9ff72a8d819acd73ac211c5e7e9255a05eecbe3bfcf037d5fa020b25396b6ca9

Analysis

max time kernel
148s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 08:59 UTC

Sharing

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Report Analysis Logs

General

Target

13f33ea82bc9e4e2aa380a044dcab53b.exe
Size

19KB
MD5

13f33ea82bc9e4e2aa380a044dcab53b
SHA1

f0c17221d7098fe713d091ae074b32dc3a7a08ef
SHA256

9ff72a8d819acd73ac211c5e7e9255a05eecbe3bfcf037d5fa020b25396b6ca9
SHA512

cfcdf26de85a33a26ca7a0a6fbf25e780ddf480b253749fc254e01d82cadad6fa419d75906fefcbccdc185117acb9dadeebf6a4a243738366c0f0bd1f62acb2e
SSDEEP

192:4w3YuHqnNLBZOpEHqySjGfhQh8SgB53ppUoB0XZ/2zu/KHYHh+FopyF2oRlOxt6x:P3YSqMpEHq22q3ppxAune2oEF2oRlFQY

Score

7^/10

persistence upx

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
3964	13f33ea82bc9e4e2aa380a044dcab53b.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3964-0-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/3964-11-0x0000000000400000-0x0000000000412000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\rewkljlpw = "C:\\Windows\\rewkljlpw.exe"	13f33ea82bc9e4e2aa380a044dcab53b.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rewkljlpw.dll	13f33ea82bc9e4e2aa380a044dcab53b.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\rewkljlpw.exe	13f33ea82bc9e4e2aa380a044dcab53b.exe
File opened for modification	C:\Windows\rewkljlpw.exe	13f33ea82bc9e4e2aa380a044dcab53b.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3964	13f33ea82bc9e4e2aa380a044dcab53b.exe
3964	13f33ea82bc9e4e2aa380a044dcab53b.exe
3964	13f33ea82bc9e4e2aa380a044dcab53b.exe
3964	13f33ea82bc9e4e2aa380a044dcab53b.exe
3964	13f33ea82bc9e4e2aa380a044dcab53b.exe
3964	13f33ea82bc9e4e2aa380a044dcab53b.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3964	13f33ea82bc9e4e2aa380a044dcab53b.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3964 wrote to memory of 3604	3964	13f33ea82bc9e4e2aa380a044dcab53b.exe	44
PID 3964 wrote to memory of 3604	3964	13f33ea82bc9e4e2aa380a044dcab53b.exe	44

C:\Users\Admin\AppData\Local\Temp\13f33ea82bc9e4e2aa380a044dcab53b.exe
"C:\Users\Admin\AppData\Local\Temp\13f33ea82bc9e4e2aa380a044dcab53b.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3964

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3604

Network

DNS

148.177.190.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

148.177.190.20.in-addr.arpa

IN PTR

Response
DNS

208.194.73.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

208.194.73.20.in-addr.arpa

IN PTR

Response
DNS

208.194.73.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

208.194.73.20.in-addr.arpa

IN PTR
DNS

95.221.229.192.in-addr.arpa

Remote address:

8.8.8.8:53

Request

95.221.229.192.in-addr.arpa

IN PTR

Response
DNS

9.228.82.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

9.228.82.20.in-addr.arpa

IN PTR

Response
DNS

26.35.223.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

26.35.223.20.in-addr.arpa

IN PTR

Response
DNS

41.110.16.96.in-addr.arpa

Remote address:

8.8.8.8:53

Request

41.110.16.96.in-addr.arpa

IN PTR

Response

41.110.16.96.in-addr.arpa

IN PTR

a96-16-110-41deploystaticakamaitechnologiescom
DNS

41.110.16.96.in-addr.arpa

Remote address:

8.8.8.8:53

Request

41.110.16.96.in-addr.arpa

IN PTR
DNS

41.110.16.96.in-addr.arpa

Remote address:

