buer | f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb

General

Target

f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
Size

1.2MB
MD5

dbeda20b182f67b85630a839a0599cf4
SHA1

f4c705bf3b933cc8b20e1443f23a595506f49c5e
SHA256

f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb
SHA512

c54ec86e4af44b46c67a5f17b2a33ac617247c53ec015c2ede35b362780d35fb657921e443cbdbc52c9640df31652fcf29e6c36890129322c4e364b396f26e23

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

https://housewestbefore.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/1156-0-0x0000000002210000-0x0000000002270000-memory.dmp	buer
behavioral1/memory/1156-1-0x0000000040000000-0x000000004005D000-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:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\M:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\N:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\T:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\V:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\W:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\I:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\H:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\J:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\S:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\X:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\Y:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\Z:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\B:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\F:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\G:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\P:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\Q:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\A:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\K:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\O:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\R:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\U:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
File opened (read-only)	\??\E:	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
768	powershell.exe
768	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	768	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1156 wrote to memory of 768	1156	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe	25
PID 1156 wrote to memory of 768	1156	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe	25
PID 1156 wrote to memory of 768	1156	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe	25
PID 1156 wrote to memory of 768	1156	f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe	25

C:\Users\Admin\AppData\Local\Temp\f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe
"C:\Users\Admin\AppData\Local\Temp\f61c05d773f31637ba2d7dd4a7a30364c08205deb9620723f0f79cd94106ccfb.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:1156
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\1f9c1db019ea6c121b09}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:768

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/768-6-0x0000000002540000-0x0000000002541000-memory.dmp

Filesize
4KB

Download
memory/768-10-0x0000000005620000-0x0000000005621000-memory.dmp

Filesize
4KB

Download
memory/768-3-0x00000000739A0000-0x000000007408E000-memory.dmp

Filesize
6.9MB

Download
memory/768-4-0x0000000000B80000-0x0000000000B81000-memory.dmp

Filesize
4KB

Download
memory/768-5-0x00000000048F0000-0x00000000048F1000-memory.dmp

Filesize
4KB

Download
memory/768-39-0x0000000006290000-0x0000000006291000-memory.dmp

Filesize
4KB

Download
memory/768-7-0x0000000002850000-0x0000000002851000-memory.dmp

Filesize
4KB

Download
memory/768-38-0x0000000006280000-0x0000000006281000-memory.dmp

Filesize
4KB

Download
memory/768-15-0x0000000005670000-0x0000000005671000-memory.dmp

Filesize
4KB

Download
memory/768-16-0x0000000005720000-0x0000000005721000-memory.dmp

Filesize
4KB

Download
memory/768-23-0x00000000061C0000-0x00000000061C1000-memory.dmp

Filesize
4KB

Download
memory/768-24-0x00000000055E0000-0x00000000055E1000-memory.dmp

Filesize
4KB

Download
memory/1156-0-0x0000000002210000-0x0000000002270000-memory.dmp

Filesize
384KB

Download
memory/1156-1-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download

Analysis

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