guloader | d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400

General

Target

d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
Size

539KB
MD5

4183d5786fe2a0e4563c5a0cf57d92f6
SHA1

2fc414de34b92a56712c6684c84af970037b81f5
SHA256

d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400
SHA512

8d86235c4d4060d656a1a2349a43e7ddfc9d036d476dbf8b9d404af060b754eb33bdc74ee03881f769fd19a60b87daefc696e48ee33f40b1e24f358dfe9a87fc
SSDEEP

12288:DMq47lWuTq/3dOxotjTps+ZHmkHN3HiPCpfBVxe:I/WuTsoWt1HnHpHiwVI

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	drive.google.com
5	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
2296	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2172 set thread context of 2296	2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	31

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Trnregimenternes\totalsanerende.Obs202	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.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	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2296	2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	31
PID 2172 wrote to memory of 2296	2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	31
PID 2172 wrote to memory of 2296	2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	31
PID 2172 wrote to memory of 2296	2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	31
PID 2172 wrote to memory of 2296	2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	31
PID 2172 wrote to memory of 2296	2172	d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe	31

C:\Users\Admin\AppData\Local\Temp\d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
"C:\Users\Admin\AppData\Local\Temp\d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Users\Admin\AppData\Local\Temp\d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe
  "C:\Users\Admin\AppData\Local\Temp\d7439af0827a632fe9730a7dd2585a2fb5b0af71c312cdeb49e6a738a9133400.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2296

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\Music\incinerations.lnk

Filesize
738B

MD5
441dbeab422aeb0d1f6b825b6fecaa06

SHA1
574643edee9239b4309c56bf0aa6644b63b7dc8b

SHA256
e8dc6507f15a63c985d6bcd79f7a9d84f604357e2a92c8427e89c9b02820ec3c

SHA512
d9b56cdb9ed23976a80f71887dd23d3622e12004122b48b4009dd1b2cb594ad42b3075bac4da9831fdfeeeefb5ff0d48a590e538eea1b5d5a3200d50628154c4

Download Submit
\Users\Admin\AppData\Local\Temp\nsoBEED.tmp\System.dll

Filesize
11KB

MD5
cf85183b87314359488b850f9e97a698

SHA1
6b6c790037eec7ebea4d05590359cb4473f19aea

SHA256
3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac

SHA512
fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

Download Submit
memory/2172-429-0x0000000003730000-0x0000000005C81000-memory.dmp

Filesize
37.3MB

Download
memory/2172-431-0x0000000077B51000-0x0000000077C52000-memory.dmp

Filesize
1.0MB

Download
memory/2172-430-0x0000000003730000-0x0000000005C81000-memory.dmp

Filesize
37.3MB

Download
memory/2172-432-0x0000000077B50000-0x0000000077CF9000-memory.dmp

Filesize
1.7MB

Download
memory/2172-434-0x0000000003730000-0x0000000005C81000-memory.dmp

Filesize
37.3MB

Download
memory/2296-433-0x0000000077B50000-0x0000000077CF9000-memory.dmp

Filesize
1.7MB

Download
memory/2296-454-0x0000000000450000-0x00000000014B2000-memory.dmp

Filesize
16.4MB

Download

Analysis

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