bazarloader | 0fb8a792dd48796bac2d508c1928aa539ced639ea99a5e2c9d6e2be5a7e82d43

Analysis

max time kernel
119s
max time network
120s
platform
windows10_x64
resource
win10v20201028
submitted
10/12/2020, 17:39

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General

Target
PreviewDoc.exe
Size 380KB
Sample201210-2smtecfjrs
SHA256 0fb8a792dd48796bac2d508c1928aa539ced639ea99a5e2c9d6e2be5a7e82d43
MD5 7a240ae3cf85ad67310c2b307f592012
SHA1 085d5e492de6a3175f4c3f4ccc479fc11f88092f
SHA512 e783dedc9696e8fbbcf13023be8268f250816c543e1513ce5f0d7c5d52b0942316e12a1bb0702fdbeb6ff44e1452c37149e8764c9ef1b48574449669e43df6e9
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

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 492 created 3016	492	PreviewDoc.exe	22

Bazar/Team9 Loader payload 2 IoCs

resource	yara_rule
behavioral2/memory/492-2-0x00000000020D0000-0x00000000020F9000-memory.dmp	BazarLoaderVar1
behavioral2/memory/492-3-0x0000000180000000-0x0000000180026000-memory.dmp	BazarLoaderVar1

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 492 set thread context of 3056	492	PreviewDoc.exe	78

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
492	PreviewDoc.exe
492	PreviewDoc.exe
492	PreviewDoc.exe
492	PreviewDoc.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 492 wrote to memory of 3056	492	PreviewDoc.exe	78
PID 492 wrote to memory of 3056	492	PreviewDoc.exe	78
PID 492 wrote to memory of 3056	492	PreviewDoc.exe	78
PID 492 wrote to memory of 3056	492	PreviewDoc.exe	78
PID 492 wrote to memory of 3056	492	PreviewDoc.exe	78
PID 492 wrote to memory of 3056	492	PreviewDoc.exe	78
PID 492 wrote to memory of 3056	492	PreviewDoc.exe	78

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3016
- C:\Users\Admin\AppData\Local\Temp\PreviewDoc.exe
  "C:\Users\Admin\AppData\Local\Temp\PreviewDoc.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:492
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe"
  2⤵
  PID:3056

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/492-2-0x00000000020D0000-0x00000000020F9000-memory.dmp

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memory/492-3-0x0000000180000000-0x0000000180026000-memory.dmp

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memory/3056-4-0x00007FF6CACD0000-0x00007FF6CACF4000-memory.dmp

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