buer | 2e0116e0ddc43c5fefe56a3feb65c5088e7807eaf523715065ba3bfa4968a212

Analysis

max time kernel
119s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
21-12-2023 21:49

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General

Target

05efd2eb94d751614bbe574e3c462bda.exe
Size

363KB
MD5

05efd2eb94d751614bbe574e3c462bda
SHA1

3544b0e4f7ebc5da1fb99fbc3b6492babb974f7d
SHA256

2e0116e0ddc43c5fefe56a3feb65c5088e7807eaf523715065ba3bfa4968a212
SHA512

6a0db6ea489065ff3506d726afd89fde9ed007bbfcc60b278139eb614dafc9f371c60cf4914caa8156d756ba892f2860d85301c0579a702b6cc38f2e9b2b9066
SSDEEP

6144:FJzFw5BxRZx7uwghZbHxcO9cNDPxADPaPUDn4EiHrDVWTIXVfqNNL5j2JtphjIEG:rz8EVh9x1wFyj41LDVHdaijxO

Score

10^/10

buer loader

Malware Config

Signatures

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

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\G:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\H:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\P:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\T:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\W:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\Z:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\B:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\J:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\M:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\O:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\Y:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\K:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\R:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\X:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\S:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\U:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\A:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\E:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\I:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\L:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\N:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\Q:	05efd2eb94d751614bbe574e3c462bda.exe
File opened (read-only)	\??\V:	05efd2eb94d751614bbe574e3c462bda.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
760	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	760	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 760	2660	05efd2eb94d751614bbe574e3c462bda.exe	28
PID 2660 wrote to memory of 760	2660	05efd2eb94d751614bbe574e3c462bda.exe	28
PID 2660 wrote to memory of 760	2660	05efd2eb94d751614bbe574e3c462bda.exe	28
PID 2660 wrote to memory of 760	2660	05efd2eb94d751614bbe574e3c462bda.exe	28

C:\Users\Admin\AppData\Local\Temp\05efd2eb94d751614bbe574e3c462bda.exe
"C:\Users\Admin\AppData\Local\Temp\05efd2eb94d751614bbe574e3c462bda.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\ebbb4de32b258fc9dc6d}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/760-2-0x0000000073CD0000-0x000000007427B000-memory.dmp

Filesize
5.7MB

Download
memory/760-3-0x0000000073CD0000-0x000000007427B000-memory.dmp

Filesize
5.7MB

Download
memory/760-4-0x00000000027A0000-0x00000000027E0000-memory.dmp

Filesize
256KB

Download
memory/760-5-0x00000000027A0000-0x00000000027E0000-memory.dmp

Filesize
256KB

Download
memory/760-6-0x00000000027A0000-0x00000000027E0000-memory.dmp

Filesize
256KB

Download
memory/760-7-0x0000000073CD0000-0x000000007427B000-memory.dmp

Filesize
5.7MB

Download