nymaim | 71fe5b97d21e3d90f88e850908fadc77e9aa1fe9b4078542ea42686d169976ea

Analysis

max time kernel
66s
max time network
68s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
22/12/2022, 01:46

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General

Target

file.exe
Size

2.0MB
MD5

c780378cabe75e53b25a94f7b667b137
SHA1

7e355b088a75bc8ba54955c81d7bcbe72655479a
SHA256

71fe5b97d21e3d90f88e850908fadc77e9aa1fe9b4078542ea42686d169976ea
SHA512

52de9ef5be43b532f479889c2de7119be998f0795215bcff9aca9d5aa887b780e66a02de55c204866664c336640d5632db5c6deab89676cd5d4974cfe4b92e69
SSDEEP

49152:Sp9OjT3yltncsrjYr7Oec0jgu3zj48JZJSgzxD:Sn8T3iHXYrDc0jggDZ5

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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
1324	is-R0730.tmp
1960	SplitFiles116.exe
680	eWsTLW3yrEgLJD.exe

Loads dropped DLL 10 IoCs

pid	Process
1416	file.exe
1324	is-R0730.tmp
1324	is-R0730.tmp
1324	is-R0730.tmp
1324	is-R0730.tmp
1960	SplitFiles116.exe
1960	SplitFiles116.exe
1960	SplitFiles116.exe
680	eWsTLW3yrEgLJD.exe
680	eWsTLW3yrEgLJD.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

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-9UHAA.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\is-JKBR7.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\is-JF6C3.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\is-DAQTS.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\language\is-5KQI1.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\language\is-5R5PJ.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3ID83.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\is-EL06H.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KOH8H.tmp	is-R0730.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-R0730.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles116.exe	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\language\is-34KFP.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\language\is-39VRK.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\language\is-O11CV.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\language\is-2PEJ4.tmp	is-R0730.tmp
File created	C:\Program Files (x86)\Split Files\is-KA7DV.tmp	is-R0730.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
1436	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1960	SplitFiles116.exe
1960	SplitFiles116.exe
1960	SplitFiles116.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	1324	is-R0730.tmp
Token: SeBackupPrivilege	1324	is-R0730.tmp
Token: SeDebugPrivilege	1436	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 1324	1416	file.exe	26
PID 1416 wrote to memory of 1324	1416	file.exe	26
PID 1416 wrote to memory of 1324	1416	file.exe	26
PID 1416 wrote to memory of 1324	1416	file.exe	26
PID 1416 wrote to memory of 1324	1416	file.exe	26
PID 1416 wrote to memory of 1324	1416	file.exe	26
PID 1416 wrote to memory of 1324	1416	file.exe	26
PID 1324 wrote to memory of 1960	1324	is-R0730.tmp	27
PID 1324 wrote to memory of 1960	1324	is-R0730.tmp	27
PID 1324 wrote to memory of 1960	1324	is-R0730.tmp	27
PID 1324 wrote to memory of 1960	1324	is-R0730.tmp	27
PID 1324 wrote to memory of 1960	1324	is-R0730.tmp	27
PID 1324 wrote to memory of 1960	1324	is-R0730.tmp	27
PID 1324 wrote to memory of 1960	1324	is-R0730.tmp	27
PID 1960 wrote to memory of 680	1960	SplitFiles116.exe	28
PID 1960 wrote to memory of 680	1960	SplitFiles116.exe	28
PID 1960 wrote to memory of 680	1960	SplitFiles116.exe	28
PID 1960 wrote to memory of 680	1960	SplitFiles116.exe	28
PID 1960 wrote to memory of 680	1960	SplitFiles116.exe	28
PID 1960 wrote to memory of 680	1960	SplitFiles116.exe	28
PID 1960 wrote to memory of 680	1960	SplitFiles116.exe	28
PID 1960 wrote to memory of 1840	1960	SplitFiles116.exe	31
PID 1960 wrote to memory of 1840	1960	SplitFiles116.exe	31
PID 1960 wrote to memory of 1840	1960	SplitFiles116.exe	31
PID 1960 wrote to memory of 1840	1960	SplitFiles116.exe	31
PID 1960 wrote to memory of 1840	1960	SplitFiles116.exe	31
PID 1960 wrote to memory of 1840	1960	SplitFiles116.exe	31
PID 1960 wrote to memory of 1840	1960	SplitFiles116.exe	31
PID 1840 wrote to memory of 1436	1840	cmd.exe	33
PID 1840 wrote to memory of 1436	1840	cmd.exe	33
PID 1840 wrote to memory of 1436	1840	cmd.exe	33
PID 1840 wrote to memory of 1436	1840	cmd.exe	33
PID 1840 wrote to memory of 1436	1840	cmd.exe	33
PID 1840 wrote to memory of 1436	1840	cmd.exe	33
PID 1840 wrote to memory of 1436	1840	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1416
- C:\Users\Admin\AppData\Local\Temp\is-8P40A.tmp\is-R0730.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8P40A.tmp\is-R0730.tmp" /SL4 $60122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1814377 316928
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1324
- - C:\Program Files (x86)\Split Files\SplitFiles116.exe
    "C:\Program Files (x86)\Split Files\SplitFiles116.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1960
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eWsTLW3yrEgLJD.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:680
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles116.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles116.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1840
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles116.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1436

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Split Files\SplitFiles116.exe

