buer | a6cf85f38f11e82be3fbabc2f7ee0d07f608f30ceb92654ec2168c4fcfad56e0

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
15-06-2024 01:59

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General

Target

ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe
Size

259KB
MD5

ac8348dd8319365d4857b1e20715c6da
SHA1

5c5b1008a7a96015f2588fd60ddc0b4739f74fb5
SHA256

a6cf85f38f11e82be3fbabc2f7ee0d07f608f30ceb92654ec2168c4fcfad56e0
SHA512

eed7640b28d4b023cd4c252ed812820221aca61f969ca2e6d5f59aad5532fae07d17401272dd36a3c49641136fa8a95d1e1d801076deb8eac97222f506f0ac86
SSDEEP

6144:nQ6ixI8UKltZMbvRrUjZMlbHHOLGqJ/89GEgr/KLUygLMh:Q6ie8UKl7M7RA1MRn5t9wrSLbK

Score

10^/10

buer execution loader

Malware Config

Extracted

Family

buer

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
behavioral2/memory/2820-5-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral2/memory/2820-10-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral2/memory/2820-8-0x0000000040000000-0x000000004000C000-memory.dmp	buer
behavioral2/memory/2820-11-0x0000000040000000-0x000000004000C000-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
2524	powershell.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)	\??\E:	RegAsm.exe
File opened (read-only)	\??\L:	RegAsm.exe
File opened (read-only)	\??\N:	RegAsm.exe
File opened (read-only)	\??\W:	RegAsm.exe
File opened (read-only)	\??\G:	RegAsm.exe
File opened (read-only)	\??\M:	RegAsm.exe
File opened (read-only)	\??\O:	RegAsm.exe
File opened (read-only)	\??\P:	RegAsm.exe
File opened (read-only)	\??\Q:	RegAsm.exe
File opened (read-only)	\??\S:	RegAsm.exe
File opened (read-only)	\??\U:	RegAsm.exe
File opened (read-only)	\??\H:	RegAsm.exe
File opened (read-only)	\??\R:	RegAsm.exe
File opened (read-only)	\??\X:	RegAsm.exe
File opened (read-only)	\??\A:	RegAsm.exe
File opened (read-only)	\??\B:	RegAsm.exe
File opened (read-only)	\??\I:	RegAsm.exe
File opened (read-only)	\??\J:	RegAsm.exe
File opened (read-only)	\??\K:	RegAsm.exe
File opened (read-only)	\??\T:	RegAsm.exe
File opened (read-only)	\??\V:	RegAsm.exe
File opened (read-only)	\??\Y:	RegAsm.exe
File opened (read-only)	\??\Z:	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 980 set thread context of 2820	980	ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe	86

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2524	powershell.exe
2524	powershell.exe
2820	RegAsm.exe
2820	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
980	ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2524	powershell.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 980 wrote to memory of 2820	980	ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe	86
PID 980 wrote to memory of 2820	980	ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe	86
PID 980 wrote to memory of 2820	980	ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe	86
PID 980 wrote to memory of 2820	980	ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe	86
PID 2820 wrote to memory of 2524	2820	RegAsm.exe	87
PID 2820 wrote to memory of 2524	2820	RegAsm.exe	87
PID 2820 wrote to memory of 2524	2820	RegAsm.exe	87

C:\Users\Admin\AppData\Local\Temp\ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ac8348dd8319365d4857b1e20715c6da_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:980
- 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 behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2820
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\16c6fbaa85473dcbe428}"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kbksyo5u.arj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/980-9-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/980-1-0x0000000000820000-0x0000000000868000-memory.dmp

Filesize
288KB

Download
memory/980-2-0x0000000005260000-0x00000000052F2000-memory.dmp

Filesize
584KB

Download
memory/980-3-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/980-4-0x0000000005B50000-0x0000000005B66000-memory.dmp

Filesize
88KB

Download
memory/980-0-0x0000000074B5E000-0x0000000074B5F000-memory.dmp

Filesize
4KB

Download
memory/2524-33-0x0000000070520000-0x000000007056C000-memory.dmp

Filesize
304KB

Download
memory/2524-32-0x00000000065C0000-0x00000000065F2000-memory.dmp

Filesize
200KB

Download
memory/2524-59-0x0000000074B10000-0x00000000752C0000-memory.dmp

Filesize
7.7MB

Download
memory/2524-13-0x0000000004A40000-0x0000000004A76000-memory.dmp

Filesize
216KB

Download
memory/2524-12-0x0000000074B1E000-0x0000000074B1F000-memory.dmp

Filesize
4KB

Download
memory/2524-15-0x00000000051E0000-0x0000000005808000-memory.dmp

Filesize
6.2MB

Download
memory/2524-14-0x0000000074B10000-0x00000000752C0000-memory.dmp

Filesize
7.7MB

Download
memory/2524-17-0x0000000074B10000-0x00000000752C0000-memory.dmp

Filesize
7.7MB

Download
memory/2524-16-0x0000000005840000-0x0000000005862000-memory.dmp

Filesize
136KB

Download
memory/2524-19-0x00000000059C0000-0x0000000005A26000-memory.dmp

Filesize
408KB

Download
memory/2524-18-0x00000000058E0000-0x0000000005946000-memory.dmp

Filesize
408KB

Download
memory/2524-56-0x0000000007630000-0x0000000007638000-memory.dmp

Filesize
32KB

Download
memory/2524-29-0x0000000005B30000-0x0000000005E84000-memory.dmp

Filesize
3.3MB

Download
memory/2524-30-0x0000000005FE0000-0x0000000005FFE000-memory.dmp

Filesize
120KB

Download
memory/2524-31-0x0000000006030000-0x000000000607C000-memory.dmp

Filesize
304KB

Download
memory/2524-55-0x0000000007650000-0x000000000766A000-memory.dmp

Filesize
104KB

Download
memory/2524-44-0x00000000071C0000-0x00000000071DE000-memory.dmp

Filesize
120KB

Download
memory/2524-46-0x0000000074B10000-0x00000000752C0000-memory.dmp

Filesize
7.7MB

Download
memory/2524-45-0x00000000071E0000-0x0000000007283000-memory.dmp

Filesize
652KB

Download
memory/2524-43-0x0000000074B10000-0x00000000752C0000-memory.dmp

Filesize
7.7MB

Download
memory/2524-54-0x0000000007550000-0x0000000007564000-memory.dmp

Filesize
80KB

Download
memory/2524-47-0x0000000074B10000-0x00000000752C0000-memory.dmp

Filesize
7.7MB

Download
memory/2524-48-0x0000000007950000-0x0000000007FCA000-memory.dmp

Filesize
6.5MB

Download
memory/2524-49-0x0000000007310000-0x000000000732A000-memory.dmp

Filesize
104KB

Download
memory/2524-50-0x0000000007380000-0x000000000738A000-memory.dmp

Filesize
40KB

Download
memory/2524-51-0x0000000007590000-0x0000000007626000-memory.dmp

Filesize
600KB

Download
memory/2524-52-0x0000000007510000-0x0000000007521000-memory.dmp

Filesize
68KB

Download
memory/2524-53-0x0000000007540000-0x000000000754E000-memory.dmp

Filesize
56KB

Download
memory/2820-5-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2820-8-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2820-10-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download
memory/2820-11-0x0000000040000000-0x000000004000C000-memory.dmp

Filesize
48KB

Download