buer | 7d502dec22302537441fdc43c60eed70bcde7f97bb14414e7859439d2ec7914f

Analysis

max time kernel
7s
max time network
10s
platform
windows7_x64
resource
win7v20201028
submitted
03-02-2021 07:21

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General

Target

licenser.txt.exe
Size

110KB
MD5

63e7beb498ebe532263c977d71f664c3
SHA1

ba5e80517cef90a4fe50753a2b3c134a400b478c
SHA256

7d502dec22302537441fdc43c60eed70bcde7f97bb14414e7859439d2ec7914f
SHA512

cd4385b9e1bfbe504fd1d69388e5839fd196801b9c5f41e020d39083092d7f402662753464626d633b06fe1f0bb97e6360f93602f34e4eb88dfd06ba9fce6758

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

webgraitupeople.com

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer

Buer Loader 1 IoCs

Detects Buer loader in memory or disk.

resource	yara_rule
behavioral1/memory/1828-5-0x0000000040000000-0x000000004000A000-memory.dmp	buer

Loads dropped DLL 1 IoCs

pid	Process
1088	licenser.txt.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1088 set thread context of 1828	1088	licenser.txt.exe	29

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1088	licenser.txt.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 1828	1088	licenser.txt.exe	29
PID 1088 wrote to memory of 1828	1088	licenser.txt.exe	29
PID 1088 wrote to memory of 1828	1088	licenser.txt.exe	29
PID 1088 wrote to memory of 1828	1088	licenser.txt.exe	29
PID 1088 wrote to memory of 1828	1088	licenser.txt.exe	29

C:\Users\Admin\AppData\Local\Temp\licenser.txt.exe
"C:\Users\Admin\AppData\Local\Temp\licenser.txt.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Users\Admin\AppData\Local\Temp\licenser.txt.exe
  "C:\Users\Admin\AppData\Local\Temp\licenser.txt.exe"
  2⤵
  PID:1828

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/1088-2-0x0000000075D61000-0x0000000075D63000-memory.dmp

Filesize
8KB

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memory/1828-5-0x0000000040000000-0x000000004000A000-memory.dmp

Filesize
40KB

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