buer | 1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3

General

Target

1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe
Size

40KB
MD5

b808bcbb1d9b94a4a71899964255ce0e
SHA1

c5e899db34a976f8396cdde8044ebb5ca67a513f
SHA256

1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3
SHA512

6f1c8f6fd0ad1ded7a5ab3e39a45f0ca22bc12100117b3a58f613184069128e7e21b7685262f3647408c6871ea8a5e2a07e53379634f65a45b71552d69620ff9

Score

10^/10

buer loader persistence

Malware Config

Extracted

Family

buer

C2

frrnq8--imp_j_i,fi-

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer

Buer Loader 4 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral1/files/0x000a0000000122be-55.dat	buer
behavioral1/files/0x000a0000000122be-58.dat	buer
behavioral1/files/0x000a0000000122be-56.dat	buer
behavioral1/files/0x000a0000000122be-60.dat	buer

Executes dropped EXE 1 IoCs

pid	Process
2040	manager.exe

Deletes itself 1 IoCs

pid	Process
2040	manager.exe

Loads dropped DLL 2 IoCs

pid	Process
960	1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe
960	1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	manager.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\ActiveX Component = "C:\\Users\\Admin\\AppData\\Roaming\\ActiveX\\manager.exe"	manager.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2040	manager.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 960 wrote to memory of 2040	960	1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe	28
PID 960 wrote to memory of 2040	960	1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe	28
PID 960 wrote to memory of 2040	960	1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe	28
PID 960 wrote to memory of 2040	960	1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe	28
PID 2040 wrote to memory of 2000	2040	manager.exe	29
PID 2040 wrote to memory of 2000	2040	manager.exe	29
PID 2040 wrote to memory of 2000	2040	manager.exe	29
PID 2040 wrote to memory of 2000	2040	manager.exe	29

C:\Users\Admin\AppData\Local\Temp\1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe
"C:\Users\Admin\AppData\Local\Temp\1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:960
- C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
  C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe "C:\Users\Admin\AppData\Local\Temp\1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3.exe" ensgJJ
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2040
- - C:\Windows\SysWOW64\secinit.exe
    C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
    3⤵
    PID:2000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
40KB

MD5
b808bcbb1d9b94a4a71899964255ce0e

SHA1
c5e899db34a976f8396cdde8044ebb5ca67a513f

SHA256
1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3

SHA512
6f1c8f6fd0ad1ded7a5ab3e39a45f0ca22bc12100117b3a58f613184069128e7e21b7685262f3647408c6871ea8a5e2a07e53379634f65a45b71552d69620ff9

Download Submit
C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
40KB

MD5
b808bcbb1d9b94a4a71899964255ce0e

SHA1
c5e899db34a976f8396cdde8044ebb5ca67a513f

SHA256
1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3

SHA512
6f1c8f6fd0ad1ded7a5ab3e39a45f0ca22bc12100117b3a58f613184069128e7e21b7685262f3647408c6871ea8a5e2a07e53379634f65a45b71552d69620ff9

Download Submit
\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
40KB

MD5
b808bcbb1d9b94a4a71899964255ce0e

SHA1
c5e899db34a976f8396cdde8044ebb5ca67a513f

SHA256
1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3

SHA512
6f1c8f6fd0ad1ded7a5ab3e39a45f0ca22bc12100117b3a58f613184069128e7e21b7685262f3647408c6871ea8a5e2a07e53379634f65a45b71552d69620ff9

Download Submit
\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
40KB

MD5
b808bcbb1d9b94a4a71899964255ce0e

SHA1
c5e899db34a976f8396cdde8044ebb5ca67a513f

SHA256
1f8595d066ee69e7454b30b718102bbd04122ba8a5bab1e9d5f4532b7a7305a3

SHA512
6f1c8f6fd0ad1ded7a5ab3e39a45f0ca22bc12100117b3a58f613184069128e7e21b7685262f3647408c6871ea8a5e2a07e53379634f65a45b71552d69620ff9

Download Submit
memory/960-54-0x00000000761F1000-0x00000000761F3000-memory.dmp

Filesize
8KB

Download

Analysis

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