8.8.8.8:53

Request

41.110.16.96.in-addr.arpa

IN PTR
DNS

86.23.85.13.in-addr.arpa

Remote address:

8.8.8.8:53

Request

86.23.85.13.in-addr.arpa

IN PTR

Response
DNS

2.136.104.51.in-addr.arpa

Remote address:

8.8.8.8:53

Request

2.136.104.51.in-addr.arpa

IN PTR

Response
DNS

206.23.85.13.in-addr.arpa

Remote address:

8.8.8.8:53

Request

206.23.85.13.in-addr.arpa

IN PTR

Response
DNS

206.23.85.13.in-addr.arpa

Remote address:

8.8.8.8:53

Request

206.23.85.13.in-addr.arpa

IN PTR
DNS

240.221.184.93.in-addr.arpa

Remote address:

8.8.8.8:53

Request

240.221.184.93.in-addr.arpa

IN PTR

Response
DNS

81.171.91.138.in-addr.arpa

Remote address:

8.8.8.8:53

Request

81.171.91.138.in-addr.arpa

IN PTR

Response
DNS

tse1.mm.bing.net

Remote address:

8.8.8.8:53

Request

tse1.mm.bing.net

IN A

Response

tse1.mm.bing.net

IN CNAME

mm-mm.bing.net.trafficmanager.net

mm-mm.bing.net.trafficmanager.net

IN CNAME

dual-a-0001.a-msedge.net

dual-a-0001.a-msedge.net

IN A

204.79.197.200

dual-a-0001.a-msedge.net

IN A

13.107.21.200
DNS

tse1.mm.bing.net

Remote address:

8.8.8.8:53

Request

tse1.mm.bing.net

IN A
GET

https://tse1.mm.bing.net/th?id=OADD2.10239317301305_1RDDROWSHG0C525AI&pid=21.2&w=1920&h=1080&c=4

Remote address:

204.79.197.200:443

Request

GET /th?id=OADD2.10239317301305_1RDDROWSHG0C525AI&pid=21.2&w=1920&h=1080&c=4 HTTP/2.0
host: tse1.mm.bing.net
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041

Response

HTTP/2.0 200

cache-control: public, max-age=2592000
content-length: 428567
content-type: image/jpeg
x-cache: TCP_HIT
access-control-allow-origin: *
access-control-allow-headers: *
access-control-allow-methods: GET, POST, OPTIONS
timing-allow-origin: *
report-to: {"group":"network-errors","max_age":604800,"endpoints":[{"url":"https://aefd.nelreports.net/api/report?cat=bingth"}]}
nel: {"report_to":"network-errors","max_age":604800,"success_fraction":0.001,"failure_fraction":1.0}
accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
x-msedge-ref: Ref A: DD5126BD613646B98184B0FAA6B9AA42 Ref B: LON04EDGE1208 Ref C: 2023-12-31T09:24:59Z
date: Sun, 31 Dec 2023 09:24:58 GMT
GET

https://tse1.mm.bing.net/th?id=OADD2.10239317301714_1EPLZW0KO7U2RACHB&pid=21.2&w=1080&h=1920&c=4

Remote address:

204.79.197.200:443

Request

GET /th?id=OADD2.10239317301714_1EPLZW0KO7U2RACHB&pid=21.2&w=1080&h=1920&c=4 HTTP/2.0
host: tse1.mm.bing.net
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041

