buer | a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698

General

Target

a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
Size

693KB
MD5

752be5fff55e3a059d9ec4be816d11a4
SHA1

e2f14b56875eb1e3ce4a2b3bd2ec92488eb51b84
SHA256

a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698
SHA512

b8c25e60c25303b212e986339d29f0b75fbaafacaef99848955b1e984603eb59102f00ac94cc22cc4c487fd9ecc34920f04f1599a543dd5643f8048c512f1b20

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
behavioral2/memory/3952-0-0x0000000002490000-0x00000000024F0000-memory.dmp	buer
behavioral2/memory/3952-1-0x0000000040000000-0x000000004005D000-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)	\??\L:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\M:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\Q:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\U:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\A:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\F:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\G:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\H:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\J:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\N:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\R:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\S:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\T:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\V:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\W:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\B:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\K:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\O:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\X:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\Y:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\Z:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\E:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\I:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
File opened (read-only)	\??\P:	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2760	powershell.exe
2760	powershell.exe
2760	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2760	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3952 wrote to memory of 2760	3952	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe	72
PID 3952 wrote to memory of 2760	3952	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe	72
PID 3952 wrote to memory of 2760	3952	a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe	72

C:\Users\Admin\AppData\Local\Temp\a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe
"C:\Users\Admin\AppData\Local\Temp\a65e1e7ff8c9c03d3fa3abf621bbf69db210c1a437aebbe98a0da3b41518b698.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:3952
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\8faec319dfa997a0fe6d}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2760

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/2760-8-0x00000000076B0000-0x00000000076B1000-memory.dmp

Filesize
4KB

Download
memory/2760-26-0x0000000006B40000-0x0000000006B41000-memory.dmp

Filesize
4KB

Download
memory/2760-9-0x0000000007820000-0x0000000007821000-memory.dmp

Filesize
4KB

Download
memory/2760-3-0x0000000073CB0000-0x000000007439E000-memory.dmp

Filesize
6.9MB

Download
memory/2760-4-0x00000000067E0000-0x00000000067E1000-memory.dmp

Filesize
4KB

Download
memory/2760-5-0x0000000006E70000-0x0000000006E71000-memory.dmp

Filesize
4KB

Download
memory/2760-6-0x0000000006E00000-0x0000000006E01000-memory.dmp

Filesize
4KB

Download
memory/2760-7-0x00000000075D0000-0x00000000075D1000-memory.dmp

Filesize
4KB

Download
memory/2760-24-0x0000000009240000-0x0000000009241000-memory.dmp

Filesize
4KB

Download
memory/2760-11-0x0000000007CB0000-0x0000000007CB1000-memory.dmp

Filesize
4KB

Download
memory/2760-10-0x0000000007B90000-0x0000000007B91000-memory.dmp

Filesize
4KB

Download
memory/2760-12-0x0000000008040000-0x0000000008041000-memory.dmp

Filesize
4KB

Download
memory/2760-14-0x0000000008D40000-0x0000000008D73000-memory.dmp

Filesize
204KB

Download
memory/2760-21-0x0000000008D20000-0x0000000008D21000-memory.dmp

Filesize
4KB

Download
memory/2760-22-0x00000000090C0000-0x00000000090C1000-memory.dmp

Filesize
4KB

Download
memory/2760-23-0x00000000092E0000-0x00000000092E1000-memory.dmp

Filesize
4KB

Download
memory/3952-1-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/3952-0-0x0000000002490000-0x00000000024F0000-memory.dmp

Filesize
384KB

Download

Analysis

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