nymaim | 87689ab18fac220a638cbc49c8d2f19c09d7592d4f0c6e6ecfc2d0959da2ece0

Analysis

max time kernel
51s
max time network
53s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
09/01/2023, 20:18

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General

Target
file.exe
Size 1.2MB
Sample230109-y29ffsff28
SHA256 87689ab18fac220a638cbc49c8d2f19c09d7592d4f0c6e6ecfc2d0959da2ece0
MD5 e260131d2f6bc7ac7d8909a130c23b14
SHA1 c5a8c005029f6a24c3207c40f33f8567d93a403c
SHA512 f7170b3508fa95d7e0c8eeee2de2e8d4de388bdf1ceda0da2dad442c367c8b0c7b0e4f3f0fba69271b44618bf90705e53cdf7e210014da1d41986808ad282d07
SSDEEP 24576:R2078XKlYg/JR/kNrmOS5uZVSFxpzrd9j6vs6DMplcMlxCKYURw6Skl5l/Hlc:R2JKWg/J+Nrmd58Mx9b6vdMP16aJl50
MD5 SHA1 SHA512 SSDEEP

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
836	file.tmp
900	JitFiles135.exe
840	RxKjJnI7.exe

Loads dropped DLL 6 IoCs

pid	Process
888	file.exe
836	file.tmp
836	file.tmp
836	file.tmp
836	file.tmp
900	JitFiles135.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-V10ML.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-GVQLV.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-M2QL0.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-R1QKG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-704MA.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\JitFiles135.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\is-45GBN.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-HO20I.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-2KPAM.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-OB5TE.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-QVVT4.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-DU82A.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-CLNHE.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-HUQQL.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0T5LN.tmp	file.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
536	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
900	JitFiles135.exe
900	JitFiles135.exe
900	JitFiles135.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	536	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 888 wrote to memory of 836	888	file.exe	28
PID 888 wrote to memory of 836	888	file.exe	28
PID 888 wrote to memory of 836	888	file.exe	28
PID 888 wrote to memory of 836	888	file.exe	28
PID 888 wrote to memory of 836	888	file.exe	28
PID 888 wrote to memory of 836	888	file.exe	28
PID 888 wrote to memory of 836	888	file.exe	28
PID 836 wrote to memory of 900	836	file.tmp	29
PID 836 wrote to memory of 900	836	file.tmp	29
PID 836 wrote to memory of 900	836	file.tmp	29
PID 836 wrote to memory of 900	836	file.tmp	29
PID 900 wrote to memory of 840	900	JitFiles135.exe	30
PID 900 wrote to memory of 840	900	JitFiles135.exe	30
PID 900 wrote to memory of 840	900	JitFiles135.exe	30
PID 900 wrote to memory of 840	900	JitFiles135.exe	30
PID 900 wrote to memory of 1520	900	JitFiles135.exe	33
PID 900 wrote to memory of 1520	900	JitFiles135.exe	33
PID 900 wrote to memory of 1520	900	JitFiles135.exe	33
PID 900 wrote to memory of 1520	900	JitFiles135.exe	33
PID 1520 wrote to memory of 536	1520	cmd.exe	35
PID 1520 wrote to memory of 536	1520	cmd.exe	35
PID 1520 wrote to memory of 536	1520	cmd.exe	35
PID 1520 wrote to memory of 536	1520	cmd.exe	35

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:888
- C:\Users\Admin\AppData\Local\Temp\is-802GN.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-802GN.tmp\file.tmp" /SL5="$7012C,1050245,51712,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:836
- - C:\Program Files (x86)\Split Files\JitFiles135.exe
    "C:\Program Files (x86)\Split Files\JitFiles135.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:900
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RxKjJnI7.exe
      4⤵
      Executes dropped EXE
      PID:840
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "JitFiles135.exe" /f & erase "C:\Program Files (x86)\Split Files\JitFiles135.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1520
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "JitFiles135.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:536

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

JitFiles135.exe

Path C:\Program Files (x86)\Split Files\JitFiles135.exe
Size 1.8MB
SHA256 b647fc3a43320cf42de9b19f7470ce151ea41907b63d5270d47b51f9ed262561
MD5 727ce1c9b7a49e7be3b3346236ba4fc4
SHA1 7b57a8bb8f3e37b523061ab7ea9bd03d48776d89
SHA512 a35456a3235db575da5cd4972b8d41fe15982c40c8394a832db2fd32e3343e888536307f0935ea037b572faeb45a50ed92a271fdc20cff5324adedfffcadbe06
SSDEEP 24576:SF+jK6mUsoHRLTfF4hEnnW0WtbkTaEPVnwcu9hoiowTF+09nygV:SF+BdLTfCtt0aQwVV+UF
MD5 SHA1 SHA512 SSDEEP

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JitFiles135.exe

Path C:\Program Files (x86)\Split Files\JitFiles135.exe
Size 1.8MB
SHA256 b647fc3a43320cf42de9b19f7470ce151ea41907b63d5270d47b51f9ed262561
MD5 727ce1c9b7a49e7be3b3346236ba4fc4
SHA1 7b57a8bb8f3e37b523061ab7ea9bd03d48776d89
SHA512 a35456a3235db575da5cd4972b8d41fe15982c40c8394a832db2fd32e3343e888536307f0935ea037b572faeb45a50ed92a271fdc20cff5324adedfffcadbe06
SSDEEP 24576:SF+jK6mUsoHRLTfF4hEnnW0WtbkTaEPVnwcu9hoiowTF+09nygV:SF+BdLTfCtt0aQwVV+UF
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-802GN.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-802GN.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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RxKjJnI7.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RxKjJnI7.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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JitFiles135.exe

Path \Program Files (x86)\Split Files\JitFiles135.exe
Size 1.8MB
SHA256 b647fc3a43320cf42de9b19f7470ce151ea41907b63d5270d47b51f9ed262561
MD5 727ce1c9b7a49e7be3b3346236ba4fc4
SHA1 7b57a8bb8f3e37b523061ab7ea9bd03d48776d89
SHA512 a35456a3235db575da5cd4972b8d41fe15982c40c8394a832db2fd32e3343e888536307f0935ea037b572faeb45a50ed92a271fdc20cff5324adedfffcadbe06
SSDEEP 24576:SF+jK6mUsoHRLTfF4hEnnW0WtbkTaEPVnwcu9hoiowTF+09nygV:SF+BdLTfCtt0aQwVV+UF
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path \Users\Admin\AppData\Local\Temp\is-802GN.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-MVNSG.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-MVNSG.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-MVNSG.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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RxKjJnI7.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RxKjJnI7.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/836-81-0x00000000035B0000-0x000000000457D000-memory.dmp

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memory/836-70-0x00000000035B0000-0x000000000457D000-memory.dmp

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memory/888-54-0x00000000759F1000-0x00000000759F3000-memory.dmp

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memory/888-55-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/888-86-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/888-69-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/900-77-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/900-82-0x0000000000400000-0x00000000013CD000-memory.dmp

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memory/900-73-0x0000000000400000-0x00000000013CD000-memory.dmp

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memory/900-85-0x0000000000400000-0x00000000013CD000-memory.dmp

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memory/900-72-0x0000000000400000-0x00000000013CD000-memory.dmp

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memory/900-71-0x0000000000400000-0x00000000013CD000-memory.dmp

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