Filesize
3.3MB

MD5
2733dcf1862a37ee65ebb5a90c7be88d

SHA1
31e8ebf2433a861382f6f5ae734e66048cc35df7

SHA256
2a6000c466ece9df2168371d65c8e33c594c12c033490937eae71fc5c2f90b85

SHA512
97125782f5a4e033abc09274b92e773f75ef0c6004ecf404e68b315a4bbc1772a5c96354d00cc034a2844a22784fcbe738889fabeffc6e2e880db40aa7cbb192

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles116.exe

Filesize
3.3MB

MD5
2733dcf1862a37ee65ebb5a90c7be88d

SHA1
31e8ebf2433a861382f6f5ae734e66048cc35df7

SHA256
2a6000c466ece9df2168371d65c8e33c594c12c033490937eae71fc5c2f90b85

SHA512
97125782f5a4e033abc09274b92e773f75ef0c6004ecf404e68b315a4bbc1772a5c96354d00cc034a2844a22784fcbe738889fabeffc6e2e880db40aa7cbb192

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8P40A.tmp\is-R0730.tmp

Filesize
903KB

MD5
a8d43e7a38a2009bd5d0527ceba02d5b

SHA1
ee273f102f2a186de3f354853ca822354ba0e52a

SHA256
7dc82ab3f67cfc883b0003562a67936b00870776d0a2c157425284772f3a64d4

SHA512
e65ec04be62811943faa59ce34d5659073865156f6cbcd6f017e3f97fd0dd306f83067324c4f58428e045009fcaeb65ae2ca019d22283030bf38c228abb7bc45

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8P40A.tmp\is-R0730.tmp

Filesize
903KB

MD5
a8d43e7a38a2009bd5d0527ceba02d5b

SHA1
ee273f102f2a186de3f354853ca822354ba0e52a

SHA256
7dc82ab3f67cfc883b0003562a67936b00870776d0a2c157425284772f3a64d4

SHA512
e65ec04be62811943faa59ce34d5659073865156f6cbcd6f017e3f97fd0dd306f83067324c4f58428e045009fcaeb65ae2ca019d22283030bf38c228abb7bc45

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eWsTLW3yrEgLJD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eWsTLW3yrEgLJD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\SplitFiles116.exe

Filesize
3.3MB

MD5
2733dcf1862a37ee65ebb5a90c7be88d

SHA1
31e8ebf2433a861382f6f5ae734e66048cc35df7

SHA256
2a6000c466ece9df2168371d65c8e33c594c12c033490937eae71fc5c2f90b85

SHA512
97125782f5a4e033abc09274b92e773f75ef0c6004ecf404e68b315a4bbc1772a5c96354d00cc034a2844a22784fcbe738889fabeffc6e2e880db40aa7cbb192

Download Submit
\Program Files (x86)\Split Files\SplitFiles116.exe

Filesize
3.3MB

MD5
2733dcf1862a37ee65ebb5a90c7be88d

SHA1
31e8ebf2433a861382f6f5ae734e66048cc35df7

SHA256
2a6000c466ece9df2168371d65c8e33c594c12c033490937eae71fc5c2f90b85

SHA512
97125782f5a4e033abc09274b92e773f75ef0c6004ecf404e68b315a4bbc1772a5c96354d00cc034a2844a22784fcbe738889fabeffc6e2e880db40aa7cbb192

Download Submit
\Program Files (x86)\Split Files\SplitFiles116.exe

Filesize
3.3MB

MD5
2733dcf1862a37ee65ebb5a90c7be88d

SHA1
31e8ebf2433a861382f6f5ae734e66048cc35df7

SHA256
2a6000c466ece9df2168371d65c8e33c594c12c033490937eae71fc5c2f90b85

SHA512
97125782f5a4e033abc09274b92e773f75ef0c6004ecf404e68b315a4bbc1772a5c96354d00cc034a2844a22784fcbe738889fabeffc6e2e880db40aa7cbb192

Download Submit
\Users\Admin\AppData\Local\Temp\is-8P40A.tmp\is-R0730.tmp

Filesize
903KB

MD5
a8d43e7a38a2009bd5d0527ceba02d5b

SHA1
ee273f102f2a186de3f354853ca822354ba0e52a

SHA256
7dc82ab3f67cfc883b0003562a67936b00870776d0a2c157425284772f3a64d4

SHA512
e65ec04be62811943faa59ce34d5659073865156f6cbcd6f017e3f97fd0dd306f83067324c4f58428e045009fcaeb65ae2ca019d22283030bf38c228abb7bc45

Download Submit
\Users\Admin\AppData\Local\Temp\is-HRRAN.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-HRRAN.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-HRRAN.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eWsTLW3yrEgLJD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eWsTLW3yrEgLJD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eWsTLW3yrEgLJD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1324-86-0x0000000003860000-0x00000000049AD000-memory.dmp

Filesize
17.3MB

Download
memory/1324-73-0x0000000003860000-0x00000000049AD000-memory.dmp

Filesize
17.3MB

Download
memory/1416-65-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1416-54-0x0000000075E81000-0x0000000075E83000-memory.dmp

Filesize
8KB

Download
memory/1416-98-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1416-55-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1960-74-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/1960-78-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/1960-87-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/1960-88-0x0000000001CB0000-0x0000000002DFD000-memory.dmp

Filesize
17.3MB

Download
memory/1960-89-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1960-93-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/1960-75-0x0000000001CB0000-0x0000000002DFD000-memory.dmp

Filesize
17.3MB

Download
memory/1960-76-0x0000000001CB0000-0x0000000002DFD000-memory.dmp

Filesize
17.3MB

Download
memory/1960-97-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/1960-77-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download