buer | e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd

General

Target

e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
Size

577KB
MD5

7d8f0a53352c9188acef922dbecfa588
SHA1

dc6115bdc6d63f476203e54e40cb35df72d4014d
SHA256

e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd
SHA512

6dd3b5d633344f0ee5d59589c28f45ab3647c5d41da27fe39f3025b826b2043a4fc094862762d4080d6546acac4996d25484501b09dc18da597dfb42e6600fa6

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

https://178.62.46.155/

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/728-0-0x00000000001F0000-0x00000000001FF000-memory.dmp	buer
behavioral2/memory/728-1-0x0000000040000000-0x000000004000C000-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)	\??\W:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\X:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\A:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\F:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\G:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\I:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\P:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\Q:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\B:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\E:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\L:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\O:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\S:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\U:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\J:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\T:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\V:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\Y:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\H:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\K:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\M:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\N:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\R:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
File opened (read-only)	\??\Z:	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
488	powershell.exe
488	powershell.exe
488	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	488	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 728 wrote to memory of 488	728	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe	76
PID 728 wrote to memory of 488	728	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe	76
PID 728 wrote to memory of 488	728	e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe	76

C:\Users\Admin\AppData\Local\Temp\e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe
"C:\Users\Admin\AppData\Local\Temp\e12b58b042e361d227d4cc3e60e5b5c8ef49c7f70c306d1159c71a7eb335f5cd.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:728
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\abceac9bad200fd63e20}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:488

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/488-8-0x00000000082F0000-0x00000000082F1000-memory.dmp

Filesize
4KB

Download
memory/488-26-0x0000000009CD0000-0x0000000009CD1000-memory.dmp

Filesize
4KB

Download
memory/488-9-0x0000000008360000-0x0000000008361000-memory.dmp

Filesize
4KB

Download
memory/488-3-0x00000000734B0000-0x0000000073B9E000-memory.dmp

Filesize
6.9MB

Download
memory/488-4-0x0000000004F50000-0x0000000004F51000-memory.dmp

Filesize
4KB

Download
memory/488-5-0x0000000007A70000-0x0000000007A71000-memory.dmp

Filesize
4KB

Download
memory/488-6-0x00000000078C0000-0x00000000078C1000-memory.dmp

Filesize
4KB

Download
memory/488-7-0x00000000080A0000-0x00000000080A1000-memory.dmp

Filesize
4KB

Download
memory/488-24-0x0000000009CE0000-0x0000000009CE1000-memory.dmp

Filesize
4KB

Download
memory/488-11-0x0000000008B10000-0x0000000008B11000-memory.dmp

Filesize
4KB

Download
memory/488-10-0x0000000008770000-0x0000000008771000-memory.dmp

Filesize
4KB

Download
memory/488-12-0x0000000008A50000-0x0000000008A51000-memory.dmp

Filesize
4KB

Download
memory/488-14-0x0000000009840000-0x0000000009873000-memory.dmp

Filesize
204KB

Download
memory/488-21-0x00000000097F0000-0x00000000097F1000-memory.dmp

Filesize
4KB

Download
memory/488-22-0x0000000009B70000-0x0000000009B71000-memory.dmp

Filesize
4KB

Download
memory/488-23-0x0000000009D40000-0x0000000009D41000-memory.dmp

Filesize
4KB

Download
memory/728-1-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/728-0-0x00000000001F0000-0x00000000001FF000-memory.dmp

Filesize
60KB

Download

Analysis

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