nymaim | 4e51e6825924a901a82783b4bc56ded96bcd700308ea59565065654ed6d11cb6

Analysis

max time kernel
105s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
05/10/2022, 22:23

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General

Target
file.exe
Size 358KB
Sample221005-2av1jagahn
SHA256 4e51e6825924a901a82783b4bc56ded96bcd700308ea59565065654ed6d11cb6
MD5 ec0b981f79cc9f9c74a8052fd3c372da
SHA1 20c49b24db909161c72fa441252ee46d14036fbf
SHA512 18d9003c4a8ceb8d4b656a6b3861e71a01b5e28ae2a9c23ab5670e5ffa5ef453784fa786b28846d83faf38c82be952cc13cc24355a0ee3d7f01809a1ed335c6d
SSDEEP 6144:tcCN6nLxckD+p5T9QW/r6sYBUfHVhTbWgDuzbgwu+wVfUPk:tcAKtc++HTeW/r6sYBUvV3unntc
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3096	Cleaner.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	file.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 10 IoCs

pid	pid_target	Process	procid_target
2260	3284	WerFault.exe	81
2256	3284	WerFault.exe	81
3488	3284	WerFault.exe	81
1264	3284	WerFault.exe	81
4192	3284	WerFault.exe	81
3868	3284	WerFault.exe	81
3808	3284	WerFault.exe	81
808	3284	WerFault.exe	81
4444	3284	WerFault.exe	81
3956	3284	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
1164	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3284	file.exe
3284	file.exe
3284	file.exe
3284	file.exe
3284	file.exe
3284	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3284	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3096	Cleaner.exe
Token: SeDebugPrivilege	1164	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3284 wrote to memory of 3300	3284	file.exe	106
PID 3284 wrote to memory of 3300	3284	file.exe	106
PID 3284 wrote to memory of 3300	3284	file.exe	106
PID 3300 wrote to memory of 3096	3300	cmd.exe	108
PID 3300 wrote to memory of 3096	3300	cmd.exe	108
PID 3284 wrote to memory of 4932	3284	file.exe	116
PID 3284 wrote to memory of 4932	3284	file.exe	116
PID 3284 wrote to memory of 4932	3284	file.exe	116
PID 4932 wrote to memory of 1164	4932	cmd.exe	118
PID 4932 wrote to memory of 1164	4932	cmd.exe	118
PID 4932 wrote to memory of 1164	4932	cmd.exe	118

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3284
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 452
  2⤵
  - Program crash
  PID:2260
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 764
  2⤵
  - Program crash
  PID:2256
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 804
  2⤵
  - Program crash
  PID:3488
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 792
  2⤵
  - Program crash
  PID:1264
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 836
  2⤵
  - Program crash
  PID:4192
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 928
  2⤵
  - Program crash
  PID:3868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 928
  2⤵
  - Program crash
  PID:3808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 1364
  2⤵
  - Program crash
  PID:808
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\AvW5sei0TQAGU7mqAY6msPruh5dS\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3300
- - C:\Users\Admin\AppData\Local\Temp\AvW5sei0TQAGU7mqAY6msPruh5dS\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\AvW5sei0TQAGU7mqAY6msPruh5dS\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3096
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 1364
  2⤵
  - Program crash
  PID:4444
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3284 -s 1620
  2⤵
  - Program crash
  PID:3956
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4932
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1164

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3284 -ip 3284
1⤵
PID:380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3284 -ip 3284
1⤵
PID:1092

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3284 -ip 3284
1⤵
PID:2896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3284 -ip 3284
1⤵
PID:4688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 3284 -ip 3284
1⤵
PID:4372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3284 -ip 3284
1⤵
PID:4796

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 3284 -ip 3284
1⤵
PID:4788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 3284 -ip 3284
1⤵
PID:4404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 620 -p 3284 -ip 3284
1⤵
PID:1304

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 640 -p 3284 -ip 3284
1⤵
PID:4964

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\AvW5sei0TQAGU7mqAY6msPruh5dS\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\AvW5sei0TQAGU7mqAY6msPruh5dS\Cleaner.exe
Size 2.4MB
SHA256 cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060
MD5 79754768767380ef36ef446c6a1709e4
SHA1 2af83a6e20d7efc3119d312534b3f3968d17776e
SHA512 6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461
SSDEEP 24576:wO4dHPD/oAR4d3G/oAXndxzGmTG2/mR29SGeodc0GmTG2/mR6Trr2h60qP:w/PD/DL/D9CuZrr2h60qP
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\AvW5sei0TQAGU7mqAY6msPruh5dS\Cleaner.exe
Size 2.4MB
SHA256 cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060
MD5 79754768767380ef36ef446c6a1709e4
SHA1 2af83a6e20d7efc3119d312534b3f3968d17776e
SHA512 6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461
SSDEEP 24576:wO4dHPD/oAR4d3G/oAXndxzGmTG2/mR29SGeodc0GmTG2/mR6Trr2h60qP:w/PD/DL/D9CuZrr2h60qP
MD5 SHA1 SHA512 SSDEEP

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memory/3096-141-0x00000262FAED0000-0x00000262FAF12000-memory.dmp

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memory/3096-145-0x00007FF82CB60000-0x00007FF82D621000-memory.dmp

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memory/3096-139-0x00000262F88F0000-0x00000262F8A62000-memory.dmp

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memory/3096-144-0x00007FF82CB60000-0x00007FF82D621000-memory.dmp

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memory/3284-143-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/3284-142-0x00000000006DF000-0x0000000000705000-memory.dmp

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memory/3284-134-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/3284-132-0x00000000006DF000-0x0000000000705000-memory.dmp

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memory/3284-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3284-151-0x00000000006DF000-0x0000000000705000-memory.dmp

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memory/3284-152-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/3284-133-0x00000000005E0000-0x000000000061F000-memory.dmp

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