gurcu | a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647

General

Target

369204590CE91E77109E21A298753522.exe
Size

119KB
MD5

369204590ce91e77109e21a298753522
SHA1

e981f0c86c42e9e8fcbc7dcff0e05c35887a3869
SHA256

a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647
SHA512

bf4367a692eb1f4c31533ee1391cfc1708c75bf726dd5287ac0fa2e602664fa3a74458ded18c1831db16f0462b202f79b10d0f82f3bcb98423a460002e04cf32
SSDEEP

3072:P56Q4BB1q/hJcq4YZRKsySYSLLx9yLjj6TG6WVt9bm+EFyW43LORzMJS/3:Fha6BuQdwLKTGLt9bmhD4q1Mc

Score

10^/10

gurcu collection discovery spyware stealer

Malware Config

Signatures

Detect Gurcu Stealer V3 payload 3 IoCs

resource	yara_rule
behavioral2/memory/896-0-0x000002363AEC0000-0x000002363AEE4000-memory.dmp	family_gurcu_v3
behavioral2/files/0x0008000000023266-7.dat	family_gurcu_v3
behavioral2/files/0x0008000000023266-5.dat	family_gurcu_v3

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-1-5-21-1859779917-101786662-3680946609-1000\Control Panel\International\Geo\Nation	369204590CE91E77109E21A298753522.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Control Panel\International\Geo\Nation	369204590CE91E77109E21A298753522.exe

Executes dropped EXE 2 IoCs

pid	Process
2864	369204590CE91E77109E21A298753522.exe
1228	tor.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-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	369204590CE91E77109E21A298753522.exe
Key opened	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	369204590CE91E77109E21A298753522.exe
Key opened	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	369204590CE91E77109E21A298753522.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
38	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
748	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2912	PING.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2864	369204590CE91E77109E21A298753522.exe
2864	369204590CE91E77109E21A298753522.exe
2864	369204590CE91E77109E21A298753522.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	896	369204590CE91E77109E21A298753522.exe
Token: SeDebugPrivilege	2864	369204590CE91E77109E21A298753522.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2864	369204590CE91E77109E21A298753522.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 896 wrote to memory of 4712	896	369204590CE91E77109E21A298753522.exe	85
PID 896 wrote to memory of 4712	896	369204590CE91E77109E21A298753522.exe	85
PID 4712 wrote to memory of 2332	4712	cmd.exe	87
PID 4712 wrote to memory of 2332	4712	cmd.exe	87
PID 4712 wrote to memory of 2912	4712	cmd.exe	88
PID 4712 wrote to memory of 2912	4712	cmd.exe	88
PID 4712 wrote to memory of 748	4712	cmd.exe	91
PID 4712 wrote to memory of 748	4712	cmd.exe	91
PID 4712 wrote to memory of 2864	4712	cmd.exe	92
PID 4712 wrote to memory of 2864	4712	cmd.exe	92
PID 2864 wrote to memory of 4104	2864	369204590CE91E77109E21A298753522.exe	97
PID 2864 wrote to memory of 4104	2864	369204590CE91E77109E21A298753522.exe	97
PID 2864 wrote to memory of 1228	2864	369204590CE91E77109E21A298753522.exe	100
PID 2864 wrote to memory of 1228	2864	369204590CE91E77109E21A298753522.exe	100

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-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	369204590CE91E77109E21A298753522.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	369204590CE91E77109E21A298753522.exe

C:\Users\Admin\AppData\Local\Temp\369204590CE91E77109E21A298753522.exe
"C:\Users\Admin\AppData\Local\Temp\369204590CE91E77109E21A298753522.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:896
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "369204590CE91E77109E21A298753522" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\369204590CE91E77109E21A298753522.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\369204590CE91E77109E21A298753522.exe" &&START "" "C:\Users\Admin\AppData\Local\EsetSecurity\369204590CE91E77109E21A298753522.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4712
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2332
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2912
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "369204590CE91E77109E21A298753522" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\369204590CE91E77109E21A298753522.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:748
- - C:\Users\Admin\AppData\Local\EsetSecurity\369204590CE91E77109E21A298753522.exe
    "C:\Users\Admin\AppData\Local\EsetSecurity\369204590CE91E77109E21A298753522.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:2864
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp7DBB.tmp" -C "C:\Users\Admin\AppData\Local\84tnjh4449"
      4⤵
      PID:4104
  - - C:\Users\Admin\AppData\Local\84tnjh4449\tor\tor.exe
      "C:\Users\Admin\AppData\Local\84tnjh4449\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\84tnjh4449\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:1228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

3

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\84tnjh4449\host\hostname

Filesize
64B

MD5
381c6897bd6379528e8b5669c92f2dac

SHA1
9ad21365ba61bde0eba634616b5f0122c949fb18

SHA256
6e1397ecd92d5c99739e7317e55f2825537fe267333c48150ab041d5b217e290

SHA512
16ce8ee97726a5661ceff38c9cf275660e6b0678b02b84f161c001b27dcb18be5d666d1a280db4aa610e26bc32c4f133cb0f1c1df7be94f390816876882b8f19

Download Submit
C:\Users\Admin\AppData\Local\84tnjh4449\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\84tnjh4449\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\84tnjh4449\torrc.txt

Filesize
218B

MD5
d6a66200b5601d00eec6178552031d19

SHA1
3538d7d610299ba3b7730bc946d26e63195b3790

SHA256
7e508deb112f877c9ec23a6816bd3461b82537bf87ddf1bcd71ce5661b2869ce

SHA512
e70ffa19fc3e4061c21b2a3d82292598d87878092fb3d0f3362f5ecfeada169a585acdea00ab0ba0ccb3bb6314323040ddd515537b0a5f35e5570f1719eebc48

Download Submit
C:\Users\Admin\AppData\Local\EsetSecurity\369204590CE91E77109E21A298753522.exe

Filesize
119KB

MD5
369204590ce91e77109e21a298753522

SHA1
e981f0c86c42e9e8fcbc7dcff0e05c35887a3869

SHA256
a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647

SHA512
bf4367a692eb1f4c31533ee1391cfc1708c75bf726dd5287ac0fa2e602664fa3a74458ded18c1831db16f0462b202f79b10d0f82f3bcb98423a460002e04cf32

Download Submit
C:\Users\Admin\AppData\Local\EsetSecurity\369204590CE91E77109E21A298753522.exe

Filesize
119KB

MD5
369204590ce91e77109e21a298753522

SHA1
e981f0c86c42e9e8fcbc7dcff0e05c35887a3869

SHA256
a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647

SHA512
bf4367a692eb1f4c31533ee1391cfc1708c75bf726dd5287ac0fa2e602664fa3a74458ded18c1831db16f0462b202f79b10d0f82f3bcb98423a460002e04cf32

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\369204590CE91E77109E21A298753522.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7DBB.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
memory/896-0-0x000002363AEC0000-0x000002363AEE4000-memory.dmp

Filesize
144KB

Download
memory/896-37-0x00007FF920C60000-0x00007FF921721000-memory.dmp

Filesize
10.8MB

Download
memory/896-4-0x00007FF920C60000-0x00007FF921721000-memory.dmp

Filesize
10.8MB

Download
memory/2864-10-0x0000016029410000-0x0000016029420000-memory.dmp

Filesize
64KB

Download
memory/2864-9-0x00007FF91FB10000-0x00007FF9205D1000-memory.dmp

Filesize
10.8MB

Download
memory/2864-40-0x00007FF91FB10000-0x00007FF9205D1000-memory.dmp

Filesize
10.8MB

Download
memory/2864-41-0x0000016029410000-0x0000016029420000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads