buer | 68a83d0a3bfcd1bcebf35eeba2bd778b2b64516f73cb2932ad9e6e4667dd9781

General

Target

c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe
Size

353KB
MD5

c1b6185f5ba6a3d5c4e1017b1b684492
SHA1

005ab0f0d9ec20c7dbb4512489f17bcb7494fe0e
SHA256

68a83d0a3bfcd1bcebf35eeba2bd778b2b64516f73cb2932ad9e6e4667dd9781
SHA512

23766708489576355d3e2893f59ef1179cc3bbf6379a48709f7bd3bd8aa9bc7bd2d527983f5d8fa23cf7e4a114f8f9c65882b949133b027b4be97e4d05a44dc4
SSDEEP

6144:kyNp69yZH/0EkNrlXLp+Pe+zXLry08lY5W99A3ywES2:pNvcEkNFL4PeP5lYUU31ES2

Score

10^/10

buer discovery execution 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 4 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral1/memory/768-5-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral1/memory/768-7-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral1/memory/768-8-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral1/memory/768-9-0x0000000040000000-0x000000004000C000-memory.dmp	buer

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3048	powershell.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HJdyTuap.exe	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe

Enumerates connected drives 3 TTPs 23 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)	\??\P:	RegAsm.exe
File opened (read-only)	\??\U:	RegAsm.exe
File opened (read-only)	\??\V:	RegAsm.exe
File opened (read-only)	\??\Y:	RegAsm.exe
File opened (read-only)	\??\I:	RegAsm.exe
File opened (read-only)	\??\N:	RegAsm.exe
File opened (read-only)	\??\J:	RegAsm.exe
File opened (read-only)	\??\K:	RegAsm.exe
File opened (read-only)	\??\L:	RegAsm.exe
File opened (read-only)	\??\M:	RegAsm.exe
File opened (read-only)	\??\R:	RegAsm.exe
File opened (read-only)	\??\W:	RegAsm.exe
File opened (read-only)	\??\A:	RegAsm.exe
File opened (read-only)	\??\G:	RegAsm.exe
File opened (read-only)	\??\Z:	RegAsm.exe
File opened (read-only)	\??\S:	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)	\??\Q:	RegAsm.exe
File opened (read-only)	\??\B:	RegAsm.exe
File opened (read-only)	\??\O:	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1000 set thread context of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3048	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3048	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1000 wrote to memory of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31
PID 1000 wrote to memory of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31
PID 1000 wrote to memory of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31
PID 1000 wrote to memory of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31
PID 1000 wrote to memory of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31
PID 1000 wrote to memory of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31
PID 1000 wrote to memory of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31
PID 1000 wrote to memory of 768	1000	c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe	31
PID 768 wrote to memory of 3048	768	RegAsm.exe	32
PID 768 wrote to memory of 3048	768	RegAsm.exe	32
PID 768 wrote to memory of 3048	768	RegAsm.exe	32
PID 768 wrote to memory of 3048	768	RegAsm.exe	32
PID 768 wrote to memory of 3048	768	RegAsm.exe	32
PID 768 wrote to memory of 3048	768	RegAsm.exe	32
PID 768 wrote to memory of 3048	768	RegAsm.exe	32

C:\Users\Admin\AppData\Local\Temp\c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c1b6185f5ba6a3d5c4e1017b1b684492_JaffaCakes118.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1000
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:768
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\e8e4202a1eff168969cf}"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3048

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/768-5-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/768-7-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/768-8-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/768-9-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/1000-0-0x0000000001060000-0x00000000010BE000-memory.dmp

Filesize
376KB

Download
memory/1000-1-0x0000000000920000-0x0000000000936000-memory.dmp

Filesize
88KB

Download
memory/1000-3-0x0000000001040000-0x0000000001043000-memory.dmp

Filesize
12KB

Download
memory/1000-4-0x0000000001050000-0x0000000001053000-memory.dmp

Filesize
12KB

Download

Analysis

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