buer | 4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d

General

Target

4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
Size

693KB
MD5

b61b330f0ad589422d862cebf65e92c1
SHA1

54d7cb2745607e2ea52db8423cf9f210c7674ee6
SHA256

4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d
SHA512

534bc27db1c8df0ff2c7e5aaf4dc6a4aaffde931e3dacb2490b219c3a0323362afdec5d65d18d6c1ba44cbd384a1020319ff3298ab1330cab459b8b198d46dc1

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/1012-0-0x0000000001ED0000-0x0000000001F30000-memory.dmp	buer
behavioral1/memory/1012-1-0x0000000040000000-0x000000004005D000-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)	\??\B:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\P:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\Y:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\A:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\M:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\Q:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\R:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\U:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\V:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\H:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\K:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\N:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\S:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\T:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\X:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\Z:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\F:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\G:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\I:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\J:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\L:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\O:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\W:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
File opened (read-only)	\??\E:	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1632	powershell.exe
1632	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1632	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1012 wrote to memory of 1632	1012	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe	25
PID 1012 wrote to memory of 1632	1012	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe	25
PID 1012 wrote to memory of 1632	1012	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe	25
PID 1012 wrote to memory of 1632	1012	4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe	25

C:\Users\Admin\AppData\Local\Temp\4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe
"C:\Users\Admin\AppData\Local\Temp\4c51b8b7cd48ab404a9259da953f6222d73b80b9ce440dd2fe6632000090e73d.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:1012
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\d4c40682b2ce59ca941c}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1632

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/1012-0-0x0000000001ED0000-0x0000000001F30000-memory.dmp

Filesize
384KB

Download
memory/1012-1-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/1632-3-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/1632-4-0x0000000000ED0000-0x0000000000ED1000-memory.dmp

Filesize
4KB

Download
memory/1632-5-0x0000000004A20000-0x0000000004A21000-memory.dmp

Filesize
4KB

Download
memory/1632-6-0x0000000001100000-0x0000000001101000-memory.dmp

Filesize
4KB

Download
memory/1632-7-0x0000000004950000-0x0000000004951000-memory.dmp

Filesize
4KB

Download
memory/1632-10-0x0000000005660000-0x0000000005661000-memory.dmp

Filesize
4KB

Download
memory/1632-15-0x0000000006090000-0x0000000006091000-memory.dmp

Filesize
4KB

Download
memory/1632-16-0x00000000060E0000-0x00000000060E1000-memory.dmp

Filesize
4KB

Download
memory/1632-23-0x0000000006280000-0x0000000006281000-memory.dmp

Filesize
4KB

Download
memory/1632-24-0x0000000005610000-0x0000000005611000-memory.dmp

Filesize
4KB

Download
memory/1632-38-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/1632-39-0x0000000006310000-0x0000000006311000-memory.dmp

Filesize
4KB

Download

Analysis

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