buer | 611ebfdce09ab9d4966796e03fbe0a6e9bc4f6e4a8f81d941d0a5b39c0bab6ff

General

Target

Report_Print.exe
Size

627KB
MD5

935c24fca50f8ac28c040a8c3823df13
SHA1

c7a6e7ace50c47e1d3a54ffd50dbdab26ddcf4ce
SHA256

611ebfdce09ab9d4966796e03fbe0a6e9bc4f6e4a8f81d941d0a5b39c0bab6ff
SHA512

ee2f7213d4ce85865f947d9b6f5ded3535f6337c12f5141cb6ed58d48c20b257a613799e29fd9f5e5c7706d3d38f9e93119752dc3726e0d71b5dcc233fc4fec9

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

https://bankcreditsign.com/

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
behavioral1/memory/1060-0-0x0000000000510000-0x0000000000570000-memory.dmp	buer
behavioral1/memory/1060-1-0x0000000040000000-0x000000004005D000-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)	\??\A:	Report_Print.exe
File opened (read-only)	\??\H:	Report_Print.exe
File opened (read-only)	\??\J:	Report_Print.exe
File opened (read-only)	\??\N:	Report_Print.exe
File opened (read-only)	\??\Y:	Report_Print.exe
File opened (read-only)	\??\Z:	Report_Print.exe
File opened (read-only)	\??\E:	Report_Print.exe
File opened (read-only)	\??\F:	Report_Print.exe
File opened (read-only)	\??\O:	Report_Print.exe
File opened (read-only)	\??\Q:	Report_Print.exe
File opened (read-only)	\??\S:	Report_Print.exe
File opened (read-only)	\??\T:	Report_Print.exe
File opened (read-only)	\??\R:	Report_Print.exe
File opened (read-only)	\??\V:	Report_Print.exe
File opened (read-only)	\??\B:	Report_Print.exe
File opened (read-only)	\??\I:	Report_Print.exe
File opened (read-only)	\??\K:	Report_Print.exe
File opened (read-only)	\??\L:	Report_Print.exe
File opened (read-only)	\??\M:	Report_Print.exe
File opened (read-only)	\??\P:	Report_Print.exe
File opened (read-only)	\??\W:	Report_Print.exe
File opened (read-only)	\??\X:	Report_Print.exe
File opened (read-only)	\??\G:	Report_Print.exe
File opened (read-only)	\??\U:	Report_Print.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1048	powershell.exe
1048	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1048	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1060 wrote to memory of 1048	1060	Report_Print.exe	25
PID 1060 wrote to memory of 1048	1060	Report_Print.exe	25
PID 1060 wrote to memory of 1048	1060	Report_Print.exe	25
PID 1060 wrote to memory of 1048	1060	Report_Print.exe	25

C:\Users\Admin\AppData\Local\Temp\Report_Print.exe
"C:\Users\Admin\AppData\Local\Temp\Report_Print.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:1060
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\492b368bae8f08e1703c}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1048

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/1048-6-0x0000000001100000-0x0000000001101000-memory.dmp

Filesize
4KB

Download
memory/1048-10-0x0000000005660000-0x0000000005661000-memory.dmp

Filesize
4KB

Download
memory/1048-3-0x00000000740F0000-0x00000000747DE000-memory.dmp

Filesize
6.9MB

Download
memory/1048-4-0x0000000000980000-0x0000000000981000-memory.dmp

Filesize
4KB

Download
memory/1048-5-0x00000000049A0000-0x00000000049A1000-memory.dmp

Filesize
4KB

Download
memory/1048-39-0x0000000006310000-0x0000000006311000-memory.dmp

Filesize
4KB

Download
memory/1048-7-0x0000000004750000-0x0000000004751000-memory.dmp

Filesize
4KB

Download
memory/1048-38-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/1048-15-0x00000000060C0000-0x00000000060C1000-memory.dmp

Filesize
4KB

Download
memory/1048-16-0x0000000006160000-0x0000000006161000-memory.dmp

Filesize
4KB

Download
memory/1048-23-0x0000000006280000-0x0000000006281000-memory.dmp

Filesize
4KB

Download
memory/1048-24-0x0000000005610000-0x0000000005611000-memory.dmp

Filesize
4KB

Download
memory/1060-0-0x0000000000510000-0x0000000000570000-memory.dmp

Filesize
384KB

Download
memory/1060-1-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download

Analysis

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