buer | 2e0116e0ddc43c5fefe56a3feb65c5088e7807eaf523715065ba3bfa4968a212

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1880	1828	WerFault.exe	89

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1220	powershell.exe
1220	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1220	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1828 wrote to memory of 1220	1828	05efd2eb94d751614bbe574e3c462bda.exe	90
PID 1828 wrote to memory of 1220	1828	05efd2eb94d751614bbe574e3c462bda.exe	90
PID 1828 wrote to memory of 1220	1828	05efd2eb94d751614bbe574e3c462bda.exe	90

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:1828
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\cde33418037415277c9a}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1220
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1828 -s 748
  2⤵
  - Program crash
  PID:1880

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1828 -ip 1828
1⤵
PID:4596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pzhlfg14.bmn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1220-33-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/1220-44-0x0000000008000000-0x0000000008008000-memory.dmp

Filesize
32KB

Download
memory/1220-3-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/1220-4-0x0000000005B20000-0x0000000006148000-memory.dmp

Filesize
6.2MB

Download
memory/1220-5-0x0000000005A70000-0x0000000005A92000-memory.dmp

Filesize
136KB

Download
memory/1220-6-0x0000000006240000-0x00000000062A6000-memory.dmp

Filesize
408KB

Download
memory/1220-1-0x0000000074CE0000-0x0000000075490000-memory.dmp

Filesize
7.7MB

Download
memory/1220-9-0x00000000062B0000-0x0000000006316000-memory.dmp

Filesize
408KB

Download
memory/1220-17-0x00000000064B0000-0x0000000006804000-memory.dmp

Filesize
3.3MB

Download
memory/1220-18-0x00000000069A0000-0x00000000069BE000-memory.dmp

Filesize
120KB

Download
memory/1220-19-0x00000000069E0000-0x0000000006A2C000-memory.dmp

Filesize
304KB

Download
memory/1220-34-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/1220-47-0x0000000074CE0000-0x0000000075490000-memory.dmp

Filesize
7.7MB

Download
memory/1220-2-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/1220-37-0x0000000007CE0000-0x0000000007CFA000-memory.dmp

Filesize
104KB

Download
memory/1220-22-0x0000000070B00000-0x0000000070B4C000-memory.dmp

Filesize
304KB

Download
memory/1220-21-0x0000000006F80000-0x0000000006FB2000-memory.dmp

Filesize
200KB

Download
memory/1220-20-0x000000007FAF0000-0x000000007FB00000-memory.dmp

Filesize
64KB

Download
memory/1220-32-0x0000000006FC0000-0x0000000006FDE000-memory.dmp

Filesize
120KB

Download
memory/1220-36-0x0000000008320000-0x000000000899A000-memory.dmp

Filesize
6.5MB

Download
memory/1220-38-0x0000000007D50000-0x0000000007D5A000-memory.dmp

Filesize
40KB

Download
memory/1220-39-0x0000000007F60000-0x0000000007FF6000-memory.dmp

Filesize
600KB

Download
memory/1220-40-0x0000000007EE0000-0x0000000007EF1000-memory.dmp

Filesize
68KB

Download
memory/1220-43-0x0000000008020000-0x000000000803A000-memory.dmp

Filesize
104KB

Download
memory/1220-42-0x0000000007F20000-0x0000000007F34000-memory.dmp

Filesize
80KB

Download
memory/1220-0-0x0000000005390000-0x00000000053C6000-memory.dmp

Filesize
216KB

Download
memory/1220-41-0x0000000007F10000-0x0000000007F1E000-memory.dmp

Filesize
56KB

Download
memory/1220-35-0x0000000007BC0000-0x0000000007C63000-memory.dmp

Filesize
652KB

Download

Analysis

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