guloader | 2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344

General

Target

2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
Size

717KB
MD5

8d145a0a9e1675eacae38f75bd733a4d
SHA1

cb83fb1a99a5969f5d73f2f4fe7baa1552f5503b
SHA256

2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344
SHA512

39614bb76e55c3f0064de266cbfaa7232582ce078d3d06797839863ffb678b6dee438cf36a5f668b13cecc30ce096c36f623d302046e9c47b7b6e255f9785170
SSDEEP

12288:YTNq+SR77qKz7eAhtWQ+tqMSPIUpsgTylZV5kaurAKyOgRRxye:YTcdaieAhtWXqMNUpNSZV5kae6Oc

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 6 IoCs

pid	Process
3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Glassliberi130\Combustive.sel	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
File created	C:\Windows\SysWOW64\heterogynous\slvtjsskuffen.lnk	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
File opened for modification	C:\Windows\SysWOW64\avocadodressing\Kreditorsaldi.sto	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
4240	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3336 set thread context of 4240	3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe	94

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\skolebestyrerens.skj	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
File opened for modification	C:\Program Files (x86)\chang.Hek	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
File opened for modification	C:\Program Files (x86)\ligningsafdelings\aortas.adi	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Fremskaffet53.trs	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 4240	3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe	94
PID 3336 wrote to memory of 4240	3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe	94
PID 3336 wrote to memory of 4240	3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe	94
PID 3336 wrote to memory of 4240	3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe	94
PID 3336 wrote to memory of 4240	3336	2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe	94

C:\Users\Admin\AppData\Local\Temp\2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
"C:\Users\Admin\AppData\Local\Temp\2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Users\Admin\AppData\Local\Temp\2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe
  "C:\Users\Admin\AppData\Local\Temp\2e38ec7bb6b82799b0c016634cd39748b0ace2e889cf9fcdb5550f293a123344.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:4240

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nst834A.tmp\LangDLL.dll

Filesize
5KB

MD5
014a3be4a7c1ccb217916dbf4f222bd1

SHA1
9b4c41eb0e84886beb5591d8357155e27f9c68ed

SHA256
09acfc5ee34a1dfa1af3a9d34f00c3b1327b56641feebd536e13752349c08ac8

SHA512
0f3d1bf548e29a136150b699665a3f22c6ea2821701737363fa2920b51c391d735f1eae92dea8af655e7d07304bd3d06e4aff3f5a82fa22bcf5d1690013eb922

Download Submit
C:\Users\Admin\AppData\Local\Temp\nst834A.tmp\System.dll

Filesize
12KB

MD5
564bb0373067e1785cba7e4c24aab4bf

SHA1
7c9416a01d821b10b2eef97b80899d24014d6fc1

SHA256
7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5

SHA512
22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

Download Submit
memory/3336-26-0x0000000004230000-0x0000000006844000-memory.dmp

Filesize
38.1MB

Download
memory/3336-27-0x0000000004230000-0x0000000006844000-memory.dmp

Filesize
38.1MB

Download
memory/3336-28-0x00000000777A1000-0x00000000778C1000-memory.dmp

Filesize
1.1MB

Download
memory/3336-30-0x00000000743F5000-0x00000000743F6000-memory.dmp

Filesize
4KB

Download
memory/3336-29-0x00000000777A1000-0x00000000778C1000-memory.dmp

Filesize
1.1MB

Download
memory/3336-40-0x0000000004230000-0x0000000006844000-memory.dmp

Filesize
38.1MB

Download
memory/4240-31-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4240-32-0x0000000001660000-0x0000000003C74000-memory.dmp

Filesize
38.1MB

Download
memory/4240-33-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4240-34-0x0000000001660000-0x0000000003C74000-memory.dmp

Filesize
38.1MB

Download

Analysis

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