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
behavioral1/memory/824-0-0x00000000003A0000-0x0000000000400000-memory.dmp	buer
behavioral1/memory/824-1-0x0000000040000000-0x000000004005E000-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)	\??\X:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\A:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\E:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\R:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\K:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\L:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\T:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\B:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\F:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\I:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\Q:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\S:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\W:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\Y:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\G:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\J:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\N:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\P:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\U:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\V:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\Z:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\H:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\M:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe
File opened (read-only)	\??\O:	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
304	powershell.exe
304	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	304	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 824 wrote to memory of 304	824	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe	25
PID 824 wrote to memory of 304	824	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe	25
PID 824 wrote to memory of 304	824	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe	25
PID 824 wrote to memory of 304	824	de2388449b4dc4bbf7031700d409777ec1fdd7d91e57e9a29eb865b1c95312d0.exe	25

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:824
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\e4c08eea7c1293e36e8b}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:304

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/304-6-0x00000000012C0000-0x00000000012C1000-memory.dmp

Filesize
4KB

Download
memory/304-10-0x0000000006100000-0x0000000006101000-memory.dmp

Filesize
4KB

Download
memory/304-3-0x0000000073C60000-0x000000007434E000-memory.dmp

Filesize
6.9MB

Download
memory/304-4-0x0000000000F80000-0x0000000000F81000-memory.dmp

Filesize
4KB

Download
memory/304-5-0x00000000047F0000-0x00000000047F1000-memory.dmp

Filesize
4KB

Download
memory/304-39-0x0000000006310000-0x0000000006311000-memory.dmp

Filesize
4KB

Download
memory/304-7-0x0000000005240000-0x0000000005241000-memory.dmp

Filesize
4KB

Download
memory/304-38-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/304-15-0x0000000006090000-0x0000000006091000-memory.dmp

Filesize
4KB

Download
memory/304-16-0x0000000006160000-0x0000000006161000-memory.dmp

Filesize
4KB

Download
memory/304-23-0x0000000006280000-0x0000000006281000-memory.dmp

Filesize
4KB

Download
memory/304-24-0x0000000006220000-0x0000000006221000-memory.dmp

Filesize
4KB

Download
memory/824-0-0x00000000003A0000-0x0000000000400000-memory.dmp

Filesize
384KB

Download
memory/824-1-0x0000000040000000-0x000000004005E000-memory.dmp

Filesize
376KB

Download

Analysis

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