bazarloader | d5c03179945956647ebd5c1481506cec6cd412bc624872942bbf5f7082536b06

General

Target

d5c03179945956647ebd5c1481506cec6cd412bc624872942bbf5f7082536b06.xll
Size

1.7MB
MD5

96bf23090b0733562da8bb1444dc4078
SHA1

2382fc9ac2e24e153826908f3d7ccea3d19f62cd
SHA256

d5c03179945956647ebd5c1481506cec6cd412bc624872942bbf5f7082536b06
SHA512

fcf83721975533034e56069d5880fe4f7cbbd618d288ca7a0e69765ca62cc02a5e70621d8bef68749b084f76cbbf79d5115fda78bd12f34ff3c5a6d64454a0a4

Score

10^/10

bazarloader dropper loader

Malware Config

Extracted

Language

xlm4.0

Source

Signatures

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

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1840	3164	rundll32.exe	51

Bazar/Team9 Loader payload 1 IoCs

resource	yara_rule
behavioral1/memory/1840-152-0x0000000180000000-0x000000018003C000-memory.dmp	BazarLoaderVar5

Blocklisted process makes network request 4 IoCs

flow	pid	Process
33	1840	rundll32.exe
34	1840	rundll32.exe
37	1840	rundll32.exe
38	1840	rundll32.exe

Loads dropped DLL 3 IoCs

pid	Process
3164	EXCEL.EXE
3164	EXCEL.EXE
1840	rundll32.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3164	EXCEL.EXE

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
3164	EXCEL.EXE
3164	EXCEL.EXE
3164	EXCEL.EXE
3164	EXCEL.EXE
3164	EXCEL.EXE
3164	EXCEL.EXE
3164	EXCEL.EXE
3164	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 1840	3164	EXCEL.EXE	53
PID 3164 wrote to memory of 1840	3164	EXCEL.EXE	53

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\d5c03179945956647ebd5c1481506cec6cd412bc624872942bbf5f7082536b06.xll"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 C:\Users\Admin\JavaObjectReflectiveD.dll , dopt
  2⤵
  - Process spawned unexpected child process
  - Blocklisted process makes network request
  - Loads dropped DLL
  PID:1840

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1840-152-0x0000000180000000-0x000000018003C000-memory.dmp

Filesize
240KB

Download
memory/3164-134-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download
memory/3164-138-0x00007FF801E70000-0x00007FF801E80000-memory.dmp

Filesize
64KB

Download
memory/3164-137-0x00007FF801E70000-0x00007FF801E80000-memory.dmp

Filesize
64KB

Download
memory/3164-130-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download
memory/3164-133-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download
memory/3164-132-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download
memory/3164-131-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download
memory/3164-174-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download
memory/3164-175-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download
memory/3164-176-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download
memory/3164-177-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads