latrodectus | e7fc51310e3318c7220b4373e81d42357e9e6c073bb87d1a18e88ac81a6b4587

Analysis

max time kernel
1137s
max time network
1199s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
13-09-2024 11:15

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General

Target

Document-07-01-55.js
Size

713KB
MD5

ffba898288ab821fc44a97804f437e27
SHA1

c66e224adcd5ab4766e6e26b3c6cd26b308cb17b
SHA256

e7fc51310e3318c7220b4373e81d42357e9e6c073bb87d1a18e88ac81a6b4587
SHA512

bed4f49b422c38a057df7c4bfd729560af442f02ccd9a99029d37fb7782ba3ffceead5057b121bb2b16c5f97dd30c670c8be8f12b9ec294ea25a7d10c188f546
SSDEEP

12288:PTm/2pe/TVLLgxVqnm25dtfcdbYzdGMQOOV0LoNB9D1zOw:PTM2pKT9LgxVy55dtfc+53QOOV0LMDND

Score

10^/10

latrodectus discovery execution loader

Malware Config

Signatures

Detects Latrodectus 4 IoCs

Detects Latrodectus v1.4.

resource	yara_rule
behavioral2/memory/2692-45-0x00000251995E0000-0x00000251995F6000-memory.dmp	family_latrodectus_1_4
behavioral2/memory/2692-47-0x00000251995E0000-0x00000251995F6000-memory.dmp	family_latrodectus_1_4
behavioral2/memory/1368-52-0x00000218EE570000-0x00000218EE586000-memory.dmp	family_latrodectus_1_4
behavioral2/memory/1368-51-0x00000218EE570000-0x00000218EE586000-memory.dmp	family_latrodectus_1_4

Latrodectus loader
Latrodectus is a loader written in C++.
loader latrodectus

Blocklisted process makes network request 7 IoCs

flow	pid	Process
1	4600	msiexec.exe
4	1368	rundll32.exe
5	1368	rundll32.exe
12	1368	rundll32.exe
13	1368	rundll32.exe
14	1368	rundll32.exe
15	1368	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
340	MSIB442.tmp

Loads dropped DLL 8 IoCs

pid	Process
5072	MsiExec.exe
5072	MsiExec.exe
5072	MsiExec.exe
5072	MsiExec.exe
2692	rundll32.exe
1368	rundll32.exe
3560	rundll32.exe
3004	rundll32.exe

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

Drops file in Windows directory 13 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.log	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIAAF5.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIB3A5.tmp	msiexec.exe
File created	C:\Windows\SystemTemp\~DFB03EE6F5DE6B788B.TMP	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIB20B.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIB375.tmp	msiexec.exe
File created	C:\Windows\SystemTemp\~DF4D675871824A7AA2.TMP	msiexec.exe
File created	C:\Windows\Installer\inprogressinstallinfo.ipi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIB442.tmp	msiexec.exe
File created	C:\Windows\SystemTemp\~DFDE9565998757617C.TMP	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIB306.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIB355.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\	msiexec.exe

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MsiExec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSIB442.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4600	msiexec.exe
4600	msiexec.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3832	wscript.exe
Token: SeIncreaseQuotaPrivilege	3832	wscript.exe
Token: SeSecurityPrivilege	4600	msiexec.exe
Token: SeCreateTokenPrivilege	3832	wscript.exe
Token: SeAssignPrimaryTokenPrivilege	3832	wscript.exe
Token: SeLockMemoryPrivilege	3832	wscript.exe
Token: SeIncreaseQuotaPrivilege	3832	wscript.exe
Token: SeMachineAccountPrivilege	3832	wscript.exe
Token: SeTcbPrivilege	3832	wscript.exe
Token: SeSecurityPrivilege	3832	wscript.exe
Token: SeTakeOwnershipPrivilege	3832	wscript.exe
Token: SeLoadDriverPrivilege	3832	wscript.exe
Token: SeSystemProfilePrivilege	3832	wscript.exe
Token: SeSystemtimePrivilege	3832	wscript.exe
Token: SeProfSingleProcessPrivilege	3832	wscript.exe
Token: SeIncBasePriorityPrivilege	3832	wscript.exe
Token: SeCreatePagefilePrivilege	3832	wscript.exe
Token: SeCreatePermanentPrivilege	3832	wscript.exe
Token: SeBackupPrivilege	3832	wscript.exe
Token: SeRestorePrivilege	3832	wscript.exe
Token: SeShutdownPrivilege	3832	wscript.exe
Token: SeDebugPrivilege	3832	wscript.exe
Token: SeAuditPrivilege	3832	wscript.exe
Token: SeSystemEnvironmentPrivilege	3832	wscript.exe
Token: SeChangeNotifyPrivilege	3832	wscript.exe
Token: SeRemoteShutdownPrivilege	3832	wscript.exe
Token: SeUndockPrivilege	3832	wscript.exe
Token: SeSyncAgentPrivilege	3832	wscript.exe
Token: SeEnableDelegationPrivilege	3832	wscript.exe
Token: SeManageVolumePrivilege	3832	wscript.exe
Token: SeImpersonatePrivilege	3832	wscript.exe
Token: SeCreateGlobalPrivilege	3832	wscript.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe
Token: SeRestorePrivilege	4600	msiexec.exe
Token: SeTakeOwnershipPrivilege	4600	msiexec.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4600 wrote to memory of 5072	4600	msiexec.exe	84
PID 4600 wrote to memory of 5072	4600	msiexec.exe	84
PID 4600 wrote to memory of 5072	4600	msiexec.exe	84
PID 4600 wrote to memory of 340	4600	msiexec.exe	86
PID 4600 wrote to memory of 340	4600	msiexec.exe	86
PID 4600 wrote to memory of 340	4600	msiexec.exe	86
PID 2692 wrote to memory of 1368	2692	rundll32.exe	88
PID 2692 wrote to memory of 1368	2692	rundll32.exe	88

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Document-07-01-55.js
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3832

C:\Windows\system32\msiexec.exe
C:\Windows\system32\msiexec.exe /V
1⤵
- Blocklisted process makes network request
- Enumerates connected drives
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4600
- C:\Windows\syswow64\MsiExec.exe
  C:\Windows\syswow64\MsiExec.exe -Embedding 68DBA8AE5CF0A5EC61564EA86BBD6FE4
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:5072
- C:\Windows\Installer\MSIB442.tmp
  "C:\Windows\Installer\MSIB442.tmp" /DontWait C:/Windows/System32/rundll32.exe C:\Users\Admin\AppData\Roaming\true.dll, NvPluginGetInfo
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:340

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Roaming\true.dll, NvPluginGetInfo
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Windows\System32\rundll32.exe
  rundll32.exe "C:\Users\Admin\AppData\Roaming\Custom_update\Update_3b3afc02.dll", NvPluginGetInfo
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  PID:1368

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Roaming\Custom_update\Update_3b3afc02.dll", NvPluginGetInfo
1⤵
- Loads dropped DLL
PID:3560

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Roaming\Custom_update\Update_3b3afc02.dll", NvPluginGetInfo
1⤵
- Loads dropped DLL
PID:3004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Config.Msi\e57b383.rbs

Filesize
1KB

MD5
d439ed4542a6c67a05e66f9508c5f80f

SHA1
0448ebd7d724af9be7a654d0a3b0353ec0aade7c

SHA256
bee63a83d4d4df1fc7021a3391a19141242391d466372d4d69fbef70b3d6d4f4

SHA512
f0841077d8bd8aad506f2663f9cfd616180f08d2b1afd99922a534465cf80c492ebea94045c770696aeaf27e8b63bcd659bea0d8c0a66f14e3be02e17e3f94e8

Download Submit
C:\Users\Admin\AppData\Roaming\true.dll

Filesize
1.8MB

MD5
6dc0d350d735fd1acc8219cfa5d02b9b

SHA1
7ba0708a4404715fb21a23acfbd88a25b7245ef1

SHA256
2333dd858fc40899a1bff3fb39fbc0b4e65a864bfd4eb73c26b48aaddcca7061

SHA512
99c9b6310363ce3a7d9ff680c4a0ae976553fc4789b12f9b60d9f629608d90cf4d64b4c8a037264f8aaa48fba69ae397236ef4c32c2eb6779fb5d9e0b3b0d52f

Download Submit
C:\Windows\Installer\MSIAAF5.tmp

Filesize
1.9MB

MD5
c017277279dada1b9653bc6838019952

SHA1
4d66580dade368ea823c2afc602ad3686c20d4d1

SHA256
f60c7e2cd7078584e1fb2eacd6270c314f1e23f76a4cd78c5d13eec215f0e41c

SHA512
cd9fea4bfa73987fb95e4e15ee6fa5c489842b79f8a497ea7dd65ec355db9df6d4af786612e6d9f43e7293723a91841465368728fb1b5361716a9297008adfa2

Download Submit
C:\Windows\Installer\MSIB20B.tmp

Filesize
436KB

MD5
475d20c0ea477a35660e3f67ecf0a1df

SHA1
67340739f51e1134ae8f0ffc5ae9dd710e8e3a08

SHA256
426e6cf199a8268e8a7763ec3a4dd7add982b28c51d89ebea90ca792cbae14dd

SHA512
99525aaab2ab608134b5d66b5313e7fc3c2e2877395c5c171897d7a6c66efb26b606de1a4cb01118c2738ea4b6542e4eb4983e631231b3f340bf85e509a9589e

Download Submit
C:\Windows\Installer\MSIB442.tmp

Filesize
389KB

MD5
b9545ed17695a32face8c3408a6a3553

SHA1
f6c31c9cd832ae2aebcd88e7b2fa6803ae93fc83

SHA256
1e0e63b446eecf6c9781c7d1cae1f46a3bb31654a70612f71f31538fb4f4729a

SHA512
f6d6dc40dcba5ff091452d7cc257427dcb7ce2a21816b4fec2ee249e63246b64667f5c4095220623533243103876433ef8c12c9b612c0e95fdfffe41d1504e04

Download Submit
memory/1368-52-0x00000218EE570000-0x00000218EE586000-memory.dmp

Filesize
88KB

Download
memory/1368-51-0x00000218EE570000-0x00000218EE586000-memory.dmp

Filesize
88KB

Download
memory/2692-45-0x00000251995E0000-0x00000251995F6000-memory.dmp

Filesize
88KB

Download
memory/2692-47-0x00000251995E0000-0x00000251995F6000-memory.dmp

Filesize
88KB

Download
memory/2692-48-0x0000000180000000-0x00000001801DC000-memory.dmp

Filesize
1.9MB

Download