Threat name:
LummaC Stealer, Mars Stealer, PureLog St
Alert
Classification:
troj.spyw.evad
.NET source code contains method to dynamically call methods (often used by packers)
Adds extensions / path to Windows Defender exclusion list (Registry)
AI detected suspicious sample
Allocates memory in foreign processes
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates HTML files with .exe extension (expired dropper behavior)
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Disable Windows Defender real time protection (registry)
Disables Windows Defender (deletes autostart)
Drops PE files to the document folder of the user
Drops PE files with a suspicious file extension
Exclude list of file types from scheduled, custom, and real-time scanning
Found direct / indirect Syscall (likely to bypass EDR)
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Hides threads from debuggers
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies Group Policy settings
Modifies power options to not sleep / hibernate
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Overwrites code with unconditional jumps - possibly settings hooks in foreign process
PE file contains section with special chars
PE file has nameless sections
Performs DNS queries to domains with low reputation
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Sigma detected: Disable power options
Sigma detected: Silenttrinity Stager Msbuild Activity
Sigma detected: Stop EventLog
Suspicious powershell command line found
Tries to harvest and steal Bitcoin Wallet information
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Crypto Currency Wallets
Tries to steal Mail credentials (via file / registry access)
Uses known network protocols on non-standard ports
Uses powercfg.exe to modify the power settings
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected Generic Downloader
Yara detected LummaC Stealer
Yara detected Mars stealer
Yara detected MSILDownloaderGeneric
Yara detected Powershell download and execute
Yara detected PureLog Stealer
Yara detected Socks5Systemz
Yara detected Vidar stealer
behaviorgraph
top1
dnsIp2
2
Behavior Graph
ID:
1470976
Sample:
1720605557.036432_setup.exe
Startdate:
10/07/2024
Architecture:
WINDOWS
Score:
100
118
service-domain.xyz
2->118
120
api2.check-data.xyz
2->120
122
28 other IPs or domains
2->122
150
Found malware configuration
2->150
152
Malicious sample detected
(through community Yara
rule)
2->152
154
Antivirus detection
for URL or domain
2->154
158
31 other signatures
2->158
10
1720605557.036432_setup.exe
11
45
2->10
started
15
svchost.exe
2->15
started
17
svchost.exe
2->17
started
19
2 other processes
2->19
signatures3
156
Performs DNS queries
to domains with low
reputation
120->156
process4
dnsIp5
138
WAIqpCKkHw.WAIqpCKkHw
10->138
140
vk.com
87.240.132.78, 49738, 49740, 49744
VKONTAKTE-SPB-AShttpvkcomRU
Russian Federation
10->140
144
14 other IPs or domains
10->144
110
C:\Users\...\qg_4OFUknYPdi8RiJYzi4jmn.exe, PE32
10->110
dropped
112
C:\Users\...\gR2Znn5gG0tYmT7xe9fdRUGb.exe, PE32
10->112
dropped
114
C:\Users\...\e2wVJGpUnc9KuogLxSSy5jb9.exe, PE32+
10->114
dropped
116
17 other malicious files
10->116
dropped
196
Overwrites code with
unconditional jumps
- possibly settings
hooks in foreign process
10->196
198
Drops PE files to the
document folder of the
user
10->198
200
Creates HTML files with
.exe extension (expired
dropper behavior)
10->200
202
7 other signatures
10->202
21
MUCquQIJ6ozsArbXZaG5zlii.exe
2
10->21
started
24
c2725vnic2fyyMQwIsgwSDgn.exe
35
10->24
started
28
Dfi0y0L_UOFgd7kYAWZN2G19.exe
10->28
started
34
8 other processes
10->34
30
cmd.exe
15->30
started
32
conhost.exe
15->32
started
142
