f0031f9d7f25d4d29581879f62565a5a565995899adc60213f9e218147c78593

General

Target

MuMuInstaller_3.1.7.0_gw-overseas12_all_1712735105.exe
Size

5.3MB
MD5

fbd9ad001bb2719f574c0705c5de05fb
SHA1

d07e77a490ad677935ac8213b88237e94440e791
SHA256

f0031f9d7f25d4d29581879f62565a5a565995899adc60213f9e218147c78593
SHA512

5724e3f858ae7ea92ba4ce325f3f8f4b90ecc6d7c19476e2888c4b09f0913463191b977f71314300918cceb0a6ae0b80e29d3c70891e8aeb9314da233a929e96
SSDEEP

98304:oeZOuRuvqAgef1ndGaX6tJJQv2FKA75OpVclc02vDRZTEB:1ZOPNdo3u0jc02vVZoB

Score

6^/10

Malware Config

Signatures

Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.

Query Registry
T1012

Peripheral Device Discovery
T1120

System Information Discovery
T1082

Processes:

nemu-downloader.exe

description ioc process

File opened (read-only) \??\F: nemu-downloader.exe

description	ioc	process
File opened (read-only)	\??\F:	nemu-downloader.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

nemu-downloader.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Control Panel\International\Geo\Nation	nemu-downloader.exe

Executes dropped EXE 5 IoCs

Processes:

nemu-downloader.exeColaBoxChecker.exeHyperVChecker.exeHyperVChecker.exeHyperVChecker.exe

pid process

1720 nemu-downloader.exe
4940 ColaBoxChecker.exe
4268 HyperVChecker.exe
3548 HyperVChecker.exe
3632 HyperVChecker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

nemu-downloader.exe

pid process

1720 nemu-downloader.exe
1720 nemu-downloader.exe
1720 nemu-downloader.exe
1720 nemu-downloader.exe
Suspicious behavior: LoadsDriver 4 IoCs

Processes:

pid process

668
668
668
668

pid	process
1720	nemu-downloader.exe
4940	ColaBoxChecker.exe
4268	HyperVChecker.exe
3548	HyperVChecker.exe
3632	HyperVChecker.exe

pid	process
1720	nemu-downloader.exe
1720	nemu-downloader.exe
1720	nemu-downloader.exe
1720	nemu-downloader.exe

pid	process
668
668
668
668

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

MuMuInstaller_3.1.7.0_gw-overseas12_all_1712735105.exenemu-downloader.exe

description	pid	process	target process
PID 1964 wrote to memory of 1720	1964	MuMuInstaller_3.1.7.0_gw-overseas12_all_1712735105.exe	nemu-downloader.exe
PID 1964 wrote to memory of 1720	1964	MuMuInstaller_3.1.7.0_gw-overseas12_all_1712735105.exe	nemu-downloader.exe
PID 1964 wrote to memory of 1720	1964	MuMuInstaller_3.1.7.0_gw-overseas12_all_1712735105.exe	nemu-downloader.exe
PID 1720 wrote to memory of 4940	1720	nemu-downloader.exe	ColaBoxChecker.exe
PID 1720 wrote to memory of 4940	1720	nemu-downloader.exe	ColaBoxChecker.exe
PID 1720 wrote to memory of 4940	1720	nemu-downloader.exe	ColaBoxChecker.exe
PID 1720 wrote to memory of 4268	1720	nemu-downloader.exe	HyperVChecker.exe
PID 1720 wrote to memory of 4268	1720	nemu-downloader.exe	HyperVChecker.exe
PID 1720 wrote to memory of 3548	1720	nemu-downloader.exe	HyperVChecker.exe
PID 1720 wrote to memory of 3548	1720	nemu-downloader.exe	HyperVChecker.exe
PID 1720 wrote to memory of 3632	1720	nemu-downloader.exe	HyperVChecker.exe
PID 1720 wrote to memory of 3632	1720	nemu-downloader.exe	HyperVChecker.exe

C:\Users\Admin\AppData\Local\Temp\MuMuInstaller_3.1.7.0_gw-overseas12_all_1712735105.exe
"C:\Users\Admin\AppData\Local\Temp\MuMuInstaller_3.1.7.0_gw-overseas12_all_1712735105.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1964

C:\Users\Admin\AppData\Local\Temp\7z706D37AC\nemu-downloader.exe
C:\Users\Admin\AppData\Local\Temp\7z706D37AC\nemu-downloader.exe
2⤵
- Enumerates connected drives
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1720

C:\Users\Admin\AppData\Local\Temp\7z706D37AC\ColaBoxChecker.exe
"C:\Users\Admin\AppData\Local\Temp\7z706D37AC\ColaBoxChecker.exe" checker /baseboard
3⤵
- Executes dropped EXE
PID:4940

