78769e4085312f21cc67e77bfdd136f9a30d34e2d2a5d8870f2ebbeb7c3a8f7e

Analysis

max time kernel
152s
max time network
170s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 11:11

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General

Target

malware-analysis-writeups-master/bashar-bachir-chain/files/avastt.ps1
Size

360B
MD5

cfd1923ef62eda51c93b8b3599941acd
SHA1

ec8712a15560aa43ba4710ea574f5443ae5c5c5c
SHA256

2cd2d3823bacb5591d922756a072b4e934d42a471fce9fe2f5b2fd05fac0c660
SHA512

043f86e5448c4bcc941da02471797d3b863644502bdc36a9c97ab693b888eee2fafcf35e5ffbdce1afcaaf1b77869b50c49e49274ad7a0543b49a993d32ff5c6

Score

10^/10

evasion suricata

Malware Config

Signatures

suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
suricata

Blocklisted process makes network request 12 IoCs

Processes:

powershell.exe

flow	pid	process
4	1064	powershell.exe
7	1064	powershell.exe
8	1064	powershell.exe
9	1064	powershell.exe
12	1064	powershell.exe
13	1064	powershell.exe
14	1064	powershell.exe
15	1064	powershell.exe
16	1064	powershell.exe
17	1064	powershell.exe
19	1064	powershell.exe
20	1064	powershell.exe

Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

1064 powershell.exe

pid	process
1064	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

powershell.exe

description	pid	process
Token: SeDebugPrivilege	1064	powershell.exe
Token: 33	1064	powershell.exe
Token: SeIncBasePriorityPrivilege	1064	powershell.exe
Token: 33	1064	powershell.exe
Token: SeIncBasePriorityPrivilege	1064	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

powershell.exe

description	pid	process	target process
PID 1064 wrote to memory of 1180	1064	powershell.exe	netsh.exe
PID 1064 wrote to memory of 1180	1064	powershell.exe	netsh.exe
PID 1064 wrote to memory of 1180	1064	powershell.exe	netsh.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\malware-analysis-writeups-master\bashar-bachir-chain\files\avastt.ps1
1⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1064

C:\Windows\system32\netsh.exe
netsh firewall add allowedprogram "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "powershell.exe" ENABLE
2⤵
PID:1180

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

Replay Monitor

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Downloads

memory/1064-54-0x000007FEFC331000-0x000007FEFC333000-memory.dmp

Filesize
8KB

Download
memory/1064-55-0x000007FEF3E10000-0x000007FEF496D000-memory.dmp

Filesize
11.4MB

Download
memory/1064-56-0x0000000002814000-0x0000000002817000-memory.dmp

Filesize
12KB

Download
memory/1064-57-0x000000000281B000-0x000000000283A000-memory.dmp

Filesize
124KB

Download
memory/1064-58-0x000007FEEE290000-0x000007FEEF326000-memory.dmp

Filesize
16.6MB

Download
memory/1180-59-0x0000000000000000-mapping.dmp

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