Malware Analysis Report

2024-08-06 11:00

Sample ID 240320-ej4byagb42
Target 72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d
SHA256 72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d
Tags
cobaltstrike 100000000 backdoor trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d

Threat Level: Known bad

The file 72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d was found to be: Known bad.

Malicious Activity Summary

cobaltstrike 100000000 backdoor trojan

Cobaltstrike

Executes dropped EXE

Loads dropped DLL

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-03-20 03:59

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-20 03:59

Reported

2024-03-20 04:01

Platform

win7-20240221-en

Max time kernel

141s

Max time network

160s

Command Line

"C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe"

Signatures

Cobaltstrike

trojan backdoor cobaltstrike

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Public\Word.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe N/A
N/A N/A C:\Users\Public\Word.exe N/A
N/A N/A C:\Users\Public\Word.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2428 wrote to memory of 2280 N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe C:\Users\Public\Word.exe
PID 2428 wrote to memory of 2280 N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe C:\Users\Public\Word.exe
PID 2428 wrote to memory of 2280 N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe C:\Users\Public\Word.exe
PID 2428 wrote to memory of 2280 N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe C:\Users\Public\Word.exe

Processes

C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe

"C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe"

C:\Users\Public\Word.exe

C:\Users\Public

Network

Country Destination Domain Proto
US 8.8.8.8:53 service-maoif4bl-1313584875.bj.apigw.tencentcs.com udp
CN 49.233.94.45:443 service-maoif4bl-1313584875.bj.apigw.tencentcs.com tcp
CN 49.233.94.196:443 service-maoif4bl-1313584875.bj.apigw.tencentcs.com tcp
CN 49.233.94.45:443 service-maoif4bl-1313584875.bj.apigw.tencentcs.com tcp
CN 49.233.94.196:443 service-maoif4bl-1313584875.bj.apigw.tencentcs.com tcp

Files

memory/2428-0-0x0000000003080000-0x0000000003180000-memory.dmp

\Users\Public\Word.exe

MD5 070901b5fc726e6d4ae33fa4eeeb2c03
SHA1 83926f16af21b4d54dbb16f6abbd165e75bee847
SHA256 5a9e9850dd73e015255169f78a13d4b330803d66d42749363280a9322ea106c5
SHA512 fa040576811a1f7de2c85c1132eda725f1429ac1f0dd756a5f9ee16613998b3faca21a4957d18401b065226669fb289186017bd62ae37ad2dd5ae6c10ec0e7fe

C:\Users\Public\Word.exe

MD5 c5bb77c570d8363bb1b0893241998769
SHA1 1333af7a3c84b261e688ff3609cd7d69f1e1c2fd
SHA256 72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d
SHA512 2247c00a842e7448e98f37888b72be393bfef3881c3ac2d3533eb4352320e3fbe89120054848f97b19012289f8e2ade57f03e08490e79c8a7ee0d5d6a7c2ccd6

C:\Users\Public\Word.exe

MD5 fa9c1325c0e8b4cfa6b45fe4e3714ccb
SHA1 9a8256b03ed118f185df6e67d209474f95faddcd
SHA256 692faf50e74bf3faf10061347aa1ed9a067d5a44b0087b38cba511882d932f60
SHA512 d69c654c5e7d8aca3bc9ad69ec9572e1abcf8d4a988fc115893f26746615a340cfd5f033c76b9771df5ed5fb5fdcc0bebf1c135d4ff7c99aab1a45acc811c6d5

memory/2280-10-0x0000000003260000-0x0000000003360000-memory.dmp

memory/2280-11-0x0000000003260000-0x0000000003360000-memory.dmp

memory/2428-12-0x0000000003080000-0x0000000003180000-memory.dmp

memory/2280-13-0x0000000003260000-0x0000000003360000-memory.dmp

memory/2280-14-0x00000000007C0000-0x00000000007F4000-memory.dmp

memory/2280-15-0x0000000000800000-0x000000000083E000-memory.dmp

memory/2280-16-0x0000000000800000-0x000000000083E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-20 03:59

Reported

2024-03-20 04:01

Platform

win10v2004-20240226-en

Max time kernel

144s

Max time network

167s

Command Line

"C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe"

Signatures

Cobaltstrike

trojan backdoor cobaltstrike

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Public\Word.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe N/A
N/A N/A C:\Users\Public\Word.exe N/A
N/A N/A C:\Users\Public\Word.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1168 wrote to memory of 1092 N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe C:\Users\Public\Word.exe
PID 1168 wrote to memory of 1092 N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe C:\Users\Public\Word.exe
PID 1168 wrote to memory of 1092 N/A C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe C:\Users\Public\Word.exe

Processes

C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe

"C:\Users\Admin\AppData\Local\Temp\72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d.exe"

C:\Users\Public\Word.exe

C:\Users\Public

Network

Country Destination Domain Proto
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 174.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 service-maoif4bl-1313584875.bj.apigw.tencentcs.com udp
CN 49.233.94.196:443 service-maoif4bl-1313584875.bj.apigw.tencentcs.com tcp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
CN 49.233.94.45:443 service-maoif4bl-1313584875.bj.apigw.tencentcs.com tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
CN 49.233.94.196:443 service-maoif4bl-1313584875.bj.apigw.tencentcs.com tcp
CN 49.233.94.45:443 service-maoif4bl-1313584875.bj.apigw.tencentcs.com tcp
US 8.8.8.8:53 89.16.208.104.in-addr.arpa udp

Files

memory/1168-0-0x0000000003270000-0x0000000003370000-memory.dmp

C:\Users\Public\Word.exe

MD5 c5bb77c570d8363bb1b0893241998769
SHA1 1333af7a3c84b261e688ff3609cd7d69f1e1c2fd
SHA256 72dd741963daa67d9c5959545c3041ac12a40f836f76abf146ac17f41970f77d
SHA512 2247c00a842e7448e98f37888b72be393bfef3881c3ac2d3533eb4352320e3fbe89120054848f97b19012289f8e2ade57f03e08490e79c8a7ee0d5d6a7c2ccd6

memory/1092-6-0x00000000034B0000-0x00000000035B0000-memory.dmp

memory/1168-7-0x0000000003270000-0x0000000003370000-memory.dmp

memory/1092-8-0x00000000034B0000-0x00000000035B0000-memory.dmp

memory/1092-9-0x00000000034B0000-0x00000000035B0000-memory.dmp

memory/1092-10-0x00000000009B0000-0x00000000009E4000-memory.dmp

memory/1092-11-0x0000000000A10000-0x0000000000A4E000-memory.dmp

memory/1092-12-0x0000000000A10000-0x0000000000A4E000-memory.dmp