buer | e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd

General

Target

e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
Size

577KB
MD5

7d8f0a53352c9188acef922dbecfa588
SHA1

dc6115bdc6d63f476203e54e40cb35df72d4014d
SHA256

e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd
SHA512

6dd3b5d633344f0ee5d59589c28f45ab3647c5d41da27fe39f3025b826b2043a4fc094862762d4080d6546acac4996d25484501b09dc18da597dfb42e6600fa6

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

https://178.62.46.155/

Signatures

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

Buer Loader 2 IoCs

Detects Buer loader in memory or disk.

resource	yara_rule
behavioral2/memory/3888-0-0x0000000000570000-0x000000000057F000-memory.dmp	buer
behavioral2/memory/3888-1-0x0000000040000000-0x000000004000C000-memory.dmp	buer

Enumerates connected drives 3 TTPs 24 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)	\??\K:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\Q:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\V:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\F:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\H:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\O:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\S:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\X:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\Y:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\B:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\I:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\L:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\M:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\N:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\P:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\R:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\W:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\A:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\E:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\T:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\U:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\Z:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\G:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\J:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2432	powershell.exe
2432	powershell.exe
2432	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2432	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3888 wrote to memory of 2432	3888	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe	75
PID 3888 wrote to memory of 2432	3888	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe	75
PID 3888 wrote to memory of 2432	3888	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe	75

C:\Users\Admin\AppData\Local\Temp\e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
"C:\Users\Admin\AppData\Local\Temp\e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:3888
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\19cd5e67f0bb8ffd369b}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2432

Network

MITRE ATT&CK Enterprise v6

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

memory/2432-8-0x00000000074D0000-0x00000000074D1000-memory.dmp

Filesize
4KB

Download
memory/2432-26-0x0000000008E60000-0x0000000008E61000-memory.dmp

Filesize
4KB

Download
memory/2432-9-0x0000000007540000-0x0000000007541000-memory.dmp

Filesize
4KB

Download
memory/2432-3-0x0000000073E00000-0x00000000744EE000-memory.dmp

Filesize
6.9MB

Download
memory/2432-4-0x0000000004450000-0x0000000004451000-memory.dmp

Filesize
4KB

Download
memory/2432-5-0x0000000006C50000-0x0000000006C51000-memory.dmp

Filesize
4KB

Download
memory/2432-6-0x0000000006A50000-0x0000000006A51000-memory.dmp

Filesize
4KB

Download
memory/2432-7-0x0000000007280000-0x0000000007281000-memory.dmp

Filesize
4KB

Download
memory/2432-24-0x0000000008E70000-0x0000000008E71000-memory.dmp

Filesize
4KB

Download
memory/2432-11-0x0000000007C80000-0x0000000007C81000-memory.dmp

Filesize
4KB

Download
memory/2432-10-0x0000000007910000-0x0000000007911000-memory.dmp

Filesize
4KB

Download
memory/2432-12-0x0000000007CD0000-0x0000000007CD1000-memory.dmp

Filesize
4KB

Download
memory/2432-14-0x00000000089B0000-0x00000000089E3000-memory.dmp

Filesize
204KB

Download
memory/2432-21-0x0000000008990000-0x0000000008991000-memory.dmp

Filesize
4KB

Download
memory/2432-22-0x0000000008D00000-0x0000000008D01000-memory.dmp

Filesize
4KB

Download
memory/2432-23-0x0000000008ED0000-0x0000000008ED1000-memory.dmp

Filesize
4KB

Download
memory/3888-1-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/3888-0-0x0000000000570000-0x000000000057F000-memory.dmp

Filesize
60KB

Download

Analysis

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