gurcu | 44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

Resubmissions

10-04-2024 02:49

240410-da1n1sfe7v 10

10-04-2024 02:49

10-04-2024 02:48

10-04-2024 02:48

14-10-2023 03:45

Analysis

max time kernel
73s
max time network
119s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
14-10-2023 03:45

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General

Target

B9a5797cb584014f3fede.exe
Size

530KB
MD5

862e7aeb18ba5892f51b5712a213a614
SHA1

99d86e4247f52c3ea9b2bb476af66dfc7707fa8d
SHA256

44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31
SHA512

678fc8fb5dc887f41db90e6341229ce35c830ffac4cbb91ea669ab5e8bc849bae05c15909ae62e4dfd3a249bb2ff062eaa0e256989fe203863db0396c60ec713
SSDEEP

6144:XHClm6SWPoK5Z0EwVSmRPQd/t/a2zDGVPJXvnzZjDJHb571Kjn1929XDccHd8JyO:XHCnZxb88RatpvnzZjDv7oj19yTNTY

Score

10^/10

gurcu collection discovery spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6176004110:AAFKA5be4dMwA848HWxzYIzrzzOGIHMOJGc/sendMessage?chat_id=615133582

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\Control Panel\International\Geo\Nation	B9a5797cb584014f3fede.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\Control Panel\International\Geo\Nation	B9a5797cb584014f3fede.exe

Executes dropped EXE 3 IoCs

pid	Process
1600	B9a5797cb584014f3fede.exe
2616	tor.exe
980	B9a5797cb584014f3fede.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.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

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
98	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1408	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3968	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1600	B9a5797cb584014f3fede.exe
1600	B9a5797cb584014f3fede.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4548	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	1600	B9a5797cb584014f3fede.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4548 wrote to memory of 4840	4548	B9a5797cb584014f3fede.exe	85
PID 4548 wrote to memory of 4840	4548	B9a5797cb584014f3fede.exe	85
PID 4840 wrote to memory of 4236	4840	cmd.exe	87
PID 4840 wrote to memory of 4236	4840	cmd.exe	87
PID 4840 wrote to memory of 3968	4840	cmd.exe	89
PID 4840 wrote to memory of 3968	4840	cmd.exe	89
PID 4840 wrote to memory of 1408	4840	cmd.exe	94
PID 4840 wrote to memory of 1408	4840	cmd.exe	94
PID 4840 wrote to memory of 1600	4840	cmd.exe	96
PID 4840 wrote to memory of 1600	4840	cmd.exe	96
PID 1600 wrote to memory of 2256	1600	B9a5797cb584014f3fede.exe	102
PID 1600 wrote to memory of 2256	1600	B9a5797cb584014f3fede.exe	102
PID 1600 wrote to memory of 2616	1600	B9a5797cb584014f3fede.exe	104
PID 1600 wrote to memory of 2616	1600	B9a5797cb584014f3fede.exe	104

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

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe

C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe
"C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4548
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "B9a5797cb584014f3fede" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4840
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4236
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:3968
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "B9a5797cb584014f3fede" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1408
- - C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
    "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:1600
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmpF1F1.tmp" -C "C:\Users\Admin\AppData\Local\gzrj1xdnai"
      4⤵
      PID:2256
  - - C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe
      "C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:2616

C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
1⤵
- Executes dropped EXE
PID:980

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\B9a5797cb584014f3fede.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe

Filesize
530KB

MD5
862e7aeb18ba5892f51b5712a213a614

SHA1
99d86e4247f52c3ea9b2bb476af66dfc7707fa8d

SHA256
44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

SHA512
678fc8fb5dc887f41db90e6341229ce35c830ffac4cbb91ea669ab5e8bc849bae05c15909ae62e4dfd3a249bb2ff062eaa0e256989fe203863db0396c60ec713

