buer | 1e06ef556ce681f14ed8fe9cfd3ebba0dfd2ec97602cfa39b99bec9a7437ed1a

General

Target

b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
Size

558KB
MD5

b1b1b46182236ad1ca363773c4a601df
SHA1

4563f3a7790e988c825796dfa0f3e1ec4ddb2d70
SHA256

1e06ef556ce681f14ed8fe9cfd3ebba0dfd2ec97602cfa39b99bec9a7437ed1a
SHA512

2f3f04cdb4c32f26ff86b09cb350934036f317413b0a494e4059af6d659719e8a129264a8c47bbcdfd88eb77060fb1030cca9d5f52f4f05c62e12ebfab99ed9f
SSDEEP

12288:zoy+ZLkjL3SzugvrnGPAMgpvsey0m9owzM:PE/u4GPnwv5y0m9oOM

Score

10^/10

buer execution loader upx

Malware Config

Extracted

Family

buer

C2

https://bankcreditsign.com/

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.

loader

resource	yara_rule
behavioral2/memory/3756-1-0x00000000024D0000-0x0000000002530000-memory.dmp	buer
behavioral2/memory/3756-5-0x0000000040000000-0x000000004005D000-memory.dmp	buer
behavioral2/memory/3756-8-0x00000000006D0000-0x000000000072E000-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
2752	powershell.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/3756-56-0x0000000000400000-0x00000000004C2000-memory.dmp	upx

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)	\??\L:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\N:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\Q:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\R:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\U:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\G:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\I:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\M:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\P:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\V:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\Y:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\H:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\J:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\W:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\X:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\Z:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\A:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\O:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\K:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\S:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\T:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\B:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
File opened (read-only)	\??\E:	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2752	powershell.exe
2752	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2752	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3756 wrote to memory of 2752	3756	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe	82
PID 3756 wrote to memory of 2752	3756	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe	82
PID 3756 wrote to memory of 2752	3756	b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe	82

C:\Users\Admin\AppData\Local\Temp\b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b1b1b46182236ad1ca363773c4a601df_JaffaCakes118.exe"
1⤵
- Enumerates connected drives
- Suspicious use of WriteProcessMemory
PID:3756
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command "& {Add-MpPreference -ExclusionPath C:\ProgramData\bd4b0493fe9a5867aa6d}"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2ggifpbk.ldb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2752-40-0x0000000074D30000-0x00000000754E0000-memory.dmp

Filesize
7.7MB

Download
memory/2752-52-0x0000000007620000-0x0000000007628000-memory.dmp

Filesize
32KB

Download
memory/2752-28-0x00000000060C0000-0x000000000610C000-memory.dmp

Filesize
304KB

Download
memory/2752-9-0x0000000074D3E000-0x0000000074D3F000-memory.dmp

Filesize
4KB

Download
memory/2752-10-0x0000000002A60000-0x0000000002A96000-memory.dmp

Filesize
216KB

Download
memory/2752-11-0x00000000052F0000-0x0000000005918000-memory.dmp

Filesize
6.2MB

Download
memory/2752-30-0x0000000070B50000-0x0000000070B9C000-memory.dmp

Filesize
304KB

Download
memory/2752-13-0x0000000074D30000-0x00000000754E0000-memory.dmp

Filesize
7.7MB

Download
memory/2752-14-0x0000000005280000-0x00000000052A2000-memory.dmp

Filesize
136KB

Download
memory/2752-15-0x0000000005990000-0x00000000059F6000-memory.dmp

Filesize
408KB

Download
memory/2752-55-0x0000000074D30000-0x00000000754E0000-memory.dmp

Filesize
7.7MB

Download
memory/2752-16-0x0000000005A00000-0x0000000005A66000-memory.dmp

Filesize
408KB

Download
memory/2752-22-0x0000000005A70000-0x0000000005DC4000-memory.dmp

Filesize
3.3MB

Download
memory/2752-27-0x0000000006030000-0x000000000604E000-memory.dmp

Filesize
120KB

Download
memory/2752-51-0x00000000076F0000-0x000000000770A000-memory.dmp

Filesize
104KB

Download
memory/2752-50-0x00000000075E0000-0x00000000075F4000-memory.dmp

Filesize
80KB

Download
memory/2752-12-0x0000000074D30000-0x00000000754E0000-memory.dmp

Filesize
7.7MB

Download
memory/2752-41-0x0000000006600000-0x000000000661E000-memory.dmp

Filesize
120KB

Download
memory/2752-42-0x0000000074D30000-0x00000000754E0000-memory.dmp

Filesize
7.7MB

Download
memory/2752-29-0x00000000071F0000-0x0000000007222000-memory.dmp

Filesize
200KB

Download
memory/2752-43-0x0000000007230000-0x00000000072D3000-memory.dmp

Filesize
652KB

Download
memory/2752-44-0x00000000079E0000-0x000000000805A000-memory.dmp

Filesize
6.5MB

Download
memory/2752-45-0x00000000073A0000-0x00000000073BA000-memory.dmp

Filesize
104KB

Download
memory/2752-46-0x0000000007400000-0x000000000740A000-memory.dmp

Filesize
40KB

Download
memory/2752-47-0x0000000007630000-0x00000000076C6000-memory.dmp

Filesize
600KB

Download
memory/2752-48-0x00000000075A0000-0x00000000075B1000-memory.dmp

Filesize
68KB

Download
memory/2752-49-0x00000000075D0000-0x00000000075DE000-memory.dmp

Filesize
56KB

Download
memory/3756-5-0x0000000040000000-0x000000004005D000-memory.dmp

Filesize
372KB

Download
memory/3756-56-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/3756-0-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/3756-1-0x00000000024D0000-0x0000000002530000-memory.dmp

Filesize
384KB

Download
memory/3756-8-0x00000000006D0000-0x000000000072E000-memory.dmp

Filesize
376KB

Download

Analysis

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