buer | 6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d

General

Target

6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
Size

598KB
MD5

8b44470c7ff69ae671ff6e04550ee15f
SHA1

123f9a7487cd0fdd772f0e7bb19e70d1ee3a32e7
SHA256

6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d
SHA512

0e03e5895bd406ed61c6e5343e184eb5a86d4ee1b195b35be88fea4fee4508b0a525725ec92971f2c0bc1a929d4dda1f0853bc576071cdefef8adb1a5f45e0de

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

https://104.248.83.13/

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/424-0-0x00000000005F0000-0x00000000005FF000-memory.dmp	buer
behavioral2/memory/424-1-0x0000000040000000-0x000000004000C000-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)	\??\H:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\J:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\R:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\X:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\A:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\F:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\S:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\Y:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\E:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\M:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\O:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\Q:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\T:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\U:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\W:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\Z:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\K:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\G:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\I:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\L:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\N:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\P:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\V:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
File opened (read-only)	\??\B:	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3900	powershell.exe
3900	powershell.exe
3900	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3900	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 424 wrote to memory of 3900	424	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe	75
PID 424 wrote to memory of 3900	424	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe	75
PID 424 wrote to memory of 3900	424	6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe	75

C:\Users\Admin\AppData\Local\Temp\6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe
"C:\Users\Admin\AppData\Local\Temp\6c7f43434e5db8703c0a47dedeeab976159d8704bfbe2e4ff65405f38d508e9d.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:424
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\0f2f2eaa658e35e22fe0}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3900

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/424-0-0x00000000005F0000-0x00000000005FF000-memory.dmp

Filesize
60KB

Download
memory/424-1-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/3900-3-0x00000000737C0000-0x0000000073EAE000-memory.dmp

Filesize
6.9MB

Download
memory/3900-4-0x00000000052A0000-0x00000000052A1000-memory.dmp

Filesize
4KB

Download
memory/3900-5-0x0000000007BB0000-0x0000000007BB1000-memory.dmp

Filesize
4KB

Download
memory/3900-6-0x00000000079B0000-0x00000000079B1000-memory.dmp

Filesize
4KB

Download
memory/3900-7-0x0000000007A50000-0x0000000007A51000-memory.dmp

Filesize
4KB

Download
memory/3900-8-0x0000000007AC0000-0x0000000007AC1000-memory.dmp

Filesize
4KB

Download
memory/3900-9-0x00000000082E0000-0x00000000082E1000-memory.dmp

Filesize
4KB

Download
memory/3900-10-0x0000000008650000-0x0000000008651000-memory.dmp

Filesize
4KB

Download
memory/3900-11-0x0000000008B00000-0x0000000008B01000-memory.dmp

Filesize
4KB

Download
memory/3900-12-0x0000000008A40000-0x0000000008A41000-memory.dmp

Filesize
4KB

Download
memory/3900-14-0x0000000009800000-0x0000000009833000-memory.dmp

Filesize
204KB

Download
memory/3900-21-0x00000000097E0000-0x00000000097E1000-memory.dmp

Filesize
4KB

Download
memory/3900-22-0x0000000009BF0000-0x0000000009BF1000-memory.dmp

Filesize
4KB

Download
memory/3900-23-0x0000000009D40000-0x0000000009D41000-memory.dmp

Filesize
4KB

Download
memory/3900-24-0x00000000098B0000-0x00000000098B1000-memory.dmp

Filesize
4KB

Download
memory/3900-26-0x00000000098A0000-0x00000000098A1000-memory.dmp

Filesize
4KB

Download

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