Response

HTTP/2.0 200

cache-control: public, max-age=2592000
content-length: 348769
content-type: image/jpeg
x-cache: TCP_HIT
access-control-allow-origin: *
access-control-allow-headers: *
access-control-allow-methods: GET, POST, OPTIONS
timing-allow-origin: *
report-to: {"group":"network-errors","max_age":604800,"endpoints":[{"url":"https://aefd.nelreports.net/api/report?cat=bingth"}]}
nel: {"report_to":"network-errors","max_age":604800,"success_fraction":0.001,"failure_fraction":1.0}
accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
x-msedge-ref: Ref A: F77795BFF241401B91303BFA257087CB Ref B: LON04EDGE1208 Ref C: 2023-12-31T09:24:59Z
date: Sun, 31 Dec 2023 09:24:58 GMT
GET

https://tse1.mm.bing.net/th?id=OADD2.10239317300955_19MQM2GNXTMKACNTR&pid=21.2&w=1920&h=1080&c=4

Remote address:

204.79.197.200:443

Request

GET /th?id=OADD2.10239317300955_19MQM2GNXTMKACNTR&pid=21.2&w=1920&h=1080&c=4 HTTP/2.0
host: tse1.mm.bing.net
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041
GET

https://tse1.mm.bing.net/th?id=OADD2.10239317301329_158N7EC87NQCHAYN7&pid=21.2&w=1920&h=1080&c=4

Remote address:

204.79.197.200:443

Request

GET /th?id=OADD2.10239317301329_158N7EC87NQCHAYN7&pid=21.2&w=1920&h=1080&c=4 HTTP/2.0
host: tse1.mm.bing.net
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041
GET

https://tse1.mm.bing.net/th?id=OADD2.10239317301388_1K3UDK899TDUR31OR&pid=21.2&w=1080&h=1920&c=4

Remote address:

204.79.197.200:443

Request

GET /th?id=OADD2.10239317301388_1K3UDK899TDUR31OR&pid=21.2&w=1080&h=1920&c=4 HTTP/2.0
host: tse1.mm.bing.net
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041
GET

https://tse1.mm.bing.net/th?id=OADD2.10239317301738_1X6L2VINPQJNWJA05&pid=21.2&w=1080&h=1920&c=4

Remote address:

204.79.197.200:443

Request

GET /th?id=OADD2.10239317301738_1X6L2VINPQJNWJA05&pid=21.2&w=1080&h=1920&c=4 HTTP/2.0
host: tse1.mm.bing.net
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041
DNS

104.241.123.92.in-addr.arpa

Remote address:

8.8.8.8:53

Request

104.241.123.92.in-addr.arpa

IN PTR

Response

104.241.123.92.in-addr.arpa

IN PTR

a92-123-241-104deploystaticakamaitechnologiescom

204.79.197.200:443

https://tse1.mm.bing.net/th?id=OADD2.10239317301738_1X6L2VINPQJNWJA05&pid=21.2&w=1080&h=1920&c=4

tls, http2

25.7kB
692.8kB
519
515

HTTP Request

GET https://tse1.mm.bing.net/th?id=OADD2.10239317301305_1RDDROWSHG0C525AI&pid=21.2&w=1920&h=1080&c=4

HTTP Request

GET https://tse1.mm.bing.net/th?id=OADD2.10239317301714_1EPLZW0KO7U2RACHB&pid=21.2&w=1080&h=1920&c=4

HTTP Request

GET https://tse1.mm.bing.net/th?id=OADD2.10239317300955_19MQM2GNXTMKACNTR&pid=21.2&w=1920&h=1080&c=4

HTTP Request

GET https://tse1.mm.bing.net/th?id=OADD2.10239317301329_158N7EC87NQCHAYN7&pid=21.2&w=1920&h=1080&c=4

HTTP Request

GET https://tse1.mm.bing.net/th?id=OADD2.10239317301388_1K3UDK899TDUR31OR&pid=21.2&w=1080&h=1920&c=4

