buer | 044c16cdbc6ec18f58bfecaacf4d4e21150a19d8d10c694c4a4c3085697499a2

Analysis

max time kernel
16s
max time network
13s
platform
windows7_x64
resource
win7v20201028
submitted
04-01-2021 02:13

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General

Target

146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

softwareconsbank.com

Signatures

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

Buer Loader 3 IoCs

Detects Buer loader in memory or disk.

Processes:

resource	yara_rule
behavioral1/memory/1660-3-0x0000000040000000-0x0000000040009000-memory.dmp	buer
behavioral1/memory/1660-4-0x0000000040005DA8-mapping.dmp	buer
behavioral1/memory/1660-5-0x0000000040000000-0x0000000040009000-memory.dmp	buer

Loads dropped DLL 1 IoCs

Processes:

146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

pid process

1336 146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

pid	process
1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

description	pid	process	target process
PID 1336 set thread context of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

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

Processes:

146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

pid process

1336 146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

pid	process
1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

description	pid	process	target process
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

C:\Users\Admin\AppData\Local\Temp\146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe
"C:\Users\Admin\AppData\Local\Temp\146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1336

C:\Users\Admin\AppData\Local\Temp\146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe
"C:\Users\Admin\AppData\Local\Temp\146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe"
2⤵
PID:1660

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nsx1E1C.tmp\System.dll
MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
memory/1660-3-0x0000000040000000-0x0000000040009000-memory.dmp

Filesize
36KB

Download
memory/1660-4-0x0000000040005DA8-mapping.dmp

Download
memory/1660-5-0x0000000040000000-0x0000000040009000-memory.dmp

Filesize
36KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads