buer | dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597

General

Target

dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe
Size

356KB
MD5

0ada5f2eec1893ee695758b75ebe351b
SHA1

554bc863b128b83ca14f20e6b08028d8a12795a0
SHA256

dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597
SHA512

0aed5d83d07d651f62527aff20438090f143f86b98d053ad2af7a14b7166980078e8383910a4e38fabb8fa0bb60fcc23e56dbc7a5750be0b5827c1fa2bed780b

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

https://kackdelar.top/

Signatures

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

Buer Loader 3 IoCs

Detects Buer loader in memory or disk.

resource	yara_rule
behavioral2/memory/2056-6-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral2/memory/2056-7-0x0000000040002E38-mapping.dmp	buer
behavioral2/memory/2056-8-0x0000000040000000-0x000000004000C000-memory.dmp	buer

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HJdyTuap.exe	dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe

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)	\??\A:	RegAsm.exe
File opened (read-only)	\??\F:	RegAsm.exe
File opened (read-only)	\??\M:	RegAsm.exe
File opened (read-only)	\??\Q:	RegAsm.exe
File opened (read-only)	\??\R:	RegAsm.exe
File opened (read-only)	\??\Z:	RegAsm.exe
File opened (read-only)	\??\B:	RegAsm.exe
File opened (read-only)	\??\G:	RegAsm.exe
File opened (read-only)	\??\L:	RegAsm.exe
File opened (read-only)	\??\T:	RegAsm.exe
File opened (read-only)	\??\X:	RegAsm.exe
File opened (read-only)	\??\E:	RegAsm.exe
File opened (read-only)	\??\H:	RegAsm.exe
File opened (read-only)	\??\K:	RegAsm.exe
File opened (read-only)	\??\N:	RegAsm.exe
File opened (read-only)	\??\V:	RegAsm.exe
File opened (read-only)	\??\W:	RegAsm.exe
File opened (read-only)	\??\I:	RegAsm.exe
File opened (read-only)	\??\J:	RegAsm.exe
File opened (read-only)	\??\O:	RegAsm.exe
File opened (read-only)	\??\P:	RegAsm.exe
File opened (read-only)	\??\S:	RegAsm.exe
File opened (read-only)	\??\U:	RegAsm.exe
File opened (read-only)	\??\Y:	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3956 set thread context of 2056	3956	dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe	74

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4020	powershell.exe
4020	powershell.exe
4020	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3956	dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4020	powershell.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3956 wrote to memory of 2056	3956	dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe	74
PID 3956 wrote to memory of 2056	3956	dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe	74
PID 3956 wrote to memory of 2056	3956	dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe	74
PID 3956 wrote to memory of 2056	3956	dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe	74
PID 2056 wrote to memory of 4020	2056	RegAsm.exe	76
PID 2056 wrote to memory of 4020	2056	RegAsm.exe	76
PID 2056 wrote to memory of 4020	2056	RegAsm.exe	76

C:\Users\Admin\AppData\Local\Temp\dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe
"C:\Users\Admin\AppData\Local\Temp\dee6a220c1a2a3a53361c929e903744b78a751b93c38405e629aae4c16d1e597.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3956
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Enumerates connected drives
  - Suspicious use of WriteProcessMemory
  PID:2056
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\322b286117c0dcd2bde0}"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4020

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/2056-6-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2056-8-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/3956-0-0x0000000073490000-0x0000000073B7E000-memory.dmp

Filesize
6.9MB

Download
memory/3956-1-0x0000000000F60000-0x0000000000F61000-memory.dmp

Filesize
4KB

Download
memory/3956-3-0x0000000005790000-0x0000000005791000-memory.dmp

Filesize
4KB

Download
memory/3956-4-0x0000000006080000-0x0000000006091000-memory.dmp

Filesize
68KB

Download
memory/4020-14-0x0000000006C00000-0x0000000006C01000-memory.dmp

Filesize
4KB

Download
memory/4020-18-0x0000000007C90000-0x0000000007C91000-memory.dmp

Filesize
4KB

Download
memory/4020-11-0x0000000004470000-0x0000000004471000-memory.dmp

Filesize
4KB

Download
memory/4020-12-0x0000000006C90000-0x0000000006C91000-memory.dmp

Filesize
4KB

Download
memory/4020-13-0x0000000006B60000-0x0000000006B61000-memory.dmp

Filesize
4KB

Download
memory/4020-15-0x0000000007510000-0x0000000007511000-memory.dmp

Filesize
4KB

Download
memory/4020-16-0x0000000007580000-0x0000000007581000-memory.dmp

Filesize
4KB

Download
memory/4020-17-0x0000000007340000-0x0000000007341000-memory.dmp

Filesize
4KB

Download
memory/4020-10-0x0000000073390000-0x0000000073A7E000-memory.dmp

Filesize
6.9MB

Download
memory/4020-19-0x0000000007CE0000-0x0000000007CE1000-memory.dmp

Filesize
4KB

Download
memory/4020-21-0x00000000089A0000-0x00000000089D3000-memory.dmp

Filesize
204KB

Download
memory/4020-28-0x0000000008980000-0x0000000008981000-memory.dmp

Filesize
4KB

Download
memory/4020-29-0x0000000008A00000-0x0000000008A01000-memory.dmp

Filesize
4KB

Download
memory/4020-30-0x0000000008ED0000-0x0000000008ED1000-memory.dmp

Filesize
4KB

Download
memory/4020-31-0x0000000008E70000-0x0000000008E71000-memory.dmp

Filesize
4KB

Download
memory/4020-33-0x0000000008E60000-0x0000000008E61000-memory.dmp

Filesize
4KB

Download

Analysis

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