127.0.0.1
unknown
unknown
17->142
file6
signatures7
process8
dnsIp9
92
C:\Users\...\MUCquQIJ6ozsArbXZaG5zlii.tmp, PE32
21->92
dropped
36
MUCquQIJ6ozsArbXZaG5zlii.tmp
21->36
started
132
85.28.47.30
GES-ASRU
Russian Federation
24->132
134
77.91.77.81
FOTONTELECOM-TRANSIT-ASFOTONTELECOMISPRU
Russian Federation
24->134
94
C:\Users\user\AppData\...\softokn3[1].dll, PE32
24->94
dropped
96
C:\Users\user\AppData\Local\...\nss3[1].dll, PE32
24->96
dropped
98
C:\Users\user\AppData\...\mozglue[1].dll, PE32
24->98
dropped
106
9 other files (5 malicious)
24->106
dropped
172
Detected unpacking (changes
PE section rights)
24->172
174
Creates HTML files with
.exe extension (expired
dropper behavior)
24->174
176
Tries to steal Mail
credentials (via file
/ registry access)
24->176
192
5 other signatures
24->192
178
Writes to foreign memory
regions
28->178
180
Allocates memory in
foreign processes
28->180
182
Injects a PE file into
a foreign processes
28->182
39
MSBuild.exe
28->39
started
184
Suspicious powershell
command line found
30->184
43
powershell.exe
30->43
started
45
Conhost.exe
30->45
started
136
discord.com
162.159.136.232
CLOUDFLARENETUS
United States
34->136
100
C:\Users\user\AppData\Local\...\Install.exe, PE32
34->100
dropped
102
C:\Users\user\AppData\Local\...\Install.exe, PE32
34->102
dropped
104
C:\ProgramData\...\eqtpkqwqodik.exe, PE32+
34->104
dropped
186
Overwrites code with
unconditional jumps
- possibly settings
hooks in foreign process
34->186
188
Queries sensitive video
device information (via
WMI, Win32_VideoController,
often done to detect
virtual machines)
34->188
190
Found evasive API chain
(may stop execution
after reading information
in the PEB, e.g. number
of processors)
34->190
194
3 other signatures
34->194
47
cmd.exe
34->47
started
49
Install.exe
34->49
started
51
MSBuild.exe
34->51
started
53
13 other processes
34->53
file10
signatures11
process12
dnsIp13
78
C:\Users\user\AppData\Local\...\_setup64.tmp, PE32+
36->78
dropped
80
C:\Users\user\AppData\Local\...\_iscrypt.dll, PE32
36->80
dropped
82
C:\Users\user\AppData\Local\...\_RegDLL.tmp, PE32
36->82
dropped
90
34 other files (23 malicious)
36->90
dropped
55
audioshell32_64.exe
36->55
started
58
audioshell32_64.exe
36->58
started
124
tea.arpdabl.org
172.93.194.59
NEXEONUS
United States
39->124
126
survey-smiles.com
199.59.243.226
BODIS-NJUS
United States
39->126
160
Tries to harvest and
steal Putty / WinSCP
information (sessions,
passwords, etc)
39->160
162
Tries to harvest and
steal ftp login credentials
39->162
164
Tries to harvest and
steal browser information
(history, passwords,
etc)
39->164
170
2 other signatures
39->170
84
C:\Users\user\AppData\Local\...\Valve.pif, PE32
47->84
dropped
166
Suspicious powershell
command line found
47->166
168
Drops PE files with
a suspicious file extension
47->168
61
conhost.exe
47->61
started
86
C:\Users\user\AppData\Local\...\Install.exe, PE32
49->86
dropped
63
Install.exe
49->63
started
128
steamcommunity.com
104.102.42.29
AKAMAI-ASUS
United States
51->128
130
65.109.241.221
ALABANZA-BALTUS
United States
51->130
88
C:\Users\user\AppData\Local\...\Install.exe, PE32
53->88
dropped
66
conhost.exe
53->66
started
68
Install.exe
53->68
started
70
conhost.exe
53->70
started
72
8 other processes
53->72
file14
signatures15
process16
dnsIp17
108
C:\ProgramData\...\ARM Core Mode 7.10.66.exe, PE32
55->108
dropped
146
89.105.201.183
NOVOSERVE-ASNL
Netherlands
58->146
148
aquaswi.ru
94.156.8.80
NET1-ASBG
Bulgaria
58->148
74
Conhost.exe
61->74
started
204
Multi AV Scanner detection
for dropped file
63->204
76
forfiles.exe
63->76
started
file18
signatures19
process20
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