazar/Team9 Loader payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2148-5-0x0000000180000000-0x000000018002A000-memory.dmp	BazarLoaderVar5
behavioral2/memory/2148-6-0x0000000180000000-0x000000018002A000-memory.dmp	BazarLoaderVar5
behavioral2/memory/2148-7-0x0000000180000000-0x000000018002A000-memory.dmp	BazarLoaderVar5

Blocklisted process makes network request 5 IoCs

Processes:

rundll32.exe

flow pid process

50 2148 rundll32.exe
51 2148 rundll32.exe
52 2148 rundll32.exe
53 2148 rundll32.exe
54 2148 rundll32.exe
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

cmd.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation cmd.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2148 rundll32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	pid	process
50	2148	rundll32.exe
51	2148	rundll32.exe
52	2148	rundll32.exe
53	2148	rundll32.exe
54	2148	rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	cmd.exe

pid	process
2148	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

cmd.execmd.exe

description	pid	process	target process
PID 3448 wrote to memory of 2052	3448	cmd.exe	cmd.exe
PID 3448 wrote to memory of 2052	3448	cmd.exe	cmd.exe
PID 2052 wrote to memory of 2040	2052	cmd.exe	xcopy.exe
PID 2052 wrote to memory of 2040	2052	cmd.exe	xcopy.exe
PID 2052 wrote to memory of 2148	2052	cmd.exe	rundll32.exe
PID 2052 wrote to memory of 2148	2052	cmd.exe	rundll32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Documents.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3448

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C xcopy /H Documents.tmp c:\programdata && start rundll32.exe c:\programdata\Documents.tmp,EnterDll && del Documents.lnk && del Documents.tmp && mkdir Documents && exit
2⤵
- Suspicious use of WriteProcessMemory
PID:2052

C:\Windows\system32\xcopy.exe
xcopy /H Documents.tmp c:\programdata
3⤵
PID:2040

C:\Windows\system32\rundll32.exe
rundll32.exe c:\programdata\Documents.tmp,EnterDll
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:2148

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\??\c:\programdata\Documents.tmp
Filesize
724KB

MD5
d7e7cf2ed643c84f35da54f6abbc8409

SHA1
4eaff70353abf1a9d1caf840d7a23c3f72fc5bb6

SHA256
4374f12287c158cc6e9421640b459455307e471711cc41f5666a1cbc553a3eb3

SHA512
cdf21fdcece645df88392bb9a0a865cb6ff5180d25bdeffab3a781c58612c84e0b2de1cbca8dacbfd307e3afcaf1fb5f60527f572c6b6098a43defc142799b21

Download Submit
memory/2148-5-0x0000000180000000-0x000000018002A000-memory.dmp

Filesize
168KB

Download
memory/2148-6-0x0000000180000000-0x000000018002A000-memory.dmp

Filesize
168KB

Download
memory/2148-7-0x0000000180000000-0x000000018002A000-memory.dmp

Filesize
168KB

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