HTTP Response

200

HTTP Response

200

HTTP Request

GET https://tse1.mm.bing.net/th?id=OADD2.10239317301738_1X6L2VINPQJNWJA05&pid=21.2&w=1080&h=1920&c=4
204.79.197.200:443

tse1.mm.bing.net

tls, http2

1.4kB
8.2kB
16
13
204.79.197.200:443

tse1.mm.bing.net

tls, http2

1.4kB
8.3kB
16
14
204.79.197.200:443

tse1.mm.bing.net

tls, http2

1.4kB
8.3kB
16
14
204.79.197.200:443

tse1.mm.bing.net

tls, http2

1.4kB
8.2kB
16
13
20.54.110.119:443

tls

7.4kB
6.2kB
14
11
52.111.236.22:443
93.184.221.240:80
96.17.178.176:80
96.17.178.176:80
93.184.221.240:80
93.184.221.240:80
96.17.178.176:80
96.17.178.176:80
96.17.178.176:80

104 B
2
96.17.178.176:80
96.17.178.176:80
96.17.178.176:80
96.17.178.176:80
96.17.178.176:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
93.184.221.240:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
93.184.221.240:80
88.221.134.32:80
88.221.134.32:80
96.17.178.176:80
96.17.178.176:80
88.221.134.32:80
88.221.134.32:80
20.189.173.18:443
192.229.221.95:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80
88.221.134.32:80

8.8.8.8:53

148.177.190.20.in-addr.arpa

dns

73 B
159 B
1
1

DNS Request

148.177.190.20.in-addr.arpa
8.8.8.8:53

208.194.73.20.in-addr.arpa

dns

144 B
158 B
2
1

DNS Request

208.194.73.20.in-addr.arpa

DNS Request

208.194.73.20.in-addr.arpa
8.8.8.8:53

95.221.229.192.in-addr.arpa

dns

73 B
144 B
1
1

DNS Request

95.221.229.192.in-addr.arpa
8.8.8.8:53

9.228.82.20.in-addr.arpa

dns

70 B
156 B
1
1

DNS Request

9.228.82.20.in-addr.arpa
8.8.8.8:53

26.35.223.20.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

26.35.223.20.in-addr.arpa
8.8.8.8:53

41.110.16.96.in-addr.arpa

dns

213 B
135 B
3
1

DNS Request

41.110.16.96.in-addr.arpa

DNS Request

41.110.16.96.in-addr.arpa

DNS Request

41.110.16.96.in-addr.arpa
8.8.8.8:53

86.23.85.13.in-addr.arpa

dns

70 B
144 B
1
1

DNS Request

86.23.85.13.in-addr.arpa
8.8.8.8:53

2.136.104.51.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

2.136.104.51.in-addr.arpa
8.8.8.8:53

206.23.85.13.in-addr.arpa

dns

142 B
145 B
2
1

DNS Request

206.23.85.13.in-addr.arpa

DNS Request

206.23.85.13.in-addr.arpa
8.8.8.8:53

240.221.184.93.in-addr.arpa

dns

73 B
144 B
1
1

DNS Request

240.221.184.93.in-addr.arpa
8.8.8.8:53

81.171.91.138.in-addr.arpa

dns

72 B
146 B
1
1

DNS Request

81.171.91.138.in-addr.arpa
8.8.8.8:53

tse1.mm.bing.net

dns

124 B
173 B
2
1

DNS Request

tse1.mm.bing.net

DNS Request

tse1.mm.bing.net

DNS Response

204.79.197.200

13.107.21.200
8.8.8.8:53

104.241.123.92.in-addr.arpa

dns

73 B
139 B
1
1

DNS Request

104.241.123.92.in-addr.arpa
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53
8.8.8.8:53

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3604-3-0x0000000002660000-0x0000000002661000-memory.dmp

Filesize
4KB

Download
memory/3964-0-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3964-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3964-8-0x0000000000690000-0x0000000000691000-memory.dmp

Filesize
4KB

Download
memory/3964-6-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

HTTP Request

HTTP Request

HTTP Request

HTTP Request

HTTP Request

HTTP Response

HTTP Response

HTTP Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Response

DNS Request

MITRE ATT&CK Enterprise v15

Replay Monitor

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