C:\Users\Admin\AppData\Local\Temp\7z706D37AC\HyperVChecker.exe
"C:\Users\Admin\AppData\Local\Temp\7z706D37AC\HyperVChecker.exe"
3⤵
- Executes dropped EXE
PID:4268

C:\Users\Admin\AppData\Local\Temp\7z706D37AC\HyperVChecker.exe
"C:\Users\Admin\AppData\Local\Temp\7z706D37AC\HyperVChecker.exe"
3⤵
- Executes dropped EXE
PID:3548

C:\Users\Admin\AppData\Local\Temp\7z706D37AC\HyperVChecker.exe
"C:\Users\Admin\AppData\Local\Temp\7z706D37AC\HyperVChecker.exe"
3⤵
- Executes dropped EXE
PID:3632

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\7z706D37AC\ColaBoxChecker.exe
Filesize
4.0MB

MD5
839708e3f96cf055436fa08d6205263c

SHA1
a4579f8cb6b80fe3fd50099794f63eb51be3292f

SHA256
1373c5d006a5dbcd9b86cfff9a37616f1245d1333c4adcefc7cd18926b98d752

SHA512
ece67e031e06a0442d935e7d81d0eed57ae92b348b5d104423577478ce226e4a4bde834c54e31d33bfe6f574fb7798ba96886d9e8edb738edee6e7c9c43054cd

Download Submit
C:\Users\Admin\AppData\Local\Temp\7z706D37AC\HyperVChecker.exe
Filesize
117KB

MD5
dbd84c6083e4badf4741d95ba3c9b5f8

SHA1
4a555adf8e0459bfd1145d9bd8d91b3fff94aad0

SHA256
9ff467bc5a1c377102d25da9fa9c24dcc4375f456510f71584f0714fdfb2af39

SHA512
fb5fe74f64254609e07d6642acf904562bb905cd7c14c6f85ba31bcdbaf06686c0586609ec4f5d2f8f55ff90334dcbb774a3a6e78df74bf1b1d0cd03dec21870

Download Submit
C:\Users\Admin\AppData\Local\Temp\7z706D37AC\baseboard
MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
C:\Users\Admin\AppData\Local\Temp\7z706D37AC\baseboard
Filesize
115B

MD5
349f72361a40e15333bac49aa08cba58

SHA1
ffe6f33be18a80ea66c9107d0da56c5351b8fc41

SHA256
d26561d3a59d3d0a5a0c3c536892a2d1efc52c93a87d90393797ed87e25c5bac

SHA512
4ecc04da8b54c856d4cac67915d26e78806bf648c43ab9214b043729984f6412959d7903ca34a43dd461635c9884922dfa87d26022f1df4b408b5a13a138c939

Download Submit
C:\Users\Admin\AppData\Local\Temp\7z706D37AC\config.ini
Filesize
346B

MD5
d00fb4c61a255b58ff09886c6c72461b

SHA1
4e4f7d7ae36f67a4d6fc8479f8400b3eb769e978

SHA256
77dec4d79e1e844a2156f101defc0fc81c138a989e8ba1c722c58feb91b3cd4a

SHA512
8494ab9fe0594f3ff7b0893ca3e25d6d0a706e546e92c5b662aa864affcefe5f9721a6a95f37f40cdacf39d27a23e2b3cd5dbca4d7b8909cd7c186209d4b46db

Download Submit
C:\Users\Admin\AppData\Local\Temp\7z706D37AC\nemu-downloader.exe
Filesize
3.2MB

MD5
cdf8047ceae80d9cd9eb798a57bf6084

SHA1
8e7971401fada3099aed61849745fda37e1c0d32

SHA256
1f01a9abac64fae72e0a253ad9ffe2d62cd2967c1c2bc90fb956ac446fe2b11e

SHA512
ac366f38f39b935110192d1355147392ced5a21966cc22386804356dce24b2da7971a6a60d675689f93d74014d961bfb3b0c13cf06809b9f9feef580045e20dc

Download Submit
C:\Users\Admin\AppData\Local\Temp\7z706D37AC\skin.zip
Filesize
509KB

MD5
ecb43530caf9566c1b76d5af8d2097f1

SHA1
34562ada66cd1501fcb7411a1e1d86729fd7fdc0

SHA256
a12381f97aee2d91568f44b23e866ccc99f0ae5e5961f318ed24b72f4f5da80a

SHA512
4a243c0bc4dbaf892bee91ea7eff9e6a7732d3aa2df5bebd9a4bea2859a30a8511945ce3bb823f7ef921f2e1a98906fb676fce85f25fd5908646b3a2f5d02563

Download Submit

Analysis

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