nymaim | 2f45b8aae288b3abbbb7ed8d9ecfa3ae435920d295480b537e2fd6a00a144d21

Analysis

max time kernel
100s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
23/09/2022, 22:28

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General

Target
file.exe
Size 275KB
Sample220923-2dmtbsbebm
SHA256 2f45b8aae288b3abbbb7ed8d9ecfa3ae435920d295480b537e2fd6a00a144d21
MD5 795c64cb86bb41b400ef54d253b0ea89
SHA1 c467e9b37e8554e9a8882d3eb1e2796bf387412f
SHA512 3f0581fe8cb910eafe58bb75cc09014955d810fb80255337eac6437e80ed6021397ba04016743f1d295e0c5b3739e4c6564635fedb56b0892a5074868420e083
SSDEEP 3072:z+M8SsL6u3IIE75ixwGsvn9rT7sUnWThyILYSxRbBJAD7LFsylNoChrXOBfeE/P:0L7E41svhT7s0WYI9xRb+7maoCdXKe
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
2824	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-1-5-21-2629973501-4017243118-3254762364-1000\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 11 IoCs

pid	pid_target	Process	procid_target
5004	4208	WerFault.exe	80
2248	4208	WerFault.exe	80
1924	4208	WerFault.exe	80
868	4208	WerFault.exe	80
3008	4208	WerFault.exe	80
2944	4208	WerFault.exe	80
212	4208	WerFault.exe	80
3900	4208	WerFault.exe	80
4996	4208	WerFault.exe	80
5084	4208	WerFault.exe	80
4664	4208	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
388	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4208	file.exe
4208	file.exe
4208	file.exe
4208	file.exe
4208	file.exe
4208	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4208	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2824	Cleaner.exe
Token: SeDebugPrivilege	388	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4208 wrote to memory of 3880	4208	file.exe	104
PID 4208 wrote to memory of 3880	4208	file.exe	104
PID 4208 wrote to memory of 3880	4208	file.exe	104
PID 3880 wrote to memory of 2824	3880	cmd.exe	106
PID 3880 wrote to memory of 2824	3880	cmd.exe	106
PID 4208 wrote to memory of 4688	4208	file.exe	118
PID 4208 wrote to memory of 4688	4208	file.exe	118
PID 4208 wrote to memory of 4688	4208	file.exe	118
PID 4688 wrote to memory of 388	4688	cmd.exe	120
PID 4688 wrote to memory of 388	4688	cmd.exe	120
PID 4688 wrote to memory of 388	4688	cmd.exe	120

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:4208
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 452
  2⤵
  - Program crash
  PID:5004
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 764
  2⤵
  - Program crash
  PID:2248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 784
  2⤵
  - Program crash
  PID:1924
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 784
  2⤵
  - Program crash
  PID:868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 816
  2⤵
  - Program crash
  PID:3008
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 840
  2⤵
  - Program crash
  PID:2944
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 1000
  2⤵
  - Program crash
  PID:212
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 1044
  2⤵
  - Program crash
  PID:3900
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 1368
  2⤵
  - Program crash
  PID:4996
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\oCOpVujP89b9KImvsL70LgVF02OO\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3880
- - C:\Users\Admin\AppData\Local\Temp\oCOpVujP89b9KImvsL70LgVF02OO\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\oCOpVujP89b9KImvsL70LgVF02OO\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2824
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 1404
  2⤵
  - Program crash
  PID:5084
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4208 -s 1672
  2⤵
  - Program crash
  PID:4664
- 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:4688
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4208 -ip 4208
1⤵
PID:2188

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 4208 -ip 4208
1⤵
PID:4264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4208 -ip 4208
1⤵
PID:1988

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 4208 -ip 4208
1⤵
PID:3360

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 4208 -ip 4208
1⤵
PID:3156

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4208 -ip 4208
1⤵
PID:4292

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 4208 -ip 4208
1⤵
PID:3916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 4208 -ip 4208
1⤵
PID:4012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4208 -ip 4208
1⤵
PID:3744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 4208 -ip 4208
1⤵
PID:5100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4208 -ip 4208
1⤵
PID:528

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

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\oCOpVujP89b9KImvsL70LgVF02OO\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\oCOpVujP89b9KImvsL70LgVF02OO\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\oCOpVujP89b9KImvsL70LgVF02OO\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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memory/2824-139-0x0000022ECFEA0000-0x0000022ED0020000-memory.dmp

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memory/2824-141-0x0000022EEB4C0000-0x0000022EEB502000-memory.dmp

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memory/2824-142-0x00007FFA66B50000-0x00007FFA67611000-memory.dmp

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memory/2824-144-0x00007FFA66B50000-0x00007FFA67611000-memory.dmp

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memory/4208-132-0x0000000000839000-0x000000000085F000-memory.dmp

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memory/4208-134-0x0000000000400000-0x000000000059F000-memory.dmp

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memory/4208-143-0x0000000000400000-0x000000000059F000-memory.dmp

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memory/4208-145-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4208-150-0x0000000000400000-0x000000000059F000-memory.dmp

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memory/4208-133-0x00000000022D0000-0x000000000230F000-memory.dmp

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