guloader | 8ef00db9712f487dc2bd4329378cb38ba2d1706284658e5e77602cb180ca82d7

Analysis

max time kernel
150s
max time network
152s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
09/06/2023, 08:26

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General

Target
5acd030fa8d6773c21b19a4468727d05.exe
Size 770KB
Sample230609-kbvbysbf43
SHA256 8ef00db9712f487dc2bd4329378cb38ba2d1706284658e5e77602cb180ca82d7
MD5 5acd030fa8d6773c21b19a4468727d05
SHA1 7d4e4f8e2145d381cf96c291782152737a976f29
SHA512 e13c6885c22c1e9e717f4bfc776ada825ea3c7ac5361a884b4f737de72f4781f09d200c84ce7afa29e348dbf3f3be4bf2bec889af8dd39dbaec35ff628eda01d
SSDEEP 12288:dgQ44tKnoQYrBCa/00lz/GVQ5pYkEwe+58Ym503sHr:d0CKoQUMa/rl7DVms8YmuM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	5acd030fa8d6773c21b19a4468727d05.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	5acd030fa8d6773c21b19a4468727d05.exe

Loads dropped DLL 2 IoCs

pid	Process
1088	5acd030fa8d6773c21b19a4468727d05.exe
1088	5acd030fa8d6773c21b19a4468727d05.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1088	5acd030fa8d6773c21b19a4468727d05.exe
588	5acd030fa8d6773c21b19a4468727d05.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1088 set thread context of 588	1088	5acd030fa8d6773c21b19a4468727d05.exe	27

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1088	5acd030fa8d6773c21b19a4468727d05.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 588	1088	5acd030fa8d6773c21b19a4468727d05.exe	27
PID 1088 wrote to memory of 588	1088	5acd030fa8d6773c21b19a4468727d05.exe	27
PID 1088 wrote to memory of 588	1088	5acd030fa8d6773c21b19a4468727d05.exe	27
PID 1088 wrote to memory of 588	1088	5acd030fa8d6773c21b19a4468727d05.exe	27
PID 1088 wrote to memory of 588	1088	5acd030fa8d6773c21b19a4468727d05.exe	27

C:\Users\Admin\AppData\Local\Temp\5acd030fa8d6773c21b19a4468727d05.exe
"C:\Users\Admin\AppData\Local\Temp\5acd030fa8d6773c21b19a4468727d05.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Users\Admin\AppData\Local\Temp\5acd030fa8d6773c21b19a4468727d05.exe
  "C:\Users\Admin\AppData\Local\Temp\5acd030fa8d6773c21b19a4468727d05.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:588

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Size 62KB
SHA256 d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904
MD5 3ac860860707baaf32469fa7cc7c0192
SHA1 c33c2acdaba0e6fa41fd2f00f186804722477639
SHA512 d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c
SSDEEP 1536:MRxM2u+06GOIVUvVmMKAfUfsrPa1jfCu18ZNMe3v:KMH+F3IacMZ2CPACu1GN7v
MD5 SHA1 SHA512 SSDEEP

Submit Download

TarE152.tmp

Path C:\Users\Admin\AppData\Local\Temp\TarE152.tmp
Size 164KB
SHA256 c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6
MD5 4ff65ad929cd9a367680e0e5b1c08166
SHA1 c0af0d4396bd1f15c45f39d3b849ba444233b3a2
SHA512 f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27
SSDEEP 1536:FUdJXlCUs0Rv0/29TFrJW5ibN/5YJkKCdru2hRIwjYvjCQ9vbmt6t0:FIJXq0Rn5JaJkHru2h2jCEvt2
MD5 SHA1 SHA512 SSDEEP

Submit Download

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsy30B4.tmp\System.dll
Size 11KB
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03
SSDEEP 192:ex24sihno00Wfl97nH6BenXwWobpWBTtvShJ5omi7dJWjOlESlS:h8QIl972eXqlWBFSt273YOlEz
MD5 SHA1 SHA512 SSDEEP

Submit Download

Vintertid.lnk

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Vintertid.lnk
Size 936B
SHA256 32015429a859ff797424edbbaca7b41d345f89546623fbaa9b8b0175275e46e1
MD5 d6dd8412520980549b2a69422f32ac9d
SHA1 d3a23a9f9663a083b3d2f5d212dd1efc9e0fd281
SHA512 3799f76bd2453d945e37e45500c625264789a66075c36518eb91e93eeaab9bbf2bcf770917a96e95fd862eafead3353a595804eee314136e0b4da45f1e36344f
MD5 SHA1 SHA512

Submit Download

System.dll

Path \Users\Admin\AppData\Local\Temp\nsy30B4.tmp\System.dll
Size 11KB
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03
SSDEEP 192:ex24sihno00Wfl97nH6BenXwWobpWBTtvShJ5omi7dJWjOlESlS:h8QIl972eXqlWBFSt273YOlEz
MD5 SHA1 SHA512 SSDEEP

Submit Download

System.dll

Path \Users\Admin\AppData\Local\Temp\nsy30B4.tmp\System.dll
Size 11KB
SHA256 f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
MD5 8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 223bef1f19e644a610a0877d01eadc9e28299509
SHA512 d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03
SSDEEP 192:ex24sihno00Wfl97nH6BenXwWobpWBTtvShJ5omi7dJWjOlESlS:h8QIl972eXqlWBFSt273YOlEz
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/588-80-0x0000000000400000-0x0000000001462000-memory.dmp

Download

memory/588-81-0x0000000001470000-0x0000000002744000-memory.dmp

Download

memory/588-82-0x0000000000400000-0x0000000001462000-memory.dmp

Download

memory/588-83-0x0000000001470000-0x0000000002744000-memory.dmp

Download

memory/588-84-0x0000000000400000-0x0000000001462000-memory.dmp

Download

memory/1088-79-0x0000000003710000-0x00000000049E4000-memory.dmp

Download

memory/1088-78-0x0000000003710000-0x00000000049E4000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads