buer | de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0

General

Target

de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
Size

626KB
MD5

4b24d2ad12d3bd600a210c53cd87409f
SHA1

0fb8697a1d4fd505eaf401eb20b3318ea0643617
SHA256

de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0
SHA512

25ef0cb2b81d70d7c3243051f684732d5261c4bd7a0ac1a783357ae73b22268952737cfe744a7ff0e50c5cb11f58aedc17803a438e39817b31dc011382d43a4f

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

https://itofficemasword.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/4092-0-0x0000000000A80000-0x0000000000AE0000-memory.dmp	buer
behavioral2/memory/4092-1-0x0000000040000000-0x000000004005E000-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)	\??\I:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\O:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\S:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\E:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\K:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\V:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\Y:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\M:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\R:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\A:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\B:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\F:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\G:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\J:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\L:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\U:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\X:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\Z:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\H:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\N:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\P:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\Q:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\T:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\W:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
352	powershell.exe
352	powershell.exe
352	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	352	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 352	4092	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe	72
PID 4092 wrote to memory of 352	4092	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe	72
PID 4092 wrote to memory of 352	4092	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe	72

C:\Users\Admin\AppData\Local\Temp\de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
"C:\Users\Admin\AppData\Local\Temp\de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\a7d7df6e24bead683389}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:352

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/352-8-0x00000000078D0000-0x00000000078D1000-memory.dmp

Filesize
4KB

Download
memory/352-26-0x00000000091E0000-0x00000000091E1000-memory.dmp

Filesize
4KB

Download
memory/352-9-0x0000000007940000-0x0000000007941000-memory.dmp

Filesize
4KB

Download
memory/352-3-0x00000000731A0000-0x000000007388E000-memory.dmp

Filesize
6.9MB

Download
memory/352-4-0x0000000004500000-0x0000000004501000-memory.dmp

Filesize
4KB

Download
memory/352-5-0x00000000071A0000-0x00000000071A1000-memory.dmp

Filesize
4KB

Download
memory/352-6-0x0000000006DE0000-0x0000000006DE1000-memory.dmp

Filesize
4KB

Download
memory/352-7-0x0000000006F80000-0x0000000006F81000-memory.dmp

Filesize
4KB

Download
memory/352-24-0x00000000091F0000-0x00000000091F1000-memory.dmp

Filesize
4KB

Download
memory/352-11-0x0000000007CA0000-0x0000000007CA1000-memory.dmp

Filesize
4KB

Download
memory/352-10-0x0000000007080000-0x0000000007081000-memory.dmp

Filesize
4KB

Download
memory/352-12-0x0000000008010000-0x0000000008011000-memory.dmp

Filesize
4KB

Download
memory/352-14-0x0000000008D30000-0x0000000008D63000-memory.dmp

Filesize
204KB

Download
memory/352-21-0x0000000008D10000-0x0000000008D11000-memory.dmp

Filesize
4KB

Download
memory/352-22-0x0000000008E80000-0x0000000008E81000-memory.dmp

Filesize
4KB

Download
memory/352-23-0x0000000009250000-0x0000000009251000-memory.dmp

Filesize
4KB

Download
memory/4092-1-0x0000000040000000-0x000000004005E000-memory.dmp

Filesize
376KB

Download
memory/4092-0-0x0000000000A80000-0x0000000000AE0000-memory.dmp

Filesize
384KB

Download

Analysis

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