nymaim | 6bf895001af95d5cfc6e6daf3e9997eb1e3d35f7853864dc04fa3b02dd7a2fcd

General

Target

file.exe
Size

2.9MB
MD5

57ec2009f03d1bc0a8953b57dba4096c
SHA1

fb8a9cf8bda4b183b20b3caf03cc80fd92ca21d3
SHA256

6bf895001af95d5cfc6e6daf3e9997eb1e3d35f7853864dc04fa3b02dd7a2fcd
SHA512

3103d8ed4d87628f30acc2a42df0ee9a030c4863e18294e3bac493453d5596b87296c14cea346b3eb2f1cc176012199c7c7c434a6cc17ce3d735ef344bdf2833
SSDEEP

49152:Z2370rqpdJYL1AnSi8tmYN/eclXxiPxvIcltBFarAnz4SAqE9ZmvNB/b84weA5hq:M378gdJYRASi5l3IqFaMzhkZmFN4/Dq

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
4940	is-2PND3.tmp
4908	fvsearcher72.exe
896	IuWV6T.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	fvsearcher72.exe

Loads dropped DLL 1 IoCs

pid	Process
4940	is-2PND3.tmp

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

Drops file in Program Files directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\fvSearcher\fvsearcher72.exe	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\unins000.dat	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-N4T14.tmp	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-PO2B3.tmp	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-MMS2K.tmp	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-MRQS9.tmp	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-VHR1P.tmp	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-FJNH0.tmp	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-EBLR4.tmp	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-HV2NK.tmp	is-2PND3.tmp
File created	C:\Program Files (x86)\fvSearcher\is-LVJ82.tmp	is-2PND3.tmp
File opened for modification	C:\Program Files (x86)\fvSearcher\unins000.dat	is-2PND3.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
5056	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4908	fvsearcher72.exe
4908	fvsearcher72.exe
4908	fvsearcher72.exe
4908	fvsearcher72.exe
4908	fvsearcher72.exe
4908	fvsearcher72.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5056	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1924 wrote to memory of 4940	1924	file.exe	81
PID 1924 wrote to memory of 4940	1924	file.exe	81
PID 1924 wrote to memory of 4940	1924	file.exe	81
PID 4940 wrote to memory of 4908	4940	is-2PND3.tmp	82
PID 4940 wrote to memory of 4908	4940	is-2PND3.tmp	82
PID 4940 wrote to memory of 4908	4940	is-2PND3.tmp	82
PID 4908 wrote to memory of 896	4908	fvsearcher72.exe	83
PID 4908 wrote to memory of 896	4908	fvsearcher72.exe	83
PID 4908 wrote to memory of 896	4908	fvsearcher72.exe	83
PID 4908 wrote to memory of 3068	4908	fvsearcher72.exe	85
PID 4908 wrote to memory of 3068	4908	fvsearcher72.exe	85
PID 4908 wrote to memory of 3068	4908	fvsearcher72.exe	85
PID 3068 wrote to memory of 5056	3068	cmd.exe	87
PID 3068 wrote to memory of 5056	3068	cmd.exe	87
PID 3068 wrote to memory of 5056	3068	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1924
- C:\Users\Admin\AppData\Local\Temp\is-GOA56.tmp\is-2PND3.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-GOA56.tmp\is-2PND3.tmp" /SL4 $200FE "C:\Users\Admin\AppData\Local\Temp\file.exe" 2748595 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4940
- - C:\Program Files (x86)\fvSearcher\fvsearcher72.exe
    "C:\Program Files (x86)\fvSearcher\fvsearcher72.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4908
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IuWV6T.exe
      4⤵
      Executes dropped EXE
      PID:896
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "fvsearcher72.exe" /f & erase "C:\Program Files (x86)\fvSearcher\fvsearcher72.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3068
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "fvsearcher72.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:5056

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\fvSearcher\fvsearcher72.exe

Filesize
4.3MB

MD5
5cb819384c08f6be86b294b76ecc2e8b

SHA1
23538742253eb20cf4eaf6d1614ed2ab875498e1

SHA256
d1d910ba166ee33b4a00fe00b5f6316e646f55128539e9d44f305bdb5f901389

SHA512
c1203f7100d466e49fb18d7b08d45ade6de64aba59efb9d1e7ff23cf3817d1dca9d2b04371aa862a412e248de894be808078b56f1457af8d134a4c809ed83d03

Download Submit
C:\Program Files (x86)\fvSearcher\fvsearcher72.exe

Filesize
4.3MB

MD5
5cb819384c08f6be86b294b76ecc2e8b

SHA1
23538742253eb20cf4eaf6d1614ed2ab875498e1

SHA256
d1d910ba166ee33b4a00fe00b5f6316e646f55128539e9d44f305bdb5f901389

SHA512
c1203f7100d466e49fb18d7b08d45ade6de64aba59efb9d1e7ff23cf3817d1dca9d2b04371aa862a412e248de894be808078b56f1457af8d134a4c809ed83d03

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GOA56.tmp\is-2PND3.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GOA56.tmp\is-2PND3.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-PCAVD.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IuWV6T.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IuWV6T.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1924-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1924-138-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1924-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4908-142-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/4908-144-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/4908-143-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/4908-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4908-152-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download
memory/4908-155-0x0000000000400000-0x0000000001656000-memory.dmp

Filesize
18.3MB

Download

Analysis

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