bazarloader | 487290690d5455b475497515474f45a5daf47ca8b2e8d64155f79f7fad0bb3a8

Analysis

max time kernel
128s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
19/01/2022, 16:14

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General

Target
Attachments.lnk
Size 1KB
Sample220119-tp5vaabdh3
SHA256 6497223d35530f2e510382aa1866b83ffaf215213b8080b7ecb299b6e7e3e6b1
MD5 e87e52db1aa360baf8444c5524dd2b26
SHA1 b89d0c4568c74f03ec3e1917c22a83c37409b10a
SHA512 e93d7808c29ec45569382ee5bd2f50a41c0cf1c1d2cbb909d5aec2abf166f0ad87b672eaa4a1c00b28eb31faf55f1a254d8ab842bcb4d22dd750b26926e7c64a
MD5 SHA1 SHA512

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 1 IoCs

resource	yara_rule
behavioral2/memory/1860-472-0x0000000180000000-0x000000018003D000-memory.dmp	BazarLoaderVar5

Blocklisted process makes network request 4 IoCs

flow	pid	Process
31	1860	rundll32.exe
32	1860	rundll32.exe
33	1860	rundll32.exe
34	1860	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1860	rundll32.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 1908	2236	cmd.exe	53
PID 2236 wrote to memory of 1908	2236	cmd.exe	53
PID 1908 wrote to memory of 376	1908	cmd.exe	54
PID 1908 wrote to memory of 376	1908	cmd.exe	54
PID 1908 wrote to memory of 1860	1908	cmd.exe	55
PID 1908 wrote to memory of 1860	1908	cmd.exe	55

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Attachments.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c xcopy /y DumpStack.log c:\programdata\ && C:\Windows\System32\rundll32.exe C:\programdata\DumpStack.log,spload && exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1908
- - C:\Windows\system32\xcopy.exe
    xcopy /y DumpStack.log c:\programdata\
    3⤵
    PID:376
- - C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\programdata\DumpStack.log,spload
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:1860

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1860-472-0x0000000180000000-0x000000018003D000-memory.dmp

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