Download Submit
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe

Filesize
530KB

MD5
862e7aeb18ba5892f51b5712a213a614

SHA1
99d86e4247f52c3ea9b2bb476af66dfc7707fa8d

SHA256
44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

SHA512
678fc8fb5dc887f41db90e6341229ce35c830ffac4cbb91ea669ab5e8bc849bae05c15909ae62e4dfd3a249bb2ff062eaa0e256989fe203863db0396c60ec713

Download Submit
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe

Filesize
530KB

MD5
862e7aeb18ba5892f51b5712a213a614

SHA1
99d86e4247f52c3ea9b2bb476af66dfc7707fa8d

SHA256
44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

SHA512
678fc8fb5dc887f41db90e6341229ce35c830ffac4cbb91ea669ab5e8bc849bae05c15909ae62e4dfd3a249bb2ff062eaa0e256989fe203863db0396c60ec713

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF1F1.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\data\cached-microdesc-consensus.tmp

Filesize
2.7MB

MD5
1f28672a252d8b5a15c8d492d08649c9

SHA1
1be35413afc11f275f06d501881d2249a693769b

SHA256
455665425498e13f9213bc20b32b6138efbaf74c1243266daed2003161f126bd

SHA512
82f3315072a99facf6501c3bf0e07edd5f8508520ee69885f8e8602afcb551c48cdea773f3ace5b095ade020d4a599d15d47077e80f6aa16d4f4b3225fd95282

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\data\cached-microdescs.new

Filesize
7.6MB

MD5
5de34ed6deeec16be18c4f841bd489d4

SHA1
9b40e7b666bc2403e2b9b27d08c35c4648665340

SHA256
734199e17465328fedc7a7436ddb15ef1d11feb857640433a1fafc39ae1b965e

SHA512
33c955cc6097e2b6e4434816dcd9a87cf457f28d241732474cced9cf042837d5475ce7021e616c9d7c7e78ad724ed12a191fdf70760d5f25fa67098b99892373

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\host\hostname

Filesize
64B

MD5
b7af5a448ac43526912735742d35e879

SHA1
5866a777e38bb3d44a508d50be4948feecd6862e

SHA256
d9a9dd541c53fcd25744e8260a8dc424d4319ed769d6e8dd57936b5182a3689a

SHA512
b62d2abd8f4979322b0f038901b50d93d6c52be235df51fcfe4747175afaf55e32b25e03d3ee98626ded1bf29a033e05ea14f394f2bfb9d33b55b3d6cfd126e7

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt

Filesize
218B

MD5
110cfc0f2ed003eb58d3423047c4dd4f

SHA1
497285f1b71ed0cc3cbede88ed8c83becd1f6c0d

SHA256
464cea761e41940b6a1330454b9f936cd56bebb78f5d05965cc181b95b265f43

SHA512
836f3d93e4ad4b12612fa901b2969a3acb5ada0bfab2efc15a96b0b7c48cd9036910ef6bf7f02c6273960780d641c79fc7f24a82da158dc2e65c7c06bf2b90b7

Download Submit
memory/980-76-0x00007FFA17720000-0x00007FFA181E1000-memory.dmp

Filesize
10.8MB

Download
memory/1600-14-0x00007FFA17720000-0x00007FFA181E1000-memory.dmp

Filesize
10.8MB

Download
memory/1600-12-0x000001E5F8000000-0x000001E5F8010000-memory.dmp

Filesize
64KB

Download
memory/1600-11-0x00007FFA17720000-0x00007FFA181E1000-memory.dmp

Filesize
10.8MB

Download
memory/4548-0-0x0000025D1F870000-0x0000025D1F8FA000-memory.dmp

Filesize
552KB

Download
memory/4548-6-0x00007FFA18BC0000-0x00007FFA19681000-memory.dmp

Filesize
10.8MB

Download
memory/4548-2-0x0000025D39EF0000-0x0000025D39F00000-memory.dmp

Filesize
64KB

Download
memory/4548-1-0x00007FFA18BC0000-0x00007FFA19681000-memory.dmp

Filesize
10.8MB

Download