buer | 9ec189cd724b3f7007266e5bae55a5b282849f3221df6b2e2b9aad3390594c17

General

Target

b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
Size

1.3MB
MD5

87f0180d068e273e554db3e2c5ed34b8
SHA1

b60648cb7e2f555be32ca13ef38cc2267e062e1c
SHA256

9ec189cd724b3f7007266e5bae55a5b282849f3221df6b2e2b9aad3390594c17
SHA512

ef51441152a84b2a4481f11eb2a149d957f87d0c88cd0a9e1cf88924dc5587e43250725fd010147989550c4cbf74532a9e251ad036b71c17e70d809811fdf402

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

https://supsuncorner.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/4036-0-0x0000000000F50000-0x0000000000FB0000-memory.dmp	buer
behavioral2/memory/4036-1-0x0000000040000000-0x000000004005D000-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)	\??\V:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\Y:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\I:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\K:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\O:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\S:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\U:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\F:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\L:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\M:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\R:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\T:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\W:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\X:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\B:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\E:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\G:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\N:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\P:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\Z:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\A:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\H:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\J:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
File opened (read-only)	\??\Q:	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2628	powershell.exe
2628	powershell.exe
2628	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2628	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 2628	4036	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe	72
PID 4036 wrote to memory of 2628	4036	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe	72
PID 4036 wrote to memory of 2628	4036	b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe	72

C:\Users\Admin\AppData\Local\Temp\b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe
"C:\Users\Admin\AppData\Local\Temp\b60648cb7e2f555be32ca13ef38cc2267e062e1c.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\d34099ab2f5c09789796}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2628

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/2628-8-0x0000000007930000-0x0000000007931000-memory.dmp

Filesize
4KB

Download
memory/2628-26-0x0000000009210000-0x0000000009211000-memory.dmp

Filesize
4KB

Download
memory/2628-9-0x00000000079A0000-0x00000000079A1000-memory.dmp

Filesize
4KB

Download
memory/2628-3-0x00000000738D0000-0x0000000073FBE000-memory.dmp

Filesize
6.9MB

Download
memory/2628-4-0x0000000004870000-0x0000000004871000-memory.dmp

Filesize
4KB

Download
memory/2628-5-0x0000000007120000-0x0000000007121000-memory.dmp

Filesize
4KB

Download
memory/2628-6-0x00000000070B0000-0x00000000070B1000-memory.dmp

Filesize
4KB

Download
memory/2628-7-0x00000000078C0000-0x00000000078C1000-memory.dmp

Filesize
4KB

Download
memory/2628-24-0x0000000009230000-0x0000000009231000-memory.dmp

Filesize
4KB

Download
memory/2628-11-0x0000000008200000-0x0000000008201000-memory.dmp

Filesize
4KB

Download
memory/2628-10-0x0000000007080000-0x0000000007081000-memory.dmp

Filesize
4KB

Download
memory/2628-12-0x0000000008060000-0x0000000008061000-memory.dmp

Filesize
4KB

Download
memory/2628-14-0x0000000008DE0000-0x0000000008E13000-memory.dmp

Filesize
204KB

Download
memory/2628-21-0x0000000008DC0000-0x0000000008DC1000-memory.dmp

Filesize
4KB

Download
memory/2628-22-0x0000000008F60000-0x0000000008F61000-memory.dmp

Filesize
4KB

Download
memory/2628-23-0x0000000009380000-0x0000000009381000-memory.dmp

Filesize
4KB

Download
memory/4036-1-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/4036-0-0x0000000000F50000-0x0000000000FB0000-memory.dmp

Filesize
384KB

Download